Linux下复位USB设备
有时候USB设备出错,这时我们希望通过软件复位一下USB设备,可以参考下面这段代码:
#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; }