126 lines
3.6 KiB
Nix
126 lines
3.6 KiB
Nix
{pkgs, config, ...}:
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###### implementation
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let
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inherit (pkgs) e2fsprogs;
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mountPoints = map (fs: fs.mountPoint) fileSystems;
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fileSystems = config.fileSystems;
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devices = map (fs: if fs ? device then fs.device else "LABEL=" + fs.label) fileSystems;
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fsTypes = map (fs: if fs ? fsType then fs.fsType else "auto") fileSystems;
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optionss = map (fs: if fs ? options then fs.options else "defaults") fileSystems;
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autocreates = map (fs: if fs ? autocreate then fs.autocreate else "0") fileSystems;
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mount = config.system.sbin.mount;
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job = ''
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start on startup
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start on new-devices
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start on ip-up
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script
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PATH=${e2fsprogs}/sbin:$PATH
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mountPoints=(${toString mountPoints})
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devices=(${toString devices})
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fsTypes=(${toString fsTypes})
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optionss=(${toString optionss})
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autocreates=(${toString autocreates})
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newDevices=1
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# If we mount any file system, we repeat this loop, because new
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# mount opportunities may have become available (such as images
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# for loopback mounts).
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while test -n "$newDevices"; do
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newDevices=
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for ((n = 0; n < ''${#mountPoints[*]}; n++)); do
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mountPoint=''${mountPoints[$n]}
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device=''${devices[$n]}
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fsType=''${fsTypes[$n]}
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options=''${optionss[$n]}
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autocreate=''${autocreates[$n]}
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isLabel=
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if echo "$device" | grep -q '^LABEL='; then isLabel=1; fi
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isPseudo=
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if test "$fsType" = "nfs" || test "$fsType" = "tmpfs" ||
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test "$fsType" = "ext3cow"; then isPseudo=1; fi
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if ! test -n "$isLabel" -o -n "$isPseudo" -o -e "$device"; then
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echo "skipping $device, doesn't exist (yet)"
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continue
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fi
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# !!! quick hack: if mount point already exists, try a
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# remount to change the options but nothing else.
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if cat /proc/mounts | grep -F -q " $mountPoint "; then
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echo "remounting $device on $mountPoint"
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${mount}/bin/mount -t "$fsType" \
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-o remount,"$options" \
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"$device" "$mountPoint" || true
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continue
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fi
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# If $device is already mounted somewhere else, unmount it first.
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# !!! Note: we use /etc/mtab, not /proc/mounts, because mtab
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# contains more accurate info when using loop devices.
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# !!! not very smart about labels yet; should resolve the label somehow.
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if test -z "$isLabel" -a -z "$isPseudo"; then
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device=$(readlink -f "$device")
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prevMountPoint=$(
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cat /etc/mtab \
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| grep "^$device " \
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| sed 's|^[^ ]\+ \+\([^ ]\+\).*|\1|' \
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)
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if test "$prevMountPoint" = "$mountPoint"; then
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echo "remounting $device on $mountPoint"
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${mount}/bin/mount -t "$fsType" \
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-o remount,"$options" \
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"$device" "$mountPoint" || true
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continue
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fi
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if test -n "$prevMountPoint"; then
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echo "unmount $device from $prevMountPoint"
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${mount}/bin/umount "$prevMountPoint" || true
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fi
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fi
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echo "mounting $device on $mountPoint"
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# !!! should do something with the result; also prevent repeated fscks.
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if test -z "$isPseudo"; then
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fsck -a "$device" || true
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fi
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if test "$autocreate" = 1; then mkdir -p "$mountPoint"; fi
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if ${mount}/bin/mount -t "$fsType" -o "$options" "$device" "$mountPoint"; then
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newDevices=1
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fi
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done
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done
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end script
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'';
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in
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{
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services = {
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extraJobs = [{
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name = "filesystems";
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inherit job;
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}];
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};
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}
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