mod-udev.sh

   1 #!/bin/sh
   2 # geninitrd mod: udev
   3 USE_UDEV=${USE_UDEV:-yes}
   4
   5 #
   6 # TODO:
   7 # - make udev start before insmods
   8 # - make proper use of USE_UDEV - don't copy rules if USE_UDEV is off no!
   9
  10 inst_rules() {
  11         local _rule _found d
  12
  13         inst_d "/lib/udev/rules.d"
  14         for _rule in "$@"; do
  15                 for d in /lib/udev/rules.d /etc/udev/rules.d /lib/geninitrd/udev-rules; do
  16                         if [ -f $d/$_rule ]; then
  17                                 inst $d/$_rule /lib/udev/rules.d/$_rule
  18                         fi
  19                 done
  20         done
  21
  22 }
  23
  24 # setup geninitrd module
  25 # @access       public
  26 setup_mod_udev() {
  27         udevd=$(find_tool $initrd_dir/udevd /sbin/initrd-udevd)
  28         udevadm=$(find_tool $initrd_dir/udevadm /sbin/initrd-udevadm)
  29
  30         if [ "$kernel_version" -lt "002006" ] || [ ! -x "$udevd" -o ! -x "$udevadm" -o ! -f /etc/udev/udev.conf ]; then
  31                 USE_UDEV=no
  32         fi
  33
  34         if is_yes "$USE_UDEV"; then
  35                 . /etc/udev/udev.conf
  36         fi
  37 }
  38
  39 # generate initrd fragment
  40 # @access       public
  41 initrd_gen_udev() {
  42         verbose "Setting up udev..."
  43
  44         inst_d /sbin /etc/udev
  45         inst_exec $udevd /sbin/udevd
  46         inst_exec $udevadm /sbin/udevadm
  47         inst /etc/udev/udev.conf /etc/udev/udev.conf
  48         # standard udev rules
  49         inst_rules 50-udev-default.rules 60-persistent-storage.rules 61-persistent-storage-edd.rules 80-drivers.rules 95-udev-late.rules \
  50                 60-pcmcia.rules 50-firmware.rules 10-dm.rules 11-dm-lvm.rules 13-dm-disk.rules 95-dm-notify.rules
  51         # initrd dedicated rules
  52         inst_rules 01-ignore.rules 59-persistent-storage.rules 61-persistent-storage.rules 11-dm.rules
  53
  54         local e
  55         for e in ata_id cdrom_id collect firmware scsi_id v4l_id; do
  56                 if [ -e "$initrd_dir/udev/$e" ]; then
  57                         inst_exec $initrd_dir/udev/$e /lib/udev/$e
  58                 fi
  59         done
  60
  61         # blkid installed by mod-blkid
  62         if ! is_yes "$USE_BLKID"; then
  63                 warn "BLKID support missing"
  64         fi
  65
  66         local dir dmsetup
  67         for dir in $initrd_dir /sbin; do
  68                 if [ -x "$dir/dmsetup" ] &&
  69                         [ "$($dir/dmsetup udevcookies 2>&1 | grep -c 'Command not supported')" -eq 0 ]; then
  70                         dmsetup=$dir/dmsetup
  71                         break
  72                 fi
  73         done
  74         if [ -z "$dmsetup" ]; then
  75                 warn "Can't find dmsetup with udev support"
  76         else
  77                 inst_exec $dmsetup /sbin/dmsetup
  78         fi
  79
  80         mount_dev
  81         mount_sys
  82         mount_run
  83         add_linuxrc <<-'EOF'
  84                 : 'Starting udev'
  85                 mkdir /run/udev
  86                 /sbin/udevd --daemon
  87                 /sbin/udevadm trigger --type=subsystems --action=add
  88                 /sbin/udevadm trigger --type=devices --action=add
  89                 /sbin/udevadm settle
  90         EOF
  91 }
  92
  93 initrd_gen_stop_udevd() {
  94         if ! is_yes "$USE_UDEV"; then
  95                 return
  96         fi
  97         add_linuxrc     <<-'EOF'
  98                 /sbin/udevadm control --exit
  99                 /sbin/udevadm info --cleanup-db
 100         EOF
 101 }
 102
 103 # generate initrd fragment
 104 # @access       public
 105 initrd_gen_mdev() {
 106         debug "Setting up mdev..."
 107
 108         busybox_applet mdev
 109         ln -s busybox $DESTDIR/bin/mdev
 110
 111         cat > $DESTDIR/etc/mdev.conf    <<-'EOF'
 112 # Provide user, group, and mode information for devices.  If a regex matches
 113 # the device name provided by sysfs, use the appropriate user:group and mode
 114 # instead of the default 0:0 660.
 115 #
 116 # Syntax:
 117 # %s %d:%d %s
 118 # devicename_regex user:group mode
 119
 120 null            0:0 666
 121 zero            0:0 666
 122 random          0:0 666
 123 urandom         0:0 666
 124
 125 kmsg            0:0 644
 126 kmem            0:9 000
 127 mem             0:9 640
 128 port            0:9 640
 129
 130 snapshot        0:0 600
 131
 132 console         0:5 600
 133 ptmx            0:5 666
 134 tty[0-9]*       0:5 600
 135
 136 ttyS[0-9]*      0:16 660
 137
 138 fd[0-9]*        0:19 660
 139
 140 sd[a-z]*        0:6 660
 141 hd[a-z]*        0:6 660
 142         EOF
 143
 144         mount_dev
 145         mount_sys
 146         mount_run
 147         add_linuxrc     <<-'EOF'
 148                 :> /dev/mdev.seq
 149                 echo /bin/mdev > /proc/sys/kernel/hotplug
 150                 mdev -s
 151         EOF
 152 }
 153
 154 initrd_gen_stop_mdev() {
 155         add_linuxrc     <<-'EOF'
 156                 killall mdev > /dev/null 2>&1
 157         EOF
 158 }