int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    struct statfs fsInfo;

    NSLog(@"Testing %s", argv[1]);
    if (statfs(argv[1],  &fsInfo) == -1) {
        NSLog(@"Error %s", argv[1]);
        exit(1);
    }

    if (fsInfo.f_flags & MNT_RDONLY) {
        NSLog(@"Read only %s", argv[1]);
        exit(0);
    }

    NSLog(@"Type %s", fsInfo.f_fstypename);

    [pool release];
    return 0;
}

http://www.cocoabuilder.com/archive/message/cocoa/2006/5/18/163842

This can be used to test FS type.

Filesystem - Testing FS Type

osx, log

Objective C