Check if any of the parameters to a bash script match a string
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Track title: CC B Schuberts Piano Sonata No 16 D
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Chapters
00:00 Question
01:05 Accepted answer (Score 82)
01:53 Answer 2 (Score 78)
02:22 Answer 3 (Score 9)
03:15 Answer 4 (Score 5)
03:33 Thank you
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Full question
https://superuser.com/questions/186272/c...
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Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...
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Tags
#linux #unix #bash #shellscript
#avk47
ACCEPTED ANSWER
Score 91
It looks like you're doing option handling in a shell script. Here's the idiom for that:
#! /bin/sh -
# idiomatic parameter and option handling in sh
while test $# -gt 0
do
case "$1" in
--opt1) echo "option 1"
;;
--opt2) echo "option 2"
;;
--*) echo "bad option $1"
;;
*) echo "argument $1"
;;
esac
shift
done
exit 0
(There are a couple of conventions for indenting the ;;
, and some shells allow you to give the options as (--opt1)
, to help with brace matching, but this is the basic idea)
ANSWER 2
Score 88
This worked for me. It does exactly what you asked and nothing more (no option processing). Whether that's good or bad is an exercise for the poster :)
if [[ "$*" == *"YOURSTRING"* ]]
then
echo "YES"
else
echo "NO"
fi
This takes advantage of special handling of $*
and bash super-test [[
…]]
brackets.
ANSWER 3
Score 10
How about searching (with wildcards) the whole parameter space:
if [[ $@ == *'-disableVenusBld'* ]]
then
Edit: Ok, ok, so that wasn't a popular answer. How about this one, it's perfect!:
if [[ "${@#-disableVenusBld}" = "$@" ]]
then
echo "Did not find disableVenusBld"
else
echo "Found disableVenusBld"
fi
Edit2: Ok, ok, maybe this isn't perfect... Think it works only if -param is at the start of the list and will also match -paramXZY or -paramABC. I still think the original problem can be solved very nicely with bash string manipulation, but I haven't quite cracked it here... -Can you??
ANSWER 4
Score 5
disCopperBld=
for x; do
if [ "$x" = "-disCopperBld" ]; then disCopperBld=1; break; fi
done
if [ -n "$disCopperBld" ]; then
...
fi
If you need to test only the parameters starting at $3
, do the search in a function:
## Usage: search_trailing_parameters NEEDLE NUM "$@"
## Search NEEDLE amongst the parameters, skipping $1 through ${$NUM}.
search_trailing_parameters () {
needle=$1
shift $(($2 + 2))
for x; do
if [ "$x" = "$needle" ]; then return 0; fi
done
return 1
}
if search_trailing_parameters -disCopperBld 2 "$@"; then
...
fi
But I wonder why you're trying to do this in the first place, it's not a common need. Usually, you'd process options in order, as in Dennis's answer to your previous question.