unshar(1)



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 archive.  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 com-
       mand 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  '#'  charac-
       ter.

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, unpack-
              ing  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 some-
              times 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  con-
              figuration  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 notice.

OPTION PRESETS
       Any option that is not marked as not presettable may be preset by load-
       ing  values  from  configuration  ("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@lists.sourceforge.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 message.

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

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

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

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