fix: if sleep is terminated, terminate the pgrp

This embarrasing bug escaped my notice until #21 was raised and I tried
to make the clipboard clearing behavior saner.

`kill` is a bash built-in and `kill 0` sends the default SIGTERM signal
to all processes in the same process group (PGID). If `sleep
$tsn_cliptime` is killed for any reason, `kill 0` should end up killing
`wl-copy` as well. This can be confirmed by manually sending a SIGTERM
to the sleep process.

1 files changed, 1 insertions, 1 deletions

diff --git a/tessen b/tessen
index 5caf939..98886d7 100755
--- a/tessen
+++ b/tessen
@@ -479,7 +479,7 @@ wld_copy() {
       "Copied username to clipboard. Will clear in $tsn_cliptime seconds."
   fi
   {
-    sleep "$tsn_cliptime" || exit 1
+    sleep "$tsn_cliptime" || kill 0
     wl-copy --clear
   } > /dev/null 2>&1 &