From bada4ecc1a09a3e4a98ae3449f6e6e7e6de19fef Mon Sep 17 00:00:00 2001
From: Tom Willemse
Date: Fri, 2 Jan 2015 03:40:45 +0100
Subject: Initial commit

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 mounting-music-dir-before-mpd.post | 39 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 mounting-music-dir-before-mpd.post

(limited to 'mounting-music-dir-before-mpd.post')

diff --git a/mounting-music-dir-before-mpd.post b/mounting-music-dir-before-mpd.post
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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.
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