mirror of
https://git.yoctoproject.org/poky
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44 lines
1.0 KiB
Bash
44 lines
1.0 KiB
Bash
#! /bin/sh
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#
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# umountfs Turn off swap and unmount all local filesystems.
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#
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PATH=/sbin:/bin:/usr/sbin:/usr/bin
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# Ensure /proc is mounted
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test -r /proc/mounts || mount -t proc proc /proc
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echo "Deactivating swap..."
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swapoff -a
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# We leave /proc mounted, the umount of /dev/devpts seems to fail
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# quite frequently, the busybox umount apparently gives up at the
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# first failure, so it is necessary to go file system by file
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# system. It is necessary to go backward in the /proc list, because
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# later things may have been mounted on earlier mounts.
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devfs=
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unmount() {
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local dev mp type opts
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if read dev mp type opts
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then
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# recurse - unmount later items
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unmount
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# skip /proc and /dev but not the sub-directories
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case "$mp" in
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/|/proc)return 0;;
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/dev) devfs=1
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return 0;;
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esac
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# then unmount this, if possible, otherwise make
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# it read-only
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umount -f -r "$mp"
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fi
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}
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echo "Unmounting local filesystems..."
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unmount </proc/mounts
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# now /dev and read-only / (halt/reboot may need /proc!)
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test -n "$devfs" && umount -f -r /dev
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mount -o remount,ro /
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