nixpkgs/modules/services/misc/autofs.nix
Eelco Dolstra 03ebb883d1 * Modularize filesystem support. Filesystems such as btrfs and
reiserfs now have separate modules that are conditional on
  boot.supportedFilesystems and boot.initrd.supportedFilesystems.
  By default, these include the filesystems specified in the fsType
  attribute in fileSystems.  Ext2/3/4 support is currently
  unconditional.

  Also unbreak the installer test (http://hydra.nixos.org/build/2272302). 

svn path=/nixos/trunk/; revision=32954
2012-03-09 14:37:58 +00:00

129 lines
3.7 KiB
Nix

{ config, pkgs, ... }:
with pkgs.lib;
let
cfg = config.services.autofs;
autoMaster = pkgs.writeText "auto.master" cfg.autoMaster;
in
{
###### interface
options = {
services.autofs = {
enable = mkOption {
default = false;
description = "
Mount filesystems on demand. Unmount them automatically.
You may also be interested in afuese.
";
};
autoMaster = mkOption {
example = literalExample ''
autoMaster = let
mapConf = pkgs.writeText "auto" '''
kernel -ro,soft,intr ftp.kernel.org:/pub/linux
boot -fstype=ext2 :/dev/hda1
windoze -fstype=smbfs ://windoze/c
removable -fstype=ext2 :/dev/hdd
cd -fstype=iso9660,ro :/dev/hdc
floppy -fstype=auto :/dev/fd0
server -rw,hard,intr / -ro myserver.me.org:/ \
/usr myserver.me.org:/usr \
/home myserver.me.org:/home
''';
in '''
/auto file:''${mapConf}
'''
'';
description = "
file contents of /etc/auto.master. See man auto.master
See man 5 auto.master and man 5 autofs.
";
};
kernelModules = mkOption {
default = ["fuse"];
description="kernel modules to load";
};
timeout = mkOption {
default = 600;
description = "Set the global minimum timeout, in seconds, until directories are unmounted";
};
debug = mkOption {
default = false;
description = "
pass -d and -7 to automount and write log to /var/log/autofs
";
};
};
};
###### implementation
config = mkIf cfg.enable {
environment.etc = singleton
{ target = "auto.master";
source = pkgs.writeText "auto.master" cfg.autoMaster;
};
jobs.autofs =
{ description = "Filesystem automounter";
startOn = "started network-interfaces";
stopOn = "stopping network-interfaces";
environment =
{ PATH = "${pkgs.nfsUtils}/sbin:${config.system.sbin.modprobe}/sbin:${pkgs.sshfsFuse}/sbin:${pkgs.sshfsFuse}/bin:$PATH";
};
preStart =
pkgs.lib.concatMapStrings (module : "modprobe ${module} || true\n")
(["autofs4"] ++ cfg.kernelModules);
preStop =
''
set -e; while :; do pkill -TERM automount; sleep 1; done
'';
# automount doesn't clean up when receiving SIGKILL.
# umount -l should unmount the directories recursively when they are no longer used
# It does, but traces are left in /etc/mtab. So unmount recursively..
postStop =
''
PATH=${pkgs.gnused}/bin:${pkgs.coreutils}/bin
exec &> /tmp/logss
# double quote for sed:
escapeSpaces(){ sed 's/ /\\\\040/g'; }
unescapeSpaces(){ sed 's/\\040/ /g'; }
sed -n 's@^\s*\(\([^\\ ]\|\\ \)*\)\s.*@\1@p' ${autoMaster} | sed 's/[\\]//' | while read mountPoint; do
sed -n "s@[^ ]\+\s\+\($(echo "$mountPoint"| escapeSpaces)[^ ]*\).*@\1@p" /proc/mounts | sort -r | unescapeSpaces| while read smountP; do
${pkgs.utillinux}/bin/umount -l "$smountP" || true
done
done
'';
script =
''
${if cfg.debug then "exec &> /var/log/autofs" else ""}
exec ${pkgs.autofs5}/sbin/automount ${if cfg.debug then "-d" else ""} -f -t ${builtins.toString cfg.timeout} "${autoMaster}" ${if cfg.debug then "-l7" else ""}
'';
};
};
}