btrfsctl.c

   1 #ifndef __CHECKER__
   2 #include <sys/ioctl.h>
   3 #include <sys/mount.h>
   4 #include "ioctl.h"
   5 #endif
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <fcntl.h>
  11 #include <unistd.h>
  12 #include "kerncompat.h"
  13
  14 #ifdef __CHECKER__
  15 #define BLKGETSIZE64 0
  16 #define BTRFS_IOC_SNAP_CREATE 0
  17 #define BTRFS_VOL_NAME_MAX 255
  18 struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
  19 static inline int ioctl(int fd, int define, void *arg) { return 0; }
  20 #endif
  21
  22 void print_usage(void)
  23 {
  24         printf("usage: btrfsctl [ -s snapshot_name ] dir\n");
  25         exit(1);
  26 }
  27
  28 int main(int ac, char **av)
  29 {
  30         char *fname;
  31         int fd;
  32         int ret;
  33         struct btrfs_ioctl_vol_args args;
  34         char *name;
  35         int i;
  36
  37         for (i = 1; i < ac - 1; i++) {
  38                 if (strcmp(av[i], "-s") == 0) {
  39                         if (i + 1 >= ac - 1) {
  40                                 fprintf(stderr, "-s requires an arg");
  41                                 print_usage();
  42                         }
  43                         name = av[i + 1];
  44                         if (strlen(name) >= BTRFS_VOL_NAME_MAX) {
  45                                 fprintf(stderr, "snapshot name is too long\n");
  46                                 exit(1);
  47                         }
  48                 }
  49         }
  50         fname = av[ac - 1];
  51 printf("fname is %s\n", fname);
  52         fd = open(fname, O_RDWR);
  53         if (fd < 0) {
  54                 perror("open");
  55                 exit(1);
  56         }
  57         strcpy(args.name, name);
  58         ret = ioctl(fd, BTRFS_IOC_SNAP_CREATE, &args);
  59         printf("ioctl returns %d\n", ret);
  60         return 0;
  61 }
  62