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+title: Mounting music dir before MPD
+tags: systemd, mpd, config
+date: 2013-11-24 14:03
+format: md
+Systemd allows you to specify a program to run before running the main
+daemon (or program) with `ExecStartPre`. This can, for instance, be
+used to run a mount command before starting `mpd`. By adding under the
+`[Service]` heading:
+ ExecStartPre=/usr/bin/mount /mnt/music
+Now I have already setup my `fstab` to know what to mount on
+`/mnt/music`, but of course that shouldn't be necessary. According to
+the `systemd.service(5)` man page it uses the same syntax as
+`ExecStart`, which tells us that one must use absolute file names
+since no shell is used to start them.
+This also has the effect of stopping the `ExecStart` part from the
+`.service` from being executed if the `ExecStartPre` doesn't finish
+successfully. Which works out great in my case as I don't want to
+start `mpd` if my music directory didn't mount. If you want to ignore
+the exit status of (one of) the `ExecStartPre` commands you can prefix
+it with a `-`, for example:
+ ExecStartPre=-/usr/bin/mount /mnt/music
+Which would continue running the `ExecStart` even if mounting failed.
+Also know that there can be multiple `ExecStartPre` options and they
+will be executed serially, so for example:
+ ExecStartPre=/usr/bin/mount /mnt/music
+ ExecStartPre=-/usr/bin/mount /mnt/music2
+This would fail if `/mnt/music` doesn't mount, but would continue just
+fine if `/mnt/music` did and `/mnt/music2` didn't.