C:\>perldoc -f mkdir
mkdir Creates the directory specified by FILENAME, with permissions
specified by MASK (as modified by "umask"). If it succeeds it
returns true, otherwise it returns false and sets $! (errno). If
omitted, MASK defaults to 0777. If omitted, FILENAME defaults to
In general, it is better to create directories with permissive
MASK, and let the user modify that with their "umask", than it
is to supply a restrictive MASK and give the user no way to be
more permissive. The exceptions to this rule are when the file
or directory should be kept private (mail files, for instance).
The perlfunc(1) entry on "umask" discusses the choice of MASK in
Note that according to the POSIX 1003.1-1996 the FILENAME may
have any number of trailing slashes. Some operating and
filesystems do not get this right, so Perl automatically removes
all trailing slashes to keep everyone happy.
In order to recursively create a directory structure look at the
"mkpath" function of the File::Path module.