NAME

       unshar - unpack a shar archive

SYNOPSIS

       unshar [-flag [value]]... [--opt-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..Pp 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) 1994-2013 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.