shared: Add helper for looking up debugfs mount point

2 files changed, 90 insertions, 0 deletions

diff --git a/src/shared/debugfs.c b/src/shared/debugfs.c
new file mode 100644
index 00000000..f522c518
--- /dev/null
+++ b/src/shared/debugfs.c
@@ -0,0 +1,66 @@
+/*
+ *
+ *  Connection Manager
+ *
+ *  Copyright (C) 2012  Intel Corporation. All rights reserved.
+ *
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <limits.h>
+
+#include "src/shared/debugfs.h"
+
+#define STRINGIFY(x) STRINGIFY_ARG(x)
+#define STRINGIFY_ARG(x) #x
+
+const char *debugfs_get_path(void)
+{
+	static char path[PATH_MAX + 1];
+	static bool found = false;
+	char type[100];
+	FILE *fp;
+
+	if (found)
+		return path;
+
+	fp = fopen("/proc/mounts", "r");
+	if (!fp)
+		return NULL;
+
+	while (fscanf(fp, "%*s %" STRINGIFY(PATH_MAX) "s %99s %*s %*d %*d\n",
+							path, type) == 2) {
+		if (!strcmp(type, "debugfs")) {
+			found = true;
+			break;
+		}
+	}
+
+	fclose(fp);
+
+	if (!found)
+		return NULL;
+
+	return path;
+}
diff --git a/src/shared/debugfs.h b/src/shared/debugfs.h
new file mode 100644
index 00000000..7f41ca7f
--- /dev/null
+++ b/src/shared/debugfs.h
@@ -0,0 +1,24 @@
+/*
+ *
+ *  Connection Manager
+ *
+ *  Copyright (C) 2012  Intel Corporation. All rights reserved.
+ *
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+const char *debugfs_get_path(void);