lsusb: new applet. +400 bytes

Signed-off-by: Souf Oued <souf_oued@yahoo.fr>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

3 files changed, 77 insertions, 0 deletions

diff --git a/util-linux/Config.in b/util-linux/Config.in
index 94337df8e..f04511bb1 100644
--- a/util-linux/Config.in
+++ b/util-linux/Config.in
@@ -357,6 +357,15 @@ config LSPCI
 
           This version uses sysfs (/sys/bus/pci/devices) only.
 
+config LSUSB
+        bool "lsusb"
+        default n
+        help
+          lsusb is a utility for displaying information about USB buses in the
+          system and devices connected to them.
+
+          This version uses sysfs (/sys/bus/usb/devices) only.
+
 config MDEV
         bool "mdev"
         default n
diff --git a/util-linux/Kbuild b/util-linux/Kbuild
index 3004fd0a0..72a2ef1cd 100644
--- a/util-linux/Kbuild
+++ b/util-linux/Kbuild
@@ -22,6 +22,7 @@ lib-$(CONFIG_IPCRM)             += ipcrm.o
 lib-$(CONFIG_IPCS)              += ipcs.o
 lib-$(CONFIG_LOSETUP)           += losetup.o
 lib-$(CONFIG_LSPCI)             += lspci.o
+lib-$(CONFIG_LSUSB)             += lsusb.o
 lib-$(CONFIG_MDEV)              += mdev.o
 lib-$(CONFIG_MKFS_EXT2)         += mkfs_ext2.o
 lib-$(CONFIG_MKFS_MINIX)        += mkfs_minix.o
diff --git a/util-linux/lsusb.c b/util-linux/lsusb.c
new file mode 100644
index 000000000..7c5b6b947
--- /dev/null
+++ b/util-linux/lsusb.c
@@ -0,0 +1,67 @@
+/* vi: set sw=4 ts=4: */
+/*
+* lspci implementation for busybox
+*
+* Copyright (C) 2009  Malek Degachi <malek-degachi@laposte.net>
+*
+* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+*/
+#include <libbb.h>
+
+static int FAST_FUNC fileAction(
+                const char *fileName,
+                struct stat *statbuf UNUSED_PARAM,
+                void *userData UNUSED_PARAM,
+                int depth UNUSED_PARAM)
+{
+        parser_t *parser;
+        char *tokens[6];
+        char *bus = NULL, *device = NULL;
+        int product_vid = 0, product_did = 0;
+
+        char *uevent_filename = concat_path_file(fileName, "/uevent");
+        parser = config_open2(uevent_filename, fopen_for_read);
+        free(uevent_filename);
+
+        while (config_read(parser, tokens, 6, 1, "\\/=", PARSE_NORMAL)) {
+                if ((parser->lineno == 1) && strcmp(tokens[0], "DEVTYPE") == 0) {
+                        break;
+                }
+
+                if (strcmp(tokens[0], "DEVICE") == 0) {
+                        bus = xstrdup(tokens[4]);
+                        device = xstrdup(tokens[5]);
+                        continue;
+                }
+
+                if (strcmp(tokens[0], "PRODUCT") == 0) {
+                        product_vid = xstrtou(tokens[1], 16);
+                        product_did = xstrtou(tokens[2], 16);
+                        continue;
+                }
+        }
+        config_close(parser);
+
+        if (bus) {
+                printf("Bus %s Device %s: ID %04x:%04x\n", bus, device, product_vid, product_did);
+                free(bus);
+                free(device);
+        }
+
+        return TRUE;
+}
+
+int lsusb_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int lsusb_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
+{
+        /* no options, no getopt */
+
+        recursive_action("/sys/bus/usb/devices",
+                        ACTION_RECURSE,
+                        fileAction,
+                        NULL, /* dirAction */
+                        NULL, /* userData */
+                        0 /* depth */);
+
+        return EXIT_SUCCESS;
+}