1/* See LICENSE file for copyright and license details. */
 2
 3#include <limits.h>
 4#include <stdio.h>
 5#include <stdlib.h>
 6
 7#include "paths.h"
 8#include "text.h"
 9#include "util.h"
10
11static void
12lsusb(const char *file)
13{
14  FILE        *fp;
15  char         path[PATH_MAX];
16  char        *buf  = NULL;
17  size_t       size = 0;
18  unsigned int i = 0, busnum = 0, devnum = 0, pid = 0, vid = 0;
19
20  if (strlcpy(path, file, sizeof(path)) >= sizeof(path))
21    eprintf("path too long\n");
22  if (strlcat(path, "/uevent", sizeof(path)) >= sizeof(path))
23    eprintf("path too long\n");
24
25  if (!(fp = fopen(path, "r")))
26    return;
27  while (agetline(&buf, &size, fp) != -1) {
28    if (sscanf(buf, "BUSNUM=%u\n", &busnum) || sscanf(buf, "DEVNUM=%u\n", &devnum)
29        || sscanf(buf, "PRODUCT=%x/%x/", &pid, &vid))
30      i++;
31    if (i == 3) {
32      printf("Bus %03d Device %03d: ID %04x:%04x\n", busnum, devnum, pid, vid);
33      break;
34    }
35  }
36  if (ferror(fp))
37    eprintf("%s: read error:", path);
38  free(buf);
39  fclose(fp);
40}
41
42static void
43usage(void)
44{
45  eprintf("usage: %s\n", argv0);
46}
47
48// ?man lsusb: list usb devices
49// ?man display information about usb buses and connected devices
50int
51main(int argc, char *argv[])
52{
53  ARGBEGIN
54  {
55    default:
56      usage();
57  }
58  ARGEND;
59
60  recurse_dir(ARUU_LINUX_PATH_SYS_BUS_USB, lsusb);
61  return 0;
62}