1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
3 .\" Permission is granted to make and distribute verbatim copies of this
4 .\" manual provided the copyright notice and this permission notice are
5 .\" preserved on all copies.
7 .\" Permission is granted to copy and distribute modified versions of this
8 .\" manual under the conditions for verbatim copying, provided that the
9 .\" entire resulting derived work is distributed under the terms of a
10 .\" permission notice identical to this one.
12 .\" Since the Linux kernel and libraries are constantly changing, this
13 .\" manual page may be incorrect or out-of-date. The author(s) assume no
14 .\" responsibility for errors or omissions, or for damages resulting from
15 .\" the use of the information contained herein. The author(s) may not
16 .\" have taken the same level of care in the production of this manual,
17 .\" which is licensed free of charge, as they might when working
20 .\" Formatted or processed versions of this manual, if unaccompanied by
21 .\" the source, must acknowledge the copyright and authors of this work.
23 .\" References consulted:
24 .\" Linux libc source code
25 .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
27 .\" Modified 1993-04-02, David Metcalfe
28 .\" Modified 1993-07-25, Rik Faith (faith@cs.unc.edu)
29 .TH ON_EXIT 3 2008-12-05 "GNU" "Linux Programmer's Manual"
31 on_exit \- register a function to be called at normal process termination
34 .B #include <stdlib.h>
36 .BI "int on_exit(void (*" function ")(int , void *), void *" arg );
40 Feature Test Macro Requirements for glibc (see
41 .BR feature_test_macros (7)):
45 _BSD_SOURCE || _SVID_SOURCE
49 function registers the given \fIfunction\fP to be
50 called at normal process termination, whether via
52 or via return from the program's \fImain\fP().
53 The \fIfunction\fP is passed the status argument given to the last call to
55 and the \fIarg\fP argument from
58 The same function may be registered multiple times:
59 it is called once for each registration.
61 When a child process is created via
63 it inherits copies of its parent's registrations.
64 Upon a successful call to one of the
66 functions, all registrations are removed.
70 function returns the value 0 if successful; otherwise
71 it returns a nonzero value.
73 This function comes from SunOS 4, but is also present in
74 libc4, libc5 and glibc.
75 It no longer occurs in Solaris (SunOS 5).
76 Avoid this function, and use the standard