| 1 | #!/bin/sh
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| 2 | ########################################################################
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| 3 | # Begin $rc_base/init.d/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 | #
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| 9 | # Version : 00.02
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| 10 | #
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| 11 | # Notes :
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| 12 | #
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| 13 | ########################################################################
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| 14 |
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| 15 | . /etc/sysconfig/rc
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| 16 | . ${rc_functions}
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| 17 |
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| 18 | case "${1}" in
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| 19 | start)
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| 20 | boot_mesg "Populating /dev with device nodes..."
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| 21 | if ! grep -q '[[:space:]]sysfs' /proc/mounts; then
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| 22 | echo_failure
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| 23 | boot_mesg -n "FAILURE:\n\nUnable to create" ${FAILURE}
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| 24 | boot_mesg -n " devices without a SysFS filesystem"
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| 25 | boot_mesg -n "\n\nAfter you press Enter, this system"
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| 26 | boot_mesg -n " will be halted and powered off."
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| 27 | boot_mesg -n "\n\nPress Enter to continue..." ${INFO}
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| 28 | boot_mesg "" ${NORMAL}
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| 29 | read ENTER
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| 30 | /etc/rc.d/init.d/halt stop
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| 31 | fi
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| 32 |
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| 33 | # Mount a temporary file system over /dev, so that any devices
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| 34 | # made or removed during this boot don't affect the next one.
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| 35 | # The reason we don't write to mtab is because we don't ever
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| 36 | # want /dev to be unavailable (such as by `umount -a').
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| 37 | mount -n -t tmpfs tmpfs /dev -o mode=755
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| 38 | if [ ${?} != 0 ]; then
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| 39 | echo_failure
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| 40 | boot_mesg -n "FAILURE:\n\nCannot mount a tmpfs" ${FAILURE}
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| 41 | boot_mesg -n " onto /dev, this system will be halted."
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| 42 | boot_mesg -n "\n\nAfter you press Enter, this system"
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| 43 | boot_mesg -n " will be halted and powered off."
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| 44 | boot_mesg -n "\n\nPress Enter to continue..." ${INFO}
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| 45 | boot_mesg "" ${NORMAL}
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| 46 | read ENTER
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| 47 | /etc/rc.d/init.d/halt stop
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| 48 | fi
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| 49 |
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| 50 | # Udev handles uevents itself, so we don't need to have
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| 51 | # the kernel call out to any binary in response to them
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| 52 | echo > /proc/sys/kernel/hotplug
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| 53 |
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| 54 | # Copy static device nodes to /dev
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| 55 | cp -a /lib/udev/devices/* /dev
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| 56 |
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| 57 | # Start the udev daemon to continually watch for, and act on,
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| 58 | # uevents
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| 59 | /sbin/udevd --daemon
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| 60 |
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| 61 | # Now traverse /sys in order to "coldplug" devices that have
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| 62 | # already been discovered
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| 63 | /sbin/udevtrigger
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| 64 |
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| 65 | # Now wait for udevd to process the uevents we triggered
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| 66 | /sbin/udevsettle
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| 67 | failed="${?}"
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| 68 | > /dev/bug
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| 69 | sleep 6
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| 70 | if test -s /dev/bug; then
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| 71 | mv /dev/bug /dev/bugreport
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| 72 | failed="2"
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| 73 | else
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| 74 | rm -f /dev/bug
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| 75 | fi
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| 76 | (exit "${failed}")
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| 77 | evaluate_retval
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| 78 |
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| 79 | if [ "${failed}" -eq "2" ]; then
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| 80 | boot_mesg "Some uevents escaped from the \"udevsettle\" program" ${FAILURE}
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| 81 | boot_mesg "This is a bug either in the kernel or in the program itself."
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| 82 | boot_mesg "Please mail the /dev/bugreport file to lfs-dev@linuxfromscratch.org."
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| 83 | boot_mesg "Otherwise, the next version of LFS may be unbootable on your system!"
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| 84 | echo_failure
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| 85 | sleep 10
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| 86 | exit 1
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| 87 | fi
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| 88 |
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| 89 | ;;
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| 90 |
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| 91 | *)
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| 92 | echo "Usage ${0} {start}"
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| 93 | exit 1
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| 94 | ;;
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| 95 | esac
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| 96 |
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| 97 | # End $rc_base/init.d/udev
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