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NAME

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

SYNOPSIS

       #include <stdlib.h>

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

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       on_exit(): _BSD_SOURCE || _SVID_SOURCE

DESCRIPTION

       The on_exit() function registers the given function  to  be  called  at
       normal  process 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

       _exit(2), atexit(3), exit(3)

COLOPHON

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