176 lines
5.1 KiB
Groff
176 lines
5.1 KiB
Groff
.\" Copyright (c) 1990 The Regents of the University of California.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" John B. Roll Jr. and the Institute of Electrical and Electronics
|
|
.\" Engineers, Inc.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)xargs.1 5.5 (Berkeley) 6/27/91
|
|
.\"
|
|
.TH XARGS 1 "June 27, 1991"
|
|
.UC 7
|
|
.SH NAME
|
|
xargs \- construct argument list(s) and execute utility.
|
|
.SH SYNOPSIS
|
|
.B xargs
|
|
.RB [ \-ft0 ]
|
|
.RB [[ \-x ]
|
|
.B \-n
|
|
.IR number ]
|
|
.RB [ \-s
|
|
.IR size ]
|
|
.RI [ utility
|
|
.RI [ argument " ...]]"
|
|
.SH DESCRIPTION
|
|
The
|
|
.B xargs
|
|
utility reads space, tab, newline and end-of-file delimited arguments
|
|
from the standard input and executes the specified
|
|
.I utility
|
|
with them as arguments.
|
|
.PP
|
|
The utility and any arguments specified on the command line are given
|
|
to the
|
|
.I utility
|
|
upon each invocation, followed by some number of the arguments read
|
|
from standard input.
|
|
The
|
|
.I utility
|
|
is repeatedly executed until standard input is exhausted.
|
|
.PP
|
|
Spaces, tabs and newlines may be embedded in arguments using single (`` ' '')
|
|
or double (``"'') quotes or backslashes (``\e'').
|
|
Single quotes escape all non-single quote characters, excluding newlines,
|
|
up to the matching single quote.
|
|
Double quotes escape all non-double quote characters, excluding newlines,
|
|
up to the matching double quote.
|
|
Any single character, including newlines, may be escaped by a backslash.
|
|
.PP
|
|
The options are as follows:
|
|
.TP
|
|
.B \-f
|
|
Force
|
|
.B xargs
|
|
to ignore the exit status returned by
|
|
.IR utility .
|
|
By default,
|
|
.B xargs
|
|
will exit immediately if
|
|
.I utility
|
|
exits with a non-zero exit status.
|
|
This does not include ignoring
|
|
.I utility
|
|
exiting due to a signal or without calling
|
|
.BR exit (2).
|
|
.TP
|
|
.BI \-n " number"
|
|
Set the maximum number of arguments taken from standard input for each
|
|
invocation of the utility.
|
|
An invocation of
|
|
.I utility
|
|
will use less than
|
|
.I number
|
|
standard input arguments if the number of bytes accumulated (see the
|
|
.I \-s
|
|
option) exceeds the specified
|
|
.I size
|
|
or there are fewer than
|
|
.I number
|
|
arguments remaining for the last invocation of
|
|
.IR utility .
|
|
The current default value for
|
|
.I number
|
|
is 5000.
|
|
.TP
|
|
.BI \-s " size"
|
|
Set the maximum number of bytes for the command line length provided to
|
|
.IR utility .
|
|
The sum of the length of the utility name and the arguments passed to
|
|
.I utility
|
|
(including NULL terminators) will be less than or equal to this number.
|
|
The current default value for
|
|
.I size
|
|
is ARG_MAX - 2048.
|
|
.TP
|
|
.B \-t
|
|
Echo the command to be executed to standard error immediately before it
|
|
is executed.
|
|
.TP
|
|
.B \-x
|
|
Force
|
|
.B xargs
|
|
to terminate immediately if a command line containing
|
|
.I number
|
|
arguments will not fit in the specified (or default) command line length.
|
|
.TP
|
|
.B \-0
|
|
Read null-byte terminated pathnames from standard input as may have been
|
|
produced by the
|
|
.B \-print0
|
|
option of
|
|
.BR find (1).
|
|
This is a MINIX 3 specific extension to
|
|
.BR xargs .
|
|
.PP
|
|
If no
|
|
.I utility
|
|
is specified,
|
|
.BR echo (1)
|
|
is used.
|
|
.PP
|
|
Undefined behavior may occur if
|
|
.I utility
|
|
reads from the standard input.
|
|
.PP
|
|
.B Xargs
|
|
exits with an exit status of 0 if no error occurs.
|
|
If
|
|
.I utility
|
|
cannot be invoked, is terminated by a signal or terminates without
|
|
calling
|
|
.BR exit (2),
|
|
.B xargs
|
|
exits with an exit status of 127.
|
|
If
|
|
.I utility
|
|
exits with an exit status other than 0,
|
|
.B xargs
|
|
exits with that exit status.
|
|
Otherwise,
|
|
.B xargs
|
|
exits with an exit status of 1.
|
|
.SH "SEE ALSO"
|
|
.BR echo (1),
|
|
.BR find (1).
|
|
.SH STANDARDS
|
|
The
|
|
.B xargs
|
|
utility is expected to be POSIX 1003.2 compliant.
|