Programming Forums > Script Programming > Bash / Shell Scripting

trufla · Apr 5th, 2005, 9:38 AM

Hello all!

I was writing a simple script to search text files for data using grep and I decided to have a go at writing a script that piped unix commands to grep too. I am having problems though.

I think the problem is in the storing of user input in a variable.

For example:- If I wanted to store

who|grep ^l

in a variable called $pipe

is the spacing of the command an issue when stored in variables or am I completely off the point?

This is my code:-

(Toggle Plain Text)

#!/bin/bash
#Filename: piping : Author: L.Pearce

function pipefunction
{
 $pipe
}

echo
echo
echo "Type command in full:"
echo "1. Type unix command you want to pipe to grep."
echo "2. Type the 'pipe' symbol and name of tool you are using."
echo "3. Type the metachars and criteria to search with here:"
         read pipe

#:::How can the command stored in that variable be run:::
#------------------------------------------------------------------------
#By calling the function "pipefunction"

             pipefunction
echo
echo
echo "The entries above match your search"
echo
echo

I get this error:-

(Toggle Plain Text)

./piping: line 8: who|grep: command not found

Cheers,

Trufla

Apr 5th, 2005, 9:38 AM	#1
trufla Newbie Join Date: Apr 2005 Posts: 6 Rep Power: 0	Piping in a script Hello all! I was writing a simple script to search text files for data using grep and I decided to have a go at writing a script that piped unix commands to grep too. I am having problems though. I think the problem is in the storing of user input in a variable. For example:- If I wanted to store who\|grep ^l in a variable called $pipe is the spacing of the command an issue when stored in variables or am I completely off the point? This is my code:- (Toggle Plain Text) #!/bin/bash #Filename: piping : Author: L.Pearce function pipefunction { $pipe } echo echo echo "Type command in full:" echo "1. Type unix command you want to pipe to grep." echo "2. Type the 'pipe' symbol and name of tool you are using." echo "3. Type the metachars and criteria to search with here:" read pipe #:::How can the command stored in that variable be run::: #------------------------------------------------------------------------ #By calling the function "pipefunction" pipefunction echo echo echo "The entries above match your search" echo echo #!/bin/bash #Filename: piping : Author: L.Pearce function pipefunction { $pipe } echo echo echo "Type command in full:" echo "1. Type unix command you want to pipe to grep." echo "2. Type the 'pipe' symbol and name of tool you are using." echo "3. Type the metachars and criteria to search with here:" read pipe #:::How can the command stored in that variable be run::: #------------------------------------------------------------------------ #By calling the function "pipefunction" pipefunction echo echo echo "The entries above match your search" echo echo I get this error:- (Toggle Plain Text) ./piping: line 8: who\|grep: command not found ./piping: line 8: who\|grep: command not found Cheers, Trufla Last edited by trufla; Apr 5th, 2005 at 9:41 AM.

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Switch to Hybrid Mode Threaded Mode

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Programming Forums > Script Programming > Bash / Shell Scripting

Piping in a script