every

#!/bin/sh
## Run the given command every time-spec, command error will not stop the loop, will use 'sleepy' if available
# Usage: $0 timespec command...

ts="$1"
shift

if type -p sleepy >&/dev/null; then
	sleep=sleepy
else
	sleep=sleep
fi

if [ -z "$ts" ]; then
	echo "ERROR: empty timespec"
fi

echo "Run: $@"
while :; do
	"$@"
	$sleep "$ts"
done