1 files changed, 53 insertions, 0 deletions
diff --git a/src/log-file.c b/src/log-file.c
new file mode 100644
index 00000000..36d1e8ff
--- /dev/null
+++ b/src/log-file.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2015 Alexandros Frantzis
+ * Author: Alexandros Frantzis <alexandros.frantzis@canonical.com>
+ *
+ * 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 3 of the License, or (at your option) any later
+ * version. See http://www.gnu.org/copyleft/gpl.html the full text of the
+ * license.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+#include "log-file.h"
+
+int
+log_file_open (const gchar *log_filename, LogMode log_mode)
+{
+    int open_flags = O_WRONLY | O_CREAT;
+    int log_fd;
+
+    if (log_mode == LOG_MODE_BACKUP_AND_TRUNCATE)
+    {
+        /* Move old file out of the way */
+        gchar *old_filename;
+
+        old_filename = g_strdup_printf ("%s.old", log_filename);
+        rename (log_filename, old_filename);
+        g_free (old_filename);
+
+        open_flags |= O_TRUNC;
+    }
+    else if (log_mode == LOG_MODE_APPEND)
+    {
+        /* Keep appending to it */
+        open_flags |= O_APPEND;
+    }
+    else
+    {
+        g_warning ("Failed to open log file %s: invalid log mode %d specified",
+                   log_filename, log_mode);
+        return -1;
+    }
+
+    /* Open file and log to it */
+    log_fd = open (log_filename, open_flags, 0600);
+    if (log_fd < 0)
+        g_warning ("Failed to open log file %s: %s", log_filename, g_strerror (errno));
+
+    return log_fd;
+}