[PATCH] I2C bus fake enumeration applet lsi2c

[alison at she-devel.com]

From: Alison Chaiken <alison_chaiken at mentor.com>

Signed-off-by: Alison Chaiken <alison_chaiken at mentor.com>
---
 util-linux/lsi2c.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 util-linux/lsi2c.c

diff --git a/util-linux/lsi2c.c b/util-linux/lsi2c.c
new file mode 100644
index 0000000..d87ff42
--- /dev/null
+++ b/util-linux/lsi2c.c
@@ -0,0 +1,55 @@
+/*
+ * lsi2c implementation for busybox
+ *
+ * Copyright (C) 2013, 2014 Alison Chaiken alison at she-devel.com,
+ *                          Souf Oued souf_oued at yahoo.fr
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+//usage:#define lsi2c_trivial_usage NOUSAGE_STR
+//usage:#define lsi2c_full_usage ""
+
+#include "libbb.h"
+
+static int FAST_FUNC fileAction(
+				const char *instring,
+				struct stat *statbuf UNUSED_PARAM,
+				void *userData UNUSED_PARAM,
+				int depth)
+{
+	const char *sysfs_node, *drivername;
+	char *address;
+
+	sysfs_node = bb_basename(instring);
+
+	if (!isdigit(sysfs_node[0])) {
+		depth++;
+		return depth;
+	}
+
+	drivername = bb_basename(dirname((char *)instring));
+	address = strchr(sysfs_node, '-');
+
+	if (*address++)
+		printf("Controller %c for driver %s at address 0x%s.\n", *sysfs_node,
+		   drivername, address);
+
+	return 0;
+}
+
+int lsi2c_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int lsi2c_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
+{
+	const char *fileName = "/sys/bus/i2c/drivers";
+	int depth = 0;
+
+	recursive_action(fileName,
+				ACTION_RECURSE,
+				fileAction,
+				NULL, /* dirAction */
+				NULL, /* userData */
+				depth);
+
+	return EXIT_SUCCESS;
+}
-- 
1.8.5.2