Regular Expressions as command line paramteters

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# 1  
Old 08-01-2009
Regular Expressions as command line paramteters

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1. The problem statement, all variables and given/known data:
We have to write a program that uses wget to get pages of a URL and search them for a pattern.

the command for the script should will look like this
> Look4Pattern URL E [L]
URL - url to search
E - string or regular expression to search for (10pts more for regular expression)
L - if not given then search only root level, otherwise recursively search L levels.

3. The attempts at a solution (include all code and scripts):

I have it working fine except when entering a regular expression, if the bar "|" is used, it is interpreted as a pipe instead of an argument, thus if I enter
Look4Pattern Yahoo! grey|gray 1
I would get an error message
bash: gray: command not found

is there anyway to get around this other than make the user enter regular expressions in quotation marks?

4. School (University) and Course Number:
# 2  
Old 08-01-2009
you use the "|" as a pipe in your command. but without seeing the whole code we can't help you further...
# 3  
Old 08-01-2009
You have to keep the shell from parsing the pipe symbol:
$ echo grey|gray
bash: gray: command not found
$ echo 'grey|gray'

# 4  
Old 08-01-2009
I did not think the code was relevant. Thank you for taking the time to help me.

#! /bin/bash
mkdir wGetResults
cd wGetResults
if test "$#" = 2
    tryCmd="wget "$1
if test "$#" = 3
    tryCmd="wget -r -l"$3" "$1
gRepper="egrep -r -l -e "$2" "$cWd1"/"

# 5  
Old 08-01-2009
how do you call the script? give an example with the output...

Last edited by DukeNuke2; 08-01-2009 at 06:46 PM..
# 6  
Old 08-01-2009
Thank you for all of your help, I think pludi answered my question.
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