Linux Standard Base Core Specification 4.1 | ||
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The interface __vprintf_chk() shall function in the same way as the interface vprintf(), except that __vprintf_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 __vprintf_chk() function is not in the source standard; it is only in the binary standard.
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