add logging and other things

etc/init.rc

@@ -4,6 +4,7 @@
 #   service NAME /path/to/exe [args...]
 #       user = ... | group = ... | class = ... | respawn = ... | crash-threshold = ...
 #       crash-window = ... | setenv = ... | cwd = ... | seclabel = ...
+#       logfile = ... | depends = ...
 #       oneshot | disabled | console        (flag options, no value)
 #
 #   on TRIGGER
@@ -16,10 +17,12 @@
 #       write  PATH CONTENT
 #       symlink TARGET LINK
 #       mount SOURCE TARGET FSTYPE
+#       setprop KEY VALUE | getprop KEY
 #       log    message...
 #
 # standard trigger sequence run at boot: early-init, init, boot.
-# future: property:<key>=<value>, service-started:<name>.
+# property:<key>=<value> actions fire when `setprop KEY VALUE` runs;
+# service-started:<name> is on the roadmap.
 
 on early-init
     mount proc /proc proc
@@ -33,8 +36,12 @@ on early-init
 on init
     exec /sbin/modprobe virtio_rng
     write /proc/sys/kernel/hostname bajia
+    setprop config.ready 1
     log **** bajia init on-line ****
 
+on property:config.ready=1
+    log configuration is ready
+
 on boot
     start console
     start watchdog
@@ -46,9 +53,11 @@ service console /sbin/getty -L ttyS0 115200 vt100
     user = root
 
 # a long-lived example daemon. respawning is the default (always).
+# logfile captures its stdout+stderr (parent dir /run exists via early-init).
 service watchdog /usr/sbin/watchdog
     class = core
     respawn = always
+    logfile = /run/watchdog.log
 
 # a one-shot job: runs once, exits, never respawns.
 service boot-logo /usr/bin/show-boot-logo

etc/initramfs.rc

@@ -0,0 +1,19 @@
+# bajia initramfs.rc - first-stage init config for a classic two-stage boot.
+#
+# adjust the root device path below to match your hardware/rootfs setup.
+
+on early-init
+    mount proc /proc proc
+    mount sysfs /sys sysfs
+    mount devtmpfs /dev devtmpfs
+
+on init
+    # mount the real root filesystem (reuse `mount SOURCE TARGET FSTYPE`).
+    # typical alternatives: `mount /dev/mmcblk0p2 /mnt/root ext4`,
+    # an NFS root, or cryptsetup/LVM set up by earlier `exec` commands.
+    mkdir /mnt/root 0755
+    mount /dev/sda1 /mnt/root ext4
+
+# the last trigger: pivot onto the real root and exec the real init.
+on boot
+    switch_root /mnt/root /sbin/init /etc/bajia/init.rc