Интерактивная система просмотра системных руководств (man-ов)
shift (1)
shift (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
shift (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
shift (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
>> shift (1) ( POSIX man: Команды и прикладные программы пользовательского уровня )
NAME
shift - shift positional parameters
SYNOPSIS
shift[n]
DESCRIPTION
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.
OPTIONS
None.
OPERANDS
See the DESCRIPTION.
STDIN
Not used.
INPUT FILES
None.
ENVIRONMENT VARIABLES
None.
ASYNCHRONOUS EVENTS
Default.
STDOUT
Not used.
STDERR
The standard error shall be used only for diagnostic messages.
OUTPUT FILES
None.
EXTENDED DESCRIPTION
None.
EXIT STATUS
The exit status is >0 if n>$#; otherwise, it is zero.
CONSEQUENCES OF ERRORS
Default.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
$set a b c d e
$shift 2
$echo $*
c d e
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
Special Built-In Utilities
COPYRIGHT
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 .
