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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
Get the minimun number from the given values.
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=$((N < n ? N : n))
done
echo "$N"
|
