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

NAME
       on_exit  -  register a function to be called at normal process termina-
       tion

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 glibc.  It no
       longer occurs in Solaris (SunOS 5).  Portable application should  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 3.74 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest     version     of     this    page,    can    be    found    at
       http://www.kernel.org/doc/man-pages/.

GNU                               2014-08-19                        ON_EXIT(3)

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