sbase/xargs.1

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.Dd January 30, 2015
.Dt XARGS 1
.Os sbase
.Sh NAME
.Nm xargs
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.Nd construct argument list(s) and execute command
.Sh SYNOPSIS
.Nm
.Op Fl n Ar maxargs
.Op Fl r
.Op Fl E Ar eofstr
.Op Ar cmd Op Ar arg...
.Sh DESCRIPTION
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.Nm
reads space, tab, newline and EOF delimited strings from stdin
and executes the specified
.Ar cmd
with the strings as
.Ar arguments .
.Pp
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Any arguments specified on the command line are given to the command upon
each invocation, followed by some number of the arguments read from
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stdin. The command is repeatedly executed one or more times until stdin
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is exhausted.
.Pp
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Spaces, tabs and newlines may be embedded in arguments using single (`'')
or double (`"') quotes or backslashes ('\\'). 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.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl n Ar maxargs
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Use at most
.Ar maxargs
arguments per command line.
.It Fl r
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Do not run the command if there are no arguments. Normally the command is
executed at least once even if there are no arguments.
.It Fl E Ar eofstr
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Use
.Ar eofstr
as a logical EOF marker.
.El
.Sh EXIT STATUS
xargs exits with one of the following values:
.Bl -tag -width Ds
.It 0
All invocations of command returned a zero exit status.
.It 123
One or more invocations of command returned a nonzero exit status.
.It 124
The command exited with a 255 exit status.
.It 125
The command was killed or stopped by a signal.
.It 126
The command was found but could not be executed.
.It 127
The command could not be found.
.It 1
Some other error occurred.
.El