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@rogersguedes
Last active June 14, 2020 17:07
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Command line application to reset USB devices. Thanks to https://askubuntu.com/questions/645/how-do-you-reset-a-usb-device-from-the-command-line
/* usbreset -- send a USB port reset to a USB device */
/**
* usage `./usbreset /dev/bus/usb/<bus-number>/<device-number>`
* use `lsusb` to get <bus-number> and <device-number>.
*/
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <linux/usbdevice_fs.h>
int main(int argc, char **argv)
{
const char *filename;
int fd;
int rc;
if (argc != 2) {
fprintf(stderr, "Usage: usbreset device-filename\n");
return 1;
}
filename = argv[1];
fd = open(filename, O_WRONLY);
if (fd < 0) {
perror("Error opening output file");
return 1;
}
printf("Resetting USB device %s\n", filename);
rc = ioctl(fd, USBDEVFS_RESET, 0);
if (rc < 0) {
perror("Error in ioctl");
return 1;
}
printf("Reset successful\n");
close(fd);
return 0;
}
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