ref

home/user/.tmux/example-background-job

@@ -1,7 +1,6 @@
 #!/bin/sh
 
 set -eu
-set -m  # enable background jobs
 
 readonly SESSION=example-background-job
 readonly MAINW=1
@@ -19,12 +18,7 @@ temp_script="$(mktemp)"
 readonly temp_script
 cat > "${temp_script}" << EOF
 #!/bin/sh
-
-cleanup() {
-    rm \$0  # remove self after exit
-}
-
-trap cleanup EXIT
+rm \$0
 
 sleep 3
 tmux send-keys -t "${SESSION}:${MAINW}.1" 'echo hello' Enter
@@ -33,4 +27,4 @@ tmux kill-session -t "${SESSION}"
 EOF
 
 chmod +x "${temp_script}"
-nohup "${temp_script}" >/dev/null &  # run in background
+setsid -f "${temp_script}"