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shar(1net) [bsd man page]

SHAR(1net)							  Wang Institute							SHAR(1net)

shar - create file storage archive for extraction by /bin/sh SYNOPSIS
shar [-abcmsuv] [-p prefix] [-d delim] files > archive DESCRIPTION
shar prints its input files with special command lines around them to be used by the shell, /bin/sh , to extract the files later. The out- put can be filtered through the shell to recreate copies of the original files. shar allows directories to be named, and shar prints the necessary commands (mkdir & cd) to create new directories and fill them. shar will not allow existing files to be over-written; such files must be removed by the user extracting the files. OPTIONS
-a All the options. The options: -v -c -b -p <tab>X are implied. -b Extract files into basenames so that files with absolute path names are put into the current directory. This option has strange effects when directories are archived. -c Check file size on extraction by counting characters. An error message is reported to the person doing the extraction if the sizes don't match. One reason why the sizes may not match is that shar will append a newline to complete incomplete last lines; shar prints a message that mentions added newlines. Another reason why the sizes may not match is that some network mail programs remove non-whitespace control characters. shar prints a message that mentions control characters to the extractor. -d Use this as the ``end of file'' delimiter instead of the default. The only reason to change it is if you suspect a file contains the default delimiter: SHAR_EOF. -m Reset the exact protection modes of files when they are extracted (using the chmod program). By default, the extractor's default file modes are used, and executable files (e.g., shell scripts) are made executable. -p Use this as the prefix to each line of the archived files. This is to make sure that special characters at the start of lines are not eaten up by programs like mailers. If this option is used, the files will be extracted with the stream editor sed rather than cat so it is more efficient and portable to avoid setting the prefix, though perhaps less safe if you don't know what is in the files. -s Silent running. All checking and extra output is inhibited. -u Archive the input files with the uuencode format for later extraction with uudecode. This will allow you to send files with control characters in them, but will slow down the extracting. You must be sure that the receiving party has access to uudecode. -v Print verbose feedback messages about what shar is doing to be printed during extraction. Sizes of plain files are echoed to allow a simple validity check. SEE ALSO
sh(1), tar(1), cpio(1), tp(1), uuencode(1), uudecode(1) fpack(1) is a plain-file packer useful for UNIX and MSDOS AUTHOR
Gary Perlman (based on a shell version by James Gosling, with additions motivated by many people on the UNIX network: Derek Zahn, Michael Thompson, H. Morrow Long, Fred Avolio, Gran Uddeborg, Chuck Wegrzyn, nucleus!randy@TORONTO, & Bill McKeeman) LIMITATIONS
shar does not know anything about links between files. UNIX User's Manual March 4, 1986 SHAR(1net)

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UNSHAR(1)						      General Commands Manual							 UNSHAR(1)

unshar - unpack a shar file SYNOPSIS
unshar [ options ] [ file ... ] DESCRIPTION
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
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. --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. -c --overwrite 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. -e --exit-0 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. -f --force The same as -c. SEE ALSO
Any message from the shell may be displayed. 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. September 10, 1995 UNSHAR(1)
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