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unshar(1)                                   User Commands                                  unshar(1)



NAME
       unshar - unpack a shar archive

SYNOPSIS
       unshar [-flags] [-flag [value]] [--option-name[[=| ]value]] [<file>...]

       The  operands  that  this  program operates on may be specified either on the command line or
       read from standard input, one per line.  In that input, leading and trailing white  space  is
       stripped, blank lines are ignored.  Standard input may not be a terminal.


DESCRIPTION
       Unshar  scans the input files (typically email messages) looking for the start of a shell ar‐
       chive.  If no files are given, then standard input is processed instead.  It then passes each
       archive discovered through an invocation of the shell program to unpack it.

       This program will perform its function for every file named on the command line or every file
       named in a list read from stdin.  The arguments or input names must  be  pre-existing  files.
       The  input  list  may  contain  comments, which are blank lines or lines beginning with a '#'
       character.

OPTIONS
       -d dir, --directory=dir
              unpack into the directory dir.

              The input file names are relative to  the  current  directory  when  the  program  was
              started.   This  option  tells  unshar to insert a cd <dir> commad at the start of the
              shar text written to the shell.

       -c, --overwrite
              overwrite any pre-existing files.

              This option is passed through as an option to  the  shar  file.   Many  shell  archive
              scripts accept a -c argument to indicate that existing files should be overwritten.

       -f, --force
              This is an alias for the --overwrite option.

       -E split-mark, --split-at=split-mark
              split input on split-mark lines.  The default split-mark for this option is:
                   exit 0

              With  this  option, unshar isolates each different shell archive from the others which
              have been placed in the same file, unpacking each in turn, from the beginning  of  the
              file  to  the  end.   Its proper operation relies on the fact that many shar files are
              terminated by a readily identifiable string at the start of the last line.

              For example, noticing that most `.signatures' have a double hyphen ("--")  on  a  line
              right  before them, one can then sometimes use --split-at=--.  The signature will then
              be skipped, along with the headers of the following message.

       -e, --exit-0
              split input on "exit 0" lines.  This option must not appear in combination with any of
              the following options: split-at.

              Most  shell  archives  end  with a line consisting of simply "exit 0".  This option is
              equivalent to (and conflicts with) --split-at="exit 0".

       -D, --debug
              debug the shell code.

              "set -x" will be emitted into the code the shell interprets.

       -h, --help
              Display usage information and exit.

       -!, --more-help
              Pass the extended usage information through a pager.

       -R [cfgfile], --save-opts [=cfgfile]
              Save the option state to cfgfile.  The default is the last configuration  file  listed
              in the OPTION PRESETS section, below.  The command will exit after updating the config
              file.

       -r cfgfile, --load-opts=cfgfile, --no-load-opts
              Load options from cfgfile.  The no-load-opts form will disable the loading of  earlier
              config/rc/ini files.  --no-load-opts is handled early, out of order.

       -v [{v|c|n --version [{v|c|n}]}]
              Output  version  of program and exit.  The default mode is `v', a simple version.  The
              `c' mode will print copyright information and `n' will print the  full  copyright  no‐
              tice.

OPTION PRESETS
       Any option that is not marked as not presettable may be preset by loading values from config‐
       uration ("RC" or ".INI") file(s).  The file "$HOME/.sharrc" will be used, if present.

FILES
       See OPTION PRESETS for configuration files.

EXIT STATUS
       One of the following exit values will be returned:

       0  (EXIT_SUCCESS)
              Successful program execution.

       1  (EXIT_FAILURE)
              There was an error in command usage.

       2  (EXIT_POPEN_PROBLEM)
              cannot spawn or write to a shell process

       3  (EXIT_CANNOT_CREATE)
              cannot create output file

       4  (EXIT_BAD_DIRECTORY)
              the working directory structure is invalid

       5  (EXIT_NOMEM)
              memory allocation failure

       6  (EXIT_INVALID)
              invalid input, does not contain a shar file

       66  (EX_NOINPUT)
              A specified configuration file could not be loaded.

       70  (EX_SOFTWARE)
              libopts  had  an  internal  operational  error.   Please   report   it   to   autogen-
              users AT lists.net.  Thank you.

SEE ALSO
       shar(1)

AUTHORS
       The shar and unshar programs is the collective work of many authors.  Many people contributed
       by reporting problems, suggesting various improvements or submitting actual code.  A list  of
       these people is in the THANKS file in the sharutils distribution.

COPYRIGHT
       Copyright  (C) 1994-2015 Free Software Foundation, Inc. all rights reserved.  This program is
       released under the terms of the GNU General Public License, version 3 or later.

BUGS
       Please put sharutils in the subject line for emailed bug reports.  It helps to spot the  mes‐
       sage.

       Please send bug reports to: bug-gnu-utils AT gnu.org

NOTES
       This manual page was AutoGen-erated from the unshar option definitions.



GNU sharutils (4.15.2)                       30 May 2015                                   unshar(1)