Logging

modules/data.lua

@@ -1,6 +1,7 @@
 local utils = require "../utils"
 local t = require "../utils/templater"
 local dirs = {}
+local links = {}
 
 local function generate_mount_data()
 	local string = "#!/bin/sh\n"
@@ -26,6 +27,16 @@ mount '{{path}}' '{{mountpoint}}' -o bind,umask=100,uid={{uid}},gid={{gid}} || e
 			)
 		end
 	end
+	for i=1,#links do
+		local link = links[i]
+		string = string .. t([[
+mkdir -p '{{dirname}}' || exit 1
+ln -s '{{target}}' '{{path}}' || exit 1
+]],
+			{ dirname = utils.dirname(link.path),
+			target = link.target, path = link.path }
+		)
+	end
 	add_file("/usr/local/bin/mount-data", string)
 	chmod("/usr/local/bin/mount-data", 700)
 end
@@ -43,10 +54,15 @@ local function add_data_file(path, mountpoint, uid, gid)
 	})
 	generate_mount_data()
 end
+local function add_data_link(target, path)
+	table.insert(links, { target = target, path = path })
+	generate_mount_data()
+end
 
 modules.data = {
 	add_data_dir = add_data_dir,
 	add_data_file = add_data_file,
+	add_data_link = add_data_link,
 }
 
 mkdir("/data")

modules/runit.lua

@@ -8,9 +8,23 @@ local function add_executable(path, script)
     add_file(path, script)
     chmod(path, "700")
 end
-local function add_service(name, script)
+local function add_service(name, script, _log)
+    local log = _log == nil and true or _log
     local params = {name = name}
     local run_script_path = t("/etc/sv/{{name}}/run", params)
+    if log then
+        local log_script_path = t("/etc/sv/{{name}}/log/run", params)
+        if log == true then
+            add_executable(log_script_path, t([[#!/bin/sh
+exec logger -p daemon.info -t {{name}}]], params))
+        else
+            add_executable(log_script_path, log)
+        end
+        add_symlink(
+            t("/etc/sv/{{name}}/log/supervise", params),
+            t("/run/runit/supervise.{{name}}.log", params)
+        )
+    end
     add_executable(run_script_path, script)
     add_symlink("/etc/runit/runsvdir/default/"..name, "/etc/sv/"..name)
     add_symlink(
@@ -357,6 +371,7 @@ fi
 
 add_packages({ "runit", "eudev" })
 modules.runit.add_service("getty-tty1", [[#!/bin/sh
-exec chpst -P getty 38400 tty1 linux]])
+exec chpst -P getty 38400 tty1 linux]], false)
 modules.runit.add_service("getty-tty2", [[#!/bin/sh
-exec chpst -P getty 38400 tty2 linux]])
+exec chpst -P getty 38400 tty2 linux]], false)
+

modules/socklog.lua

@@ -0,0 +1,68 @@
+add_packages({ "socklog" })
+-- Thanks to https://github.com/void-linux/socklog-void
+
+modules.runit.add_service("socklog-unix",
+[[#!/bin/sh
+exec chpst -U nobody:nogroup socklog unix /dev/log 2>&1]],
+[[#!/bin/sh
+exec svlogd -ttt /var/log/socklog/*]])
+modules.data.add_data_dir("/data/socklog/", "/var/log/socklog", "root", "root")
+add_file("/etc/socklog/everything", [[!syslog-stripdate
+-auth.*
+-authpriv.*]])
+modules.data.add_data_link("/etc/socklog/everything", "/var/log/socklog/everything/config")
+
+-- TODO: package
+add_file("/usr/local/bin/svlogtail", [[#!/bin/sh
+
+usage () {
+	cat <<-'EOF'
+	svlogtail [-f] [LOG...] - show svlogd logs conveniently
+	Without arguments, show current logs of all services, uniquely.
+	With arguments, show all logs of mentioned services
+	
+	With -f, follow log output.
+	EOF
+}
+
+globexist() {
+	[ -f "$1" ]
+}
+
+IFS='
+'
+
+fflag=false
+if [ "$1" = -f ]; then
+	shift
+	fflag=true
+fi
+
+if [ $# = 0 ]; then
+	cat /var/log/socklog/*/current | sort -u
+	if $fflag; then
+		tail -Fq -n0 /var/log/socklog/*/current | uniq
+	fi
+else
+	old=
+	cur=
+	for log; do
+		case "$log" in
+			-*) usage; exit 1;;
+		esac
+		if [ -d /var/log/socklog/$log ]; then
+			if globexist /var/log/socklog/$log/*.[us]; then
+				old="$old$IFS/var/log/socklog/$log/*.[us]"
+			fi
+			cur="$cur$IFS/var/log/socklog/$log/current"
+		else
+			echo "no logs for $log" 1>&2
+                        exit 1
+		fi
+	done
+	cat $old $cur | sort
+	if $fflag; then
+		tail -Fq -n0 $cur
+	fi
+fi]])
+chmod("/usr/local/bin/svlogtail", "700")

setup.lua

@@ -44,6 +44,7 @@ module "fstab"
 module "data"
 module "kernel"
 module "runit"
+module "socklog"
 module "hostname"
 module "dhcpcd"
 module "nginx"