Can we lock file or folder in ubuntu by using open CV and C

Question

I want to create a project to lock file and folders in ubuntu by face detection through opencv using C language. Can you please let me know it is possible and how can i do it.

Answer 1

Can't help you with the opencv part, but "lock file and folders" could mean a few things:

• You want to change permissions of files so that a given user/group can/cannot access them. If this is the case, you want the chmod function. See man 2 chmod . Seems like this is probably what you're after?

• Usually, "file locking" on Linux refers to a means to prevent other processes from accessing a file without changing permissions via either:

  • Mandatory file locking via lockf (or fcntl ).
  • Advisory file locking via flock .

If file locking is what you're after, here are the "see also" documents referred to by the man pages on lockf and/or flock :

https://www.kernel.org/doc/Documentation/filesystems/mandatory-locking.txt https://www.kernel.org/doc/Documentation/filesystems/locks.txt

Note: Others have indicated you might want to use the C++ API for opencv . All of these functions should work just fine from C++ too.