Sun Sep 1 19:37:21 2019 UTC ()
Document history
https://www.bell-labs.com/usr/dmr/www/man21.pdf


(sevan)
diff -r1.16 -r1.17 src/lib/libc/stdlib/exit.3
cvs diff -r1.16 -r1.17 src/lib/libc/stdlib/exit.3 (switch to unified diff)

--- src/lib/libc/stdlib/exit.3 2013/04/26 18:29:55 1.16
+++ src/lib/libc/stdlib/exit.3 2019/09/01 19:37:21 1.17
@@ -1,111 +1,116 @@ @@ -1,111 +1,116 @@
1.\" $NetBSD: exit.3,v 1.16 2013/04/26 18:29:55 christos Exp $ 1.\" $NetBSD: exit.3,v 1.17 2019/09/01 19:37:21 sevan Exp $
2.\" 2.\"
3.\" Copyright (c) 1990, 1991, 1993 3.\" Copyright (c) 1990, 1991, 1993
4.\" The Regents of the University of California. All rights reserved. 4.\" The Regents of the University of California. All rights reserved.
5.\" 5.\"
6.\" This code is derived from software contributed to Berkeley by 6.\" This code is derived from software contributed to Berkeley by
7.\" the American National Standards Committee X3, on Information 7.\" the American National Standards Committee X3, on Information
8.\" Processing Systems. 8.\" Processing Systems.
9.\" 9.\"
10.\" Redistribution and use in source and binary forms, with or without 10.\" Redistribution and use in source and binary forms, with or without
11.\" modification, are permitted provided that the following conditions 11.\" modification, are permitted provided that the following conditions
12.\" are met: 12.\" are met:
13.\" 1. Redistributions of source code must retain the above copyright 13.\" 1. Redistributions of source code must retain the above copyright
14.\" notice, this list of conditions and the following disclaimer. 14.\" notice, this list of conditions and the following disclaimer.
15.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" 2. Redistributions in binary form must reproduce the above copyright
16.\" notice, this list of conditions and the following disclaimer in the 16.\" notice, this list of conditions and the following disclaimer in the
17.\" documentation and/or other materials provided with the distribution. 17.\" documentation and/or other materials provided with the distribution.
18.\" 3. Neither the name of the University nor the names of its contributors 18.\" 3. Neither the name of the University nor the names of its contributors
19.\" may be used to endorse or promote products derived from this software 19.\" may be used to endorse or promote products derived from this software
20.\" without specific prior written permission. 20.\" without specific prior written permission.
21.\" 21.\"
22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32.\" SUCH DAMAGE. 32.\" SUCH DAMAGE.
33.\" 33.\"
34.\" from: @(#)exit.3 8.1 (Berkeley) 6/4/93 34.\" from: @(#)exit.3 8.1 (Berkeley) 6/4/93
35.\" 35.\"
36.Dd January 2, 2012 36.Dd September 1, 2019
37.Dt EXIT 3 37.Dt EXIT 3
38.Os 38.Os
39.Sh NAME 39.Sh NAME
40.Nm exit 40.Nm exit
41.Nd perform normal program termination 41.Nd perform normal program termination
42.Sh LIBRARY 42.Sh LIBRARY
43.Lb libc 43.Lb libc
44.Sh SYNOPSIS 44.Sh SYNOPSIS
45.In stdlib.h 45.In stdlib.h
46.Ft void 46.Ft void
47.Fn exit "int status" 47.Fn exit "int status"
48.Sh DESCRIPTION 48.Sh DESCRIPTION
49.Fn exit 49.Fn exit
50terminates a process. 50terminates a process.
51The 51The
52.Fa status 52.Fa status
53values 53values
54.Dv EXIT_SUCCESS 54.Dv EXIT_SUCCESS
55and 55and
56.Dv EXIT_FAILURE 56.Dv EXIT_FAILURE
57can be used to indicate successful and unsuccessful 57can be used to indicate successful and unsuccessful
58termination, respectively. 58termination, respectively.
59.Pp 59.Pp
60Before termination it performs the following functions in the 60Before termination it performs the following functions in the
61order listed: 61order listed:
62.Bl -enum -offset indent 62.Bl -enum -offset indent
63.It 63.It
64Call the functions registered with the 64Call the functions registered with the
65.Xr atexit 3 65.Xr atexit 3
66function, in the reverse order of their registration. 66function, in the reverse order of their registration.
67.It 67.It
68Flush all open output streams. 68Flush all open output streams.
69.It 69.It
70Close all open streams. 70Close all open streams.
71.It 71.It
72Unlink all files created with the 72Unlink all files created with the
73.Xr tmpfile 3 73.Xr tmpfile 3
74function. 74function.
75.El 75.El
76.Pp 76.Pp
77Following this, 77Following this,
78.Fn exit 78.Fn exit
79calls 79calls
80.Xr _exit 2 . 80.Xr _exit 2 .
81.Sh RESTRICTIONS 81.Sh RESTRICTIONS
82Standard C guarantees only that the values zero, 82Standard C guarantees only that the values zero,
83.Dv EXIT_SUCCESS , 83.Dv EXIT_SUCCESS ,
84and 84and
85.Dv EXIT_FAILURE 85.Dv EXIT_FAILURE
86produce meaningful results. 86produce meaningful results.
87POSIX extends this to guarantee that the 87POSIX extends this to guarantee that the
88least significant 8 bits of 88least significant 8 bits of
89.Fa status 89.Fa status
90are preserved and returned to the parent via 90are preserved and returned to the parent via
91.Xr wait 2 . 91.Xr wait 2 .
92Values outside the supported range 0-255 are bitwise-truncated; therefore, 92Values outside the supported range 0-255 are bitwise-truncated; therefore,
93negative values should not be used. 93negative values should not be used.
94.Sh RETURN VALUES 94.Sh RETURN VALUES
95The 95The
96.Fn exit 96.Fn exit
97function 97function
98never returns. 98never returns.
99.Sh SEE ALSO 99.Sh SEE ALSO
100.Xr _exit 2 , 100.Xr _exit 2 ,
101.Xr at_quick_exit 3 , 101.Xr at_quick_exit 3 ,
102.Xr atexit 3 , 102.Xr atexit 3 ,
103.Xr intro 3 , 103.Xr intro 3 ,
104.Xr quick_exit 3 , 104.Xr quick_exit 3 ,
105.Xr tmpfile 3 105.Xr tmpfile 3
106.Sh STANDARDS 106.Sh STANDARDS
107The 107The
108.Fn exit 108.Fn exit
109function 109function
110conforms to 110conforms to
111.St -ansiC . 111.St -ansiC .
 112.Sh HISTORY
 113The
 114.Fn exit
 115function appeared in
 116.At v1 .