45 lines
1.2 KiB
Bash
Executable File
45 lines
1.2 KiB
Bash
Executable File
#!/bin/sh -f
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#
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# create /dev/disk/by-* and /dev/mapper/* symlinks
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create_symlink()
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{
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dir="$1"; sym="$2"
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sym="${sym%\"}"
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sym="${sym#\"}"
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sym="${dir}/${sym}"
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mkdir -p "$dir"
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ln -s "../../${dev_name}" "$sym"
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}
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# DEVPATH is part of uevent which is exported to environment by device manager.
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[ -b "/dev/${dev_name=${DEVPATH##*/}}" ] || exit 1
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exec > /dev/null 2>&1
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read -r dm_name < "/sys/block/${dev_name}/dm/name" && {
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mkdir -p /dev/mapper
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ln -sf "../${dev_name}" "/dev/mapper/${dm_name:?}"
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}
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command -v blkid || exit 0
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# Race condition may occur if uevent arrives faster(isn't that a kernel bug!?)
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# than the kernel initializes device. This prevents blkid to fetch data from
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# device. To fix this, we simply waiting until blkid is succeeded.
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while ! blkid "/dev/${dev_name}"; do
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if [ "$((count += 1))" = 30 ]; then
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exit 1
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else
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sleep 1
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fi
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done
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for line in $(blkid "/dev/${dev_name}"); do case "${line%%=*}" in
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UUID) create_symlink /dev/disk/by-uuid "${line##*=}" ;;
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LABEL) create_symlink /dev/disk/by-label "${line##*=}" ;;
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PARTUUID) create_symlink /dev/disk/by-partuuid "${line##*=}" ;;
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esac; done
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