This manual page documents the GNU version of chmod. chmod changes the
file mode bits of each given file according to mode, which can be
either a symbolic representation of changes to make, or an octal number
representing the bit pattern for the new mode bits.
These system calls change the permissions of a file. They differ only
in how the file is specified:
* chmod() changes the permissions of the file specified whose pathname
is given in path, which is dereferenced if it is a symbolic link.