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|
{ config, lib, pkgs, ... }:
with 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:''${mapConf}
'''
'';
description = "
file contents of /etc/auto.master. See man auto.master
See man 5 auto.master and man 5 autofs.
";
};
timeout = mkOption {
default = 600;
description = "Set the global minimum timeout, in seconds, until directories are unmounted";
};
debug = mkOption {
default = false;
description = "
pass -d and -7 to automount and write log to /var/log/autofs
";
};
};
};
###### implementation
config = mkIf cfg.enable {
environment.etc = singleton
{ target = "auto.master";
source = pkgs.writeText "auto.master" cfg.autoMaster;
};
boot.kernelModules = [ "autofs4" ];
jobs.autofs =
{ description = "Filesystem automounter";
startOn = "started network-interfaces";
stopOn = "stopping network-interfaces";
path = [ pkgs.nfs-utils pkgs.sshfsFuse ];
preStop =
''
set -e; while :; do pkill -TERM automount; sleep 1; done
'';
# automount doesn't clean up when receiving SIGKILL.
# umount -l should unmount the directories recursively when they are no longer used
# It does, but traces are left in /etc/mtab. So unmount recursively..
postStop =
''
PATH=${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 ""}
'';
};
};
}
|
