is created with the access permissions specified by
and restricted by the
of the calling process.
The directory's owner ID is set to the process's effective user ID.
The directory's group ID is set to that of the parent directory in
which it is created.
A 0 return value indicates success.
A \-1 return value indicates an error, and an error code is stored in
will fail and no directory will be created if:
A component of the path prefix is not a directory.
A component of a pathname exceeded
characters, or an entire path name exceeded
A component of the path prefix does not exist.
Search permission is denied for a component of the path prefix.
Too many symbolic links were encountered in translating the pathname.
The named file resides on a read-only file system.
The named file exists.
The new directory cannot be created because there is no space left
on the file system that will contain the directory.
There are no free inodes on the file system on which the
directory is being created.
The new directory cannot be created because the user's
quota of disk blocks on the file system that will
contain the directory has been exhausted.
The user's quota of inodes on the file system on
which the directory is being created has been exhausted.
An I/O error occurred while making the directory entry or allocating the inode.
An I/O error occurred while reading from or writing to the file system.
points outside the process's allocated address space.