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|
#!/bin/sh
set -eu
usage() {
cat <<-'EOF'
Usage:
min NUMBER...
min -h
EOF
}
help() {
cat <<-'EOF'
Options:
-h, --help show this message
NUMBER the list of numbers to get the min from
Get the minimun number from the given values.
Examples:
Get the minimum number from a list:
$ min 5 3 9 9 4
3
Get the minimum number when negative numbers are given
$ min -- -3 -5
-5
Get the minimum number given a single number
$ min 8
8
The minimum default number:
$ min
0
EOF
}
for flag in "$@"; do
case "$flag" in
(--)
break
;;
(--help)
usage
help
exit
;;
(*)
;;
esac
done
while getopts 'h' flag; do
case "$flag" in
(h)
usage
help
exit
;;
(*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
if [ -z "${1:-}" ]; then
echo 0
exit
fi
N="$1"
for n in "$@"; do
N=$((N < n ? N : n))
done
printf '%s\n' "$N"
|
