Originální popis anglicky:
exit - cause the shell to exit
Návod, kniha: POSIX Programmer's Manual
exit [n]
The
exit utility shall cause the shell to exit with the exit status
specified by the unsigned decimal integer
n. If
n is specified,
but its value is not between 0 and 255 inclusively, the exit status is
undefined.
A
trap on
EXIT shall be executed before the shell terminates,
except when the
exit utility is invoked in that
trap itself, in
which case the shell shall exit immediately.
None.
See the DESCRIPTION.
Not used.
None.
None.
Default.
Not used.
The standard error shall be used only for diagnostic messages.
None.
None.
The exit status shall be
n, if specified. Otherwise, the value shall be
the exit value of the last command executed, or zero if no command was
executed. When
exit is executed in a
trap action, the last
command is considered to be the command that executed immediately preceding
the
trap action.
Default.
The following sections are informative.
None.
Exit with a
true value:
Exit with a
false value:
As explained in other sections, certain exit status values have been reserved
for special uses and should be used by applications only for those purposes:
- 126
- A file to be executed was found, but it was not an
executable utility.
- 127
- A utility to be executed was not found.
- >128
- A command was interrupted by a signal.
None.
Special Built-In Utilities
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
