Changes for page Openwrt Notes

Last modified by Leon Poon on 2019/11/02 17:53
From version 3.1
edited by Leon Poon
on 2019/01/05 14:49
Change comment: There is no comment for this version
To version 4.1
edited by Leon Poon
on 2019/01/05 15:28
Change comment: There is no comment for this version

Summary

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... ... @@ -8,7 +8,7 @@
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 14  * kmodloader in subprocess (waits until done)
... ... @@ -17,4 +17,28 @@
17 17  ** /etc/preinit in subprocess
18 18  * when /etc/preinit is done then it execvp the "real" /sbin/procd
19 19  
20 +
21 +
22 +procd states:
23 +
24 +* early (first state):
25 +** coldplug (remount /dev, etc)
26 +*** start udevtrigger in subproc
27 +*** when udevtrigger completes, hotplug
28 +*** when hotplug completes, next state (ubus)
29 +* ubus:
30 +** start attempts to connect to ubs
31 +** start ubus as service
32 +** once connection's done then next state (init)
33 +* init - read /etc/inittab and run:
34 +** respawn - things that need to keep rerunning once quitted
35 +** askconsole
36 +** askfirst - the "Press Enter to activate this console" message
37 +** sysinit - (usually /etc/init.d/rcS with S) and then next state (running)
38 +* running - waits for shutdown signal (usr1/usr2) or reboot (int/term)
39 +* shutdown
40 +** runs shutdown command per inittab (also /etc/init.d/rcS but with K)
41 +** when done next state (halt)
42 +* halt - kill everything and either enter sleep loop or reboots
43 +
20 20