Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
XE(1)			  BSD General Commands Manual			 XE(1)

     xe	-- run command for each	line or	argument

     xe	[-0FRnv] [-I arg] [-N maxargs] [-j maxjobs] command ...
     xe	[flags ...] -f argfile command ...
     xe	[flags ...] -s shellscript
     xe	[flags ...] -a command ... -- args ...
     xe	[flags ...] -A argsep command ... argsep args ...

     xe	is a new tool for constructing command lines from file listings	or ar-
     guments, which includes the best features of xargs(1) and apply(1).

     xe	means "execute for every ...".

     xe	supports different ways	to get arguments:

     command ...
	     By	default, arguments are read from standard input	separated by
	     newlines.	The command is constructed by taking the command line
	     parameters, replacing arg with the	read argument and then using
	     execvp(3) to run the command.  In this mode, no shell is involved
	     and arg must appears as its own word.

	     If	no argument is passed, default is `printf %s\n'.

     -f	argfile
	     Like previous, but	read arguments from argfile instead of stan-
	     dard input.

	     This will not close standard input	for execution.

     -s	shellscript
	     In	this mode, the single argument shellscript is executed using
	     sh	-c.  In	the script, the	passed arguments can be	accessed using
	     $1, $2, ...

     -a	command	... -- args ...
	     In	this mode, all arguments after -- are passed as	arguments to
	     the command.

     -A	argsep command ... argsep args ...
	     Same as previous, but a custom argument separator argsep is used
	     to	distinguish between command and	arguments.

     The options are as	follows:

     -0	     Input filenames are separated by NUL bytes	(instead of newlines,
	     which is the default)

     -F	     Fatal: stop and exit when a command execution failed.

     -R	     Return with status	122 when no arguments have been	passed (in-
	     stead of 0, the default).	xe never executes a command when no
	     arguments are passed.

     -n	     Dry run: don't run	the commands, just print them.

     -v	     Verbose: print commands to	standard error before running them.

     -I	arg  Replace occurrences of arg	(default: {}) in the command with the
	     argument(s).  Pass	an empty arg to	disable	the replace function.
	     Contrary to xargs(1) this also works when multiple	arguments are
	     to	be inserted.

     -N	maxargs
	     Pass up to	maxargs	arguments to each command (default: 1).
	     Using -N0 will pass as many arguments as possible.

     -j	maxjobs
	     Run up to maxjobs processes concurrently.	Using -j0 will run as
	     many processes as there are CPU cores running.

     The environment variable ITER is passed to	the child process and incre-
     mented on every command execution.

     xe	uses the convention of GNU and OpenBSD xargs:
     0	     on	success
     123     if	any invocation of the command exited with status 1 to 125.
     124     if	the command exited with	status 255
     125     if	the command was	killed by a signal
     126     if	the command cannot be run
     127     if	the command was	not found
     1	     if	some other error occurred

     Additionally, 122 is returned when	-R was passed and the command never
     was executed.

     apply(1), parallel(1), xapply(1), xargs(1)

     Leah Neukirchen <>

     xe	is in the public domain.

     To	the extent possible under law, the creator of this work	has waived all
     copyright and related or neighboring rights to this work.

BSD			       November	30, 2016			   BSD


Want to link to this manual page? Use this URL:

home | help