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, 9 insertions, 0 deletions

diff --git a/hyprswap.sh b/hyprswap.sh
index b9d48b2..f7b8d64 100755
--- a/hyprswap.sh
+++ b/hyprswap.sh
@@ -1,7 +1,16 @@
 #!/bin/sh
+
+printhelp () {
+  printf "hyprswap.sh: swap two one window columns in hyprscrolling\n"
+  printf "\t-l) swap focused column to the left\n"
+  printf "\t-r) swap focused column to the right\n"
+  exit 1
+}
+
 while getopts "lr" o; do case "${o}" in
   l) DIR='l' ;;
   r) DIR='r' ;;
+  *) printhelp ;;
 esac done
 
 case "$DIR" in