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UNSHAR.MAN
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1988-02-21
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UNSHAR(1) UNIX Programmer's Manual UNSHAR(1)
NAME
unshar - unpack shell archives from news, mail, notes, etc.
SYNOPSIS
unshar [ -cdirectory ] [ -ddirectory ] [ -f ] [ -n ] [ -s ]
[files]
DESCRIPTION
Unshar removes mail and news header lines from its input,
and feeds the remainder to /bin/sh(1) so that a shell
archive can be properly unpacked. If no files are speci-
fied, unshar reads from standard input. The program is
designed to be useful when unpacking archives directly from
the news or mail systems (e.g., s | unshar).
Unshar normally unpacks its files in the current directory.
Use the ``-c'' option to have the program change to a new
directory before invoking the shell. If the directory does
not exist, it will try to create it. If the directory name
starts with a question mark, then unshar will ask for the
directory name before doing anything; this is most useful
with the environment variable UNSHAREDIR. If the directory
name starts with a tilde, then the value of the HOME
environment variable is inserted in place of that character.
For convenience, the ``-d'' option is a synonym for the
``-c'' option.
Unshar normally complains if the input looks like something
other than a shar file. (Among other things, it checks for
files that resemble C, and Pascal code). It can be fooled,
however, by nonstandard versions of news, notes, etc. The
``-f'' option forces unshar to try unpacking files, even if
they look like something else.
Depending on how the program is installed, unshar may or may
not try to preserve the header part of file ``foo'' into the
name ``foo.hdr'' (if the file is standard input, the name
will be ``UNSHAR.HDR''). Using the Using the ``-s'' option
forces the program to save the headers, while using the
``-n'' option forces it to discard the headers. The file is
appended to, if it already exists, so all headers can be
easily saved in one file.
ENVIRONMENT
HOME Value used if a leading tilde is given in direc-
tory name.
UNSHAREDIR Default value for ``-c'' option.
SEE ALSO
shar(1).
Printed 2/21/88 LOCAL 1