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 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
              notice.

OPTION PRESETS

       Any option that is not marked as not presettable may be  preset  by  loading  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.