A simpler approach

Signed-off-by: fbt <fbt@fleshless.org>

examples/ssm.conf

@@ -1,11 +1,37 @@
 # This is actually a bash script
-# Everything in ssm is a bash script.
 
-# Enable cgroup-related functions.
+# Where to search for services, works as a PATH-like array.
-# This requires quite specific setup that is undocumented as of yet, sorry.
+#service_path = "$XDG_CONFIG_HOME/ssm/services" /etc/ssm/services "$rundir/services" /usr/share/ssm/services
-#cgroups = 0
 
-# You can also set service-level options here, as local defaults.
+# Service defaults
-# I really do not advise doing that, but you *can*.
+# Respawn the service if it exits
-# For example:
+#service_respawn = 0
-#service_workdir = /
+
+# Working directory
+#service_workdir = '/'
+
+# How long do we wait for the service to stop
+#service_stop_timeout = 30
+
+# How long do we wait for the service to get ready
+#service_ready_timeout = 15
+
+# The signal to send to reload the service
+#service_reload_signal = 1
+
+# The signal to send to stop the service
+#service_stop_signal = 15
+
+# Enable cgroup-related functions
+# Only works with cgroups v2 and a helper.
+# Basically, don't.
+#
+#cgroups = 1
+
+# Refuse to start the service if its cgroup is not empty
+#service_cgroup_exclusive = 0
+
+# Wait on all the members of the cgroup to exit when stopping the service.
+#service_cgroup_wait = 0
+
+#service_cgroup_strict = 0

ssm

@@ -143,10 +143,12 @@ run_service_action() {
 
 spawn() {
 	if [[ $service_logfile_out == "$service_logfile_err" ]]; then
-		exec "$@" >"$service_logfile_out" 2>&1
+		exec 3>"$service_logfile_out"
 	else
-		exec "$@" >"$service_logfile_out" 2>"$service_logfile_err"
+		exec 3>"$service_logfile_err"
 	fi
+
+	exec "$@" >"$service_logfile_out" 2>&3
 }; readonly spawn;
 
 cgroup_get_procs() {
@@ -243,7 +245,7 @@ svc() {
 		# One service failure, two service failures...
 		if service_success_exit u "$job_exit"; then
 			job_success = 1
-			(( fail_counter )) && fail_counter--
+			(( fail_counter )) && fail_counter=0
 		else
 			job_success = 0
 			fail_counter++
@@ -592,7 +594,6 @@ var service_pid \
 	service_cgroup_name \
 	service_cgroup_procs \
 	service_cgroup_path \
-	service_signals_passthru \
 	service_config_current \
 	cgroup_home \
 	failed_deps \
@@ -614,6 +615,7 @@ var flag_reset_exit = 0
 var flag_reread_service = 0
 var flag_forget_service = 0
 var flag_load_service = 0
+var flag_no_netns = 0
 
 ## check for some environment stuff
 var EDITOR := 'vim'
@@ -628,7 +630,6 @@ var service_workdir = '/'
 var service_stop_timeout = 30
 var service_stop_command = kill -n "\$service_stop_signal" "\$job_pid"
 var service_ready_timeout = 15
-var service_signals = 1 10 12
 var service_reload_signal = 1
 var service_stop_signal = 15
 var service_cgroup_exclusive = 0 # Refuse to start the service if its cgroup is not empty
@@ -728,6 +729,9 @@ while (( $# )); do
 		(-i|--info)
 			action = 'info';;
 
+		(--no-netns)
+			flag_no_netns = 1;;
+
 		(--) shift; break;;
 		(-*) printf 'Unknown key: %s\n' "$1" >&2; exit 1;;
 		(*) break;;
@@ -824,6 +828,11 @@ flag_reset_exit && { reset-exit; die $?; }
 # Get the service config
 source -- "$service_config" "${@:3}" || die 7 "Failed to read the service config: $service_config"
 
+# Rexec ourselves in the requested netns
+flag_no_netns || {
+	[[ $service_netns ]] && exec ip netns exec "$service_netns" "$0" --no-netns "$service_name" "$@"
+}
+
 # “Load” the service into memory
 if ! service_config == "$service_config_current" && service_remember; then
 	cat "$service_config" > "$rundir/current/$service_name"