Report case insensitivity in OSX (using OSXFuse)

Question

I created a case-insensitive file system in OSX (using OSXFuse). But when I tried to check the case insensitiveness of my volume, using NSURLVolumeSupportsCaseSensitiveNamesKey, it reported it as case sensitive. My question is, what do I need to do on OSX so that when I check the case sensitivity using NSURLVolumeSupportsCaseSensitiveNamesKey, it will correctly report my file system as case insensitive?

Bellow are more details on what I did:

This is how I used NSURLVolumeSupportsCaseSensitiveNamesKey to check for case insensitivity:

NSString *path = @"/Volumes/MyVolume";
NSURL *file_system = [NSURL fileURLWithPath:path isDirectory:YES];
NSNumber *case_sensitive_fs;
BOOL has_case_sensitive_resource = [file_system getResourceValue:&case_sensitive_fs
                                                          forKey:NSURLVolumeSupportsCaseSensitiveNamesKey
                                                           error:NULL];
if (!has_case_sensitive_resource) {
  LOG("Has no case sensitive resource");
} else {
  if ([case_sensitive_fs intValue] ==1) {
    LOG("This is case sensitive file system");
  } else {
    LOG("This is case insensitive file system");
  }
}

Note that when I used getattrlist, it correctly reported that my file system was case insensitive:

    typedef struct volume_capabilities_result {
      u_int32_t length;
      vol_capabilities_attr_t volume_capability;
    } VolumeCapabilitiesResult;
//...
    struct attrlist list = { 0 };
    list.bitmapcount = ATTR_BIT_MAP_COUNT;
    list.reserved = 0;
    list.volattr = ATTR_VOL_INFO | ATTR_VOL_CAPABILITIES;

    VolumeCapabilitiesResult volumeCapResult;
    int result = getattrlist("/Volumes/MyVolume", &list, &volumeCapResult, sizeof(volumeCapResult), 0);
    if (result != -1 &&
        (volumeCapResult.volume_capability.valid[VOL_CAPABILITIES_FORMAT] & VOL_CAP_FMT_CASE_SENSITIVE) != 0) {
      bool case_senstive = (volumeCapResult.volume_capability.capabilities[VOL_CAPABILITIES_FORMAT] &
                                    VOL_CAP_FMT_CASE_SENSITIVE) != 0;
      if (case_senstive) {
        LOG("getattrlist said we are case sensitive");
      } else {
        LOG("getattrlist said we are case insensitive");
      }
    }

I believe getattrlist reported it correctly because I used osxfuse to implement the fuse_operations.init as follow:

void fuse_init(void* user_data, struct fuse_conn_info* conn) {
  conn->want |= FUSE_CAP_CASE_INSENSITIVE;
}

Answer 1

Are you sure your path is correct in the first code snippet, i.e. the missing slash at the beginning?

NSString *path = @"Volumes/MyVolume";

Otherwise than that, this code seems to work for me.