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Full Discussion: Shell script that runs a random shell script
Top Forums Shell Programming and Scripting Shell script that runs a random shell script Post 302534001 by agama on Sunday 26th of June 2011 10:41:07 AM
Old 06-26-2011
Rather than maintaining a case of 60 lines in your script, and making it easy to add/change the words/strings later, you could try something like this:

Code:
#!/usr/bin/env ksh

biscuits=/path/filename          # name of file with one string per line
nstr=$( wc -l <$biscuits)        # count number of biscuits (cookies in the US)
if (( $nstr > 0 ))                   # prevent disaster on an empty file
then
    rn=$(( ($RANDOM % $nstr) + 1 ))      # compute a random one based on the number of biscuits
    rstr=$( tail -$rn $biscuits | head -1 )    # read the biscuit
    echo $rstr                         # for testing
    echo $rstr >>/path/target-file
fi

With this you can modify your strings later without needing to retest your script. You could also use the same script with different lists of words/strings.

Have fun!
 

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LEARN ABOUT LINUX

shcomp

SHCOMP(1)						    User Environment Utilities							 SHCOMP(1)

NAME

       shcomp - compile a ksh93 shell script

SYNOPSIS

       shcomp [ options ] [infile] [outfile]]

ORIGIN OF THIS MAN PAGE

       This man page was written by Christophe Martin <Schplurtz@free.fr> for the Debian GNU/Linux system. It is based on "shcomp --man" output.

DESCRIPTION

       Unless  -D  is  specified,  shcomp takes a shell script, infile, and creates a binary format file, outfile, that ksh93 can read and execute
       with the same effect as the original script.

       Since aliases are processed as the script is read, alias definitions whose value requires variable expansion will not work correctly.

       If -D is specified, all double quoted strings that are preceded by $ are output. These are the messages	that  need  to	be  translated	to
       locale specific versions for internationalization.

       If  outfile is omitted, then the results will be written to standard output.  If infile is also omitted, the shell script will be read from
       standard input.

OPTIONS

       -D, --dictionary
	      Generate a list of strings that need to be placed in a message catalog for internationalization.

       -n, --noexec
	      Displays warning messages for obsolete or non-conforming constructs.

       -v, --verbose
	      Displays input from infile onto standard error as it reads it.

       --man  Displays this man page on standard error and exits.

       --help Shows a short help message and exits.

EXIT STATUS

       0      Successful completion.

       >0     An error occurred.

DEBIAN WARNING

       On a Debian GNU/Linux system, more than one package may provide ksh. the output of shcomp can only be used by ksh93.  Any other ksh will be
       unable to run the compiled script.

EXAMPLE

       ( echo '#! /bin/ksh93' ; shcomp myscript ) > myscript.bin &&
       chmod 755 myscript.bin
       ./myscript.bin

SEE ALSO

       ksh(1)

IMPLEMENTATION

       version	       shcomp (AT&T Labs Research) 2003-03-02
       author	       David Korn <dgk@research.att.com>
       copyright       Copyright (c) 1982-2005 AT&T Corp.
       license	       http://www.opensource.org/licenses/cpl1.0.txt

KSH93								  Fri Jun 3 2005							 SHCOMP(1)
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