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29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
121 lines
3.3 KiB
Nix
121 lines
3.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.autofs;
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autoMaster = pkgs.writeText "auto.master" cfg.autoMaster;
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in
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{
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###### interface
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options = {
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services.autofs = {
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enable = mkOption {
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default = false;
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description = "
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Mount filesystems on demand. Unmount them automatically.
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You may also be interested in afuese.
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";
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};
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autoMaster = mkOption {
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example = literalExample ''
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autoMaster = let
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mapConf = pkgs.writeText "auto" '''
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kernel -ro,soft,intr ftp.kernel.org:/pub/linux
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boot -fstype=ext2 :/dev/hda1
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windoze -fstype=smbfs ://windoze/c
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removable -fstype=ext2 :/dev/hdd
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cd -fstype=iso9660,ro :/dev/hdc
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floppy -fstype=auto :/dev/fd0
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server -rw,hard,intr / -ro myserver.me.org:/ \
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/usr myserver.me.org:/usr \
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/home myserver.me.org:/home
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''';
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in '''
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/auto file:''${mapConf}
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'''
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'';
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description = "
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file contents of /etc/auto.master. See man auto.master
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See man 5 auto.master and man 5 autofs.
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";
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};
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timeout = mkOption {
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default = 600;
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description = "Set the global minimum timeout, in seconds, until directories are unmounted";
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};
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debug = mkOption {
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default = false;
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description = "
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pass -d and -7 to automount and write log to /var/log/autofs
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";
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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environment.etc = singleton
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{ target = "auto.master";
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source = pkgs.writeText "auto.master" cfg.autoMaster;
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};
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boot.kernelModules = [ "autofs4" ];
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jobs.autofs =
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{ description = "Filesystem automounter";
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startOn = "started network-interfaces";
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stopOn = "stopping network-interfaces";
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path = [ pkgs.nfsUtils pkgs.sshfsFuse ];
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preStop =
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''
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set -e; while :; do pkill -TERM automount; sleep 1; done
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'';
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# automount doesn't clean up when receiving SIGKILL.
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# umount -l should unmount the directories recursively when they are no longer used
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# It does, but traces are left in /etc/mtab. So unmount recursively..
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postStop =
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''
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PATH=${pkgs.gnused}/bin:${pkgs.coreutils}/bin
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exec &> /tmp/logss
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# double quote for sed:
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escapeSpaces(){ sed 's/ /\\\\040/g'; }
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unescapeSpaces(){ sed 's/\\040/ /g'; }
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sed -n 's@^\s*\(\([^\\ ]\|\\ \)*\)\s.*@\1@p' ${autoMaster} | sed 's/[\\]//' | while read mountPoint; do
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sed -n "s@[^ ]\+\s\+\($(echo "$mountPoint"| escapeSpaces)[^ ]*\).*@\1@p" /proc/mounts | sort -r | unescapeSpaces| while read smountP; do
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${pkgs.utillinux}/bin/umount -l "$smountP" || true
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done
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done
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'';
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script =
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''
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${if cfg.debug then "exec &> /var/log/autofs" else ""}
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exec ${pkgs.autofs5}/sbin/automount ${if cfg.debug then "-d" else ""} -f -t ${builtins.toString cfg.timeout} "${autoMaster}" ${if cfg.debug then "-l7" else ""}
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'';
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};
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};
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}
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