[gamin] Define path to gamin config file through env variable

[Christian Reiber <christian reiber zeppelin com>]

Hi,

I needed a way to tell gamin explicitely where to find its config file. 
The available alternatives did not work for me because gamin runs in a 
setup where I want to keep config files self-contained in the application 
setup and not in some "global" or "well-known" location. 

I patched server/gam_conf.c so that an environment variable 
GAMIN_CONFIG_FILE is checked in the first place which should contain the 
path to the config file (including the filename). The usual sequence of 
looking up config file entries is unaffected as the environment variable 
just changes the default for the user config file (~/.gaminrc).

Below is the patch. To apply it go to the directory where your gamin-0.1.9 
directory sits and patch with "patch -p0 <patchfile". It would be great if 
it could make it into the next gamin release.

Christian

### patch starts ###
diff -Nur gamin-0.1.9/server/gam_conf.c 
gamin-0.1.9-patched/server/gam_conf.c
--- gamin-0.1.9/server/gam_conf.c       2007-07-04 13:36:49.000000000 
+0000
+++ gamin-0.1.9-patched/server/gam_conf.c       2008-03-09 
16:42:08.377215240 +0000
@@ -111,7 +111,14 @@
  const char *globalconf = "/etc/gamin/gaminrc";
  const char *mandatory = "/etc/gamin/mandatory_gaminrc";
  gchar *userconf = NULL;
- userconf = g_strconcat(g_get_home_dir(), "/.gaminrc", NULL);
+
+        /* user config file path may be overridden by env variable */
+        userconf = g_strdup(g_getenv("GAMIN_CONFIG_FILE"));
+
+ if (userconf == NULL) {
+    userconf = g_strconcat(g_get_home_dir(), "/.gaminrc", NULL);
+        }
+
  if (userconf == NULL) {
        gam_conf_read_internal (globalconf);
        return;
### patch ends ###

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