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unshar - unpack a shar file
unshar [ options ] [ file ... ]
Unshar scans mail messages looking for the start of a shell archive. It then passes the
archive through a copy of the shell to unpack it. It will accept multiple files. If no
files are given, standard input is used.
Options have a one letter version starting with - or a long version starting with --. The
exception is --help and --version, which does not have a short version.
Print the version number of the program on standard output, then immediately exits.
--help Print a help summary on standard output, then immediately exits.
-d DIRECTORY --directory=DIRECTORY
Change directory to DIRECTORY before unpacking any files.
Passed as an option to the shar file. Many shell archive scripts (including those
produced by `shar' 3.40 and newer) accepts a -c argument to indicate that existing
files should be overwritten.
This option exists mainly for people who collect many shell archives into a single
mail folder. With this option, `unshar' isolates each different shell archive from
the others which have been put in the same file, unpacking each in turn, from the
beginning of the file towards its end. Its proper operation relies on the fact
that many shar files are terminated by a `exit 0' at the beginning of a line.
Option -e is internally equivalent to -E "exit 0".
-E STRING --split-at=STRING
This option works like -e, but it allows you to specify the string that separates
archives if `exit 0' isn't appropriate.
For example, noticing that most `.signatures' have a `--' on a line right before
them, one can sometimes use `--split-at=--' for splitting shell archives which lack
the `exit 0' line at end. The signature will then be skipped altogether with the
headers of the following message.
The same as -c.
Any message from the shell may be displayed.
The shar and unshar programs is the collective work of many authors. Many people contrib-
uted by reporting problems, suggesting various improvements or submitting actual code. A
list of these people is in the THANKS file in the sharutils distribution.
September 10, 1995 UNSHAR(1)
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