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* Mount file systems until a fixpoint is reached.

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* Work properly for loopback mounts.

svn path=/nixos/trunk/; revision=7453
This commit is contained in:
Eelco Dolstra 2006-12-21 18:10:33 +00:00
parent f89f3c0643
commit bf8e19f6db
1 changed files with 41 additions and 19 deletions
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60
upstart-jobs/filesystems.nix
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@ -23,30 +23,52 @@ script
fsTypes=(${toString fsTypes})
optionss=(${toString optionss})
for ((n = 0; n < \${#mountPoints[*]}; n++)); do
mountPoint=\${mountPoints[$n]}
device=\${devices[$n]}
fsType=\${fsTypes[$n]}
options=\${optionss[$n]}
newDevices=1
# If $device is already mounted somewhere else, unmount it first.
prevMountPoint=$(cat /proc/mounts | grep \"^$device \" | sed 's|^[^ ]\\+ \\+\\([^ ]\\+\\).*|\\1|')
# If we mount any file system, we repeat this loop, because new
# mount opportunities may have become available (such as images
# for loopback mounts).
while test -n \"$newDevices\"; do
if test \"$prevMountPoint\" = \"$mountPoint\"; then
echo \"remounting $device on $mountPoint\"
${utillinux}/bin/mount -t \"$fsType\" -o remount,\"$options\" \"$device\" \"$mountPoint\" || true
continue
fi
newDevices=
if test -n \"$prevMountPoint\"; then
echo \"unmount $device from $prevMountPoint\"
${utillinux}/bin/umount \"$prevMountPoint\" || true
fi
for ((n = 0; n < \${#mountPoints[*]}; n++)); do
mountPoint=\${mountPoints[$n]}
device=\${devices[$n]}
fsType=\${fsTypes[$n]}
options=\${optionss[$n]}
echo \"mounting $device on $mountPoint\"
# If $device is already mounted somewhere else, unmount it first.
# !!! Note: we use /etc/mtab, not /proc/mounts, because mtab
# contains more accurate info when using loop devices.
prevMountPoint=$(
cat /etc/mtab \\
| grep \"^$device \" \\
| sed 's|^[^ ]\\+ \\+\\([^ ]\\+\\).*|\\1|' \\
)
if test \"$prevMountPoint\" = \"$mountPoint\"; then
echo \"remounting $device on $mountPoint\"
${utillinux}/bin/mount -t \"$fsType\" \\
-o remount,\"$options\" \\
\"$device\" \"$mountPoint\" || true
continue
fi
if test -n \"$prevMountPoint\"; then
echo \"unmount $device from $prevMountPoint\"
${utillinux}/bin/umount \"$prevMountPoint\" || true
fi
echo \"mounting $device on $mountPoint\"
if ${utillinux}/bin/mount -t \"$fsType\" -o \"$options\" \"$device\" \"$mountPoint\"; then
newDevices=1
fi
done
mkdir -p \"$mountPoint\" || true
${utillinux}/bin/mount -t \"$fsType\" -o \"$options\" \"$device\" \"$mountPoint\" || true
done
end script