07-08-2007
assigning command output to a shell variable
I have the sql file cde.sql with the below contents:
abcdefghij
abcwhendefothers
sdfghj
when no one else
when others
wwhen%others
exception when others
Now I want to search for the strings containing when others together and ceck whether that does not occur more than once in the file.
I have a shell script file sample1 as below:
#!/bin/sh
x=$(basename $1)
y=$(dirname $1)
echo "filename: $x"
echo "Dir name: $y"
file_ext=${x##*.}
if [ ! -f $x ]; then
printf "File $x is not a valid file"
exit
fi
if [ $file_ext = sql ] || [ $file_ext = pls ] || [ $file_ext = xml ]; then
printf "This file has extension $file_ext\n";
grep -ciw 'when others' $x>when_others_exception
fi
Here in the if loop i have found the occurrence of when others using grep command.
As of nw, i had written the o/p of that command to a file "when_others_exception".
How can i assign the o/p of the grep command to any shell variable.
I searched a lot on the web n documents and unable to find how do we ssign the o/p of any shell command to a shell variable.
Doesn't this a very bad coding.
Can any one tell me how do we assign o/p of any shell command to a shell variable.
And also here i ahd written the contents to a file "when_others_exception".
Can any one tell me how do we read that value and compare with any numeral.
Thanks,
Kiran.
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