Originální popis anglicky:
shift - shift positional parameters
Návod, kniha: POSIX Programmer's Manual
shift [n]
The positional parameters shall be shifted. Positional parameter 1 shall be
assigned the value of parameter (1+
n), parameter 2 shall be assigned
the value of parameter (2+
n), and so on. The parameters represented by
the numbers
"$#" down to
"$#-n+1" shall be
unset, and the parameter
'#' is updated to reflect the new number of
positional parameters.
The value
n shall be an unsigned decimal integer less than or equal to
the value of the special parameter
'#' . If
n is not given, it
shall be assumed to be 1. If
n is 0, the positional and special
parameters are not changed.
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 is >0 if
n>$#; otherwise, it is zero.
Default.
The following sections are informative.
None.
$ set a b c d e
$ shift 2
$ echo $*
c d e
None.
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
.
