#include "common.h"#include "string.h"#include <sys/stat.h>#include <fcntl.h>#include <errno.h>static void usage(void) {  printf("Usage: thumb -i <fileid/trackid> <imagefile>\n");  exit(0);}int main (int argc, char **argv) {  int opt;  extern int optind;  extern char *optarg;  LIBMTP_mtpdevice_t *device = NULL;  int fd;  uint32_t id = 0;  uint64_t filesize;  uint8_t *imagedata = NULL;  char *path = NULL;  struct stat statbuff;  int ret;  while ( (opt = getopt(argc, argv, "hi:")) != -1 ) {    switch (opt) {    case 'h':      usage();    case 'i':      id = atoi(strdup(optarg));      break;    default:      usage();    }  }  argc -= optind;  argv += optind;  if ( argc != 1 ) {    printf("You need to pass a filename.\n");    usage();  }  path = argv[0];  if ( stat(path, &statbuff) == -1 ) {    fprintf(stderr, "%s: ", path);    perror("stat");    exit(1);  }  filesize = (uint64_t) statbuff.st_size;  imagedata = malloc(filesize * sizeof(uint16_t));#ifdef __WIN32__  if ( (fd = open(path, O_RDONLY|O_BINARY) == -1 ) {#else  if ( (fd = open(path, O_RDONLY)) == -1) {#endif    printf("Couldn't open image file %s (%s)\n",path,strerror(errno));    return 1;  }  else {    read(fd, imagedata, filesize);    close(fd);  }  LIBMTP_Init();  device = LIBMTP_Get_First_Device();  if (device == NULL) {    printf("No devices.\n");    return 0;  }    LIBMTP_filesampledata_t *thumb = LIBMTP_new_filesampledata_t();  int i;  thumb->data = malloc(sizeof(uint16_t) * filesize);  for (i = 0; i < filesize; i++) {    thumb->data[i] = imagedata[i];  }  thumb->size = filesize;  thumb->filetype = LIBMTP_FILETYPE_JPEG;    ret = LIBMTP_Send_Representative_Sample(device,id,thumb);  if (ret != 0) {    printf("Couldn't send thumbnail\n");  }  free(imagedata);  LIBMTP_destroy_filesampledata_t(thumb);  LIBMTP_Release_Device(device);  printf("OK.\n");  return 0;}