Linux Standard Base Imaging Specification

Linux Standard Base Imaging Specification
LSB Imaging 5.0 
Copyright © 2015 Linux Foundation
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•	Ian F. Darwin
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•	Massachusetts Institute of Technology
•	Apple Inc.
•	Easy Software Products
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•	Till Kamppeter
•	Manfred Wassman
•	Python Software Foundation
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Contents
I Introductory Elements	000
1 Scope	000
1.1 General	000
1.2 Module Specific Scope	000
2 Normative References	000
3 Requirements	000
3.1 Relevant Libraries	000
4 Terms and Definitions	000
5 Documentation Conventions	000
6 PPD Format Extensions	000
II Printing Libraries	000
7 Libraries	000
7.1 Interfaces for libcups	000
7.2 Data Definitions for libcups	000
7.3 Interface Definitions for libcups	000
7.4 Interfaces for libcupsimage	000
7.5 Data Definitions for libcupsimage	000
7.6 Interface Definitions for libcupsimage	000
III Printing Commands	000
8 Printing Commands	000
8.1 Commands and Utilities	000
8.2 Command Behavior	000
IV Execution Environment	000
9 File System Hierarchy	000
V Scanning Libraries	000
10 Libraries	000
10.1 Interfaces for libsane	000
10.2 Data Definitions for libsane	000
VI Package Format and Installation	000
11 Software Installation	000
11.1 Package Dependencies	000
A Alphabetical Listing of Interfaces by Library	000
A.1 libsane	000
A.2 libcups	000
A.3 libcupsimage	000
B GNU Free Documentation License (Informative)	000
B.1 PREAMBLE	000
B.2 APPLICABILITY AND DEFINITIONS	000
B.3 VERBATIM COPYING	000
B.4 COPYING IN QUANTITY	000
B.5 MODIFICATIONS	000
B.6 COMBINING DOCUMENTS	000
B.7 COLLECTIONS OF DOCUMENTS	000
B.8 AGGREGATION WITH INDEPENDENT WORKS	000
B.9 TRANSLATION	000
B.10 TERMINATION	000
B.11 FUTURE REVISIONS OF THIS LICENSE	000
B.12 How to use this License for your documents	000

List of Tables
2-1 Normative References	000
3-1 Standard Library Names	000
7-1 libcups Definition	000
7-2 libcups - CUPS Convenience ABI Function Interfaces	000
7-3 libcups - CUPS Convenience ABI Deprecated Function Interfaces	000
7-4 libcupsimage Definition	000
7-5 libcupsimage - CUPS Raster ABI Function Interfaces	000
7-6 libcupsimage - CUPS Raster ABI Deprecated Function Interfaces	000
8-1 Commands And Utilities	000
10-1 libsane Definition	000
10-2 libsane - libsane interfaces Function Interfaces	000
A-1 libsane Function Interfaces	000
A-2 libcups Function Interfaces	000
A-3 libcupsimage Function Interfaces	000

Foreword
This is version 5.0 of the Linux Standard Base Imaging Specification. This specification is one of a series of volumes under the collective title Linux Standard Base:
•	Common
•	Core
•	Desktop
•	Languages
•	Imaging
Note that the Core and Desktop volumes consist of a generic volume augmented by an architecture-specific volume.

Status of this Document
This is a released specification, version 5.0. Other documents may supersede or augment this specification.
A list of current released Linux Standard Base (LSB) specifications is available at http://refspecs.linuxbase.org (http://refspecs.linuxbase.org/).
If you wish to make comments regarding this document in a manner that is tracked by the LSB project, please submit them using our public bug database at http://bugs.linuxbase.org. Please enter your feedback, carefully indicating the title of the section for which you are submitting feedback, and the volume and version of the specification where you found the problem, quoting the incorrect text if appropriate. If you are suggesting a new feature, please indicate what the problem you are trying to solve is. That is more important than the solution, in fact.
If you do not have or wish to create a bug database account then you can also e-mail feedback to <lsb-discuss@lists.linuxfoundation.org> (subscribe (http://lists.linuxfoundation.org/mailman/listinfo/lsb-discuss), archives (http://lists.linuxfoundation.org/pipermail/lsb-discuss/)), and arrangements will be made to transpose the comments to our public bug database.

Introduction
The LSB defines a binary interface for application programs that are compiled and packaged for LSB-conforming implementations on many different hardware architectures. A binary specification must include information specific to the computer processor architecture for which it is intended. To avoid the complexity of conditional descriptions, the specification has instead been divided into generic parts which are augmented by one of several architecture-specific parts, depending on the target processor architecture; the generic part will indicate when reference must be made to the architecture part, and vice versa.
This document should be used in conjunction with the documents it references. This document enumerates the system components it includes, but descriptions of those components may be included entirely or partly in this document, partly in other documents, or entirely in other reference documents. For example, the section that describes system service routines includes a list of the system routines supported in this interface, formal declarations of the data structures they use that are visible to applications, and a pointer to the underlying referenced specification for information about the syntax and semantics of each call. Only those routines not described in standards referenced by this document, or extensions to those standards, are described in the detail. Information referenced in this way is as much a part of this document as is the information explicitly included here.
The specification carries a version number of either the form x.y or x.y.z. This version number carries the following meaning:
	1.	The first number (x) is the major version number. Versions sharing the same major version number shall be compatible in a backwards direction; that is, a newer version shall be compatible with an older version. Any deletion of a library results in a new major version number. Interfaces marked as deprecated may be removed from the specification at a major version change.
	2.	The second number (y) is the minor version number. Libraries and individual interfaces may be added, but not removed. Interfaces may be marked as deprecated at a minor version change. Other minor changes may be permitted at the discretion of the LSB workgroup.
	3.	The third number (z), if present, is the editorial level. Only editorial changes should be included in such versions.
Since this specification is a descriptive Application Binary Interface, and not a source level API specification, it is not possible to make a guarantee of 100% backward compatibility between major releases. However, it is the intent that those parts of the binary interface that are visible in the source level API will remain backward compatible from version to version, except where a feature marked as "Deprecated" in one release may be removed from a future release. Implementors are strongly encouraged to make use of symbol versioning to permit simultaneous support of applications conforming to different releases of this specification.
LSB is a trademark of the Linux Foundation. Developers of applications or implementations interested in using the trademark should see the Linux Foundation Certification Policy for details.

I Introductory Elements

1 Scope
1.1 General
The Linux Standard Base (LSB) defines a system interface for compiled applications and a minimal environment for support of installation scripts. Its purpose is to enable a uniform industry standard environment for high-volume applications conforming to the LSB.
These specifications are composed of two basic parts: a common part describing those parts of the interface that remain constant across all implementations of the LSB, and an architecture-specific part describing the parts of the interface that vary by processor architecture. Together, the common part and the relevant architecture-specific part for a single hardware architecture provide a complete interface specification for compiled application programs on systems that share a common hardware architecture.
The LSB contains both a set of Application Program Interfaces (APIs) and Application Binary Interfaces (ABIs). APIs may appear in the source code of portable applications, while the compiled binary of that application may use the larger set of ABIs. A conforming implementation provides all of the ABIs listed here. The compilation system may replace (e.g. by macro definition) certain APIs with calls to one or more of the underlying binary interfaces, and may insert calls to binary interfaces as needed.
The LSB is primarily a binary interface definition. Not all of the source level APIs available to applications may be contained in this specification.
1.2 Module Specific Scope
This is the Imaging module of the Linux Standard Base (LSB). This module provides the fundamental system interfaces, libraries, and runtime environment upon which conforming applications and libraries requiring the LSB Imaging module depend.
Interfaces described in LSB Imaging are mandatory except where explicitly listed otherwise. Interfaces described in the LSB Imaging module supplement those described in the LSB Core module. They do not depend on other LSB modules.

2 Normative References
The specifications listed below are referenced in whole or in part by the LSB Imaging specification. Such references may be normative or informative; a reference to specification shall only be considered normative if it is explicitly cited as such. The LSB Imaging specification may make normative references to a portion of these specifications (that is, to define a specific function or group of functions); in such cases, only the explicitly referenced portion of the specification is to be considered normative.
Table 2-1 Normative References
Name	Title	URL	
CUPS API Reference	CUPS 1.2 API Reference	http://www.cups.org/documentation.php/doc-1.2/	
Filesystem Hierarchy Standard	Filesystem Hierarchy Standard (FHS) 3.0	http://refspecs.linuxbase.org/fhs	
ISO C (1999)	ISO/IEC 9899:1999 - Programming Languages -- C		
PPD Specification	PostScript Printer Description File Format Specification version 4.3	http://partners.adobe.com/public/developer/en/ps/5003.PPD_Spec_v4.3.pdf	
PPD Specification Update	Update to PPD Specification Version 4.3	http://partners.adobe.com/public/developer/en/ps/5645.PPD_Update.pdf	
SANE Standard Version 1.04	SANE Standard Version 1.04	http://www.sane-project.org/html/	

3 Requirements
3.1 Relevant Libraries
The libraries listed in Table 3-1 shall be available on a Linux Standard Base system, with the specified runtime names. This list may be supplemented or amended by an architecture-specific specification.
Table 3-1 Standard Library Names
Library	Runtime Name	
libcups	libcups.so.2	
libcupsimage	libcupsimage.so.2	
libsane	libsane.so.1	

These libraries will be in an implementation-defined directory which the dynamic linker shall search by default.

4 Terms and Definitions
For the purposes of this document, the terms given in ISO/IEC Directives, Part 2, Annex H and the following apply.
archLSB
 	Some LSB specification documents have both a generic, architecture-neutral part and an architecture-specific part. The latter describes elements whose definitions may be unique to a particular processor architecture. The term archLSB may be used in the generic part to refer to the corresponding section of the architecture-specific part.
Binary Standard, ABI
 	The total set of interfaces that are available to be used in the compiled binary code of a conforming application, including the run-time details such as calling conventions, binary format, C++ name mangling, etc.
Implementation-defined
 	Describes a value or behavior that is not defined by this document but is selected by an implementor. The value or behavior may vary among implementations that conform to this document. An application should not rely on the existence of the value or behavior. An application that relies on such a value or behavior cannot be assured to be portable across conforming implementations. The implementor shall document such a value or behavior so that it can be used correctly by an application.
Shell Script
 	A file that is read by an interpreter (e.g., awk). The first line of the shell script includes a reference to its interpreter binary.
Source Standard, API
 	The total set of interfaces that are available to be used in the source code of a conforming application. Due to translations, the Binary Standard and the Source Standard may contain some different interfaces.
Undefined
 	Describes the nature of a value or behavior not defined by this document which results from use of an invalid program construct or invalid data input. The value or behavior may vary among implementations that conform to this document. An application should not rely on the existence or validity of the value or behavior. An application that relies on any particular value or behavior cannot be assured to be portable across conforming implementations.
Unspecified
 	Describes the nature of a value or behavior not specified by this document which results from use of a valid program construct or valid data input. The value or behavior may vary among implementations that conform to this document. An application should not rely on the existence or validity of the value or behavior. An application that relies on any particular value or behavior cannot be assured to be portable across conforming implementations.
In addition, for the portions of this specification which build on IEEE Std 1003.1-2001, the definitions given in IEEE Std 1003.1-2001, Base Definitions, Chapter 3 apply.

5 Documentation Conventions
Throughout this document, the following typographic conventions are used: 
function()
 	the name of a function
command
 	the name of a command or utility
CONSTANT
 	a constant value
parameter
 	a parameter
variable
 	a variable
Throughout this specification, several tables of interfaces are presented. Each entry in these tables has the following format: 
name
 	the name of the interface
(symver)
 	An optional symbol version identifier, if required.
[refno]
 	A reference number indexing the table of referenced specifications that follows this table.
For example, 
forkpty(GLIBC_2.0) [SUSv4]	

refers to the interface named forkpty() with symbol version GLIBC_2.0 that is defined in the reference indicated by the tag SUSv4. 
Note: For symbols with versions which differ between architectures, the symbol versions are defined in the architecture specific parts of of this module specification only. In the generic part, they will appear without symbol versions.

6 PPD Format Extensions
The Postscript Printer Description (PPD) format is used in a text file to describe device capabilities for a printing device. PPD files shall conform to the format described by PPD Specification and PPD Specification Update. In addition, several extensions to the standard attribute list are recognized, as listed below. The "cupsVersion" attribute is required in a compliant PPD, while the other attributes are optional.
cupsColorProfile
 	This string attribute specifies an sRGB-based color profile consisting of gamma and density controls and a 3x3 CMY color transform matrix.
The attribute has the following parameter usage:
*cupsColorProfile Resolution/MediaType: "density gamma m00 m01 m02 m10 m11 m12 m20 m21 m22"
The Resolution and MediaType values may be "-" to act as a wildcard. Otherwise, they must match one of the Resolution or MediaType attributes defined in the PPD file.
The density and gamma values define the gamma and density adjustment function such that (in terms of C math):
f(x) = density * pow(x, gamma)
The m00 through m22 values define a 3x3 transformation matrix for the CMY color values. The density function is applied after the CMY transformation:
| m00 m01 m02 | | m10 m11 m12 | | m20 m21 m22 |
cupsFax
 	This boolean attribute specifies whether the PPD defines a facsimile device. The default is false.
cupsFilter
 	The attribute has the following parameter usage:
*cupsFilter: "source/type cost program"
This string attribute provides a conversion rule from the given source type to the printer's native format using the filter "program". A source type is specified according to the conventions of the MIME specification, using "type/subtype" nomenclature, and may refer to a standard MIME type or a CUPS-specific MIME type using the prefix "vnd.cups-" in the subtype. If a printer supports the source type directly, the special filter program "-" may be specified. The cost is an arbitrary positive integer, used to calculate the relative impact a print job has on system load.
cupsManualCopies
 	This boolean attribute notifies the RIP filters that the destination printer does not support copy generation in hardware. The default value is false.
cupsModelNumber
 	This integer attribute specifies a printer-specific model number. This number can be used by a filter program to adjust the output for a specific model of printer.
cupsVersion
 	The attribute has the following parameter usage:
*cupsVersion: "major.minor"
This required attribute describes which version of the CUPS PPD file extensions was used. Currently it must be the string "1.0" or "1.1". The strings "1.2" and "1.3" represent newer versions of the CUPS PPD API that are not covered in this version of the specification, and are currently not allowed, although they may be found in non-conforming PPDs which use a newer version of the CUPS PPD specification.
FoomaticIDs
 	The attribute has the following parameter usage:
*FoomaticIDs printer driver
The parameters correspond to the IDs in the Foomatic database for the printer and driver, respectively.
FoomaticNoPageAccounting
 	This boolean attribute tells foomatic-rip whether or not to insert accounting information into the PostScript data stream. By default, foomatic-rip will insert this information.
FoomaticRIPCommandLine
 	The attribute has the following parameter usage:
*FoomaticRIPCommandLine "code"
This attribute defines the command line in the "code" parameter for the renderer that is called by foomatic-rip. The command must take PostScript on standard input and provide the job data stream in the printer's native language on standard output. The command must exit with status 0 if the conversion was successful and exit with another status if an error occurs. The "code" parameter may contain option setting wildcards, as described below under "FoomaticRIPOption".
FoomaticRIPDefault
 	The attribute has the following parameter usage:
*FoomaticRIPDefaultOptionName value
This attribute sets a default for a Foomatic option. The name of the attribute should contain the name of the option appended to "FoomaticRIPDefault", with the desired default value as the only parameter.
This option is only used to provide numeric options in the PPD, which are not supported by the Adobe spec, via enumerated options, and should not be used except for that purpose.
FoomaticRIPOption
 	The attribute has the following parameter usage:
*FoomaticRIPOption name: type style spot [order]
This attribute sets options for the command line specified in the "FoomaticRIPCommandLine" attribute. The "name" parameter specifies the option name, the "type" parameter specifies the option type, the "style" parameter specifies one of "CmdLine", "JCL", "PS", or "Composite", and the "spot" parameter specifies a letter, which is prepended with a "%" and used in the "FoomaticRIPCommandLine" attribute to indicate where the option should go in the command line. The optional "order" parameter indicates an order number for one-choice options.
FoomaticRIPOptionAllowedChars
 	The attribute has the following parameter usage:
*FoomaticRIPOptionAllowedChars name: "code"
This option sets a list of allowed characters in a string option. The "name" parameter identifies the option, while the "code" parameter is a list of allowed characters.
FoomaticRIPOptionAllowedRegExp
 	The attribute has the following parameter usage:
*FoomaticRIPOptionAllowedRegExp name: "code"
This option causes the option named by "name" to be validated by the Perl-style regular expression in "code".
FoomaticRIPOptionMaxLength
 	The attribute has the following parameter usage:
*FoomaticRIPOptionMaxLength name: length
For string or password options, this attribute sets a maximum length which can be returned. The "name" parameter identifies the option, and the "length" parameter is the maximum number of characters allowed.
FoomaticRIPOptionPrototype
 	The attribute has the following parameter usage:
*FoomaticRIPOptionPrototype name: "code"
For string, password, or simulated numeric options, this attribute sets a code prototype to be inserted into the output. This works for options where the FoomaticRIPOption "style" parameter is set to CmdLine, JCL, or PS. The value of the option can be represented with the string "%s" in the "code" parameter.
FoomaticRIPOptionRange
 	The attribute has the following parameter usage:
*FoomaticRIPOptionRange name: min max
This attribute adds a minimux and maximum limit to numeric options (that are simulated by Foomatic via emumerated options). The "name" parameter identifies the option, while the "min" and "max" parameters set the minumum and maximum allowed values, respectively, for the option.
FoomaticRIPOptionSetting
 	The attribute has the following parameter usage:
*FoomaticRIPOptionSetting name=choice: "code"
This attribute adds code to an option, identified by "name", with a FoomaticRIPOption "style" parameter set to Composite. It inserts options for other options that are members of the Composite option "name".
FoomaticRIPPostPipe
 	The attribute has the following parameter usage:
*FoomaticRIPPostPipe "code"
This attribute defines the command line in the "code" parameter for the job output command used by foomatic-rip in standalone mode. The command should take printer-native data on standard input. The "code" parameter should include the preceding shell pipe symbol ("|").

II Printing Libraries

7 Libraries
7.1 Interfaces for libcups
Table 7-1 defines the library name and shared object name for the libcups library
Table 7-1 libcups Definition
Library:	libcups	
SONAME:	libcups.so.2	

The behavior of the interfaces in this library is specified by the following specifications:
[CUPS 1.2] CUPS API Reference	
[LSB] This Specification	

7.1.1 CUPS Convenience ABI
7.1.1.1 Interfaces for CUPS Convenience ABI
An LSB conforming implementation shall provide the generic functions for CUPS Convenience ABI specified in Table 7-2, with the full mandatory functionality as described in the referenced underlying specification.
Table 7-2 libcups - CUPS Convenience ABI Function Interfaces
cupsAddDest [LSB]	cupsAddOption [LSB]	cupsCancelJob [LSB]	cupsDoAuthentication [CUPS 1.2]	
cupsDoFileRequest [CUPS 1.2]	cupsEncodeOptions [CUPS 1.2]	cupsEncryption [LSB]	cupsFreeDests [LSB]	
cupsFreeJobs [LSB]	cupsFreeOptions [LSB]	cupsGetDefault [LSB]	cupsGetDefault2 [CUPS 1.2]	
cupsGetDest [LSB]	cupsGetDests [LSB]	cupsGetDests2 [CUPS 1.2]	cupsGetFd [CUPS 1.2]	
cupsGetFile [CUPS 1.2]	cupsGetJobs [LSB]	cupsGetJobs2 [CUPS 1.2]	cupsGetOption [LSB]	
cupsGetPPD [LSB]	cupsGetPPD2 [CUPS 1.2]	cupsGetPassword [LSB]	cupsLangEncoding [LSB]	
cupsLangFlush [LSB]	cupsLangFree [LSB]	cupsLangGet [LSB]	cupsLastError [LSB]	
cupsMarkOptions [LSB]	cupsParseOptions [LSB]	cupsPrintFile [LSB]	cupsPrintFile2 [CUPS 1.2]	
cupsPrintFiles [LSB]	cupsPrintFiles2 [CUPS 1.2]	cupsPutFd [CUPS 1.2]	cupsPutFile [CUPS 1.2]	
cupsServer [LSB]	cupsSetDests [LSB]	cupsSetDests2 [CUPS 1.2]	cupsSetEncryption [LSB]	
cupsSetPasswordCB [LSB]	cupsSetServer [LSB]	cupsSetUser [LSB]	cupsTempFd [LSB]	
cupsUser [LSB]	httpBlocking [CUPS 1.2]	httpCheck [CUPS 1.2]	httpClearCookie [CUPS 1.2]	
httpClearFields [CUPS 1.2]	httpClose [CUPS 1.2]	httpConnect [CUPS 1.2]	httpConnectEncrypt [CUPS 1.2]	
httpDecode64_2 [CUPS 1.2]	httpDelete [CUPS 1.2]	httpEncode64_2 [CUPS 1.2]	httpEncryption [CUPS 1.2]	
httpError [CUPS 1.2]	httpFlush [CUPS 1.2]	httpGet [CUPS 1.2]	httpGetCookie [CUPS 1.2]	
httpGetDateString [CUPS 1.2]	httpGetDateTime [CUPS 1.2]	httpGetField [CUPS 1.2]	httpGetHostByName [CUPS 1.2]	
httpGetSubField [CUPS 1.2]	httpGets [CUPS 1.2]	httpHead [CUPS 1.2]	httpInitialize [CUPS 1.2]	
httpMD5 [CUPS 1.2]	httpMD5Final [CUPS 1.2]	httpMD5String [CUPS 1.2]	httpOptions [CUPS 1.2]	
httpPost [CUPS 1.2]	httpPut [CUPS 1.2]	httpReconnect [CUPS 1.2]	httpSetCookie [CUPS 1.2]	
httpSetField [CUPS 1.2]	httpStatus [CUPS 1.2]	httpTrace [CUPS 1.2]	httpUpdate [CUPS 1.2]	
httpWait [CUPS 1.2]	ippAddBoolean [CUPS 1.2]	ippAddBooleans [CUPS 1.2]	ippAddCollection [CUPS 1.2]	
ippAddCollections [CUPS 1.2]	ippAddDate [CUPS 1.2]	ippAddInteger [CUPS 1.2]	ippAddIntegers [CUPS 1.2]	
ippAddRange [CUPS 1.2]	ippAddRanges [CUPS 1.2]	ippAddResolution [CUPS 1.2]	ippAddResolutions [CUPS 1.2]	
ippAddSeparator [CUPS 1.2]	ippAddString [CUPS 1.2]	ippAddStrings [CUPS 1.2]	ippDateToTime [CUPS 1.2]	
ippDelete [CUPS 1.2]	ippDeleteAttribute [CUPS 1.2]	ippErrorString [CUPS 1.2]	ippFindAttribute [CUPS 1.2]	
ippFindNextAttribute [CUPS 1.2]	ippLength [CUPS 1.2]	ippNew [CUPS 1.2]	ippPort [CUPS 1.2]	
ippRead [CUPS 1.2]	ippReadFile [CUPS 1.2]	ippReadIO [CUPS 1.2]	ippSetPort [CUPS 1.2]	
ippTimeToDate [CUPS 1.2]	ippWrite [CUPS 1.2]	ippWriteFile [CUPS 1.2]	ippWriteIO [CUPS 1.2]	
ppdClose [LSB]	ppdCollect [LSB]	ppdConflicts [LSB]	ppdEmit [LSB]	
ppdEmitFd [LSB]	ppdEmitJCL [LSB]	ppdErrorString [LSB]	ppdFindAttr [LSB]	
ppdFindChoice [LSB]	ppdFindMarkedChoice [LSB]	ppdFindNextAttr [LSB]	ppdFindOption [LSB]	
ppdIsMarked [LSB]	ppdLastError [LSB]	ppdMarkDefaults [LSB]	ppdMarkOption [LSB]	
ppdOpen [LSB]	ppdOpenFd [LSB]	ppdOpenFile [LSB]	ppdPageLength [LSB]	
ppdPageSize [LSB]	ppdPageWidth [LSB]	ppdSetConformance [LSB]	

An LSB conforming implementation shall provide the generic deprecated functions for CUPS Convenience ABI specified in Table 7-3, with the full mandatory functionality as described in the referenced underlying specification.
Note: These interfaces are deprecated, and applications should avoid using them. These interfaces may be withdrawn in future releases of this specification.
Table 7-3 libcups - CUPS Convenience ABI Deprecated Function Interfaces
httpConnect [CUPS 1.2]	

	

7.2 Data Definitions for libcups
This section defines global identifiers and their values that are associated with interfaces contained in libcups. These definitions are organized into groups that correspond to system headers. This convention is used as a convenience for the reader, and does not imply the existence of these headers, or their content. Where an interface is defined as requiring a particular system header file all of the data definitions for that system header file presented here shall be in effect.
This section gives data definitions to promote binary application portability, not to repeat source interface definitions available elsewhere. System providers and application developers should use this ABI to supplement - not to replace - source interface definition specifications.
This specification uses the ISO C (1999) C Language as the reference programming language, and data definitions are specified in ISO C format. The C language is used here as a convenient notation. Using a C language description of these data objects does not preclude their use by other programming languages.
7.2.1 cups/cups.h

#define _CUPS_CUPS_H_
#define CUPS_VERSION_MAJOR      1
#define CUPS_VERSION_MINOR      1
#define CUPS_VERSION    1.0123
#define CUPS_VERSION_PATCH      23
#define cupsLangDefault()       cupsLangGet(NULL)

typedef enum {
    CUPS_AUTO_ENCODING = -1,
    CUPS_US_ASCII = 0,
    CUPS_ISO8859_1 = 1,
    CUPS_ISO8859_2 = 2,
    CUPS_ISO8859_3 = 3,
    CUPS_ISO8859_4 = 4,
    CUPS_ISO8859_5 = 5,
    CUPS_ISO8859_6 = 6,
    CUPS_ISO8859_7 = 7,
    CUPS_ISO8859_8 = 8,
    CUPS_ISO8859_9 = 9,
    CUPS_ISO8859_10 = 10,
    CUPS_UTF8 = 11,
    CUPS_ISO8859_13 = 12,
    CUPS_ISO8859_14 = 13,
    CUPS_ISO8859_15 = 14,
    CUPS_WINDOWS_874 = 15,
    CUPS_WINDOWS_1250 = 16,
    CUPS_WINDOWS_1251 = 17,
    CUPS_WINDOWS_1252 = 18,
    CUPS_WINDOWS_1253 = 19,
    CUPS_WINDOWS_1254 = 20,
    CUPS_WINDOWS_1255 = 21,
    CUPS_WINDOWS_1256 = 22,
    CUPS_WINDOWS_1257 = 23,
    CUPS_WINDOWS_1258 = 24,
    CUPS_KOI8_R = 25,
    CUPS_KOI8_U = 26
} cups_encoding_t;
typedef struct cups_lang_s {
    struct cups_lang_s *next;
    int used;
    cups_encoding_t encoding;
    char language[16];
    cups_array_t *strings;
} cups_lang_t;
typedef enum {
    HTTP_ENCRYPT_IF_REQUESTED = 0,
    HTTP_ENCRYPT_NEVER = 1,
    HTTP_ENCRYPT_REQUIRED = 2,
    HTTP_ENCRYPT_ALWAYS = 3
} http_encryption_t;
typedef struct {
    char *name;
    char *value;
} cups_option_t;
typedef struct {
    char *name;
    char *instance;
    int is_default;
    int num_options;
    cups_option_t *options;
} cups_dest_t;
typedef enum {
    HTTP_WAITING = 0,
    HTTP_OPTIONS = 1,
    HTTP_GET = 2,
    HTTP_GET_SEND = 3,
    HTTP_HEAD = 4,
    HTTP_POST = 5,
    HTTP_POST_RECV = 6,
    HTTP_POST_SEND = 7,
    HTTP_PUT = 8,
    HTTP_PUT_RECV = 9,
    HTTP_DELETE = 10,
    HTTP_TRACE = 11,
    HTTP_CLOSE = 12,
    HTTP_STATUS = 13
} http_state_t;
typedef enum {
    HTTP_ERROR = -1,
    HTTP_CONTINUE = 100,
    HTTP_SWITCHING_PROTOCOLS = 101,
    HTTP_OK = 200,
    HTTP_CREATED = 201,
    HTTP_ACCEPTED = 202,
    HTTP_NOT_AUTHORITATIVE = 203,
    HTTP_NO_CONTENT = 204,
    HTTP_RESET_CONTENT = 205,
    HTTP_PARTIAL_CONTENT = 206,
    HTTP_MULTIPLE_CHOICES = 300,
    HTTP_MOVED_PERMANENTLY = 301,
    HTTP_MOVED_TEMPORARILY = 302,
    HTTP_SEE_OTHER = 303,
    HTTP_NOT_MODIFIED = 304,
    HTTP_USE_PROXY = 305,
    HTTP_BAD_REQUEST = 400,
    HTTP_UNAUTHORIZED = 401,
    HTTP_PAYMENT_REQUIRED = 402,
    HTTP_FORBIDDEN = 403,
    HTTP_NOT_FOUND = 404,
    HTTP_METHOD_NOT_ALLOWED = 405,
    HTTP_NOT_ACCEPTABLE = 406,
    HTTP_PROXY_AUTHENTICATION = 407,
    HTTP_REQUEST_TIMEOUT = 408,
    HTTP_CONFLICT = 409,
    HTTP_GONE = 410,
    HTTP_LENGTH_REQUIRED = 411,
    HTTP_PRECONDITION = 412,
    HTTP_REQUEST_TOO_LARGE = 413,
    HTTP_URI_TOO_LONG = 414,
    HTTP_UNSUPPORTED_MEDIATYPE = 415,
    HTTP_UPGRADE_REQUIRED = 426,
    HTTP_SERVER_ERROR = 500,
    HTTP_NOT_IMPLEMENTED = 501,
    HTTP_BAD_GATEWAY = 502,
    HTTP_SERVICE_UNAVAILABLE = 503,
    HTTP_GATEWAY_TIMEOUT = 504,
    HTTP_NOT_SUPPORTED = 505
} http_status_t;
typedef enum {
    HTTP_0_9 = 9,
    HTTP_1_0 = 100,
    HTTP_1_1 = 101
} http_version_t;
typedef enum {
    HTTP_KEEPALIVE_OFF = 0,
    HTTP_KEEPALIVE_ON = 1
} http_keepalive_t;
typedef enum {
    HTTP_ENCODE_LENGTH = 0,
    HTTP_ENCODE_CHUNKED = 1
} http_encoding_t;
typedef enum {
    IPP_JOB_PENDING = 3,
    IPP_JOB_HELD = 4,
    IPP_JOB_PROCESSING = 5,
    IPP_JOB_STOPPED = 6,
    IPP_JOB_CANCELLED = 7,
    IPP_JOB_ABORTED = 8,
    IPP_JOB_COMPLETED = 9
} ipp_jstate_t;
typedef struct {
    int id;
    char *dest;
    char *title;
    char *user;
    char *format;
    ipp_jstate_t state;
    int size;
    int priority;
    time_t completed_time;
    time_t creation_time;
    time_t processing_time;
} cups_job_t;
typedef struct _cups_array_s cups_array_t;

typedef struct _http_s http_t;
extern int cupsAddDest(const char *name, const char *instance,
                       int num_dests, cups_dest_t * *dests);
extern int cupsAddOption(const char *name, const char *value,
                         int num_options, cups_option_t * *options);
extern int cupsCancelJob(const char *printer, int job);
extern int cupsDoAuthentication(http_t * http, const char *method,
                                const char *resource);
extern ipp_t *cupsDoFileRequest(http_t * http, ipp_t * request,
                                const char *resource,
                                const char *filename);
extern void cupsEncodeOptions(ipp_t * ipp, int num_options,
                              cups_option_t * options);
extern http_encryption_t cupsEncryption(void);
extern void cupsFreeDests(int num_dests, cups_dest_t * dests);
extern void cupsFreeJobs(int num_jobs, cups_job_t * jobs);
extern void cupsFreeOptions(int num_options, cups_option_t * options);
extern const char *cupsGetDefault(void);
extern const char *cupsGetDefault2(http_t * http);
extern cups_dest_t *cupsGetDest(const char *name, const char *instance,
                                int num_dests, cups_dest_t * dests);
extern int cupsGetDests(cups_dest_t * *dests);
extern int cupsGetDests2(http_t * http, cups_dest_t * *dests);
extern http_status_t cupsGetFd(http_t * http, const char *resource,
                               int fd);
extern http_status_t cupsGetFile(http_t * http, const char *resource,
                                 const char *filename);
extern int cupsGetJobs(cups_job_t * *jobs, const char *dest, int myjobs,
                       int completed);
extern int cupsGetJobs2(http_t * http, cups_job_t * *jobs,
                        const char *dest, int myjobs, int completed);
extern const char *cupsGetOption(const char *name, int num_options,
                                 cups_option_t * options);
extern const char *cupsGetPPD(const char *printer);
extern const char *cupsGetPPD2(http_t * http, const char *printer);
extern const char *cupsGetPassword(const char *prompt);
extern const char *cupsLangEncoding(cups_lang_t * lang);
extern void cupsLangFlush(void);
extern void cupsLangFree(cups_lang_t * lang);
extern cups_lang_t *cupsLangGet(const char *language);
extern ipp_status_t cupsLastError(void);
extern int cupsMarkOptions(ppd_file_t * ppd, int num_options,
                           cups_option_t * options);
extern int cupsParseOptions(const char *arg, int num_options,
                            cups_option_t * *options);
extern int cupsPrintFile(const char *printer, const char *filename,
                         const char *title, int num_options,
                         cups_option_t * options);
extern int cupsPrintFile2(http_t * http, const char *printer,
                          const char *filename, const char *title,
                          int num_options, cups_option_t * options);
extern int cupsPrintFiles(const char *printer, int num_files,
                          const char **files, const char *title,
                          int num_options, cups_option_t * options);
extern int cupsPrintFiles2(http_t * http, const char *printer,
                           int num_files, const char **files,
                           const char *title, int num_options,
                           cups_option_t * options);
extern http_status_t cupsPutFd(http_t * http, const char *resource,
                               int fd);
extern http_status_t cupsPutFile(http_t * http, const char *resource,
                                 const char *filename);
extern const char *cupsServer(void);
extern void cupsSetDests(int num_dests, cups_dest_t * dests);
extern int cupsSetDests2(http_t * http, int num_dests,
                         cups_dest_t * dests);
extern void cupsSetEncryption(http_encryption_t e);
extern void cupsSetPasswordCB(const char *(*cb) (const char *));
extern void cupsSetServer(const char *server);
extern void cupsSetUser(const char *user);
extern int cupsTempFd(char *filename, int len);
extern const char *cupsUser(void);
7.2.2 cups/http.h

#define HTTP_MAX_URI    1024
#define HTTP_MAX_BUFFER 2048
#define HTTP_MAX_HOST   256
#define HTTP_MAX_VALUE  256

typedef enum http_auth_e {
    HTTP_AUTH_NONE,
    HTTP_AUTH_BASIC,
    HTTP_AUTH_MD5,
    HTTP_AUTH_MD5_SESS,
    HTTP_AUTH_MD5_INT,
    HTTP_AUTH_MD5_SESS_INT,
    HTTP_AUTH_NEGOTIATE
} http_auth_t;
typedef enum http_field_e {
    HTTP_FIELD_UNKNOWN,
    HTTP_FIELD_ACCEPT_LANGUAGE,
    HTTP_FIELD_ACCEPT_RANGES,
    HTTP_FIELD_AUTHORIZATION,
    HTTP_FIELD_CONNECTION,
    HTTP_FIELD_CONTENT_ENCODING,
    HTTP_FIELD_CONTENT_LANGUAGE,
    HTTP_FIELD_CONTENT_LENGTH,
    HTTP_FIELD_CONTENT_LOCATION,
    HTTP_FIELD_CONTENT_MD5,
    HTTP_FIELD_CONTENT_RANGE,
    HTTP_FIELD_CONTENT_TYPE,
    HTTP_FIELD_CONTENT_VERSION,
    HTTP_FIELD_DATE,
    HTTP_FIELD_HOST,
    HTTP_FIELD_IF_MODIFIED_SINCE,
    HTTP_FIELD_IF_UNMODIFIED_SINCE,
    HTTP_FIELD_KEEP_ALIVE,
    HTTP_FIELD_LAST_MODIFIED,
    HTTP_FIELD_LINK,
    HTTP_FIELD_LOCATION,
    HTTP_FIELD_RANGE,
    HTTP_FIELD_REFERER,
    HTTP_FIELD_RETRY_AFTER,
    HTTP_FIELD_TRANSFER_ENCODING,
    HTTP_FIELD_UPGRADE,
    HTTP_FIELD_USER_AGENT,
    HTTP_FIELD_WWW_AUTHENTICATE,
    HTTP_FIELD_MAX
} http_field_t;
typedef enum http_uri_status_e {
    HTTP_URI_OVERFLOW,
    HTTP_URI_BAD_ARGUMENTS,
    HTTP_URI_BAD_RESOURCE,
    HTTP_URI_BAD_PORT,
    HTTP_URI_BAD_HOSTNAME,
    HTTP_URI_BAD_USERNAME,
    HTTP_URI_BAD_SCHEME,
    HTTP_URI_BAD_URI,
    HTTP_URI_OK,
    HTTP_URI_MISSING_SCHEME,
    HTTP_URI_UNKNOWN_SCHEME,
    HTTP_URI_MISSING_RESOURCE
} http_uri_status_t;
typedef enum http_uri_coding_e {
    HTTP_URI_CODING_NONE,
    HTTP_URI_CODING_USERNAME,
    HTTP_URI_CODING_HOSTNAME,
    HTTP_URI_CODING_RESOURCE,
    HTTP_URI_CODING_MOST,
    HTTP_URI_CODING_QUERY,
    HTTP_URI_CODING_ALL
} http_uri_coding_t;
typedef union _http_addr_u {
    struct sockaddr addr;
    struct sockaddr_in ipv4;
    struct sockaddr_in6 ipv6;
    struct sockaddr_un un;
    char pad[256];
} http_addr_t;
typedef struct http_addrlist_s {
    struct http_addrlist_s *next;
    http_addr_t addr;
} http_addrlist_t;
extern void httpBlocking(http_t * http, int b);
extern int httpCheck(http_t * http);
extern void httpClearCookie(http_t * http);
extern void httpClearFields(http_t * http);
extern void httpClose(http_t * http);
extern http_t *httpConnect(const char *host, int port);
extern http_t *httpConnectEncrypt(const char *host, int port,
                                  http_encryption_t encryption);
extern char *httpDecode64_2(char *out, int *outlen, const char *in);
extern int httpDelete(http_t * http, const char *uri);
extern char *httpEncode64_2(char *out, int outlen, const char *in,
                            int inlen);
extern int httpEncryption(http_t * http, http_encryption_t e);
extern int httpError(http_t * http);
extern void httpFlush(http_t * http);
extern int httpGet(http_t * http, const char *uri);
extern const char *httpGetCookie(http_t * http);
extern const char *httpGetDateString(time_t t);
extern time_t httpGetDateTime(const char *s);
extern const char *httpGetField(http_t * http, http_field_t field);
extern struct hostent *httpGetHostByName(const char *name);
extern char *httpGetSubField(http_t * http, http_field_t field,
                             const char *name, char *value);
extern char *httpGets(char *line, int length, http_t * http);
extern int httpHead(http_t * http, const char *uri);
extern void httpInitialize(void);
extern char *httpMD5(const char *, const char *, const char *, char *);
extern char *httpMD5Final(const char *, const char *, const char *,
                          char *);
extern char *httpMD5String(const unsigned char *, char *);
extern int httpOptions(http_t * http, const char *uri);
extern int httpPost(http_t * http, const char *uri);
extern int httpPut(http_t * http, const char *uri);
extern int httpReconnect(http_t * http);
extern void httpSetCookie(http_t * http, const char *cookie);
extern void httpSetField(http_t * http, http_field_t field,
                         const char *value);
extern const char *httpStatus(http_status_t status);
extern int httpTrace(http_t * http, const char *uri);
extern http_status_t httpUpdate(http_t * http);
extern int httpWait(http_t * http, int msec);
7.2.3 cups/ipp.h

#define IPP_MAX_NAME    256
#define IPP_MAX_LENGTH  32767
#define IPP_PORT        631
#define IPP_MAX_VALUES  8
#define CUPS_ADD_CLASS  CUPS_ADD_MODIFY_CLASS
#define CUPS_ADD_PRINTER        CUPS_ADD_MODIFY_PRINTER
#define IPP_ERROR_JOB_CANCELLED IPP_ERROR_JOB_CANCELED
#define IPP_JOB_CANCELLED       IPP_JOB_CANCELED
#define IPP_VERSION     "\001\001"

typedef enum {
    IPP_OK = 0,
    IPP_OK_SUBST = 1,
    IPP_OK_CONFLICT = 2,
    IPP_OK_IGNORED_SUBSCRIPTIONS = 3,
    IPP_OK_IGNORED_NOTIFICATIONS = 4,
    IPP_OK_TOO_MANY_EVENTS = 5,
    IPP_OK_BUT_CANCEL_SUBSCRIPTION = 6,
    IPP_REDIRECTION_OTHER_SITE = 768,
    IPP_BAD_REQUEST = 1024,
    IPP_FORBIDDEN = 1025,
    IPP_NOT_AUTHENTICATED = 1026,
    IPP_NOT_AUTHORIZED = 1027,
    IPP_NOT_POSSIBLE = 1028,
    IPP_TIMEOUT = 1029,
    IPP_NOT_FOUND = 1030,
    IPP_GONE = 1031,
    IPP_REQUEST_ENTITY = 1032,
    IPP_REQUEST_VALUE = 1033,
    IPP_DOCUMENT_FORMAT = 1034,
    IPP_ATTRIBUTES = 1035,
    IPP_URI_SCHEME = 1036,
    IPP_CHARSET = 1037,
    IPP_CONFLICT = 1038,
    IPP_COMPRESSION_NOT_SUPPORTED = 1039,
    IPP_COMPRESSION_ERROR = 1040,
    IPP_DOCUMENT_FORMAT_ERROR = 1041,
    IPP_DOCUMENT_ACCESS_ERROR = 1042,
    IPP_ATTRIBUTES_NOT_SETTABLE = 1043,
    IPP_IGNORED_ALL_SUBSCRIPTIONS = 1044,
    IPP_TOO_MANY_SUBSCRIPTIONS = 1045,
    IPP_IGNORED_ALL_NOTIFICATIONS = 1046,
    IPP_PRINT_SUPPORT_FILE_NOT_FOUND = 1047,
    IPP_INTERNAL_ERROR = 1280,
    IPP_OPERATION_NOT_SUPPORTED = 1281,
    IPP_SERVICE_UNAVAILABLE = 1282,
    IPP_VERSION_NOT_SUPPORTED = 1283,
    IPP_DEVICE_ERROR = 1284,
    IPP_TEMPORARY_ERROR = 1285,
    IPP_NOT_ACCEPTING = 1286,
    IPP_PRINTER_BUSY = 1287,
    IPP_ERROR_JOB_CANCELLED = 1288,
    IPP_MULTIPLE_JOBS_NOT_SUPPORTED = 1289,
    IPP_PRINTER_IS_DEACTIVATED = 1290
} ipp_status_t;
typedef enum ipp_tag_e {
    IPP_TAG_ZERO,
    IPP_TAG_OPERATION,
    IPP_TAG_JOB,
    IPP_TAG_END,
    IPP_TAG_PRINTER,
    IPP_TAG_UNSUPPORTED_GROUP,
    IPP_TAG_SUBSCRIPTION,
    IPP_TAG_EVENT_NOTIFICATION,
    IPP_TAG_UNSUPPORTED_VALUE,
    IPP_TAG_DEFAULT,
    IPP_TAG_UNKNOWN,
    IPP_TAG_NOVALUE,
    IPP_TAG_NOTSETTABLE,
    IPP_TAG_DELETEATTR,
    IPP_TAG_ADMINDEFINE,
    IPP_TAG_INTEGER,
    IPP_TAG_BOOLEAN,
    IPP_TAG_ENUM,
    IPP_TAG_STRING,
    IPP_TAG_DATE,
    IPP_TAG_RESOLUTION,
    IPP_TAG_RANGE,
    IPP_TAG_BEGIN_COLLECTION,
    IPP_TAG_TEXTLANG,
    IPP_TAG_NAMELANG,
    IPP_TAG_END_COLLECTION,
    IPP_TAG_TEXT,
    IPP_TAG_NAME,
    IPP_TAG_KEYWORD,
    IPP_TAG_URI,
    IPP_TAG_URISCHEME,
    IPP_TAG_CHARSET,
    IPP_TAG_LANGUAGE,
    IPP_TAG_MIMETYPE,
    IPP_TAG_MEMBERNAME,
    IPP_TAG_MASK,
    IPP_TAG_COPY
} ipp_tag_t;
typedef enum ipp_res_e {
    IPP_RES_PER_INCH,
    IPP_RES_PER_CM
} ipp_res_t;
typedef enum ipp_finish_e {
    IPP_FINISHINGS_NONE,
    IPP_FINISHINGS_STAPLE,
    IPP_FINISHINGS_PUNCH,
    IPP_FINISHINGS_COVER,
    IPP_FINISHINGS_BIND,
    IPP_FINISHINGS_SADDLE_STITCH,
    IPP_FINISHINGS_EDGE_STITCH,
    IPP_FINISHINGS_FOLD,
    IPP_FINISHINGS_TRIM,
    IPP_FINISHINGS_BALE,
    IPP_FINISHINGS_BOOKLET_MAKER,
    IPP_FINISHINGS_JOB_OFFSET,
    IPP_FINISHINGS_STAPLE_TOP_LEFT,
    IPP_FINISHINGS_STAPLE_BOTTOM_LEFT,
    IPP_FINISHINGS_STAPLE_TOP_RIGHT,
    IPP_FINISHINGS_STAPLE_BOTTOM_RIGHT,
    IPP_FINISHINGS_EDGE_STITCH_LEFT,
    IPP_FINISHINGS_EDGE_STITCH_TOP,
    IPP_FINISHINGS_EDGE_STITCH_RIGHT,
    IPP_FINISHINGS_EDGE_STITCH_BOTTOM,
    IPP_FINISHINGS_STAPLE_DUAL_LEFT,
    IPP_FINISHINGS_STAPLE_DUAL_TOP,
    IPP_FINISHINGS_STAPLE_DUAL_RIGHT,
    IPP_FINISHINGS_STAPLE_DUAL_BOTTOM,
    IPP_FINISHINGS_BIND_LEFT,
    IPP_FINISHINGS_BIND_TOP,
    IPP_FINISHINGS_BIND_RIGHT,
    IPP_FINISHINGS_BIND_BOTTOM
} ipp_finish_t;
typedef enum ipp_orient_e {
    IPP_PORTRAIT,
    IPP_LANDSCAPE,
    IPP_REVERSE_LANDSCAPE,
    IPP_REVERSE_PORTRAIT
} ipp_orient_t;
typedef enum ipp_quality_e {
    IPP_QUALITY_DRAFT,
    IPP_QUALITY_NORMAL,
    IPP_QUALITY_HIGH
} ipp_quality_t;
typedef enum ipp_pstate_e {
    IPP_PRINTER_IDLE,
    IPP_PRINTER_PROCESSING,
    IPP_PRINTER_STOPPED
} ipp_pstate_t;
typedef enum ipp_state_e {
    IPP_ERROR,
    IPP_IDLE,
    IPP_HEADER,
    IPP_ATTRIBUTE,
    IPP_DATA
} ipp_state_t;
typedef enum ipp_op_e {
    IPP_PRINT_JOB,
    IPP_PRINT_URI,
    IPP_VALIDATE_JOB,
    IPP_CREATE_JOB,
    IPP_SEND_DOCUMENT,
    IPP_SEND_URI,
    IPP_CANCEL_JOB,
    IPP_GET_JOB_ATTRIBUTES,
    IPP_GET_JOBS,
    IPP_GET_PRINTER_ATTRIBUTES,
    IPP_HOLD_JOB,
    IPP_RELEASE_JOB,
    IPP_RESTART_JOB,
    IPP_PAUSE_PRINTER,
    IPP_RESUME_PRINTER,
    IPP_PURGE_JOBS,
    IPP_SET_PRINTER_ATTRIBUTES,
    IPP_SET_JOB_ATTRIBUTES,
    IPP_GET_PRINTER_SUPPORTED_VALUES,
    IPP_CREATE_PRINTER_SUBSCRIPTION,
    IPP_CREATE_JOB_SUBSCRIPTION,
    IPP_GET_SUBSCRIPTION_ATTRIBUTES,
    IPP_GET_SUBSCRIPTIONS,
    IPP_RENEW_SUBSCRIPTION,
    IPP_CANCEL_SUBSCRIPTION,
    IPP_GET_NOTIFICATIONS,
    IPP_SEND_NOTIFICATIONS,
    IPP_GET_PRINT_SUPPORT_FILES,
    IPP_ENABLE_PRINTER,
    IPP_DISABLE_PRINTER,
    IPP_PAUSE_PRINTER_AFTER_CURRENT_JOB,
    IPP_HOLD_NEW_JOBS,
    IPP_RELEASE_HELD_NEW_JOBS,
    IPP_DEACTIVATE_PRINTER,
    IPP_ACTIVATE_PRINTER,
    IPP_RESTART_PRINTER,
    IPP_SHUTDOWN_PRINTER,
    IPP_STARTUP_PRINTER,
    IPP_REPROCESS_JOB,
    IPP_CANCEL_CURRENT_JOB,
    IPP_SUSPEND_CURRENT_JOB,
    IPP_RESUME_JOB,
    IPP_PROMOTE_JOB,
    IPP_SCHEDULE_JOB_AFTER,
    IPP_PRIVATE,
    CUPS_GET_DEFAULT,
    CUPS_GET_PRINTERS,
    CUPS_ADD_MODIFY_PRINTER,
    CUPS_DELETE_PRINTER,
    CUPS_GET_CLASSES,
    CUPS_ADD_MODIFY_CLASS,
    CUPS_DELETE_CLASS,
    CUPS_ACCEPT_JOBS,
    CUPS_REJECT_JOBS,
    CUPS_SET_DEFAULT,
    CUPS_GET_DEVICES,
    CUPS_GET_PPDS,
    CUPS_MOVE_JOB,
    CUPS_AUTHENTICATE_JOB,
    CUPS_GET_PPD
} ipp_op_t;
typedef unsigned char ipp_uchar_t;
typedef ssize_t(*ipp_iocb_t) (void *, ipp_uchar_t *, size_t);
typedef union ipp_request_u {
    struct {
        ipp_uchar_t version[2];
        int op_status;
        int request_id;
    } any;
    struct {
        ipp_uchar_t version[2];
        ipp_op_t operation_id;
        int request_id;
    } op;
    struct {
        ipp_uchar_t version[2];
        ipp_status_t status_code;
        int request_id;
    } status;
    struct {
        ipp_uchar_t version[2];
        ipp_status_t status_code;
        int request_id;
    } event;
} ipp_request_t;
typedef struct ipp_s {
    ipp_state_t state;
    ipp_request_t request;
    ipp_attribute_t *attrs;
    ipp_attribute_t *last;
    ipp_attribute_t *current;
    ipp_tag_t curtag;
} ipp_t;
typedef union ipp_value_u {
    int integer;
    char boolean;
    ipp_uchar_t date[11];
    struct {
        int xres;
        int yres;
        ipp_res_t units;
    } resolution;
    struct {
        int lower;
        int upper;
    } range;
    struct {
        char *charset;
        char *text;
    } string;
    struct {
        int length;
        void *data;
    } unknown;
    ipp_t *collection;
} ipp_value_t;
typedef struct ipp_attribute_s {
    struct ipp_attribute_s *next;
    ipp_tag_t group_tag;
    ipp_tag_t value_tag;
    char *name;
    int num_values;
    ipp_value_t values[1];
} ipp_attribute_t;
extern ipp_attribute_t *ippAddBoolean(ipp_t * ipp, ipp_tag_t group,
                                      const char *name, char value);
extern ipp_attribute_t *ippAddBooleans(ipp_t * ipp, ipp_tag_t group,
                                       const char *name, int num_values,
                                       const char *values);
extern ipp_attribute_t *ippAddCollection(ipp_t * ipp, ipp_tag_t group,
                                         const char *name, ipp_t * value);
extern ipp_attribute_t *ippAddCollections(ipp_t * ipp, ipp_tag_t group,
                                          const char *name, int num_values,
                                          const ipp_t * *values);
extern ipp_attribute_t *ippAddDate(ipp_t * ipp, ipp_tag_t group,
                                   const char *name,
                                   const ipp_uchar_t * value);
extern ipp_attribute_t *ippAddInteger(ipp_t * ipp, ipp_tag_t group,
                                      ipp_tag_t type, const char *name,
                                      int value);
extern ipp_attribute_t *ippAddIntegers(ipp_t * ipp, ipp_tag_t group,
                                       ipp_tag_t type, const char *name,
                                       int num_values, const int *values);
extern ipp_attribute_t *ippAddRange(ipp_t * ipp, ipp_tag_t group,
                                    const char *name, int lower,
                                    int upper);
extern ipp_attribute_t *ippAddRanges(ipp_t * ipp, ipp_tag_t group,
                                     const char *name, int num_values,
                                     const int *lower, const int *upper);
extern ipp_attribute_t *ippAddResolution(ipp_t * ipp, ipp_tag_t group,
                                         const char *name, ipp_res_t units,
                                         int xres, int yres);
extern ipp_attribute_t *ippAddResolutions(ipp_t * ipp, ipp_tag_t group,
                                          const char *name, int num_values,
                                          ipp_res_t units, const int *xres,
                                          const int *yres);
extern ipp_attribute_t *ippAddSeparator(ipp_t * ipp);
extern ipp_attribute_t *ippAddString(ipp_t * ipp, ipp_tag_t group,
                                     ipp_tag_t type, const char *name,
                                     const char *charset,
                                     const char *value);
extern ipp_attribute_t *ippAddStrings(ipp_t * ipp, ipp_tag_t group,
                                      ipp_tag_t type, const char *name,
                                      int num_values, const char *charset,
                                      const char *const *values);
extern time_t ippDateToTime(const ipp_uchar_t * date);
extern void ippDelete(ipp_t * ipp);
extern void ippDeleteAttribute(ipp_t * ipp, ipp_attribute_t * attr);
extern const char *ippErrorString(ipp_status_t error);
extern ipp_attribute_t *ippFindAttribute(ipp_t * ipp, const char *name,
                                         ipp_tag_t type);
extern ipp_attribute_t *ippFindNextAttribute(ipp_t * ipp, const char *name,
                                             ipp_tag_t type);
extern size_t ippLength(ipp_t * ipp);
extern ipp_t *ippNew(void);
extern int ippPort(void);
extern ipp_state_t ippRead(http_t * http, ipp_t * ipp);
extern ipp_state_t ippReadFile(int fd, ipp_t * ipp);
extern ipp_state_t ippReadIO(void *src, ipp_iocb_t cb, int blocking,
                             ipp_t * parent, ipp_t * ipp);
extern void ippSetPort(int p);
extern const ipp_uchar_t *ippTimeToDate(time_t t);
extern ipp_state_t ippWrite(http_t * http, ipp_t * ipp);
extern ipp_state_t ippWriteFile(int fd, ipp_t * ipp);
extern ipp_state_t ippWriteIO(void *dst, ipp_iocb_t cb, int blocking,
                              ipp_t * parent, ipp_t * ipp);
7.2.4 cups/ppd.h

#define _CUPS_PPD_H_
#define PPD_MAX_LINE    256
#define PPD_VERSION     4.3
#define PPD_MAX_NAME    41
#define PPD_MAX_TEXT    81

typedef enum {
    PPD_CS_CMYK = -4,
    PPD_CS_CMY = -3,
    PPD_CS_GRAY = 1,
    PPD_CS_RGB = 3,
    PPD_CS_RGBK = 4,
    PPD_CS_N = 5
} ppd_cs_t;
typedef struct {
    char name[41];
    char *start;
    char *stop;
} ppd_emul_t;
typedef enum {
    PPD_UI_BOOLEAN = 0,
    PPD_UI_PICKONE = 1,
    PPD_UI_PICKMANY = 2
} ppd_ui_t;
typedef enum {
    PPD_ORDER_ANY = 0,
    PPD_ORDER_DOCUMENT = 1,
    PPD_ORDER_EXIT = 2,
    PPD_ORDER_JCL = 3,
    PPD_ORDER_PAGE = 4,
    PPD_ORDER_PROLOG = 5
} ppd_section_t;
typedef struct {
    char marked;
    char choice[41];
    char text[81];
    char *code;
    void *option;
} ppd_choice_t;
typedef struct {
    char conflicted;
    char keyword[41];
    char defchoice[41];
    char text[81];
    ppd_ui_t ui;
    ppd_section_t section;
    float order;
    int num_choices;
    ppd_choice_t *choices;
} ppd_option_t;
typedef struct ppd_group_str {
    char text[40];
    char name[41];
    int num_options;
    ppd_option_t *options;
    int num_subgroups;
    struct ppd_group_str *subgroups;
} ppd_group_t;
typedef struct {
    int marked;
    char name[41];
    float width;
    float length;
    float left;
    float bottom;
    float right;
    float top;
} ppd_size_t;
typedef struct {
    char option1[41];
    char choice1[41];
    char option2[41];
    char choice2[41];
} ppd_const_t;
typedef struct {
    char resolution[41];
    char media_type[41];
    float density;
    float gamma;
    float matrix[3][3];
} ppd_profile_t;
typedef struct {
    char name[41];
    char spec[41];
    char text[81];
    char *value;
} ppd_attr_t;
typedef struct {
    int language_level;
    int color_device;
    int variable_sizes;
    int accurate_screens;
    int contone_only;
    int landscape;
    int model_number;
    int manual_copies;
    int throughput;
    ppd_cs_t colorspace;
    char *patches;
    int num_emulations;
    ppd_emul_t *emulations;
    char *jcl_begin;
    char *jcl_ps;
    char *jcl_end;
    char *lang_encoding;
    char *lang_version;
    char *modelname;
    char *ttrasterizer;
    char *manufacturer;
    char *product;
    char *nickname;
    char *shortnickname;
    int num_groups;
    ppd_group_t *groups;
    int num_sizes;
    ppd_size_t *sizes;
    float custom_min[2];
    float custom_max[2];
    float custom_margins[4];
    int num_consts;
    ppd_const_t *consts;
    int num_fonts;
    char **fonts;
    int num_profiles;
    ppd_profile_t *profiles;
    int num_filters;
    char **filters;
    int flip_duplex;
    char *protocols;
    char *pcfilename;
    int num_attrs;
    int cur_attr;
    ppd_attr_t **attrs;
} ppd_file_t;
typedef enum {
    PPD_OK = 0,
    PPD_FILE_OPEN_ERROR = 1,
    PPD_NULL_FILE = 2,
    PPD_ALLOC_ERROR = 3,
    PPD_MISSING_PPDADOBE4 = 4,
    PPD_MISSING_VALUE = 5,
    PPD_INTERNAL_ERROR = 6,
    PPD_BAD_OPEN_GROUP = 7,
    PPD_NESTED_OPEN_GROUP = 8,
    PPD_BAD_OPEN_UI = 9,
    PPD_NESTED_OPEN_UI = 10,
    PPD_BAD_ORDER_DEPENDENCY = 11,
    PPD_BAD_UI_CONSTRAINTS = 12,
    PPD_MISSING_ASTERISK = 13,
    PPD_LINE_TOO_LONG = 14,
    PPD_ILLEGAL_CHARACTER = 15,
    PPD_ILLEGAL_MAIN_KEYWORD = 16,
    PPD_ILLEGAL_OPTION_KEYWORD = 17,
    PPD_ILLEGAL_TRANSLATION = 18,
    PPD_ILLEGAL_WHITESPACE = 19
} ppd_status_t;
typedef enum {
    PPD_CONFORM_RELAXED = 0,
    PPD_CONFORM_STRICT = 1
} ppd_conform_t;
extern void ppdClose(ppd_file_t * ppd);
extern int ppdCollect(ppd_file_t * ppd, ppd_section_t section,
                      ppd_choice_t * **choices);
extern int ppdConflicts(ppd_file_t * ppd);
extern int ppdEmit(ppd_file_t * ppd, FILE * fp, ppd_section_t section);
extern int ppdEmitFd(ppd_file_t * ppd, int fd, ppd_section_t section);
extern int ppdEmitJCL(ppd_file_t * ppd, FILE * fp, int job_id,
                      const char *user, const char *title);
extern const char *ppdErrorString(ppd_status_t status);
extern ppd_attr_t *ppdFindAttr(ppd_file_t * ppd, const char *name,
                               const char *spec);
extern ppd_choice_t *ppdFindChoice(ppd_option_t * o, const char *option);
extern ppd_choice_t *ppdFindMarkedChoice(ppd_file_t * ppd,
                                         const char *keyword);
extern ppd_attr_t *ppdFindNextAttr(ppd_file_t * ppd, const char *name,
                                   const char *spec);
extern ppd_option_t *ppdFindOption(ppd_file_t * ppd, const char *keyword);
extern int ppdIsMarked(ppd_file_t * ppd, const char *keyword,
                       const char *option);
extern ppd_status_t ppdLastError(int *line);
extern void ppdMarkDefaults(ppd_file_t * ppd);
extern int ppdMarkOption(ppd_file_t * ppd, const char *keyword,
                         const char *option);
extern ppd_file_t *ppdOpen(FILE * fp);
extern ppd_file_t *ppdOpenFd(int fd);
extern ppd_file_t *ppdOpenFile(const char *filename);
extern float ppdPageLength(ppd_file_t * ppd, const char *name);
extern ppd_size_t *ppdPageSize(ppd_file_t * ppd, const char *name);
extern float ppdPageWidth(ppd_file_t * ppd, const char *name);
extern void ppdSetConformance(ppd_conform_t c);
7.3 Interface Definitions for libcups
The interfaces defined on the following pages are included in libcups and are defined by this specification. Unless otherwise noted, these interfaces shall be included in the source standard.
Other interfaces listed in Section 7.1 shall behave as described in the referenced base document.
cupsAddDest
Name
cupsAddDest — Add a destination to the list of destinations.
Synopsis
#include <cups/cups.h>
int cupsAddDest(const char * name, const char * instance, int num_dests, cups_dest_t ** dests);
Description
Add a destination to the list of destinations.
This function cannot be used to add a new class or printer queue, it only adds a new container of saved options for the named destination or instance.
If the named destination already exists, the destination list is returned unchanged. Adding a new instance of a destination creates a copy of that destination's options.
Use the cupsSaveDests() function to save the updated list of destinations to the user's lpoptions file.
Return Value
New number of destinations
cupsAddOption
Name
cupsAddOption — Add an option to an option array.
Synopsis
#include <cups/cups.h>
int cupsAddOption(const char * name, const char * value, int num_options, cups_option_t ** options);
Description
Add an option to an option array.
Return Value
Number of options
cupsCancelJob
Name
cupsCancelJob — Cancel a print job on the default server.
Synopsis
#include <cups/cups.h>
int cupsCancelJob(const char * name, int job);
Description
Cancel a print job on the default server.
Use the cupsLastError() and cupsLastErrorString() functions to get the cause of any failure.
Return Value
1 on success, 0 on failure
cupsEncryption
Name
cupsEncryption — Get the default encryption settings.
Synopsis
#include <cups/cups.h>
http_encryption_t cupsEncryption(void);
Description
Get the default encryption settings.
The default encryption setting comes from the CUPS_ENCRYPTION environment variable, then the ~/.cupsrc file, and finally the /etc/cups/client.conf file. If not set, the default is HTTP_ENCRYPT_IF_REQUESTED.
Return Value
Encryption settings
cupsFreeDests
Name
cupsFreeDests — Free the memory used by the list of destinations.
Synopsis
#include <cups/cups.h>
void cupsFreeDests(int num_dests, cups_dest_t * dests);
Description
Free the memory used by the list of destinations.
Return Value
This function does not return a value.
cupsFreeJobs
Name
cupsFreeJobs — Free memory used by job data.
Synopsis
#include <cups/cups.h>
void cupsFreeJobs(int num_jobs, cups_job_t * jobs);
Description
Free memory used by job data.
Return Value
This function does not return a value.
cupsFreeOptions
Name
cupsFreeOptions — Free all memory used by options.
Synopsis
#include <cups/cups.h>
void cupsFreeOptions(int num_options, cups_option_t * options);
Description
Free all memory used by options.
Return Value
This function does not return a value.
cupsGetDefault
Name
cupsGetDefault — Get the default printer or class for the default server.
Synopsis
#include <cups/cups.h>
const char * cupsGetDefault(void);
Description
Get the default printer or class for the default server.
This function returns the default printer or class as defined by the LPDEST or PRINTER environment variables. If these environment variables are not set, the server default destination is returned. Applications should use the cupsGetDests() and cupsGetDest() functions to get the user-defined default printer, as this function does not support the lpoptions-defined default printer.
Return Value
Default printer or NULL
cupsGetDest
Name
cupsGetDest — Get the named destination from the list.
Synopsis
#include <cups/cups.h>
cups_dest_t * cupsGetDest(const char * name, const char * instance, int num_dests, cups_dest_t * dests);
Description
Get the named destination from the list.
Use the cupsGetDests() or cupsGetDests2() functions to get a list of supported destinations for the current user.
Return Value
Destination pointer or NULL
cupsGetDests
Name
cupsGetDests — Get the list of destinations from the default server.
Synopsis
#include <cups/cups.h>
int cupsGetDests(cups_dest_t ** dests);
Description
Get the list of destinations from the default server.
Starting with CUPS 1.2, the returned list of destinations include the printer-info, printer-is-accepting-jobs, printer-is-shared, printer-make-and-model, printer-state, printer-state-change-time, printer-state-reasons, and printer-type attributes as options.
Use the cupsFreeDests() function to free the destination list and the cupsGetDest() function to find a particular destination.
Return Value
Number of destinations
cupsGetJobs
Name
cupsGetJobs — Get the jobs from the default server.
Synopsis
#include <cups/cups.h>
int cupsGetJobs(cups_job_t ** jobs, const char * mydest, int myjobs, int completed);
Description
Get the jobs from the default server.
Return Value
Number of jobs
cupsGetOption
Name
cupsGetOption — Get an option value.
Synopsis
#include <cups/cups.h>
const char * cupsGetOption(const char * name, int num_options, cups_option_t * options);
Description
Get an option value.
Return Value
Option value or NULL
cupsGetPPD
Name
cupsGetPPD — Get the PPD file for a printer on the default server.
Synopsis
#include <cups/cups.h>
const char * cupsGetPPD(const char * name);
Description
Get the PPD file for a printer on the default server.
For classes, cupsGetPPD() returns the PPD file for the first printer in the class.
Return Value
Filename for PPD file
cupsGetPassword
Name
cupsGetPassword — Get a password from the user.
Synopsis
#include <cups/cups.h>
const char * cupsGetPassword(const char * prompt);
Description
Get a password from the user.
Uses the current password callback function. Returns NULL if the user does not provide a password.
Return Value
Password
cupsLangEncoding
Name
cupsLangEncoding — Return the character encoding (us-ascii, etc.)
Synopsis
#include <cups/cups.h>
const char * cupsLangEncoding(cups_lang_t * lang);
Description
Return the character encoding (us-ascii, etc.) for the given language.
Return Value
Character encoding
cupsLangFlush
Name
cupsLangFlush — Flush all language data out of the cache.
Synopsis
#include <cups/cups.h>
void cupsLangFlush(void);
Description
Flush all language data out of the cache.
Return Value
This function does not return a value.
cupsLangFree
Name
cupsLangFree — Free language data.
Synopsis
#include <cups/cups.h>
void cupsLangFree(cups_lang_t * lang);
Description
Free language data.
This does not actually free anything; use cupsLangFlush() for that.
Return Value
This function does not return a value.
cupsLangGet
Name
cupsLangGet — Get a language.
Synopsis
#include <cups/cups.h>
cups_lang_t * cupsLangGet(const char * language);
Description
Get a language.
Return Value
Language data
cupsLastError
Name
cupsLastError — Return the last IPP status code.
Synopsis
#include <cups/cups.h>
ipp_status_t cupsLastError(void);
Description
Return the last IPP status code.
Return Value
IPP status code from last request
cupsMarkOptions
Name
cupsMarkOptions — Mark command-line options in a PPD file.
Synopsis
#include <cups/cups.h>
int cupsMarkOptions(ppd_file_t * ppd, int num_options, cups_option_t * options);
Description
Mark command-line options in a PPD file.
Return Value
1 if conflicting
cupsParseOptions
Name
cupsParseOptions — Parse options from a command-line argument.
Synopsis
#include <cups/cups.h>
int cupsParseOptions(const char * arg, int num_options, cups_option_t ** options);
Description
Parse options from a command-line argument.
This function converts space-delimited name/value pairs according to the PAPI text option ABNF specification. Collection values ("name={a=... b=... c=...}") are stored with the curley brackets intact - use cupsParseOptions() on the value to extract the collection attributes.
Return Value
Number of options found
cupsPrintFile
Name
cupsPrintFile — Print a file to a printer or class on the default server.
Synopsis
#include <cups/cups.h>
int cupsPrintFile(const char * name, const char * filename, const char * title, int num_options, cups_option_t * options);
Description
Print a file to a printer or class on the default server.
Return Value
Job ID
cupsPrintFiles
Name
cupsPrintFiles — Print one or more files to a printer or class on the
Synopsis
#include <cups/cups.h>
int cupsPrintFiles(const char * name, int num_files, const char ** files, const char * title, int num_options, cups_option_t * options);
Description
Print one or more files to a printer or class on the default server.
Return Value
Job ID
cupsServer
Name
cupsServer — Return the hostname/address of the default server.
Synopsis
#include <cups/cups.h>
const char * cupsServer(void);
Description
Return the hostname/address of the default server.
The returned value can be a fully-qualified hostname, a numeric IPv4 or IPv6 address, or a domain socket pathname.
Return Value
Server name
cupsSetDests
Name
cupsSetDests — Save the list of destinations for the default server.
Synopsis
#include <cups/cups.h>
void cupsSetDests(int num_dests, cups_dest_t * dests);
Description
Save the list of destinations for the default server.
This function saves the destinations to /etc/cups/lpoptions when run as root and ~/.cups/lpoptions when run as a normal user.
Return Value
This function does not return a value.
cupsSetEncryption
Name
cupsSetEncryption — Set the encryption preference.
Synopsis
#include <cups/cups.h>
void cupsSetEncryption(http_encryption_t e);
Description
Set the encryption preference.
Return Value
This function does not return a value.
cupsSetPasswordCB
Name
cupsSetPasswordCB — Set the password callback for CUPS.
Synopsis
#include <cups/cups.h>
void cupsSetPasswordCB(cups_password_cb_t cb);
Description
Set the password callback for CUPS.
Pass NULL to restore the default (console) password callback.
Return Value
This function does not return a value.
cupsSetServer
Name
cupsSetServer — Set the default server name.
Synopsis
#include <cups/cups.h>
void cupsSetServer(const char * server);
Description
Set the default server name.
The "server" string can be a fully-qualified hostname, a numeric IPv4 or IPv6 address, or a domain socket pathname. Pass NULL to restore the default server name.
Return Value
This function does not return a value.
cupsSetUser
Name
cupsSetUser — Set the default user name.
Synopsis
#include <cups/cups.h>
void cupsSetUser(const char * user);
Description
Set the default user name.
Pass NULL to restore the default user name.
Return Value
This function does not return a value.
cupsTempFd
Name
cupsTempFd — Creates a temporary file.
Synopsis
#include <cups/cups.h>
int cupsTempFd(char * filename, int len);
Description
Creates a temporary file.
The temporary filename is returned in the filename buffer. The temporary file is opened for reading and writing.
Return Value
New file descriptor or -1 on error
cupsUser
Name
cupsUser — Return the current user's name.
Synopsis
#include <cups/cups.h>
const char * cupsUser(void);
Description
Return the current user's name.
Return Value
User name
ppdClose
Name
ppdClose — Free all memory used by the PPD file.
Synopsis
#include <cups/cups.h>
void ppdClose(ppd_file_t * ppd);
Description
Free all memory used by the PPD file.
Return Value
This function does not return a value.
ppdCollect
Name
ppdCollect — Collect all marked options that reside in the specified
Synopsis
#include <cups/cups.h>
int ppdCollect(ppd_file_t * ppd, ppd_section_t section, ppd_choice_t *** choices);
Description
Collect all marked options that reside in the specified section.
Return Value
Number of options marked
ppdConflicts
Name
ppdConflicts — Check to see if there are any conflicts.
Synopsis
#include <cups/cups.h>
int ppdConflicts(ppd_file_t * ppd);
Description
Check to see if there are any conflicts.
Return Value
Number of conflicts found
ppdEmit
Name
ppdEmit — Emit code for marked options to a file.
Synopsis
#include <cups/cups.h>
int ppdEmit(ppd_file_t * ppd, FILE * fp, ppd_section_t section);
Description
Emit code for marked options to a file.
Return Value
0 on success, -1 on failure
ppdEmitFd
Name
ppdEmitFd — Emit code for marked options to a file.
Synopsis
#include <cups/cups.h>
int ppdEmitFd(ppd_file_t * ppd, int fd, ppd_section_t section);
Description
Emit code for marked options to a file.
Return Value
0 on success, -1 on failure
ppdEmitJCL
Name
ppdEmitJCL — Emit code for JCL options to a file.
Synopsis
#include <cups/cups.h>
int ppdEmitJCL(ppd_file_t * ppd, FILE * fp, int job_id, const char * user, const char * title);
Description
Emit code for JCL options to a file.
Return Value
0 on success, -1 on failure
ppdErrorString
Name
ppdErrorString — Returns the text assocated with a status.
Synopsis
#include <cups/cups.h>
const char * ppdErrorString(ppd_status_t status);
Description
Returns the text assocated with a status.
Return Value
Status string
ppdFindAttr
Name
ppdFindAttr — Find the first matching attribute...
Synopsis
#include <cups/cups.h>
ppd_attr_t * ppdFindAttr(ppd_file_t * ppd, const char * name, const char * spec);
Description
Find the first matching attribute...
Return Value
Attribute or NULL if not found
ppdFindChoice
Name
ppdFindChoice — Return a pointer to an option choice.
Synopsis
#include <cups/cups.h>
ppd_choice_t * ppdFindChoice(ppd_option_t * o, const char * choice);
Description
Return a pointer to an option choice.
Return Value
Choice pointer or NULL
ppdFindMarkedChoice
Name
ppdFindMarkedChoice — Return the marked choice for the specified option.
Synopsis
#include <cups/cups.h>
ppd_choice_t * ppdFindMarkedChoice(ppd_file_t * ppd, const char * option);
Description
Return the marked choice for the specified option.
Return Value
Pointer to choice or NULL
ppdFindNextAttr
Name
ppdFindNextAttr — Find the next matching attribute...
Synopsis
#include <cups/cups.h>
ppd_attr_t * ppdFindNextAttr(ppd_file_t * ppd, const char * name, const char * spec);
Description
Find the next matching attribute...
Return Value
Attribute or NULL if not found
ppdFindOption
Name
ppdFindOption — Return a pointer to the specified option.
Synopsis
#include <cups/cups.h>
ppd_option_t * ppdFindOption(ppd_file_t * ppd, const char * option);
Description
Return a pointer to the specified option.
Return Value
Pointer to option or NULL
ppdIsMarked
Name
ppdIsMarked — Check to see if an option is marked...
Synopsis
#include <cups/cups.h>
int ppdIsMarked(ppd_file_t * ppd, const char * option, const char * choice);
Description
Check to see if an option is marked...
Return Value
Non-zero if option is marked
ppdLastError
Name
ppdLastError — Return the status from the last ppdOpen*().
Synopsis
#include <cups/cups.h>
ppd_status_t ppdLastError(int * line);
Description
Return the status from the last ppdOpen*().
Return Value
Status code
ppdMarkDefaults
Name
ppdMarkDefaults — Mark all default options in the PPD file.
Synopsis
#include <cups/cups.h>
void ppdMarkDefaults(ppd_file_t * ppd);
Description
Mark all default options in the PPD file.
Return Value
This function does not return a value.
ppdMarkOption
Name
ppdMarkOption — Mark an option in a PPD file.
Synopsis
#include <cups/cups.h>
int ppdMarkOption(ppd_file_t * ppd, const char * option, const char * choice);
Description
Mark an option in a PPD file.
Notes:
-1 is returned if the given option would conflict with any currently selected option.
Return Value
Number of conflicts
ppdOpen
Name
ppdOpen — Read a PPD file into memory.
Synopsis
#include <cups/cups.h>
ppd_file_t * ppdOpen(FILE * fp);
Description
Read a PPD file into memory.
Return Value
PPD file record
ppdOpenFd
Name
ppdOpenFd — Read a PPD file into memory.
Synopsis
#include <cups/cups.h>
ppd_file_t * ppdOpenFd(int fd);
Description
Read a PPD file into memory.
Return Value
PPD file record
ppdOpenFile
Name
ppdOpenFile — Read a PPD file into memory.
Synopsis
#include <cups/cups.h>
ppd_file_t * ppdOpenFile(const char * filename);
Description
Read a PPD file into memory.
Return Value
PPD file record
ppdPageLength
Name
ppdPageLength — Get the page length for the given size.
Synopsis
#include <cups/cups.h>
float ppdPageLength(ppd_file_t * ppd, const char * name);
Description
Get the page length for the given size.
Return Value
Length of page in points or 0.0
ppdPageSize
Name
ppdPageSize — Get the page size record for the given size.
Synopsis
#include <cups/cups.h>
ppd_size_t * ppdPageSize(ppd_file_t * ppd, const char * name);
Description
Get the page size record for the given size.
Return Value
Size record for page or NULL
ppdPageWidth
Name
ppdPageWidth — Get the page width for the given size.
Synopsis
#include <cups/cups.h>
float ppdPageWidth(ppd_file_t * ppd, const char * name);
Description
Get the page width for the given size.
Return Value
Width of page in points or 0.0
ppdSetConformance
Name
ppdSetConformance — Set the conformance level for PPD files.
Synopsis
#include <cups/cups.h>
void ppdSetConformance(ppd_conform_t c);
Description
Set the conformance level for PPD files.
Return Value
This function does not return a value.
7.4 Interfaces for libcupsimage
Table 7-4 defines the library name and shared object name for the libcupsimage library
Table 7-4 libcupsimage Definition
Library:	libcupsimage	
SONAME:	libcupsimage.so.2	

The behavior of the interfaces in this library is specified by the following specifications:
[LSB] This Specification	

7.4.1 CUPS Raster ABI
7.4.1.1 Interfaces for CUPS Raster ABI
An LSB conforming implementation shall provide the generic functions for CUPS Raster ABI specified in Table 7-5, with the full mandatory functionality as described in the referenced underlying specification.
Table 7-5 libcupsimage - CUPS Raster ABI Function Interfaces
cupsRasterClose [LSB]	cupsRasterOpen [LSB]	cupsRasterReadHeader [LSB]	cupsRasterReadPixels [LSB]	
cupsRasterWriteHeader [LSB]	cupsRasterWritePixels [LSB]	

An LSB conforming implementation shall provide the generic deprecated functions for CUPS Raster ABI specified in Table 7-6, with the full mandatory functionality as described in the referenced underlying specification.
Note: These interfaces are deprecated, and applications should avoid using them. These interfaces may be withdrawn in future releases of this specification.
Table 7-6 libcupsimage - CUPS Raster ABI Deprecated Function Interfaces
cupsRasterReadHeader [LSB]	cupsRasterWriteHeader [LSB]	

7.5 Data Definitions for libcupsimage
This section defines global identifiers and their values that are associated with interfaces contained in libcupsimage. These definitions are organized into groups that correspond to system headers. This convention is used as a convenience for the reader, and does not imply the existence of these headers, or their content. Where an interface is defined as requiring a particular system header file all of the data definitions for that system header file presented here shall be in effect.
This section gives data definitions to promote binary application portability, not to repeat source interface definitions available elsewhere. System providers and application developers should use this ABI to supplement - not to replace - source interface definition specifications.
This specification uses the ISO C (1999) C Language as the reference programming language, and data definitions are specified in ISO C format. The C language is used here as a convenient notation. Using a C language description of these data objects does not preclude their use by other programming languages.
7.5.1 cups/raster.h

#define _CUPS_RASTER_H_
#define CUPS_RASTER_SYNC        0x52615374
#define CUPS_RASTER_REVSYNC     0x74536152
#define CUPS_RASTER_HAVE_COLORIMETRIC   1

typedef enum {
    CUPS_RASTER_READ = 0,
    CUPS_RASTER_WRITE = 1
} cups_mode_t;
typedef struct _cups_raster_s cups_raster_t;
typedef enum {
    CUPS_ADVANCE_NONE = 0,
    CUPS_ADVANCE_FILE = 1,
    CUPS_ADVANCE_JOB = 2,
    CUPS_ADVANCE_SET = 3,
    CUPS_ADVANCE_PAGE = 4
} cups_adv_t;
typedef enum {
    CUPS_FALSE = 0,
    CUPS_TRUE = 1
} cups_bool_t;
typedef enum {
    CUPS_CUT_NONE = 0,
    CUPS_CUT_FILE = 1,
    CUPS_CUT_JOB = 2,
    CUPS_CUT_SET = 3,
    CUPS_CUT_PAGE = 4
} cups_cut_t;
typedef enum {
    CUPS_JOG_NONE = 0,
    CUPS_JOG_FILE = 1,
    CUPS_JOG_JOB = 2,
    CUPS_JOG_SET = 3
} cups_jog_t;
typedef enum {
    CUPS_EDGE_TOP = 0,
    CUPS_EDGE_RIGHT = 1,
    CUPS_EDGE_BOTTOM = 2,
    CUPS_EDGE_LEFT = 3
} cups_edge_t;
typedef enum {
    CUPS_ORIENT_0 = 0,
    CUPS_ORIENT_90 = 1,
    CUPS_ORIENT_180 = 2,
    CUPS_ORIENT_270 = 3
} cups_orient_t;
typedef enum {
    CUPS_ORDER_CHUNKED = 0,
    CUPS_ORDER_BANDED = 1,
    CUPS_ORDER_PLANAR = 2
} cups_order_t;
typedef enum {
    CUPS_CSPACE_W = 0,
    CUPS_CSPACE_RGB = 1,
    CUPS_CSPACE_RGBA = 2,
    CUPS_CSPACE_K = 3,
    CUPS_CSPACE_CMY = 4,
    CUPS_CSPACE_YMC = 5,
    CUPS_CSPACE_CMYK = 6,
    CUPS_CSPACE_YMCK = 7,
    CUPS_CSPACE_KCMY = 8,
    CUPS_CSPACE_KCMYcm = 9,
    CUPS_CSPACE_GMCK = 10,
    CUPS_CSPACE_GMCS = 11,
    CUPS_CSPACE_WHITE = 12,
    CUPS_CSPACE_GOLD = 13,
    CUPS_CSPACE_SILVER = 14,
    CUPS_CSPACE_CIEXYZ = 15,
    CUPS_CSPACE_CIELab = 16,
    CUPS_CSPACE_ICC1 = 32,
    CUPS_CSPACE_ICC2 = 33,
    CUPS_CSPACE_ICC3 = 34,
    CUPS_CSPACE_ICC4 = 35,
    CUPS_CSPACE_ICC5 = 36,
    CUPS_CSPACE_ICC6 = 37,
    CUPS_CSPACE_ICC7 = 38,
    CUPS_CSPACE_ICC8 = 39,
    CUPS_CSPACE_ICC9 = 40,
    CUPS_CSPACE_ICCA = 41,
    CUPS_CSPACE_ICCB = 42,
    CUPS_CSPACE_ICCC = 43,
    CUPS_CSPACE_ICCD = 44,
    CUPS_CSPACE_ICCE = 45,
    CUPS_CSPACE_ICCF = 46
} cups_cspace_t;
typedef struct {
    char MediaClass[64];
    char MediaColor[64];
    char MediaType[64];
    char OutputType[64];
    unsigned int AdvanceDistance;
    cups_adv_t AdvanceMedia;
    cups_bool_t Collate;
    cups_cut_t CutMedia;
    cups_bool_t Duplex;
    unsigned int HWResolution[2];
    unsigned int ImagingBoundingBox[4];
    cups_bool_t InsertSheet;
    cups_jog_t Jog;
    cups_edge_t LeadingEdge;
    unsigned int Margins[2];
    cups_bool_t ManualFeed;
    unsigned int MediaPosition;
    unsigned int MediaWeight;
    cups_bool_t MirrorPrint;
    cups_bool_t NegativePrint;
    unsigned int NumCopies;
    cups_orient_t Orientation;
    cups_bool_t OutputFaceUp;
    unsigned int PageSize[2];
    cups_bool_t Separations;
    cups_bool_t TraySwitch;
    cups_bool_t Tumble;
    unsigned int cupsWidth;
    unsigned int cupsHeight;
    unsigned int cupsMediaType;
    unsigned int cupsBitsPerColor;
    unsigned int cupsBitsPerPixel;
    unsigned int cupsBytesPerLine;
    cups_order_t cupsColorOrder;
    cups_cspace_t cupsColorSpace;
    unsigned int cupsCompression;
    unsigned int cupsRowCount;
    unsigned int cupsRowFeed;
    unsigned int cupsRowStep;
} cups_page_header_t;
typedef struct cups_page_header2_s {
    char MediaClass[64];
    char MediaColor[64];
    char MediaType[64];
    char OutputType[64];
    unsigned int AdvanceDistance;
    cups_adv_t AdvanceMedia;
    cups_bool_t Collate;
    cups_cut_t CutMedia;
    cups_bool_t Duplex;
    unsigned int HWResolution[3];
    unsigned int ImagingBoundingBox[4];
    cups_bool_t InsertSheet;
    cups_jog_t Jog;
    cups_edge_t LeadingEdge;
    unsigned int Margins[3];
    cups_bool_t ManualFeed;
    unsigned int MediaPosition;
    unsigned int MediaWeight;
    cups_bool_t MirrorPrint;
    cups_bool_t NegativePrint;
    unsigned int NumCopies;
    cups_orient_t Orientation;
    cups_bool_t OutputFaceUp;
    unsigned int PageSize[3];
    cups_bool_t Separations;
    cups_bool_t TraySwitch;
    cups_bool_t Tumble;
    unsigned int cupsWidth;
    unsigned int cupsHeight;
    unsigned int cupsMediaType;
    unsigned int cupsBitsPerColor;
    unsigned int cupsBitsPerPixel;
    unsigned int cupsBytesPerLine;
    cups_order_t cupsColorOrder;
    cups_cspace_t cupsColorSpace;
    unsigned int cupsCompression;
    unsigned int cupsRowCount;
    unsigned int cupsRowFeed;
    unsigned int cupsRowStep;
    unsigned int cupsNumColors;
    float cupsBorderlessScalingFactor;
    float cupsPageSize[2];
    float cupsImagingBBox[4];
    unsigned int cupsInteger[16];
    float cupsReal[16];
    char cupsString[16][64];
    char cupsMarkerType[64];
    char cupsRenderingIntent[64];
    char cupsPageSizeName[64];
} cups_page_header2_t;
typedef int (*cups_interpret_cb_t) (cups_page_header2_t *, int);
extern void cupsRasterClose(cups_raster_t * r);
extern cups_raster_t *cupsRasterOpen(int fd, cups_mode_t mode);
extern unsigned int cupsRasterReadHeader(cups_raster_t * r,
                                         cups_page_header_t * h);
extern unsigned int cupsRasterReadHeader2(cups_raster_t * r,
                                          cups_page_header2_t * h);
extern unsigned int cupsRasterReadPixels(cups_raster_t * r,
                                         unsigned char *p,
                                         unsigned int len);
extern unsigned int cupsRasterWriteHeader(cups_raster_t * r,
                                          cups_page_header_t * h);
extern unsigned int cupsRasterWriteHeader2(cups_raster_t * r,
                                           cups_page_header2_t * h);
extern unsigned int cupsRasterWritePixels(cups_raster_t * r,
                                          unsigned char *p,
                                          unsigned int len);
7.6 Interface Definitions for libcupsimage
The interfaces defined on the following pages are included in libcupsimage and are defined by this specification. Unless otherwise noted, these interfaces shall be included in the source standard.
Other interfaces listed in Section 7.4 shall behave as described in the referenced base document.
cupsRasterClose
Name
cupsRasterClose — Close a raster stream.
Synopsis
#include <cups/raster.h>
void cupsRasterClose(cups_raster_t * r);
Description
Close a raster stream.
Return Value
This function does not return a value.
cupsRasterOpen
Name
cupsRasterOpen — Open a raster stream.
Synopsis
#include <cups/raster.h>
cups_raster_t * cupsRasterOpen(int fd, cups_mode_t mode);
Description
Open a raster stream.
Return Value
New stream
cupsRasterReadHeader
Name
cupsRasterReadHeader — Read a raster page header and store it in a
Synopsis
#include <cups/raster.h>
unsigned cupsRasterReadHeader(cups_raster_t * r, cups_page_header_t * h);
Description
Read a raster page header and store it in a V1 page header structure.
Return Value
1 on success, 0 on fail
cupsRasterReadPixels
Name
cupsRasterReadPixels — Read raster pixels.
Synopsis
#include <cups/raster.h>
unsigned cupsRasterReadPixels(cups_raster_t * r, unsigned char * p, unsigned len);
Description
Read raster pixels.
Return Value
Number of bytes read
cupsRasterWriteHeader
Name
cupsRasterWriteHeader — Write a raster page header from a V1 page
Synopsis
#include <cups/raster.h>
unsigned cupsRasterWriteHeader(cups_raster_t * r, cups_page_header_t * h);
Description
Write a raster page header from a V1 page header structure.
Return Value
1 on success, 0 on failure
cupsRasterWritePixels
Name
cupsRasterWritePixels — Write raster pixels.
Synopsis
#include <cups/raster.h>
unsigned cupsRasterWritePixels(cups_raster_t * r, unsigned char * p, unsigned len);
Description
Write raster pixels.
Return Value
Number of bytes written

III Printing Commands

8 Printing Commands
8.1 Commands and Utilities
An LSB conforming implementation shall provide the commands and utilities as described in Table 8-1, with at least the behavior described as mandatory in the referenced underlying specification, with the following exceptions: 
	1.	If any operand (except one which follows --) starts with a hyphen, the behavior is unspecified. 
Rationale (Informative): Applications should place options before operands, or use --, as needed. This text is needed because, by default, GNU option parsing differs from POSIX, unless the environment variable POSIXLY_CORRECT is set. For example, ls . -a in GNU ls means to list the current directory, showing all files (that is, "." is an operand and -a is an option). In POSIX, "." and -a are both operands, and the command means to list the current directory, and also the file named -a. Suggesting that applications rely on the setting of the POSIXLY_CORRECT environment variable, or try to set it, seems worse than just asking the applications to invoke commands in ways which work with either the POSIX or GNU behaviors.
Table 8-1 Commands And Utilities
foomatic-rip [1]	gs [1]	

	

Referenced Specification(s)
[1]. This Specification
8.2 Command Behavior
This section contains descriptions for commands and utilities whose specified behavior in the LSB contradicts or extends the standards referenced. It also contains commands and utilities only required by the LSB and not specified by other standards.
foomatic-rip
2002-11-26
Name
foomatic-rip — Universal print filter/RIP wrapper
SYNOPSIS
Standalone Mode
foomatic-rip [-v] [-q] [-d] [ --ppd ppdfile ] [ -J jobtitle ] [ -o option=value [...] ] [ files ]
CUPS Mode
foomatic-rip jobid user jobtitle numcopies options [file]
DESCRIPTION
foomatic-rip is a universal print filter which works with every known free software printer spooler.
This page describes the facilities of foomatic-rip when used as a CUPS filter and when used outside of a print system. While implementations of foomatic-rip may support other print systems, such use is not documented here.
When run as a CUPS filter, foomatic-rip reads the job from the specified file, or from standard input if no file is specified. It renders the file into a printer-specific format, and writes the result to standard output.
When run standalone, foomatic-rip will read the job from the specified files, or from standard input if no files are given. The files are rendered into a printer-specific format, which is then output according to the PPD option "FoomaticRIPPostPipe", documented in the LSB.
Printer capabilities are described to foomatic-rip via PPD files, as described (with extensions used by foomatic-rip) in the LSB. The method foomatic-rip uses to determine the proper PPD file for the printer in question is defined by the implementation of both the spooler and foomatic-rip.
CUPS OPTIONS
Unless otherwise noted, all parameters are required when running foomatic-rip as a CUPS filter.
jobid
 	The internal Job ID from CUPS.
username
 	The username of the user who submitted the job.
jobtitle
 	The job's title, as submitted by the user.
numcopies
 	The number of copies of the job requested.
options
 	A series of printer options, separated by spaces, each of which take the form name or name=value. The specific list of options supported is dependent on the printer and spooler, and is usually documented in the PPD file for the printer.
An option may be preceded by a page specification, describing the pages to which the option should apply. A page specification consists of one or more items, separated by commas, and separated from the option name by a colon. Valid items include the words "even" and "odd", a single page number, and a page range. Page ranges are described with a starting page, a dash ("-"), and an ending page. If omitted, the starting and ending pages are the first and last page, respectively, but only one of the ends of the range may be omitted.
file
 	The full path to the file containing the job. This parameter is optional; if it is not supplied, the job is read from standard input.
SPOOLER-LESS OPTIONS
-v
 	Verbose mode. Intended for debugging and testing purposes only.
-q
 	Quiet mode - minimal information output.
-d
 	Identical to the 'opts' option, but option information is left in text format. The PPD file will need to be specified using the --ppd option.
--ppd ppdfile
 	The PPD file ppdfile should be applied for processing this job.
-J jobtitle
 	Print the given job title in the header of every page of a plain text job.
-o option=value
 	Set an option setting for this job.
EXIT STATUS
foomatic-rip returns 0 unless something unexpected happens.
AUTHOR
Till Kamppeter <till.kamppeter@gmail.com> with parts of Manfred Wassmanns's <manolo@NCC-1701.B.Shuttle.de> man pages for the Foomatic 2.0.x filters.
Jeff Licquia <licquia@linux-foundation.org> adapted the original man page for the LSB.
gs
2007-11-29
Name
gs — GhostScript (PostScript and PDF language interpreter)
SYNOPSIS
gs -h | --help
gs [ options ] ps-file [ [ options ] ps-file2 ] ...
DESCRIPTION
The gs command invokes Ghostscript, an interpreter of Adobe Systems' PostScript(tm) and Portable Document Format (PDF) languages. gs reads the files named by ps-file in sequence and executes them as Ghostscript programs. After doing this, it reads further input from the standard input stream (normally the keyboard), interpreting each line separately. The interpreter exits gracefully when it encounters the "quit" command (either in a file or from the keyboard), at end-of-file, or at an interrupt signal (such as Control-C at the keyboard).
Some of GhostScript's options are set via command-line options; others are set as processing parameters, each of which consists of a name and a value.
OPTIONS
-h --help
 	Show GhostScript's help, as well as lists of the supported input formats, supported devices, and the search path for gs components.
-q
 	Suppress normal startup messages, and also set the processing parameter QUIET.
-c
 	Begin interpreting arguments as PostScript code. All following arguments are sent to the interpreter up to the next argument beginning with "-" followed by a non-digit, or with "@". This code is interpolated with the file list, so files specified before -c are interpreted beforehand, and files after -c are interpreted afterwards.
-f
 	Specifies a PostScript file to run as its argument. This is equivalent to the ps-file arguments, but is useful for terminating PostScript code as passed via -c.
-d -D
 	Set a processing parameter. The "name=value" pair follows immediately after the option, as in "-Dfoo=bar". The values here must be integers or the values "true" or "false". The equals sign and value may be omitted; this is assumed to set the name to "true".
-s -S
 	Set a processing parameter to a string value. The "name=value" pair follows immediately after the option, as in "-Sfoo=bar".
-u
 	Unset a processing parameter. The name to be unset follows immediately after the option, as in "-ufoo".
-o
 	Write rendered output to the named file, and also inhibit pauses and the interactive shell. This is equivalent to setting the processing parameters BATCH and NOPAUSE to true, and OutputFile to the parameter after -o.
-r
 	Set the device resolution. The resolution is specified as two numbers separated with an "x", as in "300x150", corresponding to the X and Y axis resolutions, respectively. If a single number is given without an "x", it is treated as the value for both resolutions.
This is equivalent to setting DEVICEXRESOLUTION and DEVICEYRESOLUTION in systemdict.
-g
 	Set the device size, in pixels. The size is specified as two numbers separated with an "x", as in "640x480", corresponding to the width and height, respectively.
This is equivalent to setting DEVICEWIDTH and DEVICEHEIGHT in systemdict.
RECOGNIZED PROCESSING PARAMETERS
Processing parameters may have arbitrary names; no limits are placed on the settings that may be made. However, certain settings have meaning to the gs interpreter, and drivers may use other settings. Below is a list of recognized settings that the gs interpreter must respect.
BATCH
 	If set to true, do not enter an interactive shell after processing all command-line files.
DEVICE
 	Contains the name of the device used to render the page, as a string.
The list of available devices can be discovered with the -h parameter, as described above. At least the following devices must be present: cups (CUPS Raster), ijs, pxlmono, pxlcolor, and opvp (OpenPrinting Vector).
DEVICEHEIGHT
 	Contains the height, in pixels, of the output device.
The effect of this setting when the current driver is a vector driver is undefined.
DEVICEHEIGHTPOINTS
 	Sets the initial page height, in units of 1/72 of an inch.
DEVICEWIDTH
 	Contains the width, in pixels, of the output device.
The effect of this setting when the current driver is a vector driver is undefined.
DEVICEWIDTHPOINTS
 	Sets the initial page width, in units of 1/72 of an inch.
DEVICEXRESOLUTION
 	Contains the resolution, in pixels per inch, of the X dimension (horizontal) of the output device.
DEVICEYRESOLUTION
 	Contains the resolution, in pixels per inch, of the Y dimension (vertical) of the output device.
NOPAUSE
 	If set to true, disable the prompt and pause normally displayed after rendering a page.
OutputFile
 	Contains the path to the file to which gs should write its output, as a string. This parameter may be set to '-', in which case gs's output is sent to standard output.
PAPERSIZE
 	Contains the string representation of the paper size. The ISO paper sizes a0-a10 (plus a4small), isob0-isob6, and c0-c6 are recognized, as are jisb0-jisb6 (JIS standard sizes) and the US paper sizes 11x17, ledger, legal, letter, lettersmall, and archA-archE.
QUIET
 	If set to true, suppress routine information comments on standard output.
SAFER
 	If set to true, disable several unsafe PostScript features: the deletefile and renamefile operators, piped commands, reading or writing to general files, and changing of certain system settings.
STRICT
 	If set to true, disable as many extensions to the Adobe PostScript specification as possible.
EXIT STATUS
gs returns 0 on successful execution. Any other return value indicates an error.
AUTHOR
Jeff Licquia (licquia@linux-foundation.org) wrote this man page for the LSB specification.
Portions of this page were taken from the GhostScript documentation. The maintainer and rights holder for GhostScript is Artifex Software, Inc.

IV Execution Environment

9 File System Hierarchy
In addition to the requirements for /usr/share in the Filesystem Hierarchy Standard, an LSB conforming system shall also provide the following directories or symbolic links to directories: 
/usr/share/ppd
 	PostScript Printer Description (ppd) files

V Scanning Libraries

10 Libraries
10.1 Interfaces for libsane
Table 10-1 defines the library name and shared object name for the libsane library
Table 10-1 libsane Definition
Library:	libsane	
SONAME:	libsane.so.1	

The behavior of the interfaces in this library is specified by the following specifications:
[SANE] SANE Standard Version 1.04	

10.1.1 libsane interfaces
10.1.1.1 Interfaces for libsane interfaces
An LSB conforming implementation shall provide the generic functions for libsane interfaces specified in Table 10-2, with the full mandatory functionality as described in the referenced underlying specification.
Table 10-2 libsane - libsane interfaces Function Interfaces
sane_cancel [SANE]	sane_close [SANE]	sane_control_option [SANE]	sane_exit [SANE]	
sane_get_devices [SANE]	sane_get_option_descriptor [SANE]	sane_get_parameters [SANE]	sane_get_select_fd [SANE]	
sane_init [SANE]	sane_open [SANE]	sane_read [SANE]	sane_set_io_mode [SANE]	
sane_start [SANE]	sane_strstatus [SANE]	

10.2 Data Definitions for libsane
This section defines global identifiers and their values that are associated with interfaces contained in libsane. These definitions are organized into groups that correspond to system headers. This convention is used as a convenience for the reader, and does not imply the existence of these headers, or their content. Where an interface is defined as requiring a particular system header file all of the data definitions for that system header file presented here shall be in effect.
This section gives data definitions to promote binary application portability, not to repeat source interface definitions available elsewhere. System providers and application developers should use this ABI to supplement - not to replace - source interface definition specifications.
This specification uses the ISO C (1999) C Language as the reference programming language, and data definitions are specified in ISO C format. The C language is used here as a convenient notation. Using a C language description of these data objects does not preclude their use by other programming languages.
10.2.1 sane/sane.h

#define sane_h
#define SANE_VERSION_CODE(major,minor,build)    ( (((SANE_Word) (major) & 0xff) << 24) | (((SANE_Word) (minor) & 0xff) << 16) | (((SANE_Word) (build) & 0xffff) << 0))
#define SANE_VERSION_BUILD(code)        ((((SANE_Word)(code)) >> 0) & 0xffff)
#define SANE_VERSION_MINOR(code)        ((((SANE_Word)(code)) >> 16) & 0xff)
#define SANE_VERSION_MAJOR(code)        ((((SANE_Word)(code)) >> 24) & 0xff)
#define SANE_OPTION_IS_ACTIVE(cap)      (((cap) & SANE_CAP_INACTIVE) == 0)
#define SANE_OPTION_IS_SETTABLE(cap)    (((cap) & SANE_CAP_SOFT_SELECT) != 0)
#define SANE_UNFIX(v)   ((double)(v) / (1 << SANE_FIXED_SCALE_SHIFT))
#define SANE_FIX(v)     ((SANE_Word) ((v) * (1 << SANE_FIXED_SCALE_SHIFT)))
#define SANE_CAP_SOFT_SELECT    (1 << 0)
#define SANE_INFO_INEXACT       (1 << 0)
#define SANE_CAP_HARD_SELECT    (1 << 1)
#define SANE_INFO_RELOAD_OPTIONS        (1 << 1)
#define SANE_CAP_SOFT_DETECT    (1 << 2)
#define SANE_INFO_RELOAD_PARAMS (1 << 2)
#define SANE_CAP_EMULATED       (1 << 3)
#define SANE_CAP_AUTOMATIC      (1 << 4)
#define SANE_CAP_INACTIVE       (1 << 5)
#define SANE_CAP_ADVANCED       (1 << 6)
#define SANE_CURRENT_MINOR      0
#define SANE_FALSE      0
#define SANE_CURRENT_MAJOR      1
#define SANE_TRUE       1
#define SANE_MAX_PASSWORD_LEN   128
#define SANE_MAX_USERNAME_LEN   128
#define SANE_FIXED_SCALE_SHIFT  16

typedef unsigned char SANE_Byte;
typedef int SANE_Word;
typedef int SANE_Bool;
typedef int SANE_Int;
typedef char SANE_Char;
typedef SANE_Char *SANE_String;
typedef const SANE_Char *SANE_String_Const;
typedef void *SANE_Handle;
typedef int SANE_Fixed;
typedef enum {
    SANE_STATUS_GOOD,
    SANE_STATUS_UNSUPPORTED,
    SANE_STATUS_CANCELLED,
    SANE_STATUS_DEVICE_BUSY,
    SANE_STATUS_INVAL,
    SANE_STATUS_EOF,
    SANE_STATUS_JAMMED,
    SANE_STATUS_NO_DOCS,
    SANE_STATUS_COVER_OPEN,
    SANE_STATUS_IO_ERROR,
    SANE_STATUS_NO_MEM,
    SANE_STATUS_ACCESS_DENIED
} SANE_Status;
typedef enum {
    SANE_TYPE_BOOL,
    SANE_TYPE_INT,
    SANE_TYPE_FIXED,
    SANE_TYPE_STRING,
    SANE_TYPE_BUTTON,
    SANE_TYPE_GROUP
} SANE_Value_Type;
typedef enum {
    SANE_UNIT_NONE,
    SANE_UNIT_PIXEL,
    SANE_UNIT_BIT,
    SANE_UNIT_MM,
    SANE_UNIT_DPI,
    SANE_UNIT_PERCENT,
    SANE_UNIT_MICROSECOND
} SANE_Unit;
typedef struct {
    SANE_String_Const name;
    SANE_String_Const vendor;
    SANE_String_Const model;
    SANE_String_Const type;
} SANE_Device;
typedef enum {
    SANE_CONSTRAINT_NONE,
    SANE_CONSTRAINT_RANGE,
    SANE_CONSTRAINT_WORD_LIST,
    SANE_CONSTRAINT_STRING_LIST
} SANE_Constraint_Type;
typedef struct {
    SANE_Word min;
    SANE_Word max;
    SANE_Word quant;
} SANE_Range;
typedef struct {
    SANE_String_Const name;
    SANE_String_Const title;
    SANE_String_Const desc;
    SANE_Value_Type type;
    SANE_Unit unit;
    SANE_Int size;
    SANE_Int cap;
    SANE_Constraint_Type constraint_type;
    union {
        const SANE_String_Const *string_list;
        const SANE_Word *word_list;
        const SANE_Range *range;
    } constraint;
} SANE_Option_Descriptor;
typedef enum {
    SANE_ACTION_GET_VALUE,
    SANE_ACTION_SET_VALUE,
    SANE_ACTION_SET_AUTO
} SANE_Action;
typedef enum {
    SANE_FRAME_GRAY,
    SANE_FRAME_RGB,
    SANE_FRAME_RED,
    SANE_FRAME_GREEN,
    SANE_FRAME_BLUE
} SANE_Frame;
typedef struct {
    SANE_Frame format;
    SANE_Bool last_frame;
    SANE_Int bytes_per_line;
    SANE_Int pixels_per_line;
    SANE_Int lines;
    SANE_Int depth;
} SANE_Parameters;
typedef void (*SANE_Auth_Callback) (SANE_String_Const, SANE_Char *,
                                    SANE_Char *);
extern void sane_cancel(SANE_Handle handle);
extern void sane_close(SANE_Handle handle);
extern SANE_Status sane_control_option(SANE_Handle handle, SANE_Int option,
                                       SANE_Action action, void *value,
                                       SANE_Int * info);
extern void sane_exit(void);
extern SANE_Status sane_get_devices(const SANE_Device * **device_list,
                                    SANE_Bool local_only);
extern const SANE_Option_Descriptor *sane_get_option_descriptor(SANE_Handle
                                                                handle,
                                                                SANE_Int
                                                                option);
extern SANE_Status sane_get_parameters(SANE_Handle handle,
                                       SANE_Parameters * params);
extern SANE_Status sane_get_select_fd(SANE_Handle handle, SANE_Int * fd);
extern SANE_Status sane_init(SANE_Int * version_code,
                             SANE_Auth_Callback authorize);
extern SANE_Status sane_open(SANE_String_Const devicename,
                             SANE_Handle * handle);
extern SANE_Status sane_read(SANE_Handle handle, SANE_Byte * data,
                             SANE_Int max_length, SANE_Int * length);
extern SANE_Status sane_set_io_mode(SANE_Handle handle,
                                    SANE_Bool non_blocking);
extern SANE_Status sane_start(SANE_Handle handle);
extern SANE_String_Const sane_strstatus(SANE_Status status);
10.2.2 sane/saneopts.h

#define SANE_NAME_NUM_OPTIONS   ""
#define saneopts_h
#define SANE_NAME_ADVANCED      "advanced"
#define SANE_NAME_ANALOG_GAMMA  "analog-gamma"
#define SANE_NAME_ANALOG_GAMMA_B        "analog-gamma-b"
#define SANE_NAME_ANALOG_GAMMA_BIND     "analog-gamma-bind"
#define SANE_NAME_ANALOG_GAMMA_G        "analog-gamma-g"
#define SANE_NAME_ANALOG_GAMMA_R        "analog-gamma-r"
#define SANE_NAME_BACKTRACK     "backtrack"
#define SANE_NAME_BLACK_LEVEL   "black-level"
#define SANE_NAME_GAMMA_VECTOR_B        "blue-gamma-table"
#define SANE_NAME_SCAN_BR_X     "br-x"
#define SANE_NAME_SCAN_BR_Y     "br-y"
#define SANE_NAME_BRIGHTNESS    "brightness"
#define SANE_NAME_CAL_EXPOS_TIME        "cal-exposure-time"
#define SANE_NAME_CAL_EXPOS_TIME_B      "cal-exposure-time-b"
#define SANE_NAME_CAL_EXPOS_TIME_G      "cal-exposure-time-g"
#define SANE_NAME_CAL_EXPOS_TIME_R      "cal-exposure-time-r"
#define SANE_NAME_CAL_LAMP_DEN  "cal-lamp-density"
#define SANE_NAME_CANCEL        "cancel"
#define SANE_TITLE_CANCEL       "Cancel button"
#define SANE_NAME_CONTRAST      "contrast"
#define SANE_NAME_COPY  "copy"
#define SANE_TITLE_COPY "Copy button"
#define SANE_TITLE_COVER_OPEN   "Cover open"
#define SANE_NAME_COVER_OPEN    "cover-open"
#define SANE_NAME_CUSTOM_GAMMA  "custom-gamma"
#define SANE_NAME_BIT_DEPTH     "depth"
#define SANE_NAME_DOR   "double-res"
#define SANE_NAME_EMAIL "email"
#define SANE_TITLE_EMAIL        "Email button"
#define SANE_NAME_ENHANCEMENT   "enhancement"
#define SANE_NAME_FAX   "fax"
#define SANE_TITLE_FAX  "Fax button"
#define SANE_NAME_FILE  "filename"
#define SANE_NAME_GAMMA_VECTOR  "gamma-table"
#define SANE_NAME_GEOMETRY      "geometry"
#define SANE_NAME_GRAIN_SIZE    "grain"
#define SANE_NAME_GAMMA_VECTOR_G        "green-gamma-table"
#define SANE_NAME_HALFTONE_PATTERN      "halftone-pattern"
#define SANE_NAME_HALFTONE_DIMENSION    "halftone-size"
#define SANE_NAME_HALFTONE      "halftoning"
#define SANE_NAME_HIGHLIGHT     "highlight"
#define SANE_NAME_HIGHLIGHT_B   "highlight-b"
#define SANE_NAME_HIGHLIGHT_G   "highlight-g"
#define SANE_NAME_HIGHLIGHT_R   "highlight-r"
#define SANE_NAME_HUE   "hue"
#define SANE_NAME_LAMP_OFF_AT_EXIT      "lamp-off-at-exit"
#define SANE_NAME_SCAN_MODE     "mode"
#define SANE_NAME_NEGATIVE      "negative"
#define SANE_TITLE_PAGE_LOADED  "Page loaded"
#define SANE_NAME_PAGE_HEIGHT   "page-height"
#define SANE_NAME_PAGE_LOADED   "page-loaded"
#define SANE_NAME_PAGE_WIDTH    "page-width"
#define SANE_NAME_PDF   "pdf"
#define SANE_TITLE_PDF  "PDF button"
#define SANE_NAME_PREVIEW       "preview"
#define SANE_NAME_GRAY_PREVIEW  "preview-in-gray"
#define SANE_NAME_QUALITY_CAL   "quality-cal"
#define SANE_NAME_GAMMA_VECTOR_R        "red-gamma-table"
#define SANE_NAME_SCAN_RESOLUTION       "resolution"
#define SANE_NAME_RESOLUTION_BIND       "resolution-bind"
#define SANE_NAME_RGB_BIND      "rgb-bind"
#define SANE_TITLE_ADVANCED     SANE_I18N("Advanced")
#define SANE_TITLE_ANALOG_GAMMA_B       SANE_I18N("Analog gamma blue")
#define SANE_TITLE_ANALOG_GAMMA SANE_I18N("Analog gamma correction")
#define SANE_TITLE_ANALOG_GAMMA_G       SANE_I18N("Analog gamma green")
#define SANE_TITLE_ANALOG_GAMMA_R       SANE_I18N("Analog gamma red")
#define SANE_DESC_ANALOG_GAMMA_B        SANE_I18N("Analog gamma-correction for blue")
#define SANE_DESC_ANALOG_GAMMA_G        SANE_I18N("Analog gamma-correction for green")
#define SANE_DESC_ANALOG_GAMMA_R        SANE_I18N("Analog gamma-correction for red")
#define SANE_DESC_ANALOG_GAMMA  SANE_I18N("Analog gamma-correction")
#define SANE_TITLE_ANALOG_GAMMA_BIND    SANE_I18N("Bind analog gamma")
#define SANE_TITLE_RGB_BIND     SANE_I18N("Bind RGB")
#define SANE_TITLE_RESOLUTION_BIND      SANE_I18N("Bind X and Y resolution")
#define SANE_TITLE_BIT_DEPTH    SANE_I18N("Bit depth")
#define SANE_TITLE_BLACK_LEVEL  SANE_I18N("Black level")
#define SANE_TITLE_GAMMA_VECTOR_B       SANE_I18N("Blue intensity")
#define SANE_DESC_SCAN_BR_X     SANE_I18N("Bottom-right x position of scan area.")
#define SANE_TITLE_SCAN_BR_X    SANE_I18N("Bottom-right x")
#define SANE_DESC_SCAN_BR_Y     SANE_I18N("Bottom-right y position of scan area.")
#define SANE_TITLE_SCAN_BR_Y    SANE_I18N("Bottom-right y")
#define SANE_TITLE_BRIGHTNESS   SANE_I18N("Brightness")
#define SANE_TITLE_CAL_EXPOS_TIME_G     SANE_I18N("Cal. exposure-time for " "green")
#define SANE_TITLE_CAL_EXPOS_TIME_B     SANE_I18N("Cal. exposure-time for blue")
#define SANE_TITLE_CAL_EXPOS_TIME_R     SANE_I18N("Cal. exposure-time for red")
#define SANE_TITLE_CAL_EXPOS_TIME       SANE_I18N("Cal. exposure-time")
#define SANE_TITLE_CAL_LAMP_DEN SANE_I18N("Cal. lamp density")
#define SANE_DESC_CANCEL        SANE_I18N("Cancel button")
#define SANE_VALUE_SCAN_MODE_COLOR      SANE_I18N("Color")
#define SANE_TITLE_CONTRAST     SANE_I18N("Contrast")
#define SANE_DESC_BRIGHTNESS    SANE_I18N("Controls the brightness of the acquired image.")
#define SANE_DESC_CONTRAST      SANE_I18N("Controls the contrast of the acquired image.")
#define SANE_DESC_HUE   SANE_I18N("Controls the \"hue\" (blue-level) of the acquired image.")
#define SANE_DESC_BACKTRACK     SANE_I18N("Controls whether backtracking is forced.")
#define SANE_DESC_COPY  SANE_I18N("Copy button")
#define SANE_DESC_COVER_OPEN    SANE_I18N("Cover open")
#define SANE_DESC_CAL_EXPOS_TIME_B      SANE_I18N("Define exposure-time for blue calibration")
#define SANE_DESC_SCAN_EXPOS_TIME_B     SANE_I18N("Define exposure-time for blue scan")
#define SANE_DESC_CAL_EXPOS_TIME        SANE_I18N("Define exposure-time for calibration")
#define SANE_DESC_CAL_EXPOS_TIME_G      SANE_I18N("Define exposure-time for green calibration")
#define SANE_DESC_SCAN_EXPOS_TIME_G     SANE_I18N("Define exposure-time for green scan")
#define SANE_DESC_CAL_EXPOS_TIME_R      SANE_I18N("Define exposure-time for red calibration")
#define SANE_DESC_SCAN_EXPOS_TIME_R     SANE_I18N("Define exposure-time for red scan")
#define SANE_DESC_SCAN_EXPOS_TIME       SANE_I18N("Define exposure-time for scan")
#define SANE_DESC_CAL_LAMP_DEN  SANE_I18N("Define lamp density for calibration")
#define SANE_DESC_SCAN_LAMP_DEN SANE_I18N("Define lamp density for scan")
#define SANE_DESC_HALFTONE_PATTERN      SANE_I18N("Defines the halftoning (dithering) pattern for scanning " "halftoned images.")
#define SANE_DESC_SCAN_SPEED    SANE_I18N("Determines the speed at which the scan proceeds.")
#define SANE_DESC_CUSTOM_GAMMA  SANE_I18N("Determines whether a builtin or a custom gamma-table should be " "used.")
#define SANE_DESC_QUALITY_CAL   SANE_I18N("Do a quality white-calibration")
#define SANE_TITLE_DOR  SANE_I18N("Double Optical Resolution")
#define SANE_DESC_EMAIL SANE_I18N("Email button")
#define SANE_DESC_SELECT_EXPOSURE_TIME  SANE_I18N("Enable selection of exposure-time")
#define SANE_DESC_SELECT_LAMP_DENSITY   SANE_I18N("Enable selection of lamp density")
#define SANE_TITLE_ENHANCEMENT  SANE_I18N("Enhancement")
#define SANE_DESC_FAX   SANE_I18N("Fax button")
#define SANE_TITLE_FILE SANE_I18N("Filename")
#define SANE_TITLE_BACKTRACK    SANE_I18N("Force backtracking")
#define SANE_TITLE_GRAY_PREVIEW SANE_I18N("Force monochrome preview")
#define SANE_DESC_GAMMA_VECTOR_B        SANE_I18N("Gamma-correction table for the blue band.")
#define SANE_DESC_GAMMA_VECTOR_G        SANE_I18N("Gamma-correction table for the green band.")
#define SANE_DESC_GAMMA_VECTOR_R        SANE_I18N("Gamma-correction table for the red band.")
#define SANE_DESC_GAMMA_VECTOR  SANE_I18N("Gamma-correction table.  In color mode this option equally " "affects the red, green, and blue channels simultaneously (i.e., it is an " "intensity gamma table).")
#define SANE_TITLE_GEOMETRY     SANE_I18N("Geometry")
#define SANE_TITLE_GRAIN_SIZE   SANE_I18N("Grain size")
#define SANE_VALUE_SCAN_MODE_GRAY       SANE_I18N("Gray")
#define SANE_TITLE_GAMMA_VECTOR_G       SANE_I18N("Green intensity")
#define SANE_TITLE_HALFTONE_DIMENSION   SANE_I18N("Halftone pattern size")
#define SANE_TITLE_HALFTONE_PATTERN     SANE_I18N("Halftone pattern")
#define SANE_TITLE_HALFTONE     SANE_I18N("Halftoning")
#define SANE_DESC_ADVANCED      SANE_I18N("Hardware specific options")
#define SANE_TITLE_HIGHLIGHT_B  SANE_I18N("Highlight for blue")
#define SANE_TITLE_HIGHLIGHT_G  SANE_I18N("Highlight for green")
#define SANE_TITLE_HIGHLIGHT_R  SANE_I18N("Highlight for red")
#define SANE_TITLE_HIGHLIGHT    SANE_I18N("Highlight")
#define SANE_TITLE_HUE  SANE_I18N("Hue")
#define SANE_TITLE_GAMMA_VECTOR SANE_I18N("Image intensity")
#define SANE_DESC_ENHANCEMENT   SANE_I18N("Image modification options")
#define SANE_DESC_ANALOG_GAMMA_BIND     SANE_I18N("In RGB-mode use same values for each color")
#define SANE_DESC_RGB_BIND      SANE_I18N("In RGB-mode use same values for each color")
#define SANE_TITLE_LAMP_OFF_AT_EXIT     SANE_I18N("Lamp off at exit")
#define SANE_VALUE_SCAN_MODE_LINEART    SANE_I18N("Lineart")
#define SANE_TITLE_NEGATIVE     SANE_I18N("Negative")
#define SANE_DESC_BIT_DEPTH     SANE_I18N("Number of bits per sample, typical values are 1 for \"line-art\" " "and 8 for multibit scans.")
#define SANE_TITLE_NUM_OPTIONS  SANE_I18N("Number of options")
#define SANE_TITLE_PAGE_HEIGHT  SANE_I18N("Page height")
#define SANE_DESC_PAGE_LOADED   SANE_I18N("Page loaded")
#define SANE_TITLE_PAGE_WIDTH   SANE_I18N("Page width")
#define SANE_DESC_PDF   SANE_I18N("PDF button")
#define SANE_TITLE_PREVIEW      SANE_I18N("Preview")
#define SANE_TITLE_QUALITY_CAL  SANE_I18N("Quality calibration")
#define SANE_DESC_NUM_OPTIONS   SANE_I18N("Read-only option that specifies how many options a specific " "devices supports.")
#define SANE_TITLE_GAMMA_VECTOR_R       SANE_I18N("Red intensity")
#define SANE_DESC_PREVIEW       SANE_I18N("Request a preview-quality scan.")
#define SANE_DESC_GRAY_PREVIEW  SANE_I18N("Request that all previews are done in monochrome mode.  On a " "three-pass scanner this cuts down the number of passes to one and on a " "one-pass scanner, it reduces the memory requirements and scan-time of the " "preview.")
#define SANE_TITLE_SATURATION   SANE_I18N("Saturation")
#define SANE_DESC_GEOMETRY      SANE_I18N("Scan area and media size options")
#define SANE_DESC_SCAN  SANE_I18N("Scan button")
#define SANE_TITLE_SCAN_EXPOS_TIME_G    SANE_I18N("Scan exposure-time for " "green")
#define SANE_TITLE_SCAN_EXPOS_TIME_B    SANE_I18N("Scan exposure-time for blue")
#define SANE_TITLE_SCAN_EXPOS_TIME_R    SANE_I18N("Scan exposure-time for red")
#define SANE_TITLE_SCAN_EXPOS_TIME      SANE_I18N("Scan exposure-time")
#define SANE_TITLE_SCAN_LAMP_DEN        SANE_I18N("Scan lamp density")
#define SANE_TITLE_SCAN_MODE    SANE_I18N("Scan mode")
#define SANE_TITLE_SCAN_RESOLUTION      SANE_I18N("Scan resolution")
#define SANE_TITLE_SCAN_SOURCE  SANE_I18N("Scan source")
#define SANE_TITLE_SCAN_SPEED   SANE_I18N("Scan speed")
#define SANE_DESC_SENSORS       SANE_I18N("Scanner sensors and buttons")
#define SANE_DESC_THRESHOLD     SANE_I18N("Select minimum-brightness to get a white point")
#define SANE_DESC_SCAN_MODE     SANE_I18N("Selects the scan mode (e.g., lineart, monochrome, or color).")
#define SANE_DESC_SCAN_SOURCE   SANE_I18N("Selects the scan source (such as a document-feeder).")
#define SANE_DESC_GRAIN_SIZE    SANE_I18N("Selects the \"graininess\" of the acquired image.  Smaller values " "result in sharper images.")
#define SANE_DESC_SHADOW_B      SANE_I18N("Selects what blue radiance level should be considered \"black\".")
#define SANE_DESC_HIGHLIGHT_B   SANE_I18N("Selects what blue radiance level should be considered \"full " "blue\".")
#define SANE_DESC_WHITE_LEVEL_B SANE_I18N("Selects what blue radiance level should be considered \"white\".")
#define SANE_DESC_SHADOW_G      SANE_I18N("Selects what green radiance level should be considered \"black\".")
#define SANE_DESC_HIGHLIGHT_G   SANE_I18N("Selects what green radiance level should be considered \"full " "green\".")
#define SANE_DESC_WHITE_LEVEL_G SANE_I18N("Selects what green radiance level should be considered \"white\".")
#define SANE_DESC_BLACK_LEVEL   SANE_I18N("Selects what radiance level should be considered \"black\".")
#define SANE_DESC_SHADOW        SANE_I18N("Selects what radiance level should be considered \"black\".")
#define SANE_DESC_HIGHLIGHT     SANE_I18N("Selects what radiance level should be considered \"white\".")
#define SANE_DESC_WHITE_LEVEL   SANE_I18N("Selects what radiance level should be considered \"white\".")
#define SANE_DESC_SHADOW_R      SANE_I18N("Selects what red radiance level should be considered \"black\".")
#define SANE_DESC_HIGHLIGHT_R   SANE_I18N("Selects what red radiance level should be considered \"full red\".")
#define SANE_DESC_WHITE_LEVEL_R SANE_I18N("Selects what red radiance level should be considered \"white\".")
#define SANE_DESC_HALFTONE      SANE_I18N("Selects whether the acquired image should be halftoned (dithered).")
#define SANE_TITLE_SENSORS      SANE_I18N("Sensors")
#define SANE_TITLE_SELECT_EXPOSURE_TIME SANE_I18N("Set exposure-time")
#define SANE_TITLE_SELECT_LAMP_DENSITY  SANE_I18N("Set lamp density")
#define SANE_DESC_SCAN_X_RESOLUTION     SANE_I18N("Sets the horizontal resolution of the scanned image.")
#define SANE_DESC_SCAN_RESOLUTION       SANE_I18N("Sets the resolution of the scanned image.")
#define SANE_DESC_HALFTONE_DIMENSION    SANE_I18N("Sets the size of the halftoning (dithering) pattern used when " "scanning halftoned images.")
#define SANE_DESC_SCAN_Y_RESOLUTION     SANE_I18N("Sets the vertical resolution of the scanned image.")
#define SANE_TITLE_SHADOW_B     SANE_I18N("Shadow for blue")
#define SANE_TITLE_SHADOW_G     SANE_I18N("Shadow for green")
#define SANE_TITLE_SHADOW_R     SANE_I18N("Shadow for red")
#define SANE_TITLE_SHADOW       SANE_I18N("Shadow")
#define SANE_DESC_STANDARD      SANE_I18N("Source, mode and resolution options")
#define SANE_DESC_PAGE_HEIGHT   SANE_I18N("Specifies the height of the media.")
#define SANE_DESC_PAGE_WIDTH    SANE_I18N("Specifies the width of the media.  Required for automatic " "centering of sheet-fed scans.")
#define SANE_TITLE_STANDARD     SANE_I18N("Standard")
#define SANE_DESC_NEGATIVE      SANE_I18N("Swap black and white")
#define SANE_DESC_FILE  SANE_I18N("The filename of the image to be loaded.")
#define SANE_DESC_SATURATION    SANE_I18N("The saturation level controls the amount of \"blooming\" that " "occurs when acquiring an image with a camera. Larger values cause more " "blooming.")
#define SANE_TITLE_THRESHOLD    SANE_I18N("Threshold")
#define SANE_DESC_SCAN_TL_X     SANE_I18N("Top-left x position of scan area.")
#define SANE_TITLE_SCAN_TL_X    SANE_I18N("Top-left x")
#define SANE_DESC_SCAN_TL_Y     SANE_I18N("Top-left y position of scan area.")
#define SANE_TITLE_SCAN_TL_Y    SANE_I18N("Top-left y")
#define SANE_DESC_LAMP_OFF_AT_EXIT      SANE_I18N("Turn off lamp when program exits")
#define SANE_TITLE_CUSTOM_GAMMA SANE_I18N("Use custom gamma table")
#define SANE_DESC_DOR   SANE_I18N("Use lens that doubles optical resolution")
#define SANE_DESC_RESOLUTION_BIND       SANE_I18N("Use same values for X and Y resolution")
#define SANE_DESC_WARMUP        SANE_I18N("Warmup lamp before scanning")
#define SANE_TITLE_WARMUP       SANE_I18N("Warmup lamp")
#define SANE_TITLE_WHITE_LEVEL_B        SANE_I18N("White level for blue")
#define SANE_TITLE_WHITE_LEVEL_G        SANE_I18N("White level for green")
#define SANE_TITLE_WHITE_LEVEL_R        SANE_I18N("White level for red")
#define SANE_TITLE_WHITE_LEVEL  SANE_I18N("White level")
#define SANE_TITLE_SCAN_X_RESOLUTION    SANE_I18N("X-resolution")
#define SANE_TITLE_SCAN_Y_RESOLUTION    SANE_I18N("Y-resolution")
#define SANE_NAME_SATURATION    "saturation"
#define SANE_NAME_SCAN  "scan"
#define SANE_TITLE_SCAN "Scan button"
#define SANE_NAME_SCAN_EXPOS_TIME       "scan-exposure-time"
#define SANE_NAME_SCAN_EXPOS_TIME_B     "scan-exposure-time-b"
#define SANE_NAME_SCAN_EXPOS_TIME_G     "scan-exposure-time-g"
#define SANE_NAME_SCAN_EXPOS_TIME_R     "scan-exposure-time-r"
#define SANE_NAME_SCAN_LAMP_DEN "scan-lamp-density"
#define SANE_NAME_SELECT_EXPOSURE_TIME  "select-exposure-time"
#define SANE_NAME_SELECT_LAMP_DENSITY   "select-lamp-density"
#define SANE_NAME_SENSORS       "sensors"
#define SANE_NAME_SHADOW        "shadow"
#define SANE_NAME_SHADOW_B      "shadow-b"
#define SANE_NAME_SHADOW_G      "shadow-g"
#define SANE_NAME_SHADOW_R      "shadow-r"
#define SANE_NAME_SCAN_SOURCE   "source"
#define SANE_NAME_SCAN_SPEED    "speed"
#define SANE_NAME_STANDARD      "standard"
#define SANE_I18N(text) text
#define SANE_NAME_THRESHOLD     "threshold"
#define SANE_NAME_SCAN_TL_X     "tl-x"
#define SANE_NAME_SCAN_TL_Y     "tl-y"
#define SANE_NAME_WARMUP        "warmup"
#define SANE_NAME_WHITE_LEVEL   "white-level"
#define SANE_NAME_WHITE_LEVEL_B "white-level-b"
#define SANE_NAME_WHITE_LEVEL_G "white-level-g"
#define SANE_NAME_WHITE_LEVEL_R "white-level-r"
#define SANE_NAME_SCAN_X_RESOLUTION     "x-resolution"
#define SANE_NAME_SCAN_Y_RESOLUTION     "y-resolution"

VI Package Format and Installation

11 Software Installation
11.1 Package Dependencies
The LSB runtime environment shall provide the following dependencies. 
lsb-imaging
 	This dependency is used to indicate that the application is dependent on features contained in the LSB Imaging module specification.
These dependencies shall have a version of 5.0.

Annex A Alphabetical Listing of Interfaces by Library
A.1 libsane
The behavior of the interfaces in this library is specified by the following Standards.
SANE Standard Version 1.04 [SANE]	

Table A-1 libsane Function Interfaces
sane_cancel[SANE]	sane_get_option_descriptor[SANE]	sane_read[SANE]	
sane_close[SANE]	sane_get_parameters[SANE]	sane_set_io_mode[SANE]	
sane_control_option[SANE]	sane_get_select_fd[SANE]	sane_start[SANE]	
sane_exit[SANE]	sane_init[SANE]	sane_strstatus[SANE]	
sane_get_devices[SANE]	sane_open[SANE]	

A.2 libcups
The behavior of the interfaces in this library is specified by the following Standards.
CUPS API Reference [CUPS 1.2]	
This Specification [LSB]	

Table A-2 libcups Function Interfaces
cupsAddDest[LSB]	httpBlocking[CUPS 1.2]	ippAddResolution[CUPS 1.2]	
cupsAddOption[LSB]	httpCheck[CUPS 1.2]	ippAddResolutions[CUPS 1.2]	
cupsCancelJob[LSB]	httpClearCookie[CUPS 1.2]	ippAddSeparator[CUPS 1.2]	
cupsDoAuthentication[CUPS 1.2]	httpClearFields[CUPS 1.2]	ippAddString[CUPS 1.2]	
cupsDoFileRequest[CUPS 1.2]	httpClose[CUPS 1.2]	ippAddStrings[CUPS 1.2]	
cupsEncodeOptions[CUPS 1.2]	httpConnect[CUPS 1.2]	ippDateToTime[CUPS 1.2]	
cupsEncryption[LSB]	httpConnectEncrypt[CUPS 1.2]	ippDelete[CUPS 1.2]	
cupsFreeDests[LSB]	httpDecode64_2[CUPS 1.2]	ippDeleteAttribute[CUPS 1.2]	
cupsFreeJobs[LSB]	httpDelete[CUPS 1.2]	ippErrorString[CUPS 1.2]	
cupsFreeOptions[LSB]	httpEncode64_2[CUPS 1.2]	ippFindAttribute[CUPS 1.2]	
cupsGetDefault[LSB]	httpEncryption[CUPS 1.2]	ippFindNextAttribute[CUPS 1.2]	
cupsGetDefault2[CUPS 1.2]	httpError[CUPS 1.2]	ippLength[CUPS 1.2]	
cupsGetDest[LSB]	httpFlush[CUPS 1.2]	ippNew[CUPS 1.2]	
cupsGetDests[LSB]	httpGet[CUPS 1.2]	ippPort[CUPS 1.2]	
cupsGetDests2[CUPS 1.2]	httpGetCookie[CUPS 1.2]	ippRead[CUPS 1.2]	
cupsGetFd[CUPS 1.2]	httpGetDateString[CUPS 1.2]	ippReadFile[CUPS 1.2]	
cupsGetFile[CUPS 1.2]	httpGetDateTime[CUPS 1.2]	ippReadIO[CUPS 1.2]	
cupsGetJobs[LSB]	httpGetField[CUPS 1.2]	ippSetPort[CUPS 1.2]	
cupsGetJobs2[CUPS 1.2]	httpGetHostByName[CUPS 1.2]	ippTimeToDate[CUPS 1.2]	
cupsGetOption[LSB]	httpGetSubField[CUPS 1.2]	ippWrite[CUPS 1.2]	
cupsGetPPD[LSB]	httpGets[CUPS 1.2]	ippWriteFile[CUPS 1.2]	
cupsGetPPD2[CUPS 1.2]	httpHead[CUPS 1.2]	ippWriteIO[CUPS 1.2]	
cupsGetPassword[LSB]	httpInitialize[CUPS 1.2]	ppdClose[LSB]	
cupsLangEncoding[LSB]	httpMD5[CUPS 1.2]	ppdCollect[LSB]	
cupsLangFlush[LSB]	httpMD5Final[CUPS 1.2]	ppdConflicts[LSB]	
cupsLangFree[LSB]	httpMD5String[CUPS 1.2]	ppdEmit[LSB]	
cupsLangGet[LSB]	httpOptions[CUPS 1.2]	ppdEmitFd[LSB]	
cupsLastError[LSB]	httpPost[CUPS 1.2]	ppdEmitJCL[LSB]	
cupsMarkOptions[LSB]	httpPut[CUPS 1.2]	ppdErrorString[LSB]	
cupsParseOptions[LSB]	httpReconnect[CUPS 1.2]	ppdFindAttr[LSB]	
cupsPrintFile[LSB]	httpSetCookie[CUPS 1.2]	ppdFindChoice[LSB]	
cupsPrintFile2[CUPS 1.2]	httpSetField[CUPS 1.2]	ppdFindMarkedChoice[LSB]	
cupsPrintFiles[LSB]	httpStatus[CUPS 1.2]	ppdFindNextAttr[LSB]	
cupsPrintFiles2[CUPS 1.2]	httpTrace[CUPS 1.2]	ppdFindOption[LSB]	
cupsPutFd[CUPS 1.2]	httpUpdate[CUPS 1.2]	ppdIsMarked[LSB]	
cupsPutFile[CUPS 1.2]	httpWait[CUPS 1.2]	ppdLastError[LSB]	
cupsServer[LSB]	ippAddBoolean[CUPS 1.2]	ppdMarkDefaults[LSB]	
cupsSetDests[LSB]	ippAddBooleans[CUPS 1.2]	ppdMarkOption[LSB]	
cupsSetDests2[CUPS 1.2]	ippAddCollection[CUPS 1.2]	ppdOpen[LSB]	
cupsSetEncryption[LSB]	ippAddCollections[CUPS 1.2]	ppdOpenFd[LSB]	
cupsSetPasswordCB[LSB]	ippAddDate[CUPS 1.2]	ppdOpenFile[LSB]	
cupsSetServer[LSB]	ippAddInteger[CUPS 1.2]	ppdPageLength[LSB]	
cupsSetUser[LSB]	ippAddIntegers[CUPS 1.2]	ppdPageSize[LSB]	
cupsTempFd[LSB]	ippAddRange[CUPS 1.2]	ppdPageWidth[LSB]	
cupsUser[LSB]	ippAddRanges[CUPS 1.2]	ppdSetConformance[LSB]	

A.3 libcupsimage
The behavior of the interfaces in this library is specified by the following Standards.
This Specification [LSB]	

Table A-3 libcupsimage Function Interfaces
cupsRasterClose[LSB]	cupsRasterReadHeader[LSB]	cupsRasterWriteHeader[LSB]	
cupsRasterOpen[LSB]	cupsRasterReadPixels[LSB]	cupsRasterWritePixels[LSB]	

Annex B GNU Free Documentation License (Informative)
This specification is published under the terms of the GNU Free Documentation License, Version 1.1, March 2000
Copyright (C) 2000 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
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