How to check whether a file is locked in Cocoa?

Question

Is there any API to check whether a file is a locked? I am not able to find any API in the NSFileManager class.Let me know if there is any API to check the lock of

Answer 1

If necessary, the immutable flag (OS X 'file locked') can also be determined with POSIX C functions. The immutable property is not a lock in unix terms but a file flag. It can be obtained with the stat function:

struct stat buf;
stat("my/file/path", &buf);
if (0 != (buf.st_flags & UF_IMMUTABLE)) {
     //is immutable
}

For reference see: https://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man2/stat.2.html

The immutable flag can be set with the chflags function:

chflags("my/file/path", UF_IMMUTABLE);

For reference see: https://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man2/chflags.2.html