| 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
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| 8 | #
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| 9 | # Version : 00.01
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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 | . ${rc_functions}
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| 17 |
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| 18 | # Create some things that sysfs does not, and should not export for us. Feel
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| 19 | # free to add devices to this list.
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| 20 | make_extra_nodes() {
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| 21 | ln -s /proc/self/fd /dev/fd
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| 22 | ln -s /proc/self/fd/0 /dev/stdin
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| 23 | ln -s /proc/self/fd/1 /dev/stdout
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| 24 | ln -s /proc/self/fd/2 /dev/stderr
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| 25 | ln -s /proc/kcore /dev/core
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| 26 | mkdir /dev/pts
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| 27 | mkdir /dev/shm
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| 28 | }
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| 29 |
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| 30 | case "${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 | boot_log " The SysFS filesystem could not be found. Unable to continue."
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| 35 | echo_failure
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| 36 | boot_mesg -n "FAILURE:\n\nUnable to create" ${FAILURE}
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| 37 | boot_mesg -n " devices without a SysFS filesystem"
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| 38 | boot_mesg -n "\n\nAfter you press Enter, this system"
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| 39 | boot_mesg -n " will be halted and powered off."
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| 40 | boot_mesg -n "\n\nPress Enter to continue..." ${INFO}
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| 41 | boot_mesg "" ${NORMAL}
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| 42 | read ENTER
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| 43 | /etc/rc.d/init.d/halt stop
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| 44 | fi
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| 45 |
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| 46 | # Mount a temporary file system over /dev, so that any devices
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| 47 | # made or removed during this boot don't affect the next one.
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| 48 | # The reason we don't write to mtab is because we don't ever
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| 49 | # want /dev to be unavailable (such as by `umount -a').
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| 50 | mount -n -t tmpfs tmpfs /dev -o mode=755
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| 51 | if [ ${?} != 0 ]; then
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| 52 | boot_log "Unable to mount a tmpfs onto /dev."
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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 | read ENTER
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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 | # Assign udevsend to get hotplug events. udevsend can manage the whole
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| 65 | # hotplug handling by taking over the kernel spawned event process
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| 66 | echo /sbin/udevsend > /proc/sys/kernel/hotplug
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| 67 |
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| 68 | # Populate /dev with all the devices that are already available,
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| 69 | # and save it's status so we can report failures.
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| 70 | udevstart || failed=1
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| 71 |
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| 72 | # Now, create some required files/directories/devices that sysfs
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| 73 | # doesn't export for us.
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| 74 | make_extra_nodes
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| 75 |
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| 76 | # When reporting the status, base it on the success or failure
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| 77 | # of the `udevstart' command, since that's the most important.
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| 78 | (exit ${failed})
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| 79 | evaluate_retval
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| 80 | ;;
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| 81 |
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| 82 | *)
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| 83 | echo "Usage ${0} {start}"
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| 84 | exit 1
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| 85 | ;;
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| 86 | esac
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| 87 |
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| 88 | # End $rc_base/init.d/udev
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