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diff --git a/lib/uname.c b/lib/uname.c
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+/* uname replacement.
+ Copyright (C) 2009-2020 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+/* Specification. */
+#include <sys/utsname.h>
+
+/* This file provides an implementation only for the native Windows API. */
+#if defined _WIN32 && ! defined __CYGWIN__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <windows.h>
+
+/* Mingw headers don't have all the platform codes. */
+#ifndef VER_PLATFORM_WIN32_CE
+# define VER_PLATFORM_WIN32_CE 3
+#endif
+
+/* Some headers don't have all the processor architecture codes. */
+#ifndef PROCESSOR_ARCHITECTURE_AMD64
+# define PROCESSOR_ARCHITECTURE_AMD64 9
+#endif
+#ifndef PROCESSOR_ARCHITECTURE_IA32_ON_WIN64
+# define PROCESSOR_ARCHITECTURE_IA32_ON_WIN64 10
+#endif
+
+/* Mingw headers don't have the latest processor codes. */
+#ifndef PROCESSOR_AMD_X8664
+# define PROCESSOR_AMD_X8664 8664
+#endif
+
+int
+uname (struct utsname *buf)
+{
+ OSVERSIONINFO version;
+ OSVERSIONINFOEX versionex;
+ BOOL have_versionex; /* indicates whether versionex is filled */
+ const char *super_version;
+
+ /* Preparation: Fill version and, if possible, also versionex.
+ But try to call GetVersionEx only once in the common case. */
+ versionex.dwOSVersionInfoSize = sizeof (OSVERSIONINFOEX);
+ have_versionex = GetVersionEx ((OSVERSIONINFO *) &versionex);
+ if (have_versionex)
+ {
+ /* We know that OSVERSIONINFO is a subset of OSVERSIONINFOEX. */
+ memcpy (&version, &versionex, sizeof (OSVERSIONINFO));
+ }
+ else
+ {
+ version.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
+ if (!GetVersionEx (&version))
+ abort ();
+ }
+
+ /* Fill in nodename. */
+ if (gethostname (buf->nodename, sizeof (buf->nodename)) < 0)
+ strcpy (buf->nodename, "localhost");
+
+ /* Determine major-major Windows version. */
+ if (version.dwPlatformId == VER_PLATFORM_WIN32_NT)
+ {
+ /* Windows NT or newer. */
+ super_version = "NT";
+ }
+ else if (version.dwPlatformId == VER_PLATFORM_WIN32_CE)
+ {
+ /* Windows CE or Embedded CE. */
+ super_version = "CE";
+ }
+ else if (version.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
+ {
+ /* Windows 95/98/ME. */
+ switch (version.dwMinorVersion)
+ {
+ case 0:
+ super_version = "95";
+ break;
+ case 10:
+ super_version = "98";
+ break;
+ case 90:
+ super_version = "ME";
+ break;
+ default:
+ super_version = "";
+ break;
+ }
+ }
+ else
+ super_version = "";
+
+ /* Fill in sysname. */
+#ifdef __MINGW32__
+ /* Returns a string compatible with the MSYS uname.exe program,
+ so that no further changes are needed to GNU config.guess.
+ For example,
+ $ ./uname.exe -s => MINGW32_NT-5.1
+ */
+ sprintf (buf->sysname, "MINGW32_%s-%u.%u", super_version,
+ (unsigned int) version.dwMajorVersion,
+ (unsigned int) version.dwMinorVersion);
+#else
+ sprintf (buf->sysname, "Windows%s", super_version);
+#endif
+
+ /* Fill in release, version. */
+ /* The MSYS uname.exe programs uses strings from a modified Cygwin runtime:
+ $ ./uname.exe -r => 1.0.11(0.46/3/2)
+ $ ./uname.exe -v => 2008-08-25 23:40
+ There is no point in imitating this behaviour. */
+ if (version.dwPlatformId == VER_PLATFORM_WIN32_NT)
+ {
+ /* Windows NT or newer. */
+ struct windows_version
+ {
+ int major;
+ int minor;
+ unsigned int server_offset;
+ const char *name;
+ };
+
+ /* Storing the workstation and server version names in a single
+ stream does not waste memory when they are the same. These
+ macros abstract the representation. VERSION1 is used if
+ version.wProductType does not matter, VERSION2 if it does. */
+ #define VERSION1(major, minor, name) \
+ { major, minor, 0, name }
+ #define VERSION2(major, minor, workstation, server) \
+ { major, minor, sizeof workstation, workstation "\0" server }
+ static const struct windows_version versions[] =
+ {
+ VERSION2 (3, -1, "Windows NT Workstation", "Windows NT Server"),
+ VERSION2 (4, -1, "Windows NT Workstation", "Windows NT Server"),
+ VERSION1 (5, 0, "Windows 2000"),
+ VERSION1 (5, 1, "Windows XP"),
+ VERSION1 (5, 2, "Windows Server 2003"),
+ VERSION2 (6, 0, "Windows Vista", "Windows Server 2008"),
+ VERSION2 (6, 1, "Windows 7", "Windows Server 2008 R2"),
+ VERSION2 (-1, -1, "Windows", "Windows Server")
+ };
+ const char *base;
+ const struct windows_version *v = versions;
+
+ /* Find a version that matches ours. The last element is a
+ wildcard that always ends the loop. */
+ while ((v->major != version.dwMajorVersion && v->major != -1)
+ || (v->minor != version.dwMinorVersion && v->minor != -1))
+ v++;
+
+ if (have_versionex && versionex.wProductType != VER_NT_WORKSTATION)
+ base = v->name + v->server_offset;
+ else
+ base = v->name;
+ if (v->major == -1 || v->minor == -1)
+ sprintf (buf->release, "%s %u.%u",
+ base,
+ (unsigned int) version.dwMajorVersion,
+ (unsigned int) version.dwMinorVersion);
+ else
+ strcpy (buf->release, base);
+ }
+ else if (version.dwPlatformId == VER_PLATFORM_WIN32_CE)
+ {
+ /* Windows CE or Embedded CE. */
+ sprintf (buf->release, "Windows CE %u.%u",
+ (unsigned int) version.dwMajorVersion,
+ (unsigned int) version.dwMinorVersion);
+ }
+ else
+ {
+ /* Windows 95/98/ME. */
+ sprintf (buf->release, "Windows %s", super_version);
+ }
+ strcpy (buf->version, version.szCSDVersion);
+
+ /* Fill in machine. */
+ {
+ SYSTEM_INFO info;
+
+ GetSystemInfo (&info);
+ /* Check for Windows NT or CE, since the info.wProcessorLevel is
+ garbage on Windows 95. */
+ if (version.dwPlatformId == VER_PLATFORM_WIN32_NT
+ || version.dwPlatformId == VER_PLATFORM_WIN32_CE)
+ {
+ /* Windows NT or newer, or Windows CE or Embedded CE. */
+ switch (info.wProcessorArchitecture)
+ {
+ case PROCESSOR_ARCHITECTURE_AMD64:
+ strcpy (buf->machine, "x86_64");
+ break;
+ case PROCESSOR_ARCHITECTURE_IA64:
+ strcpy (buf->machine, "ia64");
+ break;
+ case PROCESSOR_ARCHITECTURE_INTEL:
+ strcpy (buf->machine, "i386");
+ if (info.wProcessorLevel >= 3)
+ buf->machine[1] =
+ '0' + (info.wProcessorLevel <= 6 ? info.wProcessorLevel : 6);
+ break;
+ case PROCESSOR_ARCHITECTURE_IA32_ON_WIN64:
+ strcpy (buf->machine, "i686");
+ break;
+ case PROCESSOR_ARCHITECTURE_MIPS:
+ strcpy (buf->machine, "mips");
+ break;
+ case PROCESSOR_ARCHITECTURE_ALPHA:
+ case PROCESSOR_ARCHITECTURE_ALPHA64:
+ strcpy (buf->machine, "alpha");
+ break;
+ case PROCESSOR_ARCHITECTURE_PPC:
+ strcpy (buf->machine, "powerpc");
+ break;
+ case PROCESSOR_ARCHITECTURE_SHX:
+ strcpy (buf->machine, "sh");
+ break;
+ case PROCESSOR_ARCHITECTURE_ARM:
+ strcpy (buf->machine, "arm");
+ break;
+ default:
+ strcpy (buf->machine, "unknown");
+ break;
+ }
+ }
+ else
+ {
+ /* Windows 95/98/ME. */
+ switch (info.dwProcessorType)
+ {
+ case PROCESSOR_AMD_X8664:
+ strcpy (buf->machine, "x86_64");
+ break;
+ case PROCESSOR_INTEL_IA64:
+ strcpy (buf->machine, "ia64");
+ break;
+ default:
+ if (info.dwProcessorType % 100 == 86)
+ sprintf (buf->machine, "i%u",
+ (unsigned int) info.dwProcessorType);
+ else
+ strcpy (buf->machine, "unknown");
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+#endif
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