__getlogin_r_chk

Name

__getlogin_r_chk -- get user name, with buffer overflow checking (reentrant)

Synopsis

#include <unistd.h>

int __getlogin_r_chk(char * buf, size_t buflen, size_t maxlen);

Description

The interface __getlogin_r_chk() shall function in the same way as the interface getlogin_r(), except that __getlogin_r_chk() shall check for buffer overflow before computing a result. If an overflow is anticipated, the function shall abort and the program calling it shall exit.

The parameter buflen specifies the size of the buffer buf. If buflen exceeds maxlen, the function shall abort, and the program calling it shall exit.

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