mod-udev.sh

   1 #!/bin/sh
   2 UDEV_RCSID='$Revision$ $Date::                            $'
   3
   4 # geninitrd mod: udev
   5 USE_UDEV=${USE_UDEV:-yes}
   6
   7 #
   8 # TODO:
   9 # - make udev start before insmods
  10 # - make proper use of USE_UDEV - don't copy rules if USE_UDEV is off no!
  11
  12 inst_rules() {
  13         local _rule _found d
  14
  15         inst_d "/lib/udev/rules.d"
  16         for _rule in "$@"; do
  17                 for d in /lib/udev/rules.d /etc/udev/rules.d /lib/geninitrd/udev-rules; do
  18                         if [ -f $d/$_rule ]; then
  19                                 inst $d/$_rule /lib/udev/rules.d/$_rule
  20                         fi
  21                 done
  22         done
  23
  24 }
  25
  26 # setup geninitrd module
  27 # @access       public
  28 setup_mod_udev() {
  29         udevd=$(find_tool $initrd_dir/udevd /sbin/initrd-udevd)
  30         udevadm=$(find_tool $initrd_dir/udevadm /sbin/initrd-udevadm)
  31
  32         if [ "$kernel_version" -lt "002006" ] || [ ! -x "$udevd" -o ! -x "$udevadm" -o ! -f /etc/udev/udev.conf ]; then
  33                 USE_UDEV=no
  34         fi
  35
  36         if is_yes "$USE_UDEV"; then
  37                 . /etc/udev/udev.conf
  38         fi
  39 }
  40
  41 # generate initrd fragment
  42 # @access       public
  43 initrd_gen_udev() {
  44         verbose "Setting up udev..."
  45
  46         inst_d /sbin /etc/udev
  47         inst_exec $udevd /sbin/udevd
  48         inst_exec $udevadm /sbin/udevadm
  49         inst /etc/udev/udev.conf /etc/udev/udev.conf
  50         # standard udev rules
  51         inst_rules 50-udev-default.rules 60-persistent-storage.rules 61-persistent-storage-edd.rules 80-drivers.rules 95-udev-late.rules \
  52                 60-pcmcia.rules 50-firmware.rules 10-dm.rules 11-dm-lvm.rules 13-dm-disk.rules
  53         # initrd dedicated rules
  54         inst_rules 01-ignore.rules 59-persistent-storage.rules 61-persistent-storage.rules 11-dm.rules
  55
  56         local e
  57         for e in ata_id cdrom_id collect firmware scsi_id v4l_id; do
  58                 if [ -e "$initrd_dir/udev/$e" ]; then
  59                         inst_exec $initrd_dir/udev/$e /lib/udev/$e
  60                 fi
  61         done
  62
  63         # blkid installed by mod-blkid
  64         if ! is_yes "$USE_BLKID"; then
  65                 warn "BLKID support missing"
  66         fi
  67
  68         local dir dmsetup
  69         for dir in $initrd_dir /sbin; do
  70                 if [ -x "$dir/dmsetup" ] &&
  71                         [ "$($dir/dmsetup udevcookies 2>&1 | grep -c 'Command not supported')" -eq 0 ]; then
  72                         dmsetup=$dir/dmsetup
  73                         break
  74                 fi
  75         done
  76         if [ -z "$dmsetup" ]; then
  77                 warn "Can't find dmsetup with udev support"
  78         else
  79                 inst_exec $dmsetup /sbin/dmsetup
  80         fi
  81
  82         mount_dev
  83         mount_sys
  84         mount_run
  85         add_linuxrc <<-'EOF'
  86                 : 'Starting udev'
  87                 mkdir /run/udev
  88                 /sbin/udevd --daemon
  89                 /sbin/udevadm trigger --type=subsystems --action=add
  90                 /sbin/udevadm trigger --type=devices --action=add
  91                 /sbin/udevadm settle
  92         EOF
  93 }
  94
  95 initrd_gen_stop_udevd() {
  96         if ! is_yes "$USE_UDEV"; then
  97                 return
  98         fi
  99         add_linuxrc     <<-'EOF'
 100                 /sbin/udevadm control --exit
 101                 /sbin/udevadm info --cleanup-db
 102         EOF
 103 }
 104
 105 # generate initrd fragment
 106 # @access       public
 107 initrd_gen_mdev() {
 108         debug "Setting up mdev..."
 109
 110         busybox_applet mdev
 111         ln -s busybox $DESTDIR/bin/mdev
 112
 113         cat > $DESTDIR/etc/mdev.conf    <<-'EOF'
 114 # Provide user, group, and mode information for devices.  If a regex matches
 115 # the device name provided by sysfs, use the appropriate user:group and mode
 116 # instead of the default 0:0 660.
 117 #
 118 # Syntax:
 119 # %s %d:%d %s
 120 # devicename_regex user:group mode
 121
 122 null            0:0 666
 123 zero            0:0 666
 124 random          0:0 666
 125 urandom         0:0 666
 126
 127 kmsg            0:0 644
 128 kmem            0:9 000
 129 mem             0:9 640
 130 port            0:9 640
 131
 132 snapshot        0:0 600
 133
 134 console         0:5 600
 135 ptmx            0:5 666
 136 tty[0-9]*       0:5 600
 137
 138 ttyS[0-9]*      0:16 660
 139
 140 fd[0-9]*        0:19 660
 141
 142 sd[a-z]*        0:6 660
 143 hd[a-z]*        0:6 660
 144         EOF
 145
 146         mount_dev
 147         mount_sys
 148         mount_run
 149         add_linuxrc     <<-'EOF'
 150                 echo /bin/mdev > /proc/sys/kernel/hotplug
 151                 mdev -s
 152         EOF
 153 }
 154
 155 initrd_gen_stop_mdev() {
 156         add_linuxrc     <<-'EOF'
 157                 killall mdev > /dev/null 2>&1
 158         EOF
 159 }