on_exit(3) -- Linux man page

 

NAME

on_exit - register a function to be called at normal program termination  

SYNOPSIS

#include <stdlib.h>

int on_exit(void (*function)(int , void *), void *arg);
 

DESCRIPTION

The on_exit() function registers the given function to be called at normal program termination, whether via exit(3) or via return from the program's main. The function is passed the argument to exit(3) and the arg argument from on_exit().  

RETURN VALUE

The on_exit() function returns the value 0 if successful; otherwise it returns a non-zero value.  

CONFORMING TO

This function comes from SunOS 4, but is also present in libc4, libc5 and glibc. It no longer occurs in Solaris (SunOS 5). Avoid this function, and use the standard atexit(3) instead.  

SEE ALSO

atexit(3), exit(3), _exit(3)