mirror of
https://github.com/eddyem/eddys_snippets.git
synced 2025-12-06 10:45:12 +03:00
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <usb.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <linux/usbdevice_fs.h>
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#include <errno.h>
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#include <stdlib.h>
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#define ERR(...) fprintf(stderr, __VA_ARGS__)
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#define DBG(...)
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int main(int argc, char **argv){
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int pid, vid;
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int fd, rc;
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char buf[256], *d = NULL, *f = NULL, *eptr;
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struct usb_bus *bus;
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struct usb_device *dev;
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int found = 0;
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if(argc != 2 || !(d = strchr(argv[1], ':'))){
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printf("Usage: %s vid:pid\n", argv[0]);
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return 1;
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}
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vid = (int)strtol(argv[1], &eptr, 16);
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pid = (int)strtol(d+1, &eptr, 16);
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printf("pid: %x, vid: %x\n", pid, vid);
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d = NULL;
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usb_init();
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usb_find_busses();
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usb_find_devices();
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for(bus = usb_busses; bus && !found; bus = bus->next) {
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for(dev = bus->devices; dev && !found; dev = dev->next) {
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if (dev->descriptor.idVendor == vid && dev->descriptor.idProduct == pid){
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found = 1;
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d = bus->dirname;
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f = dev->filename;
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}
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}
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}
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if(!found){
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// "õÓÔÒÏÊÓÔ×Ï ÎÅ ÎÁÊÄÅÎÏ"
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ERR("Device not found");
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return 1;
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}
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snprintf(buf, 255, "/dev/bus/usb/%s/%s", d,f);
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fd = open(buf, O_WRONLY);
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if (fd < 0) {
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// "îÅ ÍÏÇÕ ÏÔËÒÙÔØ ÆÁÊÌ ÕÓÔÒÏÊÓÔ×Á %s: %s"
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ERR("Can't open device file %s: %s", buf, strerror(errno));
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return 1;
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}
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printf("Resetting USB device %s", buf);
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rc = ioctl(fd, USBDEVFS_RESET, 0);
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if (rc < 0) {
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// "îÅ ÍÏÇÕ ×ÙÚÙ×ÁÔØ ioctl"
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perror("Error in ioctl");
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return 1;
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}
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close(fd);
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return 0;
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}
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