blob: 9ff343694808cb0781923d8b3bc85f7f59eac1e5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
#!/bin/sh
usage() {
echo "usage: $0 <file> <letter1> [letter2] [letter3] [...]"
exit 1
}
[[ ! -f "$1" ]] && echo "file does not exist" && usage
[[ "$#" -lt 2 ]] && echo "not enough arguments" && usage
file="$1"
shift
for letter in "$@"; do
[[ ! "${#letter}" -eq 1 ]] && echo "argument \"$letter\" too long" && usage
echo "$letter -> `cat $file | tr -cd $letter | wc -c`"
done
|