nixCraft

seaman77 · #1 (**permalink**) 16-03-2009, 03:46 PM

please help me,
I have problem with this script, I don't know what the error with this Syntax 'grep ^i $2 | WC -l'

Write a shell script that checks to see if the first command-line option is –i or –e. If it is –i, the program count the number of lines in the file specified by the second command-line option that begin with the letter i. If the first option is –e, the program count the number of lines in the file specified by the second command-line option that begins with letter e. If the first command-line option is not –i or –e, the program prints a brief error message to the screen.

this is my script

#!/bin/bash
#tarek_20307
#exercise 3:
case $1 in
-i)
count= 'grep ^i $2 | WC -l'
echo "The Number of LINES in The $2 That begin with the letter i IS $count"
;;
-e)
count='grep ^e $2 | wc -l'
echo "The Number of LINES in The < $2 > That begin with the letter e IS< $count >"
;;
*)
echo "error: this option is incorrect "
;;
esac

Please help me to fix the error

nixcraft · #2 (**permalink**) 16-03-2009, 07:46 PM

You need to use backticks (`) and not a single quote ('). Also wc should be in lower case. Here is fixed script

Code:

#!/bin/bash
#tarek_20307
#exercise 3:
case $1 in
-i)
count=`grep ^i $2 | wc -l`
echo "The Number of LINES in The $2 That begin with the letter i IS $count"
;;
-e)
count=`grep ^e $2 | wc -l`
echo "The Number of LINES in The < $2 > That begin with the letter e IS< $count >"
;;
*)
echo "error: this option is incorrect "
;;
esac

Run it as

Code:

./script.name -i filename.txt

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nixCraft

Shell script to count number of lines in file specified by the second command-line

Shell script to count number of lines in file specified by the second command-line

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