add debug handler

diff --git a/debug.c b/debug.c
new file mode 100644 (file)
index 0000000..7d7798b
--- /dev/null
+++ b/debug.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * 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.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <regex.h>
+#include <unistd.h>
+
+#include "procd.h"
+
+unsigned int debug = 0;
+
+void debug_init(void)
+{
+       char line[256];
+       int r, fd = open("/proc/cmdline", O_RDONLY);
+       regex_t pat_cmdline;
+       regmatch_t matches[2];
+
+       if (!fd)
+               return;
+
+       r = read(fd, line, sizeof(line) - 1);
+       line[r] = '\0';
+       close(fd);
+
+       regcomp(&pat_cmdline, "init_debug=([0-9]*)", REG_EXTENDED);
+       if (!regexec(&pat_cmdline, line, 2, matches, 0)) {
+               line[matches[1].rm_eo] = '\0';
+               debug = atoi(&line[matches[1].rm_so]);
+       }
+       regfree(&pat_cmdline);
+}