atexit - phpMan

ATEXIT(3)                  Linux Programmer’s Manual                 ATEXIT(3)



NAME
       atexit - register a function to be called at normal program termination

SYNOPSIS
       #include <stdlib.h>

       int atexit(void (*function)(void));

DESCRIPTION
       The  atexit()  function registers the given function to be called at normal program
       termination, either via exit(3) or via return from the program’s main().  Functions
       so  registered  are called in the reverse order of their registration; no arguments
       are passed.

       At least ATEXIT_MAX functions can be registered. This value is at least 32. It  can
       be obtained using sysconf(3).

       By a successful call to one of the exec functions, all registrations are undone.

RETURN VALUE
       The  atexit()  function  returns  the value 0 if successful; otherwise it returns a
       nonzero value.

EXAMPLE
       #include <stdio.h>
       #include <stdlib.h>
       #include <unistd.h>

       void bye(void) {
               printf("That was all, folks\n");
       }

       int main(){
               long a;
               int i;

               a = sysconf(_SC_ATEXIT_MAX);
               printf("ATEXIT_MAX = %ld\n", a);

               i = atexit(bye);
               if (i != 0) {
                       fprintf(stderr, "cannot set exit function\n");
                       return EXIT_FAILURE;
               }
               return EXIT_SUCCESS;
       }

CONFORMING TO
       SVID 3, BSD 4.3, ISO 9899, POSIX 1003.1-2001

SEE ALSO
       exit(3), _exit(3), on_exit(3)



                                  2003-11-01                         ATEXIT(3)

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