qga: add QGA_CONF environment variable

Having a environment variable allows to override default configuration
path, useful for testing. Note that this can't easily be an argument,
since loading config is done before parsing the arguments.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/qga/main.c b/qga/main.c
index d8e063a..18e1e1d 100644 (file)
--- a/qga/main.c
+++ b/qga/main.c
@@ -945,10 +945,11 @@ static void config_load(GAConfig *config)
 {
     GError *gerr = NULL;
     GKeyFile *keyfile;
+    const char *conf = g_getenv("QGA_CONF") ?: QGA_CONF_DEFAULT;
 
     /* read system config */
     keyfile = g_key_file_new();
-    if (!g_key_file_load_from_file(keyfile, QGA_CONF_DEFAULT, 0, &gerr)) {
+    if (!g_key_file_load_from_file(keyfile, conf, 0, &gerr)) {
         goto end;
     }
     if (g_key_file_has_key(keyfile, "general", "daemon", NULL)) {