commit ac2c8e14959694bfbb91db1772362a07006e61af
parent fc7c1c0a881a08272afd71204ad2de5c6239e2e7
Author: sin <sin@2f30.org>
Date: Tue, 3 Sep 2013 13:52:47 +0100
Add barebones lsusb(8)
Diffstat:
| M | Makefile | | | 1 | + |
| A | lsusb.c | | | 55 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
2 files changed, 56 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -25,6 +25,7 @@ SRC = \
halt.c \
insmod.c \
lsmod.c \
+ lsusb.c \
mkswap.c \
mount.c \
mountpoint.c \
diff --git a/lsusb.c b/lsusb.c
@@ -0,0 +1,55 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#include "util.h"
+
+static void lsusb(const char *file);
+
+static void
+usage(void)
+{
+ eprintf("usage: %s\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+ ARGBEGIN {
+ default:
+ usage();
+ } ARGEND;
+
+ recurse("/sys/bus/usb/devices", lsusb);
+ return 0;
+}
+
+static void
+lsusb(const char *file)
+{
+ FILE *fp;
+ char *cwd;
+ char path[PATH_MAX];
+ char buf[BUFSIZ];
+ int busnum, devnum, pid, vid;
+ int i = 0;
+
+ cwd = agetcwd();
+ snprintf(path, sizeof(path), "%s/%s/uevent", cwd, file);
+ free(cwd);
+ if (!(fp = fopen(path, "r")))
+ return;
+ while (fgets(buf, sizeof(buf), fp)) {
+ if (sscanf(buf, "BUSNUM=%u\n", &busnum) ||
+ sscanf(buf, "DEVNUM=%u\n", &devnum) ||
+ sscanf(buf, "PRODUCT=%x/%x/", &pid, &vid))
+ i++;
+ if (i == 3) {
+ printf("Bus %03d Device %03d: ID %04x:%04x\n", busnum, devnum,
+ pid, vid);
+ break;
+ }
+ }
+ fclose(fp);
+}
+
