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.nfs-utils 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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