Keith wrote:
>I was wondering if someone could help me with this shell programming
>language question. I am trying to remove some entries from a database
>file.
>Here is what the database file looks like:
>
>Joe,Walsh,134 Mockingbird Way,New Orleans,LA,33456,(444)768-1287
>Becky,Walsh,432 Rodeo Drive Apt C,Hollywood,CA,90312,(555)555-5555
>
>Here is the function that I am using to remove one of the entries.
>Instead of removing only one of the entries it removes both. It does
>this because I am removing the entries by lastname. SO if more than
>one person has the same last name they will all be deleted instead
>of just the one I want. I need to know if there is a way to modify
>this script to delete entries by first and last name, not just the
>last name.
>
>Here is the script.
>
>remove_records() {
> if [ -z "$lastname" ]; then
> echo You must select an address first
> find_ad n
> fi
> if [ -n "$lastname" ]; then
> echo "You are about to delete $firstname $lastname"
> get_confirm && {
> egrep -f "$firstname" "$lastname" $address_file > $temp_file
> mv $temp_file $address_file
> lastname=""
> echo Entry removed
> }
> get_return
> fi
> return
>}
Why `egrep -f $firstname' ?
-f FILE, --file=FILE
Obtain patterns from FILE, one per line. The empty
file contains zero patterns, and therfore matches
nothing.
Presumably you need to test for $firstname as well, if you need to
use it to distinguish entries.
Altered lines are marked thus: <--
remove_records() {
if [ -z "$lastname" ]; then
echo You must select an address first
find_ad n
fi
if [ -n "$lastname" -a -n "$firstname" ]; then <--
echo "You are about to delete $firstname $lastname"
get_confirm && {
grep -v "^$firstname,$lastname," $address_file > $temp_file <--
mv $temp_file $address_file
lastname=""
echo Entry removed
}
get_return
fi
return
}
--
Oliver Elphick [EMAIL PROTECTED]
Isle of Wight http://www.lfix.co.uk/oliver
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"But the wisdom that is from above is first pure, then
peaceable, gentle, and easy to be intreated, full of
mercy and good fruits, without partiality, and without
hypocrisy." James 3:17
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