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Full Discussion: Passing arguments to a script
Top Forums Shell Programming and Scripting Passing arguments to a script Post 22981 by Kevin Pryke on Friday 14th of June 2002 05:52:10 AM
Old 06-14-2002
Passing arguments to a script
I've written a script (bgrep) for a more advanced grep command (& attached a cut down version below). I'm trying allow all grep options to be used, or in any combination.

The script works fine if I type say

bgrep -i -files product

it will return a non-case sensitive list of matches for product

however if I type

bgrep -in -files product

I get the same list & no line numbers.

I know why this is happening, it's because the -n option is a valid option for the echo command I am using. I not sure how to get round this. Is there some other command I could use.

I'd appreciate any advice, feel free to criticise.
Code:
#!/bin/sh
>grep_args
files=false
forms=false
text=""

while [ $# -gt 0 ]
do
        case "$1" in
                -?)     echo $1 > bgrep.tmp
                        paste -d" " bgrep.tmp grep_args > grep_args.tmp
                        mv grep_args.tmp grep_args;;

                -files) files=true;;

                -forms) forms=true;;

                -*)     echo "usage :$0 [-grepoption] [-files] [-forms] text"
                        exit 1;;

                *)      text=$@
                        break;;
        esac
        shift
done

if [ $files = true ]
then
        echo files:
        find . -name "*.f" -print|xargs grep `cat grep_args` "$text"|pg
fi

if [ $forms = true ]
then
        echo forms:
        find . -name "*.s" -print|xargs grep `cat grep_args` "$text"|pg
fi

Last edited by Perderabo; 06-14-2002 at 09:54 AM..
 

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LEARN ABOUT OPENSOLARIS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a    Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.11							    30 Jan 2004 							 script(1)
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