linux man page for on_exit

ON_EXIT(3)						     Linux Programmer's Manual							ON_EXIT(3)

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 status argument given to the last call to exit(3) and the arg argument from on_exit().

       The same function may be registered multiple times: it is called once for each registration.

       When a child process is created via fork(2), it inherits copies of its parent's registrations.  Upon  a	successful  call  to  one  of  the
       exec(3) functions, all registrations are removed.

RETURN VALUE
       The on_exit() function returns the value 0 if successful; otherwise it returns a nonzero 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
       This page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2008-12-05								ON_EXIT(3)