Changes for page Openwrt Notes

Last modified by Leon Poon on 2019/11/02 17:53
From version 5.1
edited by Leon Poon
on 2019/01/06 08:42
Change comment: There is no comment for this version
To version 3.1
edited by Leon Poon
on 2019/01/05 14:49
Change comment: There is no comment for this version

Summary

Details

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Title
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1 -Openwrt Notes
1 +Openwrt Boot Notes
Content
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8 8  
9 9  /sbin/init is ELF comes from procd package. What it does (as pid=1):
10 10  
11 -* early (different from procd early):
11 +* 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)
... ... @@ -17,34 +17,4 @@
17 17  ** /etc/preinit in subprocess
18 18  * when /etc/preinit is done then it execvp the "real" /sbin/procd
19 19  
20 -
21 -procd states:
22 -
23 -* early (first state):
24 -** coldplug (remount /dev, etc)
25 -*** start udevtrigger in subproc
26 -*** when udevtrigger completes, hotplug
27 -*** when hotplug completes, next state (ubus)
28 -* ubus:
29 -** start attempts to connect to ubs
30 -** start ubus as service
31 -** once connection's done then next state (init)
32 -* init - read /etc/inittab and run:
33 -** respawn - things that need to keep rerunning once quitted
34 -** askconsole
35 -** askfirst - the "Press Enter to activate this console" message
36 -** sysinit - (usually /etc/init.d/rcS with S) and then next state (running)
37 -* running - waits for shutdown signal (usr1/usr2) or reboot (int/term)
38 -* shutdown
39 -** runs shutdown command per inittab (also /etc/init.d/rcS but with K)
40 -** when done next state (halt)
41 -* halt - kill everything and either enter sleep loop or reboots
42 -
43 -
44 -
45 -
46 -= Debian =
47 -
48 -Needs devtmpfs in kernel (this seem to be first thing that /sbin/init does.
49 -
50 50