Changes for page Openwrt Notes

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Title

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1		-Openwrt Boot Notes
	1	+Openwrt Notes

Content

...	...	@@ -8,13 +8,49 @@
8	8
9	9	/sbin/init is ELF comes from procd package. What it does (as pid=1):
10	10
11		-* early:
	11	+* early (different from procd early):
12	12	** mount /proc, /sysfs, and create /dev nodes, create /tmp subdirs etc
13	13	** set PATH
14		-* kmodloader in subprocess
	14	+* kmodloader in subprocess (waits until done)
15	15	* preinit
16	16	** plugd in subprocess (seem to deal with firmware)
17	17	** /etc/preinit in subprocess
18	18	* when /etc/preinit is done then it execvp the "real" /sbin/procd
19	19
	20	+procd states:
	21	+
	22	+* early (first state):
	23	+** coldplug (remount /dev, etc)
	24	+*** start udevtrigger in subproc
	25	+*** when udevtrigger completes, hotplug
	26	+*** when hotplug completes, next state (ubus)
	27	+* ubus:
	28	+** start attempts to connect to ubs
	29	+** start ubus as service
	30	+** once connection's done then next state (init)
	31	+* init - read /etc/inittab and run:
	32	+** respawn - things that need to keep rerunning once quitted
	33	+** askconsole
	34	+** askfirst - the "Press Enter to activate this console" message
	35	+** sysinit - (usually /etc/init.d/rcS with S) and then next state (running)
	36	+* running - waits for shutdown signal (usr1/usr2) or reboot (int/term)
	37	+* shutdown
	38	+** runs shutdown command per inittab (also /etc/init.d/rcS but with K)
	39	+** when done next state (halt)
	40	+* halt - kill everything and either enter sleep loop or reboots
	41	+
	42	+
	43	+= Debian =
	44	+
	45	+Needs devtmpfs in kernel. This seem to be first thing that /sbin/init does. (Maybe systemd specific.)
	46	+
	47	+{{code}}
	48	+mkdir -pv /mnt/debian && mknod /dev/sda b 8 0 && cryptsetup open /dev/sda usb && vgchange -ay vol_grp1 && mount /dev/vol_grp1/logical_vol1 /mnt/debian
	49	+exec switch_root /mnt/debian /sbin/init
	50	+{{/code}}
	51	+
	52	+{{code}}
	53	+ip addr add dev eth0 $IP/$NM
	54	+ip route add default via $GW
	55	+{{/code}}
20	20