please can any one help me bundle several files into one Post: 302072110

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Top Forums Shell Programming and Scripting please can any one help me bundle several files into one Post 302072110 by swissnez on Thursday 27th of April 2006 02:13:51 PM

04-27-2006

Registered User

To be honest the CPU is irrelavant but its a demonstatration script

$ enshar README cars Unix > eg.shar
$ mailx -s 'Re: Please send me your brilliant stuff' \
> p.scott@shu.ac.uk < eg.shar
$

You have to:

o work out how to use the shar file to extract the files it
contains,

o work out how it works, and

o write a shell script called `enshar' to produce shar files to
exactly the same format. (But your's won't have been e-mailed, so
they won't have any e-mail headers!)

Notice that `enshar' doesn't generate files directly; it only sends to
standard output. In the example, `eg.shar' was created because the
user redirected `enshar's output into `eg.shar'.

If `enshar' finds an error, it outputs an error message and executes an
`exit n'. The required error messages and the values of `n' are as
follows:

1 Usage: enshar file [ ... ]

2 enshar: <parameter>: can't be a pathname

3 enshar: <parameter>: is a directory

4 enshar: <parameter>: doesn't exist

5 enshar: <parameter>: can't be read

6 enshar: <parameter>: can't enshar

Notes:

o The first error message is given if the script is called without
parameters.

o The second error message is given if a parameter has a `/' character
in it.

o Error messages three to five are given if the file specified by a
parameter is: a directory, non-existant or unreadable.

o Error message six is given if the file specified by the parameter
contains the line that is used as the `here document' delimiter.

o `enshar' doesn't need to check all its parameters before generating
any output. That is, it can fail after outputting part of the shar
file. It would be an error for `enshar' to output anything else after
generating an error message.

6 In error messages two to six `<parameter>' should be replaced by the
value of the actual parameter that caused the problem.

swissnez

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unshar

UNSHAR(1)						      General Commands Manual							 UNSHAR(1)

NAME

       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

       shar(1)

DIAGNOSTICS

       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.

REPORTING BUGS

       Report bugs to <bug-gnu-utils@gnu.org>.	Please put sharutils in the subject line.  It helps to spot the message.

								September 10, 1995							 UNSHAR(1)