Contents of /tags/busybox-init-0_1_1/busybox-initscripts/rc/udev
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Mon Jun 2 22:43:30 2008 UTC (16 years, 3 months ago) by (unknown author)
File size: 3870 byte(s)
Mon Jun 2 22:43:30 2008 UTC (16 years, 3 months ago) by (unknown author)
File size: 3870 byte(s)
This commit was manufactured by cvs2svn to create tag 'busybox-init-0_1_1'.
1 | #!/bin/sh |
2 | # $Header: /home/cvsd/magellan-cvs/magellan-src/busybox-initscripts/rc/udev,v 1.1 2008-06-02 22:14:35 niro Exp $ |
3 | |
4 | udev_version() |
5 | { |
6 | local version=0 |
7 | |
8 | if [[ -x /sbin/udev ]] |
9 | then |
10 | version=$(/sbin/udev -V) |
11 | # We need it without a leading '0', else bash do the wrong thing |
12 | version=${version##0} |
13 | # Older udev's will print nothing |
14 | [[ -z ${version} ]] && version=0 |
15 | elif [[ -x /sbin/udevd ]] |
16 | then |
17 | version=$(/sbin/udevd --version) |
18 | version=${version##0} |
19 | [[ -z ${version} ]] && version=0 |
20 | fi |
21 | |
22 | echo "${version}" |
23 | } |
24 | |
25 | populate_udev() |
26 | { |
27 | local opts |
28 | |
29 | # tell modprobe.sh to be verbose to $CONSOLE |
30 | echo CONSOLE=${CONSOLE} > /dev/.udev_populate |
31 | |
32 | # populate /dev with devices already found by the kernel |
33 | echo -e ${COLOREDSTAR}" Populating /dev with existing devices through uevents ..." |
34 | if [[ ${RC_COLDPLUG} = yes ]] |
35 | then |
36 | /sbin/udevtrigger |
37 | else |
38 | # do not run any init-scripts |
39 | /sbin/udevadm control --env do_not_run_plug_service=1 |
40 | |
41 | # only create device nodes |
42 | /sbin/udevtrigger --attr-match=dev |
43 | |
44 | # run persistent-net stuff |
45 | /sbin/udevtrigger --subsystem-match=net |
46 | fi |
47 | evaluate_retval |
48 | |
49 | # loop until everything is finished |
50 | echo -e ${COLOREDSTAR}" Letting udev process events ..." |
51 | /sbin/udevsettle --timeout=60 |
52 | evaluate_retval |
53 | |
54 | # unset this variable |
55 | udevadm control --env do_not_run_plug_service= |
56 | |
57 | rm -f /dev/.udev_populate |
58 | return 0 |
59 | } |
60 | |
61 | seed_dev() |
62 | { |
63 | # seed /dev with some things that we know we need |
64 | echo -e ${COLOREDSTAR}" Seeding /dev with needed nodes ..." |
65 | ( |
66 | [ ! -c /dev/console ] && mknod /dev/console c 5 1 |
67 | [ ! -c /dev/tty1 ] && mknod /dev/tty1 c 4 1 |
68 | [ ! -c /dev/null ] && mknod /dev/null c 1 3 |
69 | |
70 | # copy over any persistant things |
71 | if [[ -d /lib/udev/devices ]] |
72 | then |
73 | cp -RPp /lib/udev/devices/* /dev 2>/dev/null |
74 | fi |
75 | |
76 | # not provided by sysfs but needed |
77 | ln -snf /proc/self/fd /dev/fd |
78 | ln -snf fd/0 /dev/stdin |
79 | ln -snf fd/1 /dev/stdout |
80 | ln -snf fd/2 /dev/stderr |
81 | [[ -e /proc/kcore ]] && ln -snf /proc/kcore /dev/core |
82 | |
83 | # create problematic directories |
84 | mkdir -p /dev/pts /dev/shm |
85 | ) |
86 | evaluate_retval |
87 | } |
88 | |
89 | # main functions |
90 | start_udev() |
91 | { |
92 | # check if /dev/console exists outside tmpfs |
93 | [ -c /dev/console ] ; need_redirect=$? |
94 | |
95 | # create a ramdisk for populating udev |
96 | echo -e ${COLOREDSTAR}"Mounting udev at /dev ..." |
97 | # many video drivers needed exec access |
98 | fstype=ramfs |
99 | # tmpfs was suggested by Greg Kroah-Hartman |
100 | kernel_supports_fs tmpfs && fstype=tmpfs |
101 | mount -n -t ${fstype} udev /dev -o exec,nosuid,mode=0755,size=10M |
102 | evaluate_retval |
103 | |
104 | # if a device tarball exists load it and if it is activated |
105 | echo -e ${COLOREDSTAR}"Configurating system to use udev ..." |
106 | if [[ ${RC_DEVICE_TARBALL} = yes ]] |
107 | then |
108 | echo -e ${COLOREDSTAR}" Populating /dev with saved device nodes ..." |
109 | tar -jxpf /lib/udev/state/devices.tar.bz2 -C /dev |
110 | evaluate_retval |
111 | fi |
112 | |
113 | # other eeded device nodes with udev |
114 | seed_dev |
115 | |
116 | if [ -e /proc/sys/kernel/hotplug ] |
117 | then |
118 | echo -e ${COLOREDSTAR}" Using netlink for hotplug events ..." |
119 | echo "" > /proc/sys/kernel/hotplug |
120 | evaluate_retval |
121 | else |
122 | echo -e ${COLOREDSTAR}${COLYELLOW}" Kernel was not compiled with hotplug support !" |
123 | print_status failure |
124 | fi |
125 | |
126 | echo -e ${COLOREDSTAR}" Starting udevd daemon ..." |
127 | if [ ${need_redirect} -eq 1 ] |
128 | then |
129 | # we need to open fds 0 1 2 |
130 | /sbin/udevd --daemon </dev/console >/dev/console 2>/dev/console |
131 | else |
132 | /sbin/udevd --daemon |
133 | fi |
134 | evaluate_retval |
135 | |
136 | # write root_link rule |
137 | /lib/udev/write_root_link_rule |
138 | # populate udev device nodes |
139 | populate_udev |
140 | |
141 | # create nodes that udev can't |
142 | echo -e ${COLOREDSTAR}" Finializing udev configuration ..." |
143 | [[ -x /sbin/dmsetup ]] && /sbin/dmsetup mknodes &>/dev/null |
144 | [[ -x /sbin/lvm ]] && /sbin/lvm vgscan -P --mknodes --ignorelockingfailure &>/dev/null |
145 | [[ -x /sbin/evms_activate ]] && /sbin/evms_activate -q &>/dev/null |
146 | print_status success |
147 | |
148 | # same thing as /dev/.devfsd |
149 | touch /dev/.udev |
150 | } |