1 .\" This manpage is Copyright (C) 1992 Drew Eckhardt;
2 .\" and Copyright (C) 1993 Michael Haardt, Ian Jackson.
4 .\" %%%LICENSE_START(VERBATIM)
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10 .\" manual under the conditions for verbatim copying, provided that the
11 .\" entire resulting derived work is distributed under the terms of a
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14 .\" Since the Linux kernel and libraries are constantly changing, this
15 .\" manual page may be incorrect or out-of-date. The author(s) assume no
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17 .\" the use of the information contained herein. The author(s) may not
18 .\" have taken the same level of care in the production of this manual,
19 .\" which is licensed free of charge, as they might when working
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26 .\" Modified Wed Jul 21 23:02:38 1993 by Rik Faith <faith@cs.unc.edu>
27 .\" Modified 2001-11-17, aeb
29 .TH _EXIT 2 2017-05-03 "Linux" "Linux Programmer's Manual"
31 _exit, _Exit \- terminate the calling process
33 .B #include <unistd.h>
35 .BI "void _exit(int " status );
37 .B #include <stdlib.h>
39 .BI "void _Exit(int " status );
42 Feature Test Macro Requirements for glibc (see
43 .BR feature_test_macros (7)):
49 _ISOC99_SOURCE || _POSIX_C_SOURCE\ >=\ 200112L
55 terminates the calling process "immediately".
56 Any open file descriptors belonging to the process are closed.
57 Any children of the process are inherited by
59 (or by the nearest "subreaper" process as defined through the use of the
61 .B PR_SET_CHILD_SUBREAPER
63 The process's parent is sent a
69 is returned to the parent process as the process's exit status, and
70 can be collected using one of the
79 These functions do not return.
81 POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD.
84 was introduced by C99.
86 For a discussion on the effects of an exit, the transmission of
87 exit status, zombie processes, signals sent, and so on, see
95 functions registered with
101 streams are not flushed.
104 does close open file descriptors, and this may cause an unknown delay,
105 waiting for pending output to finish.
106 If the delay is undesired,
107 it may be useful to call functions like
111 Whether any pending I/O is canceled, and which pending I/O may be
114 is implementation-dependent.
115 .SS C library/kernel differences
116 In glibc up to version 2.3, the
118 wrapper function invoked the kernel system call of the same name.
119 Since glibc 2.3, the wrapper function invokes
121 in order to terminate all of the threads in a process.