82 lines
2.3 KiB
Bash
Executable File
82 lines
2.3 KiB
Bash
Executable File
#!/bin/sh
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#
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# udev This is a minimal non-LSB version of a UDEV startup script. It
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# was derived by stripping down the udev-058 LSB version for use
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# with buildroot on embedded hardware using Linux 2.6.12+ kernels.
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#
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# You may need to customize this for your system's resource limits
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# (including startup time!) and administration. For example, if
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# your early userspace has a custom initramfs or initrd you might
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# need /dev much earlier; or without hotpluggable busses (like USB,
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# PCMCIA, MMC/SD, and so on) your /dev might be static after boot.
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#
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# This script assumes your system boots right into the eventual root
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# filesystem, and that init runs this udev script before any programs
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# needing more device nodes than the bare-bones set -- /dev/console,
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# /dev/zero, /dev/null -- that's needed to boot and run this script.
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#
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# old kernels don't use udev
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case $(uname -r) in
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2.6*|2.7*) ;;
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*) exit 0;;
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esac
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# Check for missing binaries
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UDEV_BIN=/sbin/udevd
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test -x $UDEV_BIN || exit 5
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UDEVSTART_BIN=/sbin/udevstart
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test -x $UDEVSTART_BIN || exit 5
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# Check for config file and read it
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UDEV_CONFIG=/etc/udev/udev.conf
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test -r $UDEV_CONFIG || exit 6
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. $UDEV_CONFIG
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# Directory where sysfs is mounted
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SYSFS_DIR=/sys
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case "$1" in
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start)
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# mount sysfs if it's not yet mounted
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if [ ! -d $SYSFS_DIR ]; then
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echo "${0}: SYSFS_DIR \"$SYSFS_DIR\" not found"
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exit 1
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fi
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grep -q "^sysfs $SYSFS_DIR" /proc/mounts ||
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mount -t sysfs /sys /sys ||
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exit 1
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# mount $udev_root as ramfs if it's not yet mounted
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# we know 2.6 kernels always support ramfs
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if [ ! -d $udev_root ]; then
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echo "${0}: udev_root \"$udev_root\" not found"
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exit 1
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fi
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grep -q "^udev $udev_root" /proc/mounts ||
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mount -t ramfs udev $udev_root ||
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exit 1
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mkdir $udev_root/pts $udev_root/shm
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# populate /dev (normally)
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echo -n "Populating $udev_root using udev: "
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echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug
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$UDEV_BIN -d || (echo "FAIL" && exit 1)
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$UDEVSTART_BIN || (echo "FAIL" && exit 1)
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echo "done"
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;;
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stop)
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# Stop execution of events
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udevcontrol stop_exec_queue
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killall udevd
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;;
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*)
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echo "Usage: $0 {start|stop}"
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exit 1
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;;
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esac
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exit 0
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