Make sh scrips POSIX compliant

Using shellcheck, I went through all of them to make them standards
compliant. I also tested as many as I could.

1 files changed, 13 insertions, 4 deletions

diff --git a/t b/t
index fd62d0a..be59d54 100755
--- a/t
+++ b/t
@@ -4,26 +4,35 @@ unset KILL SPAWN
 
 MODE="t"
 
+printhelp () {
+  printf "t: toggle/restart/kill a process\n"
+  printf "t [-tr] [--] process [proc_args]\n"
+  printf "\t-t) toggle (kill if running, start if not)\n"
+  printf "\t-r) restart (kill and start again whether running or not)\n"
+  exit 1;
+}
+
 while getopts "tr-" o; do case "${o}" in
   t) MODE="t" ;;
   r) MODE="r" ;;
   -) break ;;
+  *) printhelp ;;
 esac done
 
 SPAWN="$(echo "$@" | sed 's/^.*-[-tr] //')"
-KILL="$(echo $SPAWN | cut -d' ' -f1)"
+KILL="$(echo "$SPAWN" | cut -d' ' -f1)"
 
-[ -z "${MODE}" -o -z "$SPAWN" ] && exit
+[ -z "${MODE}" ] || [ -z "$SPAWN" ] && exit
 case "${MODE}" in
   t)
     if pgrep -x "$KILL"; then
-      killall "$KILL" 2>&1 >/dev/null
+      killall "$KILL" >/dev/null 2>&1
     else
       $SPAWN &
     fi
     ;;
   r)
-    killall "$KILL" 2>&1 >/dev/null
+    killall "$KILL" >/dev/null 2>&1
     sleep 0.1
     $SPAWN &
     ;;