Linux Standard Base Core Specification 4.0
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__vsnprintf_chk

Name

__vsnprintf_chk -- convert formatted output, with stack checking

Synopsis

#include <stdio.h>

int __vsnprintf_chk(char * s, size_t maxlen, int flag, size_t slen, const char * format, va_list args);

Description

The interface __vsnprintf_chk() shall function in the same way as the interface vsnprintf(), except that __vsnprintf_chk() shall check for stack overflow before computing a result, depending on the value of the flag parameter. If an overflow is anticipated, the function shall abort and the program calling it shall exit.

In general, the higher the value of flag, the more security measures this interface shall take in the form of checking the stack, parameter values, and so on.

The parameter slen specifies the size of the object pointed to by s. If slen is less than maxlen, the function shall abort and the program calling it shall exit.

In general, the higher the value of flag, the more security measures this interface shall take in the form of checking the stack, parameter values, and so on.

The __vsnprintf_chk() function is not in the source standard; it is only in the binary standard.

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