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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LEARN ABOUT FREEBSD

shar

SHAR(1) 						    BSD General Commands Manual 						   SHAR(1)

NAME

     shar -- create a shell archive of files

SYNOPSIS

     shar file ...

DESCRIPTION

     The shar command writes a sh(1) shell script to the standard output which will recreate the file hierarchy specified by the command line op-
     erands.  Directories will be recreated and must be specified before the files they contain (the find(1) utility does this correctly).

     The shar command is normally used for distributing files by ftp(1) or mail(1).

EXAMPLES

     To create a shell archive of the program ls(1) and mail it to Rick:

	   cd ls
	   shar `find . -print` | mail -s "ls source" rick

     To recreate the program directory:

	   mkdir ls
	   cd ls
	   ...
	   <delete header lines and examine mailed archive>
	   ...
	   sh archive

SEE ALSO

     compress(1), mail(1), tar(1), uuencode(1)

HISTORY

     The shar command appeared in 4.4BSD.

BUGS

     The shar command makes no provisions for special types of files or files containing magic characters.  The shar command cannot handle files
     without a newline ('
') as the last character.

     It is easy to insert trojan horses into shar files.  It is strongly recommended that all shell archive files be examined before running them
     through sh(1).  Archives produced using this implementation of shar may be easily examined with the command:

	   egrep -v '^[X#]' shar.file

BSD
								   June 6, 1993 							       BSD