diff options
Diffstat (limited to 'recipes/initscripts/initscripts-1.0/slugos/umountfs')
| -rw-r--r-- | recipes/initscripts/initscripts-1.0/slugos/umountfs | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/recipes/initscripts/initscripts-1.0/slugos/umountfs b/recipes/initscripts/initscripts-1.0/slugos/umountfs new file mode 100644 index 0000000000..5580d7bb47 --- /dev/null +++ b/recipes/initscripts/initscripts-1.0/slugos/umountfs @@ -0,0 +1,43 @@ +#!/bin/sh +# +# umountfs Turn off swap and unmount all local filesystems. +# + +PATH=/sbin:/bin:/usr/sbin:/usr/bin + +# Ensure /proc is mounted +test -r /proc/mounts || mount -t proc proc /proc + +echo "Deactivating swap..." +swapoff -a + +# We leave /proc mounted, the umount of /dev/devpts seems to fail +# quite frequently, the busybox umount apparently gives up at the +# first failure, so it is necessary to go file system by file +# system. It is necessary to go backward in the /proc list, because +# later things may have been mounted on earlier mounts. +devfs= +unmount() { + local dev mp type opts + if read dev mp type opts + then + # recurse - unmount later items + unmount + # skip /proc and /dev but not the sub-directories + case "$mp" in + /|/proc)return 0;; + /dev) devfs=1 + return 0;; + esac + # then unmount this, if possible, otherwise make + # it read-only + umount -f -r "$mp" + fi +} + +echo "Unmounting local filesystems..." +unmount </proc/mounts + +# now /dev and read-only / (halt/reboot may need /proc!) +test -n "$devfs" && umount -f -r /dev +mount -o remount,ro / |