Add tentative implementation of spawn(8)

This commit is contained in:
C. McEnroe 2020-08-13 20:38:34 -04:00
parent 021003a3e0
commit 2050d668af

34
spawn.sh Normal file
View File

@ -0,0 +1,34 @@
#!/bin/sh
set -eu
die() {
echo "${0}:" "$@" >&2
exit 1
}
: ${SPAWND_PIPE:=/var/run/spawnd.pipe}
while getopts 'c:' opt; do
case "${opt}" in
(c) SPAWND_PIPE=$OPTARG;;
(?) exit 1;;
esac
done
shift $((OPTIND - 1))
if ! [ -p "${SPAWND_PIPE}" ]; then
die "${SPAWND_PIPE} is not a named pipe"
fi
[ $# -lt 1 ] && die 'action required'
[ $# -lt 2 ] && die 'service name required'
action=$(echo "${1}" | tr 'A-Z' 'a-z')
for valid in start stop restart status $(kill -l | tr 'A-Z' 'a-z'); do
[ "${action}" = "${valid}" ] && break
done
if [ "${action}" != "${valid}" ]; then
die "${action} is not a valid action or signal"
fi
echo "$@" > "${SPAWND_PIPE}"