| 1 | #!/bin/sh
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| 2 | ########################################################################
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| 3 | # Begin udev
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| 4 | #
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| 5 | # Description : Udev cold-plugging script
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| 6 | #
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| 7 | # Authors : Zack Winkles, Alexander E. Patrakov
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| 8 | # Update : Bruce Dubbs - bdubbs@linuxfromscratch.org
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| 9 | #
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| 10 | # Version : LFS 7.0
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| 11 | #
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| 12 | ########################################################################
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| 13 |
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| 14 | ### BEGIN INIT INFO
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| 15 | # Provides: udev
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| 16 | # Required-Start:
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| 17 | # Should-Start: modules
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| 18 | # Required-Stop:
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| 19 | # Should-Stop:
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| 20 | # Default-Start: S
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| 21 | # Default-Stop:
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| 22 | # Short-Description: Populates /dev with device nodes.
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| 23 | # Description: Mounts a tempfs on /dev and starts the udevd daemon.
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| 24 | # Device nodes are created as defined by udev.
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| 25 | # X-LFS-Provided-By: LFS
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| 26 | ### END INIT INFO
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| 27 |
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| 28 | . /lib/boot/functions
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| 29 |
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| 30 | case "${1}" in
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| 31 | start)
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| 32 | boot_mesg "Populating /dev with device nodes..."
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| 33 | if ! grep -q '[[:space:]]sysfs' /proc/mounts; then
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| 34 | echo_failure
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| 35 | boot_mesg -n "FAILURE:\n\nUnable to create" ${FAILURE}
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| 36 | boot_mesg -n " devices without a SysFS filesystem"
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| 37 | boot_mesg -n "\n\nAfter you press Enter, this system"
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| 38 | boot_mesg -n " will be halted and powered off."
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| 39 | boot_mesg -n "\n\nPress Enter to continue..." ${INFO}
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| 40 | boot_mesg "" ${NORMAL}
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| 41 | wait_for_user
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| 42 | /etc/rc.d/init.d/halt stop
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| 43 | fi
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| 44 |
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| 45 | # Mount a temporary file system over /dev, so that any devices
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| 46 | # made or removed during this boot don't affect the next one.
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| 47 | # The reason we don't write to mtab is because we don't ever
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| 48 | # want /dev to be unavailable (such as by `umount -a').
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| 49 | if ! mountpoint /dev > /dev/null; then
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| 50 | mount -n -t tmpfs tmpfs /dev -o mode=755
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| 51 | fi
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| 52 | if [ ${?} != 0 ]; then
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| 53 | echo_failure
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| 54 | boot_mesg -n "FAILURE:\n\nCannot mount a tmpfs" ${FAILURE}
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| 55 | boot_mesg -n " onto /dev, this system will be halted."
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| 56 | boot_mesg -n "\n\nAfter you press Enter, this system"
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| 57 | boot_mesg -n " will be halted and powered off."
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| 58 | boot_mesg -n "\n\nPress Enter to continue..." ${INFO}
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| 59 | boot_mesg "" ${NORMAL}
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| 60 | wait_for_user
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| 61 | /etc/rc.d/init.d/halt stop
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| 62 | fi
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| 63 |
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| 64 | ln -s /run/shm /dev/shm
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| 65 |
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| 66 | # Udev handles uevents itself, so we don't need to have
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| 67 | # the kernel call out to any binary in response to them
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| 68 | echo > /proc/sys/kernel/hotplug
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| 69 |
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| 70 | # Copy the only static device node that Udev >= 155 doesn't
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| 71 | # handle to /dev
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| 72 | cp -a /lib/udev/devices/null /dev
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| 73 |
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| 74 | # Start the udev daemon to continually watch for, and act on,
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| 75 | # uevents
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| 76 | /sbin/udevd --daemon
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| 77 |
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| 78 | # Now traverse /sys in order to "coldplug" devices that have
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| 79 | # already been discovered
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| 80 | /sbin/udevadm trigger --action=add --type=subsystems
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| 81 | /sbin/udevadm trigger --action=add --type=devices
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| 82 |
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| 83 | # Now wait for udevd to process the uevents we triggered
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| 84 | /sbin/udevadm settle
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| 85 | evaluate_retval
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| 86 | ;;
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| 87 |
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| 88 | *)
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| 89 | echo "Usage ${0} {start}"
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| 90 | exit 1
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| 91 | ;;
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| 92 | esac
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| 93 |
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| 94 | # End udev
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