Merge pull request #4 from csabella/8.6.8-tcl

Import Tcl-code 8.6.8

README

@@ -1,115 +1,185 @@
-ZLIB DATA COMPRESSION LIBRARY
+README:  Tcl
+    This is the Tcl 8.6.8 source distribution.
+	http://sourceforge.net/projects/tcl/files/Tcl/
+    You can get any source release of Tcl from the URL above.
 
-zlib 1.2.11 is a general purpose data compression library.  All the code is
-thread safe.  The data format used by the zlib library is described by RFCs
-(Request for Comments) 1950 to 1952 in the files
-http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and
-rfc1952 (gzip format).
+Contents
+--------
+    1. Introduction
+    2. Documentation
+    3. Compiling and installing Tcl
+    4. Development tools
+    5. Tcl newsgroup
+    6. The Tcler's Wiki
+    7. Mailing lists
+    8. Support and Training
+    9. Tracking Development
+    10. Thank You
 
-All functions of the compression library are documented in the file zlib.h
-(volunteer to write man pages welcome, contact zlib@gzip.org).  A usage example
-of the library is given in the file test/example.c which also tests that
-the library is working correctly.  Another example is given in the file
-test/minigzip.c.  The compression library itself is composed of all source
-files in the root directory.
+1. Introduction
+---------------
+Tcl provides a powerful platform for creating integration applications that
+tie together diverse applications, protocols, devices, and frameworks.
+When paired with the Tk toolkit, Tcl provides the fastest and most powerful
+way to create GUI applications that run on PCs, Unix, and Mac OS X.
+Tcl can also be used for a variety of web-related tasks and for creating
+powerful command languages for applications.
 
-To compile all files and run the test program, follow the instructions given at
-the top of Makefile.in.  In short "./configure; make test", and if that goes
-well, "make install" should work for most flavors of Unix.  For Windows, use
-one of the special makefiles in win32/ or contrib/vstudio/ .  For VMS, use
-make_vms.com.
+Tcl is maintained, enhanced, and distributed freely by the Tcl community.
+Source code development and tracking of bug reports and feature requests
+takes place at:
 
-Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
-<info@winimage.com> for the Windows DLL version.  The zlib home page is
-http://zlib.net/ .  Before reporting a problem, please check this site to
-verify that you have the latest version of zlib; otherwise get the latest
-version and check whether the problem still exists or not.
+	http://core.tcl.tk/
 
-PLEASE read the zlib FAQ http://zlib.net/zlib_faq.html before asking for help.
+Tcl/Tk release and mailing list services are hosted by SourceForge:
 
-Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan.  1997
-issue of Dr.  Dobb's Journal; a copy of the article is available at
-http://marknelson.us/1997/01/01/zlib-engine/ .
+	http://sourceforge.net/projects/tcl/
 
-The changes made in version 1.2.11 are documented in the file ChangeLog.
+with the Tcl Developer Xchange hosted at:
 
-Unsupported third party contributions are provided in directory contrib/ .
+	http://www.tcl.tk/
 
-zlib is available in Java using the java.util.zip package, documented at
-http://java.sun.com/developer/technicalArticles/Programming/compression/ .
+Tcl is a freely available open source package.  You can do virtually
+anything you like with it, such as modifying it, redistributing it,
+and selling it either in whole or in part.  See the file
+"license.terms" for complete information.
 
-A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is available
-at CPAN (Comprehensive Perl Archive Network) sites, including
-http://search.cpan.org/~pmqs/IO-Compress-Zlib/ .
+2. Documentation
+----------------
 
-A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
-available in Python 1.5 and later versions, see
-http://docs.python.org/library/zlib.html .
+Extensive documentation is available at our website.
+The home page for this release, including new features, is
+	http://www.tcl.tk/software/tcltk/8.6.html
 
-zlib is built into tcl: http://wiki.tcl.tk/4610 .
+Detailed release notes can be found at the file distributions page
+by clicking on the relevant version.
+	http://sourceforge.net/projects/tcl/files/Tcl/
 
-An experimental package to read and write files in .zip format, written on top
-of zlib by Gilles Vollant <info@winimage.com>, is available in the
-contrib/minizip directory of zlib.
+Information about Tcl itself can be found at
+	http://www.tcl.tk/about/
 
+There have been many Tcl books on the market.  Many are mentioned in the Wiki:
+	http://wiki.tcl.tk/_/ref?N=25206
 
-Notes for some targets:
+To view the complete set of reference manual entries for Tcl 8.6 online,
+visit the URL:
+	http://www.tcl.tk/man/tcl8.6/
 
-- For Windows DLL versions, please see win32/DLL_FAQ.txt
+2a. Unix Documentation
+----------------------
 
-- For 64-bit Irix, deflate.c must be compiled without any optimization. With
-  -O, one libpng test fails. The test works in 32 bit mode (with the -n32
-  compiler flag). The compiler bug has been reported to SGI.
+The "doc" subdirectory in this release contains a complete set of
+reference manual entries for Tcl.  Files with extension ".1" are for
+programs (for example, tclsh.1); files with extension ".3" are for C
+library procedures; and files with extension ".n" describe Tcl
+commands.  The file "doc/Tcl.n" gives a quick summary of the Tcl
+language syntax.  To print any of the man pages on Unix, cd to the
+"doc" directory and invoke your favorite variant of troff using the
+normal -man macros, for example
 
-- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works
-  when compiled with cc.
+		ditroff -man Tcl.n
 
-- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is
-  necessary to get gzprintf working correctly. This is done by configure.
+to print Tcl.n.  If Tcl has been installed correctly and your "man" program
+supports it, you should be able to access the Tcl manual entries using the
+normal "man" mechanisms, such as
 
-- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
-  other compilers. Use "make test" to check your compiler.
+		man Tcl
 
-- gzdopen is not supported on RISCOS or BEOS.
+2b. Windows Documentation
+-------------------------
 
-- For PalmOs, see http://palmzlib.sourceforge.net/
+The "doc" subdirectory in this release contains a complete set of Windows
+help files for Tcl.  Once you install this Tcl release, a shortcut to the
+Windows help Tcl documentation will appear in the "Start" menu:
 
+	Start | Programs | Tcl | Tcl Help
 
-Acknowledgments:
+3. Compiling and installing Tcl
+-------------------------------
 
-  The deflate format used by zlib was defined by Phil Katz.  The deflate and
-  zlib specifications were written by L.  Peter Deutsch.  Thanks to all the
-  people who reported problems and suggested various improvements in zlib; they
-  are too numerous to cite here.
+There are brief notes in the unix/README, win/README, and macosx/README about
+compiling on these different platforms.  There is additional information
+about building Tcl from sources at
 
-Copyright notice:
+	http://www.tcl.tk/doc/howto/compile.html
 
- (C) 1995-2017 Jean-loup Gailly and Mark Adler
+4. Development tools
+---------------------------
 
-  This software is provided 'as-is', without any express or implied
-  warranty.  In no event will the authors be held liable for any damages
-  arising from the use of this software.
+ActiveState produces a high quality set of commercial quality development
+tools that is available to accelerate your Tcl application development.
+Tcl Dev Kit builds on the earlier TclPro toolset and provides a debugger,
+static code checker, single-file wrapping utility, bytecode compiler and
+more.  More information can be found at
 
-  Permission is granted to anyone to use this software for any purpose,
-  including commercial applications, and to alter it and redistribute it
-  freely, subject to the following restrictions:
+	http://www.ActiveState.com/Tcl
 
-  1. The origin of this software must not be misrepresented; you must not
-     claim that you wrote the original software. If you use this software
-     in a product, an acknowledgment in the product documentation would be
-     appreciated but is not required.
-  2. Altered source versions must be plainly marked as such, and must not be
-     misrepresented as being the original software.
-  3. This notice may not be removed or altered from any source distribution.
+5. Tcl newsgroup
+----------------
 
-  Jean-loup Gailly        Mark Adler
-  jloup@gzip.org          madler@alumni.caltech.edu
+There is a USENET news group, "comp.lang.tcl", intended for the exchange of
+information about Tcl, Tk, and related applications.  The newsgroup is a
+great place to ask general information questions.  For bug reports, please
+see the "Support and bug fixes" section below.
 
-If you use the zlib library in a product, we would appreciate *not* receiving
-lengthy legal documents to sign.  The sources are provided for free but without
-warranty of any kind.  The library has been entirely written by Jean-loup
-Gailly and Mark Adler; it does not include third-party code.
+6. Tcl'ers Wiki
+---------------
 
-If you redistribute modified sources, we would appreciate that you include in
-the file ChangeLog history information documenting your changes.  Please read
-the FAQ for more information on the distribution of modified source versions.
+A Wiki-based open community site covering all aspects of Tcl/Tk is at:
+
+	http://wiki.tcl.tk/
+
+It is dedicated to the Tcl programming language and its extensions.  A
+wealth of useful information can be found there.  It contains code
+snippets, references to papers, books, and FAQs, as well as pointers to
+development tools, extensions, and applications.  You can also recommend
+additional URLs by editing the wiki yourself.
+
+7. Mailing lists
+----------------
+
+Several mailing lists are hosted at SourceForge to discuss development or
+use issues (like Macintosh and Windows topics).  For more information and
+to subscribe, visit:
+
+	http://sourceforge.net/projects/tcl/
+
+and go to the Mailing Lists page.
+
+8. Support and Training
+------------------------
+
+We are very interested in receiving bug reports, patches, and suggestions
+for improvements.  We prefer that you send this information to us as
+tickets entered into our tracker at:
+
+	http://core.tcl.tk/tcl/reportlist
+
+We will log and follow-up on each bug, although we cannot promise a
+specific turn-around time.  Enhancements may take longer and may not happen
+at all unless there is widespread support for them (we're trying to
+slow the rate at which Tcl/Tk turns into a kitchen sink).  It's very
+difficult to make incompatible changes to Tcl/Tk at this point, due to
+the size of the installed base.
+
+The Tcl community is too large for us to provide much individual support
+for users.  If you need help we suggest that you post questions to
+comp.lang.tcl.  We read the newsgroup and will attempt to answer esoteric
+questions for which no one else is likely to know the answer.  In addition,
+see the following Web site for links to other organizations that offer
+Tcl/Tk training:
+
+	http://wiki.tcl.tk/training
+
+9. Tracking Development
+-----------------------
+
+Tcl is developed in public.  To keep an eye on how Tcl is changing, see
+	http://core.tcl.tk/
+
+10. Thank You
+-------------
+
+We'd like to express our thanks to the Tcl community for all the
+helpful suggestions, bug reports, and patches we have received.
+Tcl/Tk has improved vastly and will continue to do so with your help.

README.md

@@ -0,0 +1,2 @@
+# cpython-source-deps
+Source for packages that the cpython build process depends on

compat/README

@@ -0,0 +1,6 @@
+This directory contains various header and code files that are
+used make Tcl compatible with various releases of UNIX and UNIX-like
+systems.  Typically, files from this directory are used to compile
+Tcl when a system doesn't contain the corresponding files or when
+they are known to be incorrect.  When the whole world becomes POSIX-
+compliant this directory should be unnecessary.

compat/dirent.h

@@ -0,0 +1,21 @@
+/*
+ * dirent.h --
+ *
+ *	This file is a replacement for <dirent.h> in systems that
+ *	support the old BSD-style <sys/dir.h> with a "struct direct".
+ *
+ * Copyright (c) 1991 The Regents of the University of California.
+ * Copyright (c) 1994 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifndef _DIRENT
+#define _DIRENT
+
+#include <sys/dir.h>
+
+#define dirent direct
+
+#endif /* _DIRENT */

compat/dirent2.h

@@ -0,0 +1,53 @@
+/*
+ * dirent.h --
+ *
+ *	Declarations of a library of directory-reading procedures
+ *	in the POSIX style ("struct dirent").
+ *
+ * Copyright (c) 1991 The Regents of the University of California.
+ * Copyright (c) 1994 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifndef _DIRENT
+#define _DIRENT
+
+/*
+ * Dirent structure, which holds information about a single
+ * directory entry.
+ */
+
+#define MAXNAMLEN 255
+#define DIRBLKSIZ 512
+
+struct dirent {
+    long d_ino;			/* Inode number of entry */
+    short d_reclen;		/* Length of this record */
+    short d_namlen;		/* Length of string in d_name */
+    char d_name[MAXNAMLEN + 1];	/* Name must be no longer than this */
+};
+
+/*
+ * State that keeps track of the reading of a directory (clients
+ * should never look inside this structure;  the fields should
+ * only be accessed by the library procedures).
+ */
+
+typedef struct _dirdesc {
+    int dd_fd;
+    long dd_loc;
+    long dd_size;
+    char dd_buf[DIRBLKSIZ];
+} DIR;
+
+/*
+ * Procedures defined for reading directories:
+ */
+
+extern void		closedir (DIR *dirp);
+extern DIR *		opendir (char *name);
+extern struct dirent *	readdir (DIR *dirp);
+
+#endif /* _DIRENT */

compat/dlfcn.h

@@ -0,0 +1,58 @@
+/*
+ * dlfcn.h --
+ *
+ *	This file provides a replacement for the header file "dlfcn.h"
+ *	on systems where dlfcn.h is missing.  It's primary use is for
+ *	AIX, where Tcl emulates the dl library.
+ *
+ *	This file is subject to the following copyright notice, which is
+ *	different from the notice used elsewhere in Tcl but rougly
+ *	equivalent in meaning.
+ *
+ *	Copyright (c) 1992,1993,1995,1996, Jens-Uwe Mager, Helios Software GmbH
+ *	Not derived from licensed software.
+ *
+ *	Permission is granted to freely use, copy, modify, and redistribute
+ *	this software, provided that the author is not construed to be liable
+ *	for any results of using the software, alterations are clearly marked
+ *	as such, and this notice is not modified.
+ */
+
+/*
+ * This is an unpublished work copyright (c) 1992 HELIOS Software GmbH
+ * 30159 Hannover, Germany
+ */
+
+#ifndef __dlfcn_h__
+#define __dlfcn_h__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Mode flags for the dlopen routine.
+ */
+#define RTLD_LAZY	1	/* lazy function call binding */
+#define RTLD_NOW	2	/* immediate function call binding */
+#define RTLD_GLOBAL	0x100	/* allow symbols to be global */
+
+/*
+ * To be able to intialize, a library may provide a dl_info structure
+ * that contains functions to be called to initialize and terminate.
+ */
+struct dl_info {
+	void (*init) (void);
+	void (*fini) (void);
+};
+
+void *dlopen (const char *path, int mode);
+void *dlsym (void *handle, const char *symbol);
+char *dlerror (void);
+int dlclose (void *handle);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __dlfcn_h__ */

compat/fake-rfc2553.c

@@ -0,0 +1,266 @@
+/*
+ * Copyright (C) 2000-2003 Damien Miller.  All rights reserved.
+ * Copyright (C) 1999 WIDE Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Pseudo-implementation of RFC2553 name / address resolution functions
+ *
+ * But these functions are not implemented correctly. The minimum subset
+ * is implemented for ssh use only. For example, this routine assumes
+ * that ai_family is AF_INET. Don't use it for another purpose.
+ */
+#include "tclInt.h"
+
+TCL_DECLARE_MUTEX(netdbMutex)
+
+#ifndef HAVE_GETNAMEINFO
+#ifndef HAVE_STRLCPY
+static size_t
+strlcpy(char *dst, const char *src, size_t siz)
+{
+        char *d = dst;
+        const char *s = src;
+        size_t n = siz;
+
+        /* Copy as many bytes as will fit */
+        if (n != 0 && --n != 0) {
+                do {
+                        if ((*d++ = *s++) == 0)
+                                break;
+                } while (--n != 0);
+        }
+
+        /* Not enough room in dst, add NUL and traverse rest of src */
+        if (n == 0) {
+                if (siz != 0)
+                        *d = '\0';              /* NUL-terminate dst */
+                while (*s++)
+                        ;
+        }
+
+        return(s - src - 1);    /* count does not include NUL */
+}
+#endif
+
+int fake_getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
+                size_t hostlen, char *serv, size_t servlen, int flags)
+{
+	struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+	struct hostent *hp;
+	char tmpserv[16];
+
+	if (sa->sa_family != AF_UNSPEC && sa->sa_family != AF_INET)
+		return (EAI_FAMILY);
+	if (serv != NULL) {
+		snprintf(tmpserv, sizeof(tmpserv), "%d", ntohs(sin->sin_port));
+		if (strlcpy(serv, tmpserv, servlen) >= servlen)
+			return (EAI_MEMORY);
+	}
+
+	if (host != NULL) {
+		if (flags & NI_NUMERICHOST) {
+			size_t len;
+			Tcl_MutexLock(&netdbMutex);
+			len = strlcpy(host, inet_ntoa(sin->sin_addr), hostlen);
+			Tcl_MutexUnlock(&netdbMutex);
+			if (len >= hostlen) {
+				return (EAI_MEMORY);
+			} else {
+				return (0);
+			}
+		} else {
+			int ret;
+			Tcl_MutexLock(&netdbMutex);
+			hp = gethostbyaddr((char *)&sin->sin_addr,
+			    sizeof(struct in_addr), AF_INET);
+			if (hp == NULL) {
+				ret = EAI_NODATA;
+			} else if (strlcpy(host, hp->h_name, hostlen)
+				   >= hostlen) {
+				ret = EAI_MEMORY;
+			} else {
+				ret = 0;
+			}
+			Tcl_MutexUnlock(&netdbMutex);
+			return ret;
+		}
+	}
+	return (0);
+}
+#endif /* !HAVE_GETNAMEINFO */
+
+#ifndef HAVE_GAI_STRERROR
+const char *
+fake_gai_strerror(int err)
+{
+	switch (err) {
+	case EAI_NODATA:
+		return ("no address associated with name");
+	case EAI_MEMORY:
+		return ("memory allocation failure.");
+	case EAI_NONAME:
+		return ("nodename nor servname provided, or not known");
+	case EAI_FAMILY:
+		return ("ai_family not supported");
+	default:
+		return ("unknown/invalid error.");
+	}
+}
+#endif /* !HAVE_GAI_STRERROR */
+
+#ifndef HAVE_FREEADDRINFO
+void
+fake_freeaddrinfo(struct addrinfo *ai)
+{
+	struct addrinfo *next;
+
+	for(; ai != NULL;) {
+		next = ai->ai_next;
+		free(ai);
+		ai = next;
+	}
+}
+#endif /* !HAVE_FREEADDRINFO */
+
+#ifndef HAVE_GETADDRINFO
+static struct
+addrinfo *malloc_ai(int port, u_long addr, const struct addrinfo *hints)
+{
+	struct addrinfo *ai;
+
+	ai = malloc(sizeof(*ai) + sizeof(struct sockaddr_in));
+	if (ai == NULL)
+		return (NULL);
+
+	memset(ai, '\0', sizeof(*ai) + sizeof(struct sockaddr_in));
+
+	ai->ai_addr = (struct sockaddr *)(ai + 1);
+	/* XXX -- ssh doesn't use sa_len */
+	ai->ai_addrlen = sizeof(struct sockaddr_in);
+	ai->ai_addr->sa_family = ai->ai_family = AF_INET;
+
+	((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
+	((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
+
+	/* XXX: the following is not generally correct, but does what we want */
+	if (hints->ai_socktype)
+		ai->ai_socktype = hints->ai_socktype;
+	else
+		ai->ai_socktype = SOCK_STREAM;
+
+	if (hints->ai_protocol)
+		ai->ai_protocol = hints->ai_protocol;
+
+	return (ai);
+}
+
+int
+fake_getaddrinfo(const char *hostname, const char *servname,
+    const struct addrinfo *hints, struct addrinfo **res)
+{
+	struct hostent *hp;
+	struct servent *sp;
+	struct in_addr in;
+	int i;
+	long int port;
+	u_long addr;
+
+	port = 0;
+	if (hints && hints->ai_family != AF_UNSPEC &&
+	    hints->ai_family != AF_INET)
+		return (EAI_FAMILY);
+	if (servname != NULL) {
+		char *cp;
+
+		port = strtol(servname, &cp, 10);
+		if (port > 0 && port <= 65535 && *cp == '\0')
+			port = htons((unsigned short)port);
+		else if ((sp = getservbyname(servname, NULL)) != NULL)
+			port = sp->s_port;
+		else
+			port = 0;
+	}
+
+	if (hints && hints->ai_flags & AI_PASSIVE) {
+		addr = htonl(0x00000000);
+		if (hostname && inet_aton(hostname, &in) != 0)
+			addr = in.s_addr;
+		*res = malloc_ai(port, addr, hints);
+		if (*res == NULL)
+			return (EAI_MEMORY);
+		return (0);
+	}
+
+	if (!hostname) {
+		*res = malloc_ai(port, htonl(0x7f000001), hints);
+		if (*res == NULL)
+			return (EAI_MEMORY);
+		return (0);
+	}
+
+	if (inet_aton(hostname, &in)) {
+		*res = malloc_ai(port, in.s_addr, hints);
+		if (*res == NULL)
+			return (EAI_MEMORY);
+		return (0);
+	}
+
+	/* Don't try DNS if AI_NUMERICHOST is set */
+	if (hints && hints->ai_flags & AI_NUMERICHOST)
+		return (EAI_NONAME);
+
+	Tcl_MutexLock(&netdbMutex);
+	hp = gethostbyname(hostname);
+	if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
+		struct addrinfo *cur, *prev;
+
+		cur = prev = *res = NULL;
+		for (i = 0; hp->h_addr_list[i]; i++) {
+			struct in_addr *in = (struct in_addr *)hp->h_addr_list[i];
+
+			cur = malloc_ai(port, in->s_addr, hints);
+			if (cur == NULL) {
+				if (*res != NULL)
+					freeaddrinfo(*res);
+				Tcl_MutexUnlock(&netdbMutex);
+				return (EAI_MEMORY);
+			}
+			if (prev)
+				prev->ai_next = cur;
+			else
+				*res = cur;
+
+			prev = cur;
+		}
+		Tcl_MutexUnlock(&netdbMutex);
+		return (0);
+	}
+	Tcl_MutexUnlock(&netdbMutex);
+	return (EAI_NODATA);
+}
+#endif /* !HAVE_GETADDRINFO */

compat/fake-rfc2553.h

@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2000-2003 Damien Miller.  All rights reserved.
+ * Copyright (C) 1999 WIDE Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Pseudo-implementation of RFC2553 name / address resolution functions
+ *
+ * But these functions are not implemented correctly. The minimum subset
+ * is implemented for ssh use only. For example, this routine assumes
+ * that ai_family is AF_INET. Don't use it for another purpose.
+ */
+
+#ifndef _FAKE_RFC2553_H
+#define _FAKE_RFC2553_H
+
+/*
+ * First, socket and INET6 related definitions
+ */
+#ifndef HAVE_STRUCT_SOCKADDR_STORAGE
+# define	_SS_MAXSIZE	128	/* Implementation specific max size */
+# define       _SS_PADSIZE     (_SS_MAXSIZE - sizeof (struct sockaddr))
+struct sockaddr_storage {
+	struct sockaddr	ss_sa;
+	char		__ss_pad2[_SS_PADSIZE];
+};
+# define ss_family ss_sa.sa_family
+#endif /* !HAVE_STRUCT_SOCKADDR_STORAGE */
+
+#ifndef IN6_IS_ADDR_LOOPBACK
+# define IN6_IS_ADDR_LOOPBACK(a) \
+	(((uint32_t *)(a))[0] == 0 && ((uint32_t *)(a))[1] == 0 && \
+	 ((uint32_t *)(a))[2] == 0 && ((uint32_t *)(a))[3] == htonl(1))
+#endif /* !IN6_IS_ADDR_LOOPBACK */
+
+#ifndef HAVE_STRUCT_IN6_ADDR
+struct in6_addr {
+	uint8_t	s6_addr[16];
+};
+#endif /* !HAVE_STRUCT_IN6_ADDR */
+
+#ifndef HAVE_STRUCT_SOCKADDR_IN6
+struct sockaddr_in6 {
+	unsigned short	sin6_family;
+	uint16_t	sin6_port;
+	uint32_t	sin6_flowinfo;
+	struct in6_addr	sin6_addr;
+	uint32_t	sin6_scope_id;
+};
+#endif /* !HAVE_STRUCT_SOCKADDR_IN6 */
+
+#ifndef AF_INET6
+/* Define it to something that should never appear */
+#define AF_INET6 AF_MAX
+#endif
+
+/*
+ * Next, RFC2553 name / address resolution API
+ */
+
+#ifndef NI_NUMERICHOST
+# define NI_NUMERICHOST    (1)
+#endif
+#ifndef NI_NAMEREQD
+# define NI_NAMEREQD       (1<<1)
+#endif
+#ifndef NI_NUMERICSERV
+# define NI_NUMERICSERV    (1<<2)
+#endif
+
+#ifndef AI_PASSIVE
+# define AI_PASSIVE		(1)
+#endif
+#ifndef AI_CANONNAME
+# define AI_CANONNAME		(1<<1)
+#endif
+#ifndef AI_NUMERICHOST
+# define AI_NUMERICHOST		(1<<2)
+#endif
+
+#ifndef NI_MAXSERV
+# define NI_MAXSERV 32
+#endif /* !NI_MAXSERV */
+#ifndef NI_MAXHOST
+# define NI_MAXHOST 1025
+#endif /* !NI_MAXHOST */
+
+#ifndef EAI_NODATA
+# define EAI_NODATA	(INT_MAX - 1)
+#endif
+#ifndef EAI_MEMORY
+# define EAI_MEMORY	(INT_MAX - 2)
+#endif
+#ifndef EAI_NONAME
+# define EAI_NONAME	(INT_MAX - 3)
+#endif
+#ifndef EAI_SYSTEM
+# define EAI_SYSTEM	(INT_MAX - 4)
+#endif
+#ifndef EAI_FAMILY
+# define EAI_FAMILY	(INT_MAX - 5)
+#endif
+#ifndef EAI_SERVICE
+# define EAI_SERVICE      -8    /* SERVICE not supported for `ai_socktype'.  */
+#endif
+
+#ifndef HAVE_STRUCT_ADDRINFO
+struct addrinfo {
+	int	ai_flags;	/* AI_PASSIVE, AI_CANONNAME */
+	int	ai_family;	/* PF_xxx */
+	int	ai_socktype;	/* SOCK_xxx */
+	int	ai_protocol;	/* 0 or IPPROTO_xxx for IPv4 and IPv6 */
+	size_t	ai_addrlen;	/* length of ai_addr */
+	char	*ai_canonname;	/* canonical name for hostname */
+	struct sockaddr *ai_addr;	/* binary address */
+	struct addrinfo *ai_next;	/* next structure in linked list */
+};
+#endif /* !HAVE_STRUCT_ADDRINFO */
+
+#ifndef HAVE_GETADDRINFO
+#ifdef getaddrinfo
+# undef getaddrinfo
+#endif
+#define getaddrinfo(a,b,c,d)    (fake_getaddrinfo(a,b,c,d))
+int getaddrinfo(const char *, const char *,
+    const struct addrinfo *, struct addrinfo **);
+#endif /* !HAVE_GETADDRINFO */
+
+#ifndef HAVE_GAI_STRERROR
+#define gai_strerror(a)         (fake_gai_strerror(a))
+const char *gai_strerror(int);
+#endif /* !HAVE_GAI_STRERROR */
+
+#ifndef HAVE_FREEADDRINFO
+#define freeaddrinfo(a)         (fake_freeaddrinfo(a))
+void freeaddrinfo(struct addrinfo *);
+#endif /* !HAVE_FREEADDRINFO */
+
+#ifndef HAVE_GETNAMEINFO
+#define getnameinfo(a,b,c,d,e,f,g) (fake_getnameinfo(a,b,c,d,e,f,g))
+int getnameinfo(const struct sockaddr *, size_t, char *, size_t,
+    char *, size_t, int);
+#endif /* !HAVE_GETNAMEINFO */
+
+
+#endif /* !_FAKE_RFC2553_H */

compat/fixstrtod.c

@@ -0,0 +1,36 @@
+/*
+ * fixstrtod.c --
+ *
+ *	Source code for the "fixstrtod" procedure.  This procedure is
+ *	used in place of strtod under Solaris 2.4, in order to fix
+ *	a bug where the "end" pointer gets set incorrectly.
+ *
+ * Copyright (c) 1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include <stdio.h>
+
+#undef strtod
+
+/*
+ * Declare strtod explicitly rather than including stdlib.h, since in
+ * somes systems (e.g. SunOS 4.1.4) stdlib.h doesn't declare strtod.
+ */
+
+extern double strtod(char *, char **);
+
+double
+fixstrtod(
+    char *string,
+    char **endPtr)
+{
+    double d;
+    d = strtod(string, endPtr);
+    if ((endPtr != NULL) && (*endPtr != string) && ((*endPtr)[-1] == 0)) {
+	*endPtr -= 1;
+    }
+    return d;
+}

compat/float.h

@@ -0,0 +1,14 @@
+/*
+ * float.h --
+ *
+ *	This is a dummy header file to #include in Tcl when there
+ *	is no float.h in /usr/include.  Right now this file is empty:
+ *	Tcl contains #ifdefs to deal with the lack of definitions;
+ *	all it needs is for the #include statement to work.
+ *
+ * Copyright (c) 1993 The Regents of the University of California.
+ * Copyright (c) 1994 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */

compat/gettod.c

@@ -0,0 +1,30 @@
+/*
+ * gettod.c --
+ *
+ *	This file provides the gettimeofday function on systems
+ *	that only have the System V ftime function.
+ *
+ * Copyright (c) 1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclPort.h"
+#include <sys/timeb.h>
+
+#undef timezone
+
+int
+gettimeofday(
+    struct timeval *tp,
+    struct timezone *tz)
+{
+    struct timeb t;
+
+    ftime(&t);
+    tp->tv_sec = t.time;
+    tp->tv_usec = t. millitm * 1000;
+    return 0;
+}
+

compat/license.terms

@@ -0,0 +1,40 @@
+This software is copyrighted by the Regents of the University of
+California, Sun Microsystems, Inc., Scriptics Corporation, ActiveState
+Corporation and other parties.  The following terms apply to all files
+associated with the software unless explicitly disclaimed in
+individual files.
+
+The authors hereby grant permission to use, copy, modify, distribute,
+and license this software and its documentation for any purpose, provided
+that existing copyright notices are retained in all copies and that this
+notice is included verbatim in any distributions. No written agreement,
+license, or royalty fee is required for any of the authorized uses.
+Modifications to this software may be copyrighted by their authors
+and need not follow the licensing terms described here, provided that
+the new terms are clearly indicated on the first page of each file where
+they apply.
+
+IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY
+FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY
+DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.  THIS SOFTWARE
+IS PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE
+NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
+MODIFICATIONS.
+
+GOVERNMENT USE: If you are acquiring this software on behalf of the
+U.S. government, the Government shall have only "Restricted Rights"
+in the software and related documentation as defined in the Federal
+Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2).  If you
+are acquiring the software on behalf of the Department of Defense, the
+software shall be classified as "Commercial Computer Software" and the
+Government shall have only "Restricted Rights" as defined in Clause
+252.227-7014 (b) (3) of DFARs.  Notwithstanding the foregoing, the
+authors grant the U.S. Government and others acting in its behalf
+permission to use and distribute the software in accordance with the
+terms specified in this license.

compat/memcmp.c

@@ -0,0 +1,64 @@
+/*
+ * memcmp.c --
+ *
+ *	Source code for the "memcmp" library routine.
+ *
+ * Copyright (c) 1998 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclPort.h"
+
+/*
+ * Here is the prototype just in case it is not included in tclPort.h.
+ */
+
+int		memcmp(const void *s1, const void *s2, size_t n);
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * memcmp --
+ *
+ *	Compares two bytes sequences.
+ *
+ * Results:
+ *	Compares its arguments, looking at the first n bytes (each interpreted
+ *	as an unsigned char), and returns an integer less than, equal to, or
+ *	greater than 0, according as s1 is less than, equal to, or greater
+ *	than s2 when taken to be unsigned 8 bit numbers.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+memcmp(
+    const void *s1,		/* First string. */
+    const void *s2,		/* Second string. */
+    size_t n)			/* Length to compare. */
+{
+    const unsigned char *ptr1 = (const unsigned char *) s1;
+    const unsigned char *ptr2 = (const unsigned char *) s2;
+
+    for ( ; n-- ; ptr1++, ptr2++) {
+	unsigned char u1 = *ptr1, u2 = *ptr2;
+
+	if (u1 != u2) {
+	    return (u1-u2);
+	}
+    }
+    return 0;
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */

compat/mkstemp.c

@@ -0,0 +1,78 @@
+/*
+ * mkstemp.c --
+ *
+ *	Source code for the "mkstemp" library routine.
+ *
+ * Copyright (c) 2009 Donal K. Fellows
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * mkstemp --
+ *
+ *	Create an open temporary file from a template.
+ *
+ * Results:
+ *	A file descriptor, or -1 (with errno set) in the case of an error.
+ *
+ * Side effects:
+ *	The template is updated to contain the real filename.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+mkstemp(
+    char *template)		/* Template for filename. */
+{
+    static const char alphanumerics[] =
+	"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+    register char *a, *b;
+    int fd, count, alphanumericsLen = strlen(alphanumerics); /* == 62 */
+
+    a = template + strlen(template);
+    while (a > template && *(a-1) == 'X') {
+	a--;
+    }
+
+    if (a == template) {
+	errno = ENOENT;
+	return -1;
+    }
+
+    /*
+     * We'll only try up to 10 times; after that, we're suffering from enemy
+     * action and should let the caller know.
+     */
+
+    count = 10;
+    do {
+	/*
+	 * Replace the X's in the original template with random alphanumeric
+	 * digits.
+	 */
+
+	for (b=a ; *b ; b++) {
+	    float r = rand() / ((float) RAND_MAX);
+
+	    *b = alphanumerics[(int)(r * alphanumericsLen)];
+	}
+
+	/*
+	 * Template is now realized; try to open (with correct options).
+	 */
+
+	fd = open(template, O_RDWR|O_CREAT|O_EXCL, 0600);
+    } while (fd == -1 && errno == EEXIST && --count > 0);
+
+    return fd;
+}

compat/opendir.c

@@ -0,0 +1,110 @@
+/*
+ * opendir.c --
+ *
+ *	This file provides dirent-style directory-reading procedures for V7
+ *	Unix systems that don't have such procedures. The origin of this code
+ *	is unclear, but it seems to have come originally from Larry Wall.
+ */
+
+#include "tclInt.h"
+
+#undef DIRSIZ
+#define DIRSIZ(dp) \
+    ((sizeof(struct dirent) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))
+
+/*
+ * open a directory.
+ */
+
+DIR *
+opendir(
+    char *name)
+{
+    register DIR *dirp;
+    register int fd;
+    char *myname;
+
+    myname = ((*name == '\0') ? "." : name);
+    if ((fd = open(myname, 0, 0)) == -1) {
+	return NULL;
+    }
+    dirp = (DIR *) ckalloc(sizeof(DIR));
+    if (dirp == NULL) {
+	/* unreachable? */
+	close(fd);
+	return NULL;
+    }
+    dirp->dd_fd = fd;
+    dirp->dd_loc = 0;
+    return dirp;
+}
+
+/*
+ * read an old style directory entry and present it as a new one
+ */
+#ifndef pyr
+#define	ODIRSIZ	14
+
+struct olddirect {
+    ino_t od_ino;
+    char od_name[ODIRSIZ];
+};
+#else	/* a Pyramid in the ATT universe */
+#define	ODIRSIZ	248
+
+struct olddirect {
+    long od_ino;
+    short od_fill1, od_fill2;
+    char od_name[ODIRSIZ];
+};
+#endif
+
+/*
+ * get next entry in a directory.
+ */
+
+struct dirent *
+readdir(
+    register DIR *dirp)
+{
+    register struct olddirect *dp;
+    static struct dirent dir;
+
+    for (;;) {
+	if (dirp->dd_loc == 0) {
+	    dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
+	    if (dirp->dd_size <= 0) {
+		return NULL;
+	    }
+	}
+	if (dirp->dd_loc >= dirp->dd_size) {
+	    dirp->dd_loc = 0;
+	    continue;
+	}
+	dp = (struct olddirect *)(dirp->dd_buf + dirp->dd_loc);
+	dirp->dd_loc += sizeof(struct olddirect);
+	if (dp->od_ino == 0) {
+	    continue;
+	}
+	dir.d_ino = dp->od_ino;
+	strncpy(dir.d_name, dp->od_name, ODIRSIZ);
+	dir.d_name[ODIRSIZ] = '\0'; /* insure null termination */
+	dir.d_namlen = strlen(dir.d_name);
+	dir.d_reclen = DIRSIZ(&dir);
+	return &dir;
+    }
+}
+
+/*
+ * close a directory.
+ */
+
+void
+closedir(
+    register DIR *dirp)
+{
+    close(dirp->dd_fd);
+    dirp->dd_fd = -1;
+    dirp->dd_loc = 0;
+    ckfree((char *) dirp);
+}

compat/stdlib.h

@@ -0,0 +1,36 @@
+/*
+ * stdlib.h --
+ *
+ *	Declares facilities exported by the "stdlib" portion of the C library.
+ *	This file isn't complete in the ANSI-C sense; it only declares things
+ *	that are needed by Tcl. This file is needed even on many systems with
+ *	their own stdlib.h (e.g. SunOS) because not all stdlib.h files declare
+ *	all the procedures needed here (such as strtod).
+ *
+ * Copyright (c) 1991 The Regents of the University of California.
+ * Copyright (c) 1994-1998 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifndef _STDLIB
+#define _STDLIB
+
+extern void		abort(void);
+extern double		atof(const char *string);
+extern int		atoi(const char *string);
+extern long		atol(const char *string);
+extern char *		calloc(unsigned int numElements, unsigned int size);
+extern void		exit(int status);
+extern int		free(char *blockPtr);
+extern char *		getenv(const char *name);
+extern char *		malloc(unsigned int numBytes);
+extern void		qsort(void *base, int n, int size, int (*compar)(
+			    const void *element1, const void *element2));
+extern char *		realloc(char *ptr, unsigned int numBytes);
+extern double		strtod(const char *string, char **endPtr);
+extern long		strtol(const char *string, char **endPtr, int base);
+extern unsigned long	strtoul(const char *string, char **endPtr, int base);
+
+#endif /* _STDLIB */

compat/string.h

@@ -0,0 +1,57 @@
+/*
+ * string.h --
+ *
+ *	Declarations of ANSI C library procedures for string handling.
+ *
+ * Copyright (c) 1991-1993 The Regents of the University of California.
+ * Copyright (c) 1994-1996 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifndef _STRING
+#define _STRING
+
+/*
+ * The following #include is needed to define size_t. (This used to include
+ * sys/stdtypes.h but that doesn't exist on older versions of SunOS, e.g.
+ * 4.0.2, so I'm trying sys/types.h now.... hopefully it exists everywhere)
+ */
+
+#include <sys/types.h>
+
+#ifdef __APPLE__
+extern void *		memchr(const void *s, int c, size_t n);
+#else
+extern char *		memchr(const void *s, int c, size_t n);
+#endif
+extern int		memcmp(const void *s1, const void *s2, size_t n);
+extern char *		memcpy(void *t, const void *f, size_t n);
+#ifdef NO_MEMMOVE
+#define memmove(d,s,n)	(bcopy((s), (d), (n)))
+#else
+extern char *		memmove(void *t, const void *f, size_t n);
+#endif
+extern char *		memset(void *s, int c, size_t n);
+
+extern int		strcasecmp(const char *s1, const char *s2);
+extern char *		strcat(char *dst, const char *src);
+extern char *		strchr(const char *string, int c);
+extern int		strcmp(const char *s1, const char *s2);
+extern char *		strcpy(char *dst, const char *src);
+extern size_t		strcspn(const char *string, const char *chars);
+extern char *		strdup(const char *string);
+extern char *		strerror(int error);
+extern size_t		strlen(const char *string);
+extern int		strncasecmp(const char *s1, const char *s2, size_t n);
+extern char *		strncat(char *dst, const char *src, size_t numChars);
+extern int		strncmp(const char *s1, const char *s2, size_t nChars);
+extern char *		strncpy(char *dst, const char *src, size_t numChars);
+extern char *		strpbrk(const char *string, const char *chars);
+extern char *		strrchr(const char *string, int c);
+extern size_t		strspn(const char *string, const char *chars);
+extern char *		strstr(const char *string, const char *substring);
+extern char *		strtok(char *s, const char *delim);
+
+#endif /* _STRING */

compat/strncasecmp.c

@@ -0,0 +1,136 @@
+/*
+ * strncasecmp.c --
+ *
+ *	Source code for the "strncasecmp" library routine.
+ *
+ * Copyright (c) 1988-1993 The Regents of the University of California.
+ * Copyright (c) 1995-1996 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclPort.h"
+
+/*
+ * This array is designed for mapping upper and lower case letter together for
+ * a case independent comparison. The mappings are based upon ASCII character
+ * sequences.
+ */
+
+static const unsigned char charmap[] = {
+    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+    0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+    0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
+    0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+    0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+    0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+    0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
+    0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+    0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+    0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+    0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
+    0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+    0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
+    0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+    0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
+    0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
+    0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
+    0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
+    0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
+    0xc0, 0xe1, 0xe2, 0xe3, 0xe4, 0xc5, 0xe6, 0xe7,
+    0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
+    0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
+    0xf8, 0xf9, 0xfa, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
+    0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
+    0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
+    0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
+    0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
+};
+
+/*
+ * Here are the prototypes just in case they are not included in tclPort.h.
+ */
+
+int		strncasecmp(const char *s1, const char *s2, size_t n);
+int		strcasecmp(const char *s1, const char *s2);
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * strcasecmp --
+ *
+ *	Compares two strings, ignoring case differences.
+ *
+ * Results:
+ *	Compares two null-terminated strings s1 and s2, returning -1, 0, or 1
+ *	if s1 is lexicographically less than, equal to, or greater than s2.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+strcasecmp(
+    const char *s1,		/* First string. */
+    const char *s2)		/* Second string. */
+{
+    unsigned char u1, u2;
+
+    for ( ; ; s1++, s2++) {
+	u1 = (unsigned char) *s1;
+	u2 = (unsigned char) *s2;
+	if ((u1 == '\0') || (charmap[u1] != charmap[u2])) {
+	    break;
+	}
+    }
+    return charmap[u1] - charmap[u2];
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * strncasecmp --
+ *
+ *	Compares two strings, ignoring case differences.
+ *
+ * Results:
+ *	Compares up to length chars of s1 and s2, returning -1, 0, or 1 if s1
+ *	is lexicographically less than, equal to, or greater than s2 over
+ *	those characters.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+strncasecmp(
+    const char *s1,		/* First string. */
+    const char *s2,		/* Second string. */
+    size_t length)		/* Maximum number of characters to compare
+				 * (stop earlier if the end of either string
+				 * is reached). */
+{
+    unsigned char u1, u2;
+
+    for (; length != 0; length--, s1++, s2++) {
+	u1 = (unsigned char) *s1;
+	u2 = (unsigned char) *s2;
+	if (charmap[u1] != charmap[u2]) {
+	    return charmap[u1] - charmap[u2];
+	}
+	if (u1 == '\0') {
+	    return 0;
+	}
+    }
+    return 0;
+}

compat/strstr.c

@@ -0,0 +1,70 @@
+/*
+ * strstr.c --
+ *
+ *	Source code for the "strstr" library routine.
+ *
+ * Copyright (c) 1988-1993 The Regents of the University of California.
+ * Copyright (c) 1994 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tcl.h"
+#ifndef NULL
+#define NULL 0
+#endif
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * strstr --
+ *
+ *	Locate the first instance of a substring in a string.
+ *
+ * Results:
+ *	If string contains substring, the return value is the location of the
+ *	first matching instance of substring in string. If string doesn't
+ *	contain substring, the return value is 0. Matching is done on an exact
+ *	character-for-character basis with no wildcards or special characters.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+char *
+strstr(
+    register char *string,	/* String to search. */
+    char *substring)		/* Substring to try to find in string. */
+{
+    register char *a, *b;
+
+    /*
+     * First scan quickly through the two strings looking for a
+     * single-character match. When it's found, then compare the rest of the
+     * substring.
+     */
+
+    b = substring;
+    if (*b == 0) {
+	return string;
+    }
+    for ( ; *string != 0; string += 1) {
+	if (*string != *b) {
+	    continue;
+	}
+	a = string;
+	while (1) {
+	    if (*b == 0) {
+		return string;
+	    }
+	    if (*a++ != *b++) {
+		break;
+	    }
+	}
+	b = substring;
+    }
+    return NULL;
+}

compat/strtod.c

@@ -0,0 +1,252 @@
+/*
+ * strtod.c --
+ *
+ *	Source code for the "strtod" library procedure.
+ *
+ * Copyright (c) 1988-1993 The Regents of the University of California.
+ * Copyright (c) 1994 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclInt.h"
+
+#ifndef TRUE
+#define TRUE 1
+#define FALSE 0
+#endif
+#ifndef NULL
+#define NULL 0
+#endif
+
+static const int maxExponent = 511;	/* Largest possible base 10 exponent.  Any
+				 * exponent larger than this will already
+				 * produce underflow or overflow, so there's
+				 * no need to worry about additional digits.
+				 */
+static const double powersOf10[] = {	/* Table giving binary powers of 10.  Entry */
+    10.,			/* is 10^2^i.  Used to convert decimal */
+    100.,			/* exponents into floating-point numbers. */
+    1.0e4,
+    1.0e8,
+    1.0e16,
+    1.0e32,
+    1.0e64,
+    1.0e128,
+    1.0e256
+};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * strtod --
+ *
+ *	This procedure converts a floating-point number from an ASCII
+ *	decimal representation to internal double-precision format.
+ *
+ * Results:
+ *	The return value is the double-precision floating-point
+ *	representation of the characters in string.  If endPtr isn't
+ *	NULL, then *endPtr is filled in with the address of the
+ *	next character after the last one that was part of the
+ *	floating-point number.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+double
+strtod(
+    const char *string,		/* A decimal ASCII floating-point number,
+				 * optionally preceded by white space. Must
+				 * have form "-I.FE-X", where I is the integer
+				 * part of the mantissa, F is the fractional
+				 * part of the mantissa, and X is the
+				 * exponent. Either of the signs may be "+",
+				 * "-", or omitted. Either I or F may be
+				 * omitted, or both. The decimal point isn't
+				 * necessary unless F is present. The "E" may
+				 * actually be an "e". E and X may both be
+				 * omitted (but not just one). */
+    char **endPtr)		/* If non-NULL, store terminating character's
+				 * address here. */
+{
+    int sign, expSign = FALSE;
+    double fraction, dblExp;
+    const double *d;
+    register const char *p;
+    register int c;
+    int exp = 0;		/* Exponent read from "EX" field. */
+    int fracExp = 0;		/* Exponent that derives from the fractional
+				 * part. Under normal circumstatnces, it is
+				 * the negative of the number of digits in F.
+				 * However, if I is very long, the last digits
+				 * of I get dropped (otherwise a long I with a
+				 * large negative exponent could cause an
+				 * unnecessary overflow on I alone). In this
+				 * case, fracExp is incremented one for each
+				 * dropped digit. */
+    int mantSize;		/* Number of digits in mantissa. */
+    int decPt;			/* Number of mantissa digits BEFORE decimal
+				 * point. */
+    const char *pExp;		/* Temporarily holds location of exponent in
+				 * string. */
+
+    /*
+     * Strip off leading blanks and check for a sign.
+     */
+
+    p = string;
+    while (isspace(UCHAR(*p))) {
+	p += 1;
+    }
+    if (*p == '-') {
+	sign = TRUE;
+	p += 1;
+    } else {
+	if (*p == '+') {
+	    p += 1;
+	}
+	sign = FALSE;
+    }
+
+    /*
+     * Count the number of digits in the mantissa (including the decimal
+     * point), and also locate the decimal point.
+     */
+
+    decPt = -1;
+    for (mantSize = 0; ; mantSize += 1)
+    {
+	c = *p;
+	if (!isdigit(c)) {
+	    if ((c != '.') || (decPt >= 0)) {
+		break;
+	    }
+	    decPt = mantSize;
+	}
+	p += 1;
+    }
+
+    /*
+     * Now suck up the digits in the mantissa. Use two integers to collect 9
+     * digits each (this is faster than using floating-point). If the mantissa
+     * has more than 18 digits, ignore the extras, since they can't affect the
+     * value anyway.
+     */
+
+    pExp  = p;
+    p -= mantSize;
+    if (decPt < 0) {
+	decPt = mantSize;
+    } else {
+	mantSize -= 1;		/* One of the digits was the point. */
+    }
+    if (mantSize > 18) {
+	fracExp = decPt - 18;
+	mantSize = 18;
+    } else {
+	fracExp = decPt - mantSize;
+    }
+    if (mantSize == 0) {
+	fraction = 0.0;
+	p = string;
+	goto done;
+    } else {
+	int frac1, frac2;
+
+	frac1 = 0;
+	for ( ; mantSize > 9; mantSize -= 1) {
+	    c = *p;
+	    p += 1;
+	    if (c == '.') {
+		c = *p;
+		p += 1;
+	    }
+	    frac1 = 10*frac1 + (c - '0');
+	}
+	frac2 = 0;
+	for (; mantSize > 0; mantSize -= 1) {
+	    c = *p;
+	    p += 1;
+	    if (c == '.') {
+		c = *p;
+		p += 1;
+	    }
+	    frac2 = 10*frac2 + (c - '0');
+	}
+	fraction = (1.0e9 * frac1) + frac2;
+    }
+
+    /*
+     * Skim off the exponent.
+     */
+
+    p = pExp;
+    if ((*p == 'E') || (*p == 'e')) {
+	p += 1;
+	if (*p == '-') {
+	    expSign = TRUE;
+	    p += 1;
+	} else {
+	    if (*p == '+') {
+		p += 1;
+	    }
+	    expSign = FALSE;
+	}
+	if (!isdigit(UCHAR(*p))) {
+	    p = pExp;
+	    goto done;
+	}
+	while (isdigit(UCHAR(*p))) {
+	    exp = exp * 10 + (*p - '0');
+	    p += 1;
+	}
+    }
+    if (expSign) {
+	exp = fracExp - exp;
+    } else {
+	exp = fracExp + exp;
+    }
+
+    /*
+     * Generate a floating-point number that represents the exponent. Do this
+     * by processing the exponent one bit at a time to combine many powers of
+     * 2 of 10. Then combine the exponent with the fraction.
+     */
+
+    if (exp < 0) {
+	expSign = TRUE;
+	exp = -exp;
+    } else {
+	expSign = FALSE;
+    }
+    if (exp > maxExponent) {
+	exp = maxExponent;
+	errno = ERANGE;
+    }
+    dblExp = 1.0;
+    for (d = powersOf10; exp != 0; exp >>= 1, ++d) {
+	if (exp & 01) {
+	    dblExp *= *d;
+	}
+    }
+    if (expSign) {
+	fraction /= dblExp;
+    } else {
+	fraction *= dblExp;
+    }
+
+  done:
+    if (endPtr != NULL) {
+	*endPtr = (char *) p;
+    }
+
+    if (sign) {
+	return -fraction;
+    }
+    return fraction;
+}

compat/strtol.c

@@ -0,0 +1,77 @@
+/*
+ * strtol.c --
+ *
+ *	Source code for the "strtol" library procedure.
+ *
+ * Copyright (c) 1988 The Regents of the University of California.
+ * Copyright (c) 1994 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclInt.h"
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * strtol --
+ *
+ *	Convert an ASCII string into an integer.
+ *
+ * Results:
+ *	The return value is the integer equivalent of string. If endPtr is
+ *	non-NULL, then *endPtr is filled in with the character after the last
+ *	one that was part of the integer. If string doesn't contain a valid
+ *	integer value, then zero is returned and *endPtr is set to string.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+long int
+strtol(
+    const char *string,		/* String of ASCII digits, possibly preceded
+				 * by white space. For bases greater than 10,
+				 * either lower- or upper-case digits may be
+				 * used. */
+    char **endPtr,		/* Where to store address of terminating
+				 * character, or NULL. */
+    int base)			/* Base for conversion. Must be less than 37.
+				 * If 0, then the base is chosen from the
+				 * leading characters of string: "0x" means
+				 * hex, "0" means octal, anything else means
+				 * decimal. */
+{
+    register const char *p;
+    long result;
+
+    /*
+     * Skip any leading blanks.
+     */
+
+    p = string;
+    while (isspace(UCHAR(*p))) {
+	p += 1;
+    }
+
+    /*
+     * Check for a sign.
+     */
+
+    if (*p == '-') {
+	p += 1;
+	result = -(strtoul(p, endPtr, base));
+    } else {
+	if (*p == '+') {
+	    p += 1;
+	}
+	result = strtoul(p, endPtr, base);
+    }
+    if ((result == 0) && (endPtr != 0) && (*endPtr == p)) {
+	*endPtr = (char *) string;
+    }
+    return result;
+}

compat/strtoul.c

@@ -0,0 +1,214 @@
+/*
+ * strtoul.c --
+ *
+ *	Source code for the "strtoul" library procedure.
+ *
+ * Copyright (c) 1988 The Regents of the University of California.
+ * Copyright (c) 1994 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclInt.h"
+
+/*
+ * The table below is used to convert from ASCII digits to a numerical
+ * equivalent. It maps from '0' through 'z' to integers (100 for non-digit
+ * characters).
+ */
+
+static const char cvtIn[] = {
+    0, 1, 2, 3, 4, 5, 6, 7, 8, 9,		/* '0' - '9' */
+    100, 100, 100, 100, 100, 100, 100,		/* punctuation */
+    10, 11, 12, 13, 14, 15, 16, 17, 18, 19,	/* 'A' - 'Z' */
+    20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
+    30, 31, 32, 33, 34, 35,
+    100, 100, 100, 100, 100, 100,		/* punctuation */
+    10, 11, 12, 13, 14, 15, 16, 17, 18, 19,	/* 'a' - 'z' */
+    20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
+    30, 31, 32, 33, 34, 35};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * strtoul --
+ *
+ *	Convert an ASCII string into an integer.
+ *
+ * Results:
+ *	The return value is the integer equivalent of string. If endPtr is
+ *	non-NULL, then *endPtr is filled in with the character after the last
+ *	one that was part of the integer. If string doesn't contain a valid
+ *	integer value, then zero is returned and *endPtr is set to string.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+unsigned long int
+strtoul(
+    const char *string,		/* String of ASCII digits, possibly preceded
+				 * by white space. For bases greater than 10,
+				 * either lower- or upper-case digits may be
+				 * used. */
+    char **endPtr,		/* Where to store address of terminating
+				 * character, or NULL. */
+    int base)			/* Base for conversion.  Must be less than 37.
+				 * If 0, then the base is chosen from the
+				 * leading characters of string: "0x" means
+				 * hex, "0" means octal, anything else means
+				 * decimal. */
+{
+    register const char *p;
+    register unsigned long int result = 0;
+    register unsigned digit;
+    int anyDigits = 0;
+    int negative=0;
+    int overflow=0;
+
+    /*
+     * Skip any leading blanks.
+     */
+
+    p = string;
+    while (isspace(UCHAR(*p))) {
+	p += 1;
+    }
+    if (*p == '-') {
+        negative = 1;
+        p += 1;
+    } else {
+        if (*p == '+') {
+            p += 1;
+        }
+    }
+
+    /*
+     * If no base was provided, pick one from the leading characters of the
+     * string.
+     */
+
+    if (base == 0) {
+	if (*p == '0') {
+	    p += 1;
+	    if ((*p == 'x') || (*p == 'X')) {
+		p += 1;
+		base = 16;
+	    } else {
+		/*
+		 * Must set anyDigits here, otherwise "0" produces a "no
+		 * digits" error.
+		 */
+
+		anyDigits = 1;
+		base = 8;
+	    }
+	} else {
+	    base = 10;
+	}
+    } else if (base == 16) {
+	/*
+	 * Skip a leading "0x" from hex numbers.
+	 */
+
+	if ((p[0] == '0') && ((p[1] == 'x') || (p[1] == 'X'))) {
+	    p += 2;
+	}
+    }
+
+    /*
+     * Sorry this code is so messy, but speed seems important. Do different
+     * things for base 8, 10, 16, and other.
+     */
+
+    if (base == 8) {
+	unsigned long maxres = ULONG_MAX >> 3;
+
+	for ( ; ; p += 1) {
+	    digit = *p - '0';
+	    if (digit > 7) {
+		break;
+	    }
+	    if (result > maxres) { overflow = 1; }
+	    result = (result << 3);
+	    if (digit > (ULONG_MAX - result)) { overflow = 1; }
+	    result += digit;
+	    anyDigits = 1;
+	}
+    } else if (base == 10) {
+	unsigned long maxres = ULONG_MAX / 10;
+
+	for ( ; ; p += 1) {
+	    digit = *p - '0';
+	    if (digit > 9) {
+		break;
+	    }
+	    if (result > maxres) { overflow = 1; }
+	    result *= 10;
+	    if (digit > (ULONG_MAX - result)) { overflow = 1; }
+	    result += digit;
+	    anyDigits = 1;
+	}
+    } else if (base == 16) {
+	unsigned long maxres = ULONG_MAX >> 4;
+
+	for ( ; ; p += 1) {
+	    digit = *p - '0';
+	    if (digit > ('z' - '0')) {
+		break;
+	    }
+	    digit = cvtIn[digit];
+	    if (digit > 15) {
+		break;
+	    }
+	    if (result > maxres) { overflow = 1; }
+	    result = (result << 4);
+	    if (digit > (ULONG_MAX - result)) { overflow = 1; }
+	    result += digit;
+	    anyDigits = 1;
+	}
+    } else if (base >= 2 && base <= 36) {
+	unsigned long maxres = ULONG_MAX / base;
+
+	for ( ; ; p += 1) {
+	    digit = *p - '0';
+	    if (digit > ('z' - '0')) {
+		break;
+	    }
+	    digit = cvtIn[digit];
+	    if (digit >= ( (unsigned) base )) {
+		break;
+	    }
+	    if (result > maxres) { overflow = 1; }
+	    result *= base;
+	    if (digit > (ULONG_MAX - result)) { overflow = 1; }
+	    result += digit;
+	    anyDigits = 1;
+	}
+    }
+
+    /*
+     * See if there were any digits at all.
+     */
+
+    if (!anyDigits) {
+	p = string;
+    }
+
+    if (endPtr != 0) {
+	/* unsafe, but required by the strtoul prototype */
+	*endPtr = (char *) p;
+    }
+
+    if (overflow) {
+	errno = ERANGE;
+	return ULONG_MAX;
+    }
+    if (negative) {
+	return -result;
+    }
+    return result;
+}

compat/unistd.h

@@ -0,0 +1,76 @@
+/*
+ * unistd.h --
+ *
+ *      Macros, constants and prototypes for Posix conformance.
+ *
+ * Copyright 1989 Regents of the University of California Permission to use,
+ * copy, modify, and distribute this software and its documentation for any
+ * purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies. The University of California makes
+ * no representations about the suitability of this software for any purpose.
+ * It is provided "as is" without express or implied warranty.
+ */
+
+#ifndef _UNISTD
+#define _UNISTD
+
+#include <sys/types.h>
+
+#ifndef NULL
+#define NULL    0
+#endif
+
+/*
+ * Strict POSIX stuff goes here. Extensions go down below, in the ifndef
+ * _POSIX_SOURCE section.
+ */
+
+extern void		_exit(int status);
+extern int		access(const char *path, int mode);
+extern int		chdir(const char *path);
+extern int		chown(const char *path, uid_t owner, gid_t group);
+extern int		close(int fd);
+extern int		dup(int oldfd);
+extern int		dup2(int oldfd, int newfd);
+extern int		execl(const char *path, ...);
+extern int		execle(const char *path, ...);
+extern int		execlp(const char *file, ...);
+extern int		execv(const char *path, char **argv);
+extern int		execve(const char *path, char **argv, char **envp);
+extern int		execvpw(const char *file, char **argv);
+extern pid_t		fork(void);
+extern char *		getcwd(char *buf, size_t size);
+extern gid_t		getegid(void);
+extern uid_t		geteuid(void);
+extern gid_t		getgid(void);
+extern int		getgroups(int bufSize, int *buffer);
+extern pid_t		getpid(void);
+extern uid_t		getuid(void);
+extern int		isatty(int fd);
+extern long		lseek(int fd, long offset, int whence);
+extern int		pipe(int *fildes);
+extern int		read(int fd, char *buf, size_t size);
+extern int		setgid(gid_t group);
+extern int		setuid(uid_t user);
+extern unsigned		sleep(unsigned seconds);
+extern char *		ttyname(int fd);
+extern int		unlink(const char *path);
+extern int		write(int fd, const char *buf, size_t size);
+
+#ifndef	_POSIX_SOURCE
+extern char *		crypt(const char *, const char *);
+extern int		fchown(int fd, uid_t owner, gid_t group);
+extern int		flock(int fd, int operation);
+extern int		ftruncate(int fd, unsigned long length);
+extern int		ioctl(int fd, int request, ...);
+extern int		readlink(const char *path, char *buf, int bufsize);
+extern int		setegid(gid_t group);
+extern int		seteuidw(uid_t user);
+extern int		setreuid(int ruid, int euid);
+extern int		symlink(const char *, const char *);
+extern int		ttyslot(void);
+extern int		truncate(const char *path, unsigned long length);
+extern int		vfork(void);
+#endif /* _POSIX_SOURCE */
+
+#endif /* _UNISTD */

compat/waitpid.c

@@ -0,0 +1,168 @@
+/*
+ * waitpid.c --
+ *
+ *	This procedure emulates the POSIX waitpid kernel call on BSD systems
+ *	that don't have waitpid but do have wait3. This code is based on a
+ *	prototype version written by Mark Diekhans and Karl Lehenbauer.
+ *
+ * Copyright (c) 1993 The Regents of the University of California.
+ * Copyright (c) 1994 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclPort.h"
+
+#ifndef pid_t
+#define pid_t int
+#endif
+
+/*
+ * A linked list of the following structures is used to keep track of
+ * processes for which we received notification from the kernel, but the
+ * application hasn't waited for them yet (this can happen because wait may
+ * not return the process we really want). We save the information here until
+ * the application finally does wait for the process.
+ */
+
+typedef struct WaitInfo {
+    pid_t pid;			/* Pid of process that exited. */
+    WAIT_STATUS_TYPE status;	/* Status returned when child exited or
+				 * suspended. */
+    struct WaitInfo *nextPtr;	/* Next in list of exited processes. */
+} WaitInfo;
+
+static WaitInfo *deadList = NULL;
+				/* First in list of all dead processes. */
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * waitpid --
+ *
+ *	This procedure emulates the functionality of the POSIX waitpid kernel
+ *	call, using the BSD wait3 kernel call. Note: it doesn't emulate
+ *	absolutely all of the waitpid functionality, in that it doesn't
+ *	support pid's of 0 or < -1.
+ *
+ * Results:
+ *	-1 is returned if there is an error in the wait kernel call. Otherwise
+ *	the pid of an exited or suspended process is returned and *statusPtr
+ *	is set to the status value of the process.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+#ifdef waitpid
+#   undef waitpid
+#endif
+
+pid_t
+waitpid(
+    pid_t pid,			/* The pid to wait on. Must be -1 or greater
+				 * than zero. */
+    int *statusPtr,		/* Where to store wait status for the
+				 * process. */
+    int options)		/* OR'ed combination of WNOHANG and
+				 * WUNTRACED. */
+{
+    register WaitInfo *waitPtr, *prevPtr;
+    pid_t result;
+    WAIT_STATUS_TYPE status;
+
+    if ((pid < -1) || (pid == 0)) {
+	errno = EINVAL;
+	return -1;
+    }
+
+    /*
+     * See if there's a suitable process that has already stopped or exited.
+     * If so, remove it from the list of exited processes and return its
+     * information.
+     */
+
+    for (waitPtr = deadList, prevPtr = NULL; waitPtr != NULL;
+	    prevPtr = waitPtr, waitPtr = waitPtr->nextPtr) {
+	if ((pid != waitPtr->pid) && (pid != -1)) {
+	    continue;
+	}
+	if (!(options & WUNTRACED) && (WIFSTOPPED(waitPtr->status))) {
+	    continue;
+	}
+	result = waitPtr->pid;
+	*statusPtr = *((int *) &waitPtr->status);
+	if (prevPtr == NULL) {
+	    deadList = waitPtr->nextPtr;
+	} else {
+	    prevPtr->nextPtr = waitPtr->nextPtr;
+	}
+	ckfree((char *) waitPtr);
+	return result;
+    }
+
+    /*
+     * Wait for any process to stop or exit. If it's an acceptable one then
+     * return it to the caller; otherwise store information about it in the
+     * list of exited processes and try again. On systems that have only wait
+     * but not wait3, there are several situations we can't handle, but we do
+     * the best we can (e.g. can still handle some combinations of options by
+     * invoking wait instead of wait3).
+     */
+
+    while (1) {
+#if NO_WAIT3
+	if (options & WNOHANG) {
+	    return 0;
+	}
+	if (options != 0) {
+	    errno = EINVAL;
+	    return -1;
+	}
+	result = wait(&status);
+#else
+	result = wait3(&status, options, 0);
+#endif
+	if ((result == -1) && (errno == EINTR)) {
+	    continue;
+	}
+	if (result <= 0) {
+	    return result;
+	}
+
+	if ((pid != result) && (pid != -1)) {
+	    goto saveInfo;
+	}
+	if (!(options & WUNTRACED) && (WIFSTOPPED(status))) {
+	    goto saveInfo;
+	}
+	*statusPtr = *((int *) &status);
+	return result;
+
+	/*
+	 * Can't return this info to caller. Save it in the list of stopped or
+	 * exited processes. Tricky point: first check for an existing entry
+	 * for the process and overwrite it if it exists (e.g. a previously
+	 * stopped process might now be dead).
+	 */
+
+    saveInfo:
+	for (waitPtr = deadList; waitPtr != NULL; waitPtr = waitPtr->nextPtr) {
+	    if (waitPtr->pid == result) {
+		waitPtr->status = status;
+		goto waitAgain;
+	    }
+	}
+	waitPtr = (WaitInfo *) ckalloc(sizeof(WaitInfo));
+	waitPtr->pid = result;
+	waitPtr->status = status;
+	waitPtr->nextPtr = deadList;
+	deadList = waitPtr;
+
+    waitAgain:
+	continue;
+    }
+}

compat/zlib/README

@@ -0,0 +1,115 @@
+ZLIB DATA COMPRESSION LIBRARY
+
+zlib 1.2.11 is a general purpose data compression library.  All the code is
+thread safe.  The data format used by the zlib library is described by RFCs
+(Request for Comments) 1950 to 1952 in the files
+http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and
+rfc1952 (gzip format).
+
+All functions of the compression library are documented in the file zlib.h
+(volunteer to write man pages welcome, contact zlib@gzip.org).  A usage example
+of the library is given in the file test/example.c which also tests that
+the library is working correctly.  Another example is given in the file
+test/minigzip.c.  The compression library itself is composed of all source
+files in the root directory.
+
+To compile all files and run the test program, follow the instructions given at
+the top of Makefile.in.  In short "./configure; make test", and if that goes
+well, "make install" should work for most flavors of Unix.  For Windows, use
+one of the special makefiles in win32/ or contrib/vstudio/ .  For VMS, use
+make_vms.com.
+
+Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
+<info@winimage.com> for the Windows DLL version.  The zlib home page is
+http://zlib.net/ .  Before reporting a problem, please check this site to
+verify that you have the latest version of zlib; otherwise get the latest
+version and check whether the problem still exists or not.
+
+PLEASE read the zlib FAQ http://zlib.net/zlib_faq.html before asking for help.
+
+Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan.  1997
+issue of Dr.  Dobb's Journal; a copy of the article is available at
+http://marknelson.us/1997/01/01/zlib-engine/ .
+
+The changes made in version 1.2.11 are documented in the file ChangeLog.
+
+Unsupported third party contributions are provided in directory contrib/ .
+
+zlib is available in Java using the java.util.zip package, documented at
+http://java.sun.com/developer/technicalArticles/Programming/compression/ .
+
+A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is available
+at CPAN (Comprehensive Perl Archive Network) sites, including
+http://search.cpan.org/~pmqs/IO-Compress-Zlib/ .
+
+A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
+available in Python 1.5 and later versions, see
+http://docs.python.org/library/zlib.html .
+
+zlib is built into tcl: http://wiki.tcl.tk/4610 .
+
+An experimental package to read and write files in .zip format, written on top
+of zlib by Gilles Vollant <info@winimage.com>, is available in the
+contrib/minizip directory of zlib.
+
+
+Notes for some targets:
+
+- For Windows DLL versions, please see win32/DLL_FAQ.txt
+
+- For 64-bit Irix, deflate.c must be compiled without any optimization. With
+  -O, one libpng test fails. The test works in 32 bit mode (with the -n32
+  compiler flag). The compiler bug has been reported to SGI.
+
+- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works
+  when compiled with cc.
+
+- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is
+  necessary to get gzprintf working correctly. This is done by configure.
+
+- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
+  other compilers. Use "make test" to check your compiler.
+
+- gzdopen is not supported on RISCOS or BEOS.
+
+- For PalmOs, see http://palmzlib.sourceforge.net/
+
+
+Acknowledgments:
+
+  The deflate format used by zlib was defined by Phil Katz.  The deflate and
+  zlib specifications were written by L.  Peter Deutsch.  Thanks to all the
+  people who reported problems and suggested various improvements in zlib; they
+  are too numerous to cite here.
+
+Copyright notice:
+
+ (C) 1995-2017 Jean-loup Gailly and Mark Adler
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+
+  Jean-loup Gailly        Mark Adler
+  jloup@gzip.org          madler@alumni.caltech.edu
+
+If you use the zlib library in a product, we would appreciate *not* receiving
+lengthy legal documents to sign.  The sources are provided for free but without
+warranty of any kind.  The library has been entirely written by Jean-loup
+Gailly and Mark Adler; it does not include third-party code.
+
+If you redistribute modified sources, we would appreciate that you include in
+the file ChangeLog history information documenting your changes.  Please read
+the FAQ for more information on the distribution of modified source versions.