Solved

Using shell script for CGI

Posted on 1998-12-04
9
258 Views
Last Modified: 2013-12-25
I want to use a shell script as a cgi that basically GREPs
a text file.  I can use $QUERY_STRING in the grep statement,
but if I call this script from a form and pass it a value,
what's the easiest way of stripping the name= prefix from the value of QUERY_STRING?  I only need to pass one value.

Here's the basic script:

#!/bin/sh
echo Content-type: text/html
echo
echo '<HEAD><TITLE>Search</TITLE></HEAD>'
echo '<P>'
echo Searching on: $QUERY_STRING
echo '<P>'
echo '<H4><PRE>'
grep $QUERY_STRING /somedir/myfile.txt
echo '</PRE></H4>'

Calling the cgi as a standalone URL works, but with a FORM the name= is prepended to the query - how can I reference everything after the '=' in the GREP?
0
Comment
Question by:wisdom042597
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 7
  • 2
9 Comments
 
LVL 8

Expert Comment

by:MaDdUCK
ID: 1829945
try:
grep "perl -F"name:" -ane 'print $F[1];" myfile.txt
0
 
LVL 8

Expert Comment

by:MaDdUCK
ID: 1829946
arg---
I mean:

perl -F"name:" -ane 'system("grep $F[1] myfile.txt")'

sorry.
0
 
LVL 8

Expert Comment

by:MaDdUCK
ID: 1829947
god, I am dumb today.
last try:

echo $QUERY_STRING | perl -F"name:" -ane 'system("grep $F[1] myfile.txt")'
0
Webinar: Aligning, Automating, Winning

Join Dan Russo, Senior Manager of Operations Intelligence, for an in-depth discussion on how Dealertrack, leading provider of integrated digital solutions for the automotive industry, transformed their DevOps processes to increase collaboration and move with greater velocity.

 
LVL 1

Author Comment

by:wisdom042597
ID: 1829948
I'd prefer a shell-based solution, not using Perl.  I don't want to call Perl and allocate 500+k of memory for such a simple operation.
0
 
LVL 8

Accepted Solution

by:
MaDdUCK earned 50 total points
ID: 1829949
then experiment with
echo $QUERY_STRING | cut -f 2 -d: -s
which will return what you are looking for.
0
 
LVL 8

Expert Comment

by:MaDdUCK
ID: 1829950
echo "name:ma" | cut -f 2 -d= -s
0
 
LVL 8

Expert Comment

by:MaDdUCK
ID: 1829951
argh!
I am wild again.
I mean
echo $QUERY_STRING | cut -f 2 -d= -s

sorry sorry
0
 
LVL 1

Author Comment

by:wisdom042597
ID: 1829952
Thanks - this does work.  It would be nice if you explained more about how it works and how to customize it.  I modified my script to set another environment variable equal to the results of the operation so I could use the processed data in multiple statements.
0
 
LVL 8

Expert Comment

by:MaDdUCK
ID: 1829953
the best way to find out is to type 'man cut' in UNIX. cut is a utility which is intended to split strings into parts.
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article covers the basics of the Sass, which is a CSS extension language. You will learn about variables, mixins, and nesting.
SASS allows you to treat your CSS code in a more OOP way. Let's have a look on how you can structure your code in order for it to be easily maintained and reused.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
Learn how to create flexible layouts using relative units in CSS.  New relative units added in CSS3 include vw(viewports width), vh(viewports height), vmin(minimum of viewports height and width), and vmax (maximum of viewports height and width).

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question