wait what how

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

README.md

@@ -1,4 +1,8 @@
-spark-rc
-========
+# spark-rc
 
 A simple rc script to kickstart your system.
+
+## depends
+
+* Enabled sysrq or halt from suckless.org's ubase.
+* /proc support.

rc.conf

@@ -1,21 +1,45 @@
-# System-wide configuration
-export PATH='/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin'
+# A default PATH
+export PATH='/usr/local/bin:/usr/local/sbin:/usr/bin'
+
+# Locale
+export LC_ALL='en_US.UTF-8'
 
 # Hostname
-cfg_hostname='changeme'
+cfg_hostname='spark'
 
 # Timezone
-# Change this to yours
+# Uncomment and change this to yours
 #cfg_timezone='Europe/Moscow'
 
-# Services
-cfg_services+=( 'fsck' 'mount' 'sysctl' 'rsyslogd' ) # Services that need tp be started in an order
-cfg_services+=( '@lo.iface' '@scron' '@sshd' ) # These start in parallel.
-cfg_services+=( @agetty-tty{2..6} ) # Comment this if your init starts something on the ttys itself.
-cfg_services+=( 'rc.local' ) # Traditionally, rc.local starts last. Technically here it doesn't. Not quite :)
+# Services that start with @ are executed in parallel
+cfg_services+=(
+	'fsck' 'mount' 'sysctl' 'rsyslogd'
+	'@lo.iface' '@scron' @agetty-tty{2..6}
+)
 
-# Add modules you want to be loaded at boot time here
+# Uncomment and add modules you want to be loaded at boot time here
 #cfg_modules=(  )
 
 # Make C-A-D perform a soft reset
 ctrlaltdel soft
+
+# Virtual filesystems
+cfg_mounts=(
+	'run:tmpfs:/run'
+	'tmp:tmpfs:/tmp'
+
+	'proc:proc:/proc:defaults,hidepid=2'
+	'sys:sysfs:/sys'
+
+	'dev:devtmpfs:/dev'
+	'pts:devpts:/dev/pts:noexec,nosuid,gid=5,mode=0620'
+	'mqueue:mqueue:/dev/mqueue:noexec,nosuid,nodev'
+	'shm:tmpfs:/dev/shm:defaults,mode=0777'
+)
+
+# Some temporary directories and files
+cfg_tmpdirs+=( '/run/lock' '/run/lock/lvm' '/run/lvm' '/run/user' )
+cfg_tmpfiles+=( '/run/utmp' )
+
+# How long do we wait for all processes to die nicely?
+cfg_killall5_timeout=30

rc.in

@@ -1,30 +1,5 @@
 #!@BASH_PATH@
-declare -A cfg_mounts
-
-# Default virtual mounts for linux systems
-cfg_mounts[proc]='proc:/proc'
-cfg_mounts[run]='tmpfs:/run'
-cfg_mounts[sys]='sysfs:/sys'
-
-# devfs and its children
-cfg_mounts[dev]='devtmpfs:/dev'
-cfg_mounts[pts]='devpts:/dev/pts:noexec,nosuid,gid=5,mode=0620'
-cfg_mounts[mqueue]='mqueue:/dev/mqueue:noexec,nosuid,nodev'
-cfg_mounts[shm]='tmpfs:/dev/shm:defaults,mode=0777'
-
-# Some temporary directories
-cfg_tmpdirs+=( '/run/lock' '/run/lock/lvm' '/run/lvm' '/run/user' )
-
-# And temporary files
-cfg_tmpfiles+=( '/run/utmp' )
-
-# Default XDG_RUNTIME_DIR for all non-system users
-# rtkit:x:133:133:RealtimeKit:/proc:/sbin/nologin
-while IFS=':' read -r _ _ uid gid _; do
-	if (( uid >= 1000 )); then
-		cfg_tmpdirs+=( "/run/user/$uid:700:$uid:$gid" )
-	fi
-done < /etc/passwd
+# vim: ft=zsh
 
 # Functions
 rc.rescue() { exec "${cfg_rc_rescue_shell:-"$SHELL"}"; }
@@ -52,15 +27,24 @@ rc.tmpfiles() {
 	done
 }
 
-rc.mount_misc() {
-	for fs in "${!cfg_mounts[@]}"; do
-		echo "$fs" | while IFS=':' read fs_type mountpoint mount_options; do
-			[[ "$mount_options" ]] || { mount_options='defaults'; }
+rc.mount() {
+	for fs in "${cfg_mounts[@]}"; do
+		echo "$fs" | while IFS=':' read device fs_type mountpoint mount_options; do
+			if mountpoint -q "$mountpoint"; then
+				if [[ "$mount_options" ]]; then
+					mount -o "remount,$mount_options" "$mountpoint"
+				fi
+			else
+				if ! [[ -d "$mountpoint" ]]; then
+					mkdir -p "$mountpoint"
+				fi
 
-			mountpoint -q "$mountpoint" || {
-				[[ -d "$mountpoint" ]] || { mkdir -p "$mountpoint"; }
-				mount "$fs" -n -t "$fs_type" -o "$mount_options" "$mountpoint"
-			}
+				if ! [[ "$mount_options" ]]; then
+					mount_options='defaults'
+				fi
+
+				mount "$device" -n -t "$fs_type" -o "$mount_options" "$mountpoint"
+			fi
 		done
 	done
 }
@@ -117,10 +101,10 @@ rc.services_stop() {
 
 rc.stop_everything() {
 	echo "Politely asking all processes to shut down..."
-	killall5 -15; sleep 3
+	killall5 -s 15 -w "$cfg_killall5_timeout"
 
 	echo "Killing the remaning ones..."
-	killall5 -9
+	killall5 -s 9
 }
 
 rc.unmount_everything() {
@@ -134,7 +118,7 @@ rc.remount_root() {
 }
 
 rc.boot() {
-	rc.mount_misc
+	rc.mount
 	rc.tmpfiles
 	rc.hostname
 	rc.timezone
@@ -145,15 +129,27 @@ rc.boot() {
 }
 
 rc.halt() {
+	if type -P halt &>/dev/null; then
+		function rc.halt_poweroff { halt -p; }
+		function rc.halt_reboot { halt -r; }
+	elif (( $(</proc/sys/kernel/sysrq) )); then
+		function rc.halt_poweroff { echo 'o' > /proc/sysrq-trigger; }
+		function rc.halt_reboot { echo 'b' > /proc/sysrq-trigger; }
+	else
+		printf 'Cannot halt, please install halt from suckless.org ubase or enable sysrq.\n'
+		return 1
+	fi
+
 	case "$action" in
-		poweroff|shutdown) echo 'o' > /proc/sysrq-trigger;;
 		halt) :;;
-		reboot|*) echo 'b' > /proc/sysrq-trigger;;
+		poweroff|shutdown) rc.halt_poweroff;;
+		reboot|*) rc.halt_reboot;;
 	esac
 }
 
 rc.sync() {
 	echo "Syncing disks."
+	sync
 }
 
 rc.shutdown() {
@@ -188,6 +184,16 @@ rc.timezone() {
 rc.main() {
 	source "@ETC@/rc.conf"
 
+	# Default XDG_RUNTIME_DIR for all non-system users
+	# rtkit:x:133:133:RealtimeKit:/proc:/sbin/nologin
+	# Also add one for root
+	cfg_tmpdirs+=( "/run/user/0:700:0:0" )
+	while IFS=':' read -r _ _ uid gid _; do
+		if (( uid >= 1000 )); then
+			cfg_tmpdirs+=( "/run/user/$uid:700:$uid:$gid" )
+		fi
+	done < /etc/passwd
+
 	action="${1:-boot}"
 
 	case "$action" in

tools/killall5.in

@@ -37,14 +37,60 @@ get_procs_to_kill() {
 	done
 }
 
+pids_exist() {
+	for i in "$@"; do
+		if [[ -d "/proc/$i" ]]; then
+			return 0
+		fi
+	done
+
+	return 1
+}
+
+pid_wait() {
+	declare counter
+
+	while pids_exist "$@"; do
+		if (( counter == timeout )); then
+			return 1
+		fi
+
+		sleep 1
+
+		(( counter++ ))
+	done
+}
+
 main() {
+	timeout=30
+	signal=15
+
+	while (( $# )); do
+		case $1 in
+			-w)
+				flag_wait=1
+				timeout=$2
+				shift
+			;;
+
+			-s)
+				signal=$2
+				shift
+			;;
+		esac
+
+		shift
+	done
+
 	my_tree=( $(get_my_tree) self thread-self )
 	all_procs=( $(get_all_procs) )
 	procs_to_kill=( $(get_procs_to_kill) )
 
-	signal="${1:-"-15"}"
+	kill -n "$signal" "${procs_to_kill[@]}" 2>/dev/null
 
-	kill "$signal" "${procs_to_kill[@]}" 2>/dev/null
+	if (( flag_wait )); then
+		pid_wait "${procs_to_kill[@]}"
+	fi
 
 	return 0
 }