Linux Standard Base Core Specification 3.0Preview1 | ||
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Tty ioctl commands are a subset of the ioctl() calls, which can perform a variety of functions on tty devices. fd shall be an open file descriptor referring to a terminal device.
The following ioctl()s are provided:
Get the size attributes of the tty. argp is a pointer to a winsize structure.
On success, 0 is returned.
On error, -1 is returned and
the global variable errno
is set appropriately.
fd is not a valid descriptor.
argp references an inaccessible memory area.
request and argp are not valid.
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