v4l2-settings-restore.sh: don't use "echo -n"

Dont' use "echo -n" as it's not POSIX compliant, this fixes two
shellcheck warnings:

In v4l2-settings-restore.sh line 27:
    CTRL=$(echo -n "$setting" | cut -d ' ' -f 1)
                ^-- SC2039: In POSIX sh, echo flags are undefined.

In v4l2-settings-restore.sh line 28:
    VAL=$(echo -n "$setting" | cut -d ' ' -f 2)
               ^-- SC2039: In POSIX sh, echo flags are undefined.

diff --git a/v4l2-settings-restore.sh b/v4l2-settings-restore.sh
index b255da8..cb6b572 100755 (executable)
--- a/v4l2-settings-restore.sh
+++ b/v4l2-settings-restore.sh
@@ -24,8 +24,8 @@ if [ "$ACTION" = "add" ] && [ -f "$SETTINGS_FILE" ];
 then
   while read -r setting;
   do
 then
   while read -r setting;
   do

-    CTRL=$(echo -n "$setting" | cut -d ' ' -f 1)
-    VAL=$(echo -n "$setting" | cut -d ' ' -f 2)
+    CTRL=$(echo "$setting" | tr -d '\n' | cut -d ' ' -f 1)
+    VAL=$(echo "$setting" | tr -d '\n' | cut -d ' ' -f 2)

     v4l2-ctl -d "$DEVNAME" --set-ctrl "${CTRL}=${VAL}"
   done < "$SETTINGS_FILE"
 fi
     v4l2-ctl -d "$DEVNAME" --set-ctrl "${CTRL}=${VAL}"
   done < "$SETTINGS_FILE"
 fi