Changes for page Openwrt Notes

Last modified by Leon Poon on 2019/11/02 17:53
From version 16.1
edited by Leon Poon
on 2019/01/06 13:16
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

Page properties
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)
... ... @@ -17,69 +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 -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 -= Debian =
43 -
44 -Things to do after debootstrap:
45 -
46 -* [[get rid of systemd>>http://without-systemd.org/wiki/index.php/How_to_remove_systemd_from_a_Debian_Stretch_installation]]
47 -* set hostname
48 -* set root password
49 -* /etc/network/interfaces (TODO: swconfig while still in openwrt initramfs space?)
50 -* apt-get install net-tools file ntp openssh-server gcc
51 -** net-tools for ifconfig
52 -** gcc for?
53 -* read-only root
54 -
55 -Needs CONFIG_DEVTMPFS=y in kernel.
56 -
57 -{{code language="bash"}}
58 -mkdir -pv /mnt && mknod /dev/sda b 8 0 && cryptsetup open /dev/sda usb && vgchange -ay vol_grp1 && mount /dev/vol_grp1/logical_vol1 /mnt
59 -{{/code}}
60 -
61 -{{code language="bash"}}
62 -chroot /mnt /bin/bash
63 -{{/code}}
64 -
65 -{{code language="bash"}}
66 -mount proc /proc -t proc
67 -{{/code}}
68 -
69 -{{code language="bash"}}
70 -exec switch_root /mnt /sbin/init
71 -{{/code}}
72 -
73 -{{code language="bash"}}
74 -ip addr add dev eth0 IP/NM
75 -ip link set eth0 up
76 -ip route add default via GW
77 -{{/code}}
78 -
79 -= Network =
80 -
81 -{{code language="bash"}}
82 -sed -re 's/^boot_run_hook/#\0/g' -i /etc/preinit
83 -PREINIT=1 . /etc/preinit
84 -preinit_ip
85 -{{/code}}
20 +