1EXIT(3P)                   POSIX Programmer's Manual                  EXIT(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

13       exit — terminate a process
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SYNOPSIS

16       #include <stdlib.h>
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18       void exit(int status);
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DESCRIPTION

21       The functionality described on this reference page is aligned with  the
22       ISO C  standard.  Any  conflict between the requirements described here
23       and the ISO C standard is unintentional. This  volume  of  POSIX.1‐2008
24       defers to the ISO C standard.
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26       The  value of status may be 0, EXIT_SUCCESS, EXIT_FAILURE, or any other
27       value, though only the least significant 8  bits  (that  is,  status  &
28       0377) shall be available to a waiting parent process.
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30       The  exit()  function  shall  first  call  all  functions registered by
31       atexit(), in the reverse order of their  registration,  except  that  a
32       function  is  called after any previously registered functions that had
33       already been called at the time it was  registered.  Each  function  is
34       called  as  many times as it was registered. If, during the call to any
35       such function, a call to the longjmp() function is made that would ter‐
36       minate the call to the registered function, the behavior is undefined.
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38       If  a  function  registered  by a call to atexit() fails to return, the
39       remaining registered functions shall not be called and the rest of  the
40       exit() processing shall not be completed. If exit() is called more than
41       once, the behavior is undefined.
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43       The exit() function shall then flush all open  streams  with  unwritten
44       buffered data and close all open streams. Finally, the process shall be
45       terminated with the same consequences as described in  Consequences  of
46       Process Termination.
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RETURN VALUE

49       The exit() function does not return.
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ERRORS

52       No errors are defined.
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54       The following sections are informative.
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EXAMPLES

57       None.
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APPLICATION USAGE

60       None.
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RATIONALE

63       See _Exit().
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FUTURE DIRECTIONS

66       None.
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SEE ALSO

69       _Exit(), atexit(), exec, longjmp(), tmpfile()
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71       The Base Definitions volume of POSIX.1‐2008, <stdlib.h>
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74       Portions  of  this text are reprinted and reproduced in electronic form
75       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
76       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
77       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
78       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
79       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  In  the
80       event of any discrepancy between this version and the original IEEE and
81       The Open Group Standard, the original IEEE and The Open Group  Standard
82       is  the  referee document. The original Standard can be obtained online
83       at http://www.unix.org/online.html .
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85       Any typographical or formatting errors that appear  in  this  page  are
86       most likely to have been introduced during the conversion of the source
87       files to man page format. To report such errors,  see  https://www.ker‐
88       nel.org/doc/man-pages/reporting_bugs.html .
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92IEEE/The Open Group                  2013                             EXIT(3P)
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