add debug handler

1 files changed, 45 insertions, 0 deletions

diff --git a/debug.c b/debug.c
new file mode 100644
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);
+}