Ensured various XPG7 stuff are declared properly in sys/stat.h (and cleanup)
New documentation for wcslen, wcsnlen, wcscasecmp (and friends), wcsdup.
Various other tweaks and markup improvements.
opendir, dirfd are in XPG7

*** 1,181 ****
! '\" te
  .\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved.
  .\" Portions Copyright (c) 1992, X/Open Company Limited.  All Rights Reserved.
  .\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at
  .\" http://www.opengroup.org/bookstore/.
  .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
  .\"  This notice shall appear on any product containing this material.
  .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
  .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
  .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
! .TH OPENDIR 3C "Jun 26, 2007"
! .SH NAME
! opendir, fdopendir \- open directory
! .SH SYNOPSIS
! .LP
! .nf
! #include <sys/types.h>
! #include <dirent.h>
! 
! \fBDIR *\fR\fBopendir\fR(\fBconst char *\fR\fIdirname\fR);
! .fi
! 
! .LP
! .nf
! \fBDIR *\fR\fBfdopendir\fR(\fBint\fR \fIfildes\fR);
! .fi
! 
! .SH DESCRIPTION
! .sp
! .LP
! The \fBopendir()\fR function opens a directory stream corresponding to the
! directory named by the \fIdirname\fR argument.
! .sp
! .LP
! The \fBfdopendir()\fR function opens a directory stream for the directory file
! descriptor \fIfildes\fR. The directory file descriptor should not be used or
  closed following a successful function call, as this might cause undefined
  results from future operations on the directory stream obtained from the call.
! Use \fBclosedir\fR(3C) to close a directory stream.
! .sp
! .LP
! The directory stream is positioned at the first entry. If the type \fBDIR\fR is
  implemented using a file descriptor, applications will only be able to open up
! to a total of {\fBOPEN_MAX\fR} files and directories. A successful call to any
! of the \fBexec\fR functions will close any directory streams that are open in
! the calling process.  See \fBexec\fR(2).
! .SH RETURN VALUES
! .sp
! .LP
! Upon successful completion, \fBopendir()\fR and \fBfdopendir()\fR return a
! pointer to an object of type \fBDIR\fR. Otherwise, a null pointer is returned
! and \fBerrno\fR is set to indicate the error.
! .SH ERRORS
! .sp
! .LP
! The \fBopendir()\fR function will fail if:
! .sp
! .ne 2
! .na
! \fB\fBEACCES\fR\fR
! .ad
! .RS 16n
  Search permission is denied for the component of the path prefix of
! \fIdirname\fR or read permission is denied for \fIdirname\fR.
! .RE
! 
! .sp
! .ne 2
! .na
! \fB\fBELOOP\fR\fR
! .ad
! .RS 16n
! Too many symbolic links were encountered in resolving \fIpath\fR.
! .RE
! 
! .sp
! .ne 2
! .na
! \fB\fBENAMETOOLONG\fR\fR
! .ad
! .RS 16n
! The length of the \fIdirname\fR argument exceeds {\fBPATH_MAX\fR}, or a path
! name component is longer than {\fBNAME_MAX\fR} while {\fB_POSIX_NO_TRUNC\fR} is
  in effect.
! .RE
! 
! .sp
! .ne 2
! .na
! \fB\fBENOENT\fR\fR
! .ad
! .RS 16n
! A component of \fIdirname\fR does not name an existing directory or
! \fIdirname\fR is an empty string.
! .RE
! 
! .sp
! .ne 2
! .na
! \fB\fBENOTDIR\fR\fR
! .ad
! .RS 16n
! A component of \fIdirname\fR is not a directory.
! .RE
! 
! .sp
! .LP
! The \fBfdopendir()\fR function will fail if:
! .sp
! .ne 2
! .na
! \fB\fBENOTDIR\fR\fR
! .ad
! .RS 11n
! The file descriptor \fIfildes\fR does not reference a directory.
! .RE
! 
! .sp
! .LP
! The \fBopendir()\fR function may fail if:
! .sp
! .ne 2
! .na
! \fB\fBEMFILE\fR\fR
! .ad
! .RS 16n
! There are {\fBOPEN_MAX\fR} file descriptors currently open in the calling
! process.
! .RE
! 
! .sp
! .ne 2
! .na
! \fB\fBENAMETOOLONG\fR\fR
! .ad
! .RS 16n
  Pathname resolution of a symbolic link produced an intermediate result whose
! length exceeds \fBPATH_MAX\fR.
! .RE
! 
! .sp
! .ne 2
! .na
! \fB\fBENFILE\fR\fR
! .ad
! .RS 16n
  Too many files are currently open on the system.
! .RE
! 
! .SH USAGE
! .sp
! .LP
! The \fBopendir()\fR and \fBfdopendir()\fR functions should be used in
! conjunction with \fBreaddir\fR(3C), \fBclosedir\fR(3C) and \fBrewinddir\fR(3C)
! to examine the contents of the directory (see the \fBEXAMPLES\fR section in
! \fBreaddir\fR(3C)). This method is recommended for portability.
! .SH ATTRIBUTES
! .sp
! .LP
! See \fBattributes\fR(5) for descriptions of the following attributes:
! .sp
! 
! .sp
! .TS
! box;
! c | c
! l | l .
! ATTRIBUTE TYPE  ATTRIBUTE VALUE
! _
! Interface Stability     T{
! \fBopendir()\fR is Standard; \fBfdopendir()\fR is Evolving
! T}
! _
! MT-Level        Safe
! .TE
! 
! .SH SEE ALSO
! .sp
! .LP
! \fBlstat\fR(2), \fBsymlink\fR(2), \fBclosedir\fR(3C), \fBreaddir\fR(3C),
! \fBrewinddir\fR(3C), \fBscandir\fR(3C), \fBattributes\fR(5)
--- 1,170 ----
! .\" Copyright 2014 Garrett D'Amore <garrett@damore.org>
  .\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved.
  .\" Portions Copyright (c) 1992, X/Open Company Limited.  All Rights Reserved.
  .\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at
  .\" http://www.opengroup.org/bookstore/.
  .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
  .\"  This notice shall appear on any product containing this material.
  .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
  .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
  .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
! .Dd "Jul 22, 2014"
! .Dt OPENDIR 3C
! .Os
! .Sh NAME
! .Nm opendir ,
! .Nm fdopendir
! .Nd open directory
! .Sh SYNOPSIS
! .In dirent.h
! .
! .Ft "DIR *"
! .Fn opendir "const char *dirname"
! .
! .Ft "DIR *"
! .Fn fdopendir "int fildes"
! .
! .Sh DESCRIPTION
! The
! .Fn opendir
! function opens a directory stream corresponding to the
! directory named by the
! .Fa dirname
! argument.
! .Lp
! The
! .Fn fdopendir
! function opens a directory stream for the directory file
! descriptor
! .Fa fildes .
! The directory file descriptor should not be used or
  closed following a successful function call, as this might cause undefined
  results from future operations on the directory stream obtained from the call.
! Use
! .Xr closedir 3C
! to close a directory stream.
! .Lp
! The directory stream is positioned at the first entry. If the type
! .Ft DIR
! is
  implemented using a file descriptor, applications will only be able to open up
! to a total of
! .Bq OPEN_MAX
! files and directories. A successful call to any
! of the
! .Xr exec 2
! functions will close any directory streams that are open in
! the calling process.
! .Sh RETURN VALUES
! Upon successful completion,
! .Fn opendir
! and
! .Fn fdopendir
! return a
! pointer to an object of type
! .Ft DIR .
! Otherwise, a null pointer is returned
! and
! .Va errno
! is set to indicate the error.
! .Sh ERRORS
! The
! .Fn opendir
! function will fail if:
! .Bl -tag -width Er
! .It Er EACCES
  Search permission is denied for the component of the path prefix of
! .Fa dirname
! or read permission is denied for
! .Fa dirname .
! .It Er ELOOP
! Too many symbolic links were encountered in resolving
! .Fa path .
! .It Er ENAMETOOLONG
! The length of the
! .Fa dirname
! argument exceeds
! .Brq PATH_MAX ,
! or a path name component is longer than
! .Brq NAME_MAX
! while
! .Brq _POSIX_NO_TRUNC
! is
  in effect.
! .It Er ENOENT
! A component of
! .Fa dirname
! does not name an existing directory or
! .Fa dirname
! is an empty string.
! .It Er ENOTDIR
! A component of
! .Fa dirname
! is not a directory.
! .El
! .Lp
! The
! .Fn fdopendir
! function will fail if:
! .Bl -tag -width Er
! .It Er ENOTDIR
! The file descriptor
! .Fa fildes
! does not reference a directory.
! .El
! .Lp
! The
! .Fn opendir
! function may fail if:
! .Bl -tag -width Er
! .It Er EMFILE
! There are
! .Brq OPEN_MAX
! file descriptors currently open in the calling process.
! .It Er ENAMETOOLONG
  Pathname resolution of a symbolic link produced an intermediate result whose
! length exceeds
! .Brq PATH_MAX .
! .It Er ENFILE
  Too many files are currently open on the system.
! .El
! .Sh USAGE
! The
! .Fn opendir
! and
! .Fn fdopendir
! functions should be used in conjunction with
! .Xr readdir 3C ,
! .Xr closedir 3C
! and
! .Xr rewinddir 3C
! to examine the contents of the directory
! .Po see the
! .Sx EXAMPLES
! section in
! .Xr readdir 3C Pc .
! This method is recommended for portability.
! .Sh INTERFACE STABILITY
! .Sy Standard .
! .Sh MT-LEVEL
! .Sy Safe .
! .Sh SEE ALSO
! .Xr exec 2 ,
! .Xr lstat 2 ,
! .Xr symlink 2 ,
! .Xr closedir 3C ,
! .Xr readdir 3C ,
! .Xr rewinddir 3C ,
! .Xr scandir 3C ,
! .Xr standards 5
! .Sh STANDARDS
! The
! .Fn opendir
! function was introduced in
! .Bx 4.2 .
! and standardized in
! .St -p1003.1 .
! The
! .Fn fdopendir
! function was introduced in
! .St -p1003.1-2008 .