57 lines
1.0 KiB
C
57 lines
1.0 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include "util.h"
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static void lsusb(const char *file);
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static void
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usage(void)
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{
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eprintf("usage: %s\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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ARGBEGIN {
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default:
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usage();
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} ARGEND;
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recurse("/sys/bus/usb/devices", lsusb);
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return EXIT_SUCCESS;
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}
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static void
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lsusb(const char *file)
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{
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FILE *fp;
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char *cwd;
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char path[PATH_MAX];
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char buf[BUFSIZ];
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unsigned int i = 0, busnum = 0, devnum = 0, pid = 0, vid = 0;
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cwd = agetcwd();
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snprintf(path, sizeof(path), "%s/%s/uevent", cwd, file);
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free(cwd);
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if (!(fp = fopen(path, "r")))
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return;
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while (fgets(buf, sizeof(buf), fp)) {
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if (sscanf(buf, "BUSNUM=%u\n", &busnum) ||
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sscanf(buf, "DEVNUM=%u\n", &devnum) ||
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sscanf(buf, "PRODUCT=%x/%x/", &pid, &vid))
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i++;
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if (i == 3) {
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printf("Bus %03d Device %03d: ID %04x:%04x\n", busnum, devnum,
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pid, vid);
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break;
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}
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}
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if (ferror(fp))
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eprintf("%s: read error:", path);
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fclose(fp);
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}
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