summaryrefslogtreecommitdiff
path: root/source/a/udev/config/rc.d/rc.udev.new
blob: 2bbd9819ca1ee9ebadce712e0baa6b493306b419 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
#!/bin/sh
# This is a script to initialize udev, which populates the /dev
# directory with device nodes, scans for devices, loads the
# appropriate kernel modules, and configures the devices.

PATH="/sbin:/bin"

. /etc/udev/udev.conf

# remove trailing slash from udev_root
UDEV_ROOT=$(echo "${udev_root}" |sed 's/\/*$//')

check_mounted() {
  grep -E -q "^[^[:space:]]+ $1 $2" /proc/mounts
  return $?	
}

mount_devpts() {
  if ! check_mounted $UDEV_ROOT/pts devpts ; then
    mkdir $UDEV_ROOT/pts 2> /dev/null
    mount -n -o mode=0620,gid=5 -t devpts devpts $UDEV_ROOT/pts
  fi
}

case "$1" in
    start)
        # Sanity check #1, udev requires that the kernel support devtmpfs:
        if ! grep -wq devtmpfs /proc/filesystems ; then
          echo "Sorry, but you need devtmpfs support in the kernel to use udev."
          echo "Both of these options are needed:  CONFIG_DEVTMPFS=y CONFIG_DEVTMPFS_MOUNT=y"
          echo
          echo "FATAL:  Refusing to run /etc/rc.d/rc.udev."
          sleep 10
          exit 1
        fi

	# Sanity check #2, udev requires that the kernel support tmpfs:
        if ! grep -wq tmpfs /proc/filesystems ; then
          echo "Sorry, but you need tmpfs support in the kernel to use udev."
          echo
          echo "FATAL:  Refusing to run /etc/rc.d/rc.udev."
          sleep 10
          exit 1
        fi

        # Sanity check #3, make sure that a 2.6.x kernel is new enough:
        if [ "$(uname -r | cut -f 1,2 -d .)" = "2.6" ]; then
          if [ "$(uname -r | cut -f 3 -d . | sed 's/[^[:digit:]].*//')" -lt "32" ]; then
            echo "Sorry, but you need a 2.6.32+ kernel to use this udev."
            echo "Your kernel version is only $(uname -r)."
            echo
            echo "FATAL:  Refusing to run /etc/rc.d/rc.udev."
            sleep 10
            exit 1
          fi
        fi

        # Sanity check #4, make sure the udev package was not removed.  If udevd
        # is not there, this will also shut off this script to prevent further
        # problems:
        if [ ! -x /sbin/udevd ]; then
          chmod 0644 /etc/rc.d/rc.udev
          echo "No udevd daemon found."
          echo "Turning off udev:  chmod 644 /etc/rc.d/rc.udev"
          echo "FATAL:  Refusing to run /etc/rc.d/rc.udev."
          sleep 10
          exit 1
        fi

        # Disable hotplug helper since udevd listens to netlink:
        if [ -e /proc/sys/kernel/hotplug ]; then
          echo "" > /proc/sys/kernel/hotplug
        fi

	if grep -qw devtmpfs /proc/filesystems ; then
	   if ! check_mounted $UDEV_ROOT devtmpfs ; then
		# umount shm if needed
		check_mounted $UDEV_ROOT/shm tmpfs && umount -l $UDEV_ROOT/shm

		# Umount pts if needed, we will remount it later:
		check_mounted $UDEV_ROOT/pts devpts && umount -l $UDEV_ROOT/pts
		
		# Mount tmpfs on $UDEV_ROOT:
		mount -n -t devtmpfs devtmpfs $UDEV_ROOT 
	   fi
	else 
		# Mount tmpfs on $UDEV_ROOT:
		if ! check_mounted $UDEV_ROOT tmpfs ; then
		  # umount shm if needed
		  check_mounted $UDEV_ROOT/shm tmpfs && umount -l $UDEV_ROOT/shm

		  # Umount pts if needed, we will remount it later:
		  check_mounted $UDEV_ROOT/pts devpts && umount -l $UDEV_ROOT/pts
		
		  # Mount tmpfs on $UDEV_ROOT:
		  # the -n is because we don't want $UDEV_ROOT umounted when
		  # someone (rc.[06]) calls umount -a
		  mount -n -o mode=0755 -t tmpfs tmpfs $UDEV_ROOT 
		
		fi
	fi
	# Mount devpts
	mount_devpts

        if ! /sbin/pidof udevd 1>/dev/null 2>/dev/null; then # start udevd
          echo "Starting udevd:  /sbin/udevd --daemon"
          /sbin/udevd --daemon
          # Since udev is just now being started we want to use add events:
          echo "Triggering udev events:  /sbin/udevadm trigger --action=add"
          # Call udevtrigger and udevsettle to do the device configuration:
          /sbin/udevadm trigger --type=subsystems --action=add
          /sbin/udevadm trigger --type=devices --action=add
        else # trigger changes for already running udevd
          # If the persistent rules files do not exist, trigger an add event:
          if [ ! -r /etc/udev/rules.d/70-persistent-net.rules ]; then
            # Test that we can actually write to the directory first:
            if touch /etc/udev/rules.d/testfile 2> /dev/null ; then
              rm -f /etc/udev/rules.d/testfile
              # This should add persistent net/cd rules:
              echo "Triggering udev to write persistent rules to /etc/udev/rules.d/"
              /sbin/udevadm trigger --type=devices --action=add
              sleep 3
            fi
          fi
          # Since udevd is running, most of the time we only need change events:
          echo "Triggering udev events:  /sbin/udevadm trigger --action=change"
          /sbin/udevadm trigger --type=subsystems --action=change
          /sbin/udevadm trigger --type=devices --action=change
        fi
        /sbin/udevadm settle --timeout=120
        ;;
    stop)
	echo "Stopping udevd is STRONGLY discouraged and not supported."
	echo "If you are sure you want to do this, use 'force-stop' instead."
	;;
    force-stop)
	echo "Stopping udevd"
	udevadm control --exit
	killall udevd 2>/dev/null
	;;
    restart)
	echo "Restarting udevd is STRONGLY discouraged and not supported."
	echo "If you are sure you want to do this, use 'force-restart' instead."
	;;
    force-restart)
	echo "Restarting udevd"
	udevadm control --exit
	sleep 3
	udevd --daemon
	;;
    reload)
	echo "Reloading udev rules"
	udevadm control --reload
	cp --preserve=all --recursive --update /lib/udev/devices/* $UDEV_ROOT
	;;
    force-reload)
	echo "Updating all available device nodes in $UDEV_ROOT"
	udevadm control --reload
	rm -rf $UDEV_ROOT/.udev $UDEV_ROOT/disk
	cp --preserve=all --recursive --update /lib/udev/devices/* $UDEV_ROOT
	;;
	
    *)
	echo "Usage: $0 {start|stop|restart|reload|force-reload}"
	exit 1
	;;
esac