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.