Initial refactor of config file handling

[browser-switch] / configfile.c

diff --git a/configfile.c b/configfile.c
new file mode 100644 (file)
index 0000000..ee0e085
--- /dev/null
+++ b/configfile.c
@@ -0,0 +1,53 @@
+/*
+ * configfile.c -- config file functions for browser-switchboard
+ *
+ * Copyright (C) 2009 Steven Luo
+ * Derived from a Python implementation by Jason Simpson and Steven Luo
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "configfile.h"
+
+FILE *open_config_file(void) {
+       char *homedir, *configfile;
+       size_t len;
+       FILE *fp;
+
+       /* Put together the path to the config file */
+       if (!(homedir = getenv("HOME")))
+               homedir = DEFAULT_HOMEDIR;
+       len = strlen(homedir) + strlen(CONFIGFILE_LOC) + 1;
+       if (!(configfile = calloc(len, sizeof(char))))
+               return NULL;
+       snprintf(configfile, len, "%s%s", homedir, CONFIGFILE_LOC);
+
+       /* Try to open the config file */
+       if (!(fp = fopen(configfile, "r"))) {
+               /* Try the legacy config file location before giving up
+                  XXX we assume here that CONFIGFILE_LOC_OLD is shorter
+                  than CONFIGFILE_LOC! */
+               snprintf(configfile, len, "%s%s", homedir, CONFIGFILE_LOC_OLD);
+               fp = fopen(configfile, "r");
+       }
+
+       free(configfile);
+       return fp;
+}