The chmod() function is used to set the permissions of a file system object.
On Windows the file protection mechanism is not at all POSIX-like, and the underlying chmod() function in the C library just sets or clears the FAT-style READONLY attribute. It does not touch any ACL. Software that needs to manage file permissions on Windows exactly should use the Win32 API.
See your C library manual for more details about chmod().
| zero if the operation succeeded, -1 on error. |