24 #include <sys/types.h>    27 #include <sys/ioctl.h>    35 "Usage: fioclient FIOC_FILE [size]\n"    37 "Get size if <size> is omitted, set size otherwise\n"    40 int main(
int argc, 
char **argv)
    46                 fprintf(stderr, 
"%s", usage);
    50         fd = open(argv[1], O_RDWR);
    57                 if (ioctl(fd, FIOC_GET_SIZE, &size)) {
    61                 printf(
"%zu\n", size);
    63                 size = strtoul(argv[2], NULL, 0);
    64                 if (ioctl(fd, FIOC_SET_SIZE, &size)) {