\input texinfo
@setfilename parset.info
@documentencoding utf-8
@settitle parset - set shell variables in parallel
@node Top
@top parset
@menu
* NAME::
* SYNOPSIS::
* DESCRIPTION::
* OPTIONS::
* SUPPORTED SHELLS::
* EXIT STATUS::
* AUTHOR::
* LICENSE::
* DEPENDENCIES::
* SEE ALSO::
@end menu
@node NAME
@chapter NAME
parset - set shell variables in parallel
@node SYNOPSIS
@chapter SYNOPSIS
@strong{parset} @emph{variablename} [options for GNU Parallel]
@strong{env_parset} @emph{variablename} [options for GNU Parallel]
@node DESCRIPTION
@chapter DESCRIPTION
@strong{parset} is a shell function that puts the output from GNU
@strong{parallel} into shell variables.
@strong{env_parset} is a shell function that puts the output from
@strong{env_parallel} into shell variables.
The @strong{parset} and @strong{env_parset} functions are defined as part of
@strong{env_parallel}.
If @emph{variablename} is a single variable name, this will be treated as
the destination variable. If the variable is defined as an associative
array (using @strong{typeset -A myassoc}), this will be used. Otherwise the
variable will be made into a normal array.
If @emph{variablename} contains multiple names separated by ',' or space,
the names will be the destination variables. The number of names must
be at least the number of jobs.
@node OPTIONS
@chapter OPTIONS
Same as GNU @strong{parallel}, but they are put @emph{after} the destination
variable.
@node SUPPORTED SHELLS
@chapter SUPPORTED SHELLS
@menu
* Bash/Zsh/Ksh/Mksh::
* ash/dash (FreeBSD's /bin/sh)::
@end menu
@node Bash/Zsh/Ksh/Mksh
@section Bash/Zsh/Ksh/Mksh
@menu
* Examples::
* Installation::
@end menu
@node Examples
@subsection Examples
Put output into @strong{myarray}:
@verbatim
parset myarray seq 3 ::: 4 5 6
echo "${myarray[1]}"
@end verbatim
Put output into vars @strong{$seq, $pwd, $ls}:
@verbatim
parset "seq pwd ls" ::: "seq 10" pwd ls
echo "$ls"
@end verbatim
Put output into vars @strong{$seq, $pwd, $ls}:
@verbatim
into_vars=(seq pwd ls)
parset "${into_vars[*]}" ::: "seq 10" pwd ls
echo "$ls"
@end verbatim
Put output into associative array @strong{myassoc} (not supported for mksh):
@verbatim
typeset -A myassoc
parset myassoc seq ::: 4 5 ::: 6 7
echo "${myassoc[4 7]}"
@end verbatim
The commands to run can be an array:
@verbatim
cmd=("echo first" "echo '<<joe \"double space\" cartoon>>'" "pwd")
parset data ::: "${cmd[@]}"
echo "${data[1]}"
echo "${data[2]}"
@end verbatim
@strong{parset} can read from stdin (standard input) if it is a file:
@verbatim
parset res echo < parallel_input_file
@end verbatim
but @strong{parset} can @emph{not} be part of a pipe. In particular this means
it cannot read from a pipe or write to a pipe:
@verbatim
seq 10 | parset res echo Does not work
@end verbatim
but must instead use a tempfile:
@verbatim
seq 10 > parallel_input
parset res echo :::: parallel_input
echo "${res[1]}"
echo "${res[9]}"
@end verbatim
or a FIFO:
@verbatim
mkfifo input_fifo
seq 30 > input_fifo &
parset res echo :::: input_fifo
echo "${res[1]}"
echo "${res[29]}"
@end verbatim
or Bash/Zsh/Ksh process substitution:
@verbatim
parset res echo :::: <(seq 100)
echo "${res[1]}"
echo "${res[99]}"
@end verbatim
@node Installation
@subsection Installation
Put this in the relevant @strong{$HOME/.bashrc} or @strong{$HOME/.zshenv} or @strong{$HOME/.kshrc}:
@verbatim
. `which env_parallel.bash`
. `which env_parallel.zsh`
source `which env_parallel.ksh`
@end verbatim
E.g. by doing:
@verbatim
echo '. `which env_parallel.bash`' >> $HOME/.bashrc
echo '. `which env_parallel.zsh`' >> $HOME/.zshenv
echo 'source `which env_parallel.ksh`' >> $HOME/.kshrc
@end verbatim
or by doing:
@verbatim
env_parallel --install
@end verbatim
@node ash/dash (FreeBSD's /bin/sh)
@section ash/dash (FreeBSD's /bin/sh)
@menu
* Examples 1::
* Installation 1::
@end menu
@node Examples 1
@subsection Examples
ash does not support arrays.
Put output into vars @strong{$seq, $pwd, $ls}:
@verbatim
parset "seq pwd ls" ::: "seq 10" pwd ls
echo "$ls"
@end verbatim
@strong{parset} can read from stdin (standard input) if it is a file:
@verbatim
parset res1,res2,res3 echo < parallel_input_file
@end verbatim
but @strong{parset} can not be part of a pipe. In particular this means it
cannot read from a pipe or write to a pipe:
@verbatim
seq 3 | parset res1,res2,res3 echo Does not work
@end verbatim
but must instead use a tempfile:
@verbatim
seq 3 > parallel_input
parset res1,res2,res3 echo :::: parallel_input
echo "$res1"
echo "$res2"
echo "$res3"
@end verbatim
or a FIFO:
@verbatim
mkfifo input_fifo
seq 3 > input_fifo &
parset res1,res2,res3 echo :::: input_fifo
echo "$res1"
echo "$res2"
echo "$res3"
@end verbatim
@node Installation 1
@subsection Installation
Put the relevant one of these into @strong{$HOME/.profile}:
@verbatim
. `which env_parallel.sh`
. `which env_parallel.ash`
. `which env_parallel.dash`
@end verbatim
E.g. by doing:
@verbatim
echo '. `which env_parallel.ash`' >> $HOME/.bashrc
@end verbatim
or by doing:
@verbatim
env_parallel --install
@end verbatim
@node EXIT STATUS
@chapter EXIT STATUS
Same as GNU @strong{parallel}.
@node AUTHOR
@chapter AUTHOR
When using GNU @strong{parallel} for a publication please cite:
O. Tange (2011): GNU Parallel - The Command-Line Power Tool, ;login:
The USENIX Magazine, February 2011:42-47.
This helps funding further development; and it won't cost you a cent.
If you pay 10000 EUR you should feel free to use GNU Parallel without citing.
Copyright (C) 2007-10-18 Ole Tange, http://ole.tange.dk
Copyright (C) 2008-2010 Ole Tange, http://ole.tange.dk
Copyright (C) 2010-2023 Ole Tange, http://ole.tange.dk and Free
Software Foundation, Inc.
@node LICENSE
@chapter LICENSE
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
at your option any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
@menu
* Documentation license I::
* Documentation license II::
@end menu
@node Documentation license I
@section Documentation license I
Permission is granted to copy, distribute and/or modify this
documentation under the terms of the GNU Free Documentation License,
Version 1.3 or any later version published by the Free Software
Foundation; with no Invariant Sections, with no Front-Cover Texts, and
with no Back-Cover Texts. A copy of the license is included in the
file LICENSES/GFDL-1.3-or-later.txt.
@node Documentation license II
@section Documentation license II
You are free:
@table @asis
@item @strong{to Share}
@anchor{@strong{to Share}}
to copy, distribute and transmit the work
@item @strong{to Remix}
@anchor{@strong{to Remix}}
to adapt the work
@end table
Under the following conditions:
@table @asis
@item @strong{Attribution}
@anchor{@strong{Attribution}}
You must attribute the work in the manner specified by the author or
licensor (but not in any way that suggests that they endorse you or
your use of the work).
@item @strong{Share Alike}
@anchor{@strong{Share Alike}}
If you alter, transform, or build upon this work, you may distribute
the resulting work only under the same, similar or a compatible
license.
@end table
With the understanding that:
@table @asis
@item @strong{Waiver}
@anchor{@strong{Waiver}}
Any of the above conditions can be waived if you get permission from
the copyright holder.
@item @strong{Public Domain}
@anchor{@strong{Public Domain}}
Where the work or any of its elements is in the public domain under
applicable law, that status is in no way affected by the license.
@item @strong{Other Rights}
@anchor{@strong{Other Rights}}
In no way are any of the following rights affected by the license:
@itemize
@item Your fair dealing or fair use rights, or other applicable
copyright exceptions and limitations;
@item The author's moral rights;
@item Rights other persons may have either in the work itself or in
how the work is used, such as publicity or privacy rights.
@end itemize
@end table
@table @asis
@item @strong{Notice}
@anchor{@strong{Notice}}
For any reuse or distribution, you must make clear to others the
license terms of this work.
@end table
A copy of the full license is included in the file as
LICENCES/CC-BY-SA-4.0.txt
@node DEPENDENCIES
@chapter DEPENDENCIES
@strong{parset} uses GNU @strong{parallel}.
@node SEE ALSO
@chapter SEE ALSO
@strong{parallel}(1), @strong{env_parallel}(1), @strong{bash}(1).
@bye
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