nixpkgs/upstart-jobs/filesystems.nix
Eelco Dolstra cb4e81d38f * Handle devices that are symlinks.
svn path=/nixos/trunk/; revision=7477
2006-12-24 00:54:52 +00:00

90 lines
2.5 KiB
Nix

{utillinux, e2fsprogs, fileSystems}:
let
# !!! use XML
mountPoints = map (fs: fs.mountPoint) fileSystems;
devices = map (fs: fs.device) fileSystems;
fsTypes = map (fs: if fs ? fsType then fs.fsType else "auto") fileSystems;
optionss = map (fs: if fs ? options then fs.options else "defaults") fileSystems;
in
{
name = "filesystems";
job = "
start on startup
start on new-devices
script
PATH=${e2fsprogs}/sbin:$PATH
mountPoints=(${toString mountPoints})
devices=(${toString devices})
fsTypes=(${toString fsTypes})
optionss=(${toString optionss})
newDevices=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 \"$newDevices\"; do
newDevices=
for ((n = 0; n < \${#mountPoints[*]}; n++)); do
mountPoint=\${mountPoints[$n]}
device=\${devices[$n]}
fsType=\${fsTypes[$n]}
options=\${optionss[$n]}
if ! test -e \"$device\"; then
echo \"skipping $device, doesn't exist (yet)\"
continue
fi
device=$(readlink -f \"$device\")
# 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 $mountPoint\"
# !!! should do something with the result; also prevent repeated fscks.
fsck -a \"$device\" || true
if ${utillinux}/bin/mount -t \"$fsType\" -o \"$options\" \"$device\" \"$mountPoint\"; then
newDevices=1
fi
done
done
end script
";
}