1EXIT(P)                    POSIX Programmer's Manual                   EXIT(P)
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NAME

6       exit - cause the shell to exit
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SYNOPSIS

9       exit [n]
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DESCRIPTION

12       The  exit  utility  shall  cause the shell to exit with the exit status
13       specified by the unsigned decimal integer n.  If n  is  specified,  but
14       its  value  is  not  between  0 and 255 inclusively, the exit status is
15       undefined.
16
17       A trap on EXIT shall be executed before the  shell  terminates,  except
18       when the exit utility is invoked in that trap itself, in which case the
19       shell shall exit immediately.
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OPTIONS

22       None.
23

OPERANDS

25       See the DESCRIPTION.
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STDIN

28       Not used.
29

INPUT FILES

31       None.
32

ENVIRONMENT VARIABLES

34       None.
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ASYNCHRONOUS EVENTS

37       Default.
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STDOUT

40       Not used.
41

STDERR

43       The standard error shall be used only for diagnostic messages.
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OUTPUT FILES

46       None.
47

EXTENDED DESCRIPTION

49       None.
50

EXIT STATUS

52       The exit status shall be n, if specified. Otherwise, the value shall be
53       the  exit value of the last command executed, or zero if no command was
54       executed. When exit is executed in a trap action, the last  command  is
55       considered  to  be  the command that executed immediately preceding the
56       trap action.
57

CONSEQUENCES OF ERRORS

59       Default.
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61       The following sections are informative.
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APPLICATION USAGE

64       None.
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EXAMPLES

67       Exit with a true value:
68
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70              exit 0
71
72       Exit with a false value:
73
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75              exit 1
76

RATIONALE

78       As explained in other sections, certain exit status  values  have  been
79       reserved  for  special uses and should be used by applications only for
80       those purposes:
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82        126   A file to be executed was found, but it was  not  an  executable
83              utility.
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85        127   A utility to be executed was not found.
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87       >128   A command was interrupted by a signal.
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89

FUTURE DIRECTIONS

91       None.
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SEE ALSO

94       Special Built-In Utilities
95

97       Portions  of  this text are reprinted and reproduced in electronic form
98       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
99       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
100       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
101       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
102       event of any discrepancy between this version and the original IEEE and
103       The  Open Group Standard, the original IEEE and The Open Group Standard
104       is the referee document. The original Standard can be  obtained  online
105       at http://www.opengroup.org/unix/online.html .
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109IEEE/The Open Group                  2003                              EXIT(P)
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