Originální popis anglicky:
return - return from a function
Návod, kniha: POSIX Programmer's Manual
return [n]
The
return utility shall cause the shell to stop executing the current
function or
dot script. If the shell is not currently executing a
function or
dot script, the results are unspecified.
None.
See the DESCRIPTION.
Not used.
None.
None.
Default.
Not used.
The standard error shall be used only for diagnostic messages.
None.
None.
The value of the special parameter
'?' shall be set to
n, an
unsigned decimal integer, or to the exit status of the last command executed
if
n is not specified. If the value of
n is greater than 255,
the results are undefined. When
return 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.
None.
The behavior of
return when not in a function or
dot script
differs between the System V shell and the KornShell. In the System V shell
this is an error, whereas in the KornShell, the effect is the same as
exit.
The results of returning a number greater than 255 are undefined because of
differing practices in the various historical implementations. Some shells AND
out all but the low-order 8 bits; others allow larger values, but not of
unlimited size.
See the discussion of appropriate exit status values under
exit .
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
.
