__printf_chk -- format and print data, with stack checking


#include <stdio.h>

int __printf_chk(int flag, const char * format);


The interface __printf_chk() shall function in the same way as the interface printf(), except that __printf_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 __printf_chk() function is not in the source standard; it is only in the binary standard.