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a20a359f07
In particular:
- `IDS_NOSET`: When the user tries `hostname -s ...`, tell them that for
changing the computer host's name, one has to go in the "Computer Name"
tab in the "System" control panel applet.
NOTE: You may observe that Windows' hostname says instead,
"Use the Network Control Panel Applet to set hostname."
This piece of information is wrong since Windows 2000. Indeed:
* From NT 3.1 to NT 4, one had to change the host's name via the
"Network" control panel applet; the message was accurate back then.
* Since Windows 2000, one changes the computer's host name via the
"Network Identification" (Win2000) / "Computer Name" (WinXP and above)
tab of the "System" properties Control Panel applet.
* In addition, the ony "Network" feature in the Control Panel is the
"Network Connections" special folder and doesn't deal with the host name.
- Use the ConUtils library for uniform output (on console or redirected)
of localized string resources/messages. Supersedes PR #8739.
- Improve output of last-errors by showing their description, only
falling back to showing the error number if no description exists.
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/*
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* PROJECT: ReactOS Hostname Command
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* LICENSE: LGPL-2.1-or-later (https://spdx.org/licenses/LGPL-2.1-or-later)
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* PURPOSE: Retrieves the current DNS host name of the computer.
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* COPYRIGHT: Copyright 2005 Emanuele Aliberti <ea@reactos.com>
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* Copyright 2019-2026 Hermès Bélusca-Maïto <hermes.belusca-maito@reactos.org>
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <windef.h>
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#include <winbase.h>
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#include <conutils.h>
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#include "resource.h"
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static VOID
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PrintError(
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_In_opt_ PCWSTR Message,
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_In_ DWORD dwError)
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{
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INT Len;
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if (dwError == ERROR_SUCCESS)
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return;
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if (IS_INTRESOURCE(Message))
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ConResPuts(StdErr, PtrToUlong(Message));
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else // if (Message)
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ConPuts(StdErr, Message);
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Len = ConMsgPuts(StdErr, FORMAT_MESSAGE_FROM_SYSTEM,
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NULL, dwError, LANG_USER_DEFAULT);
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if (Len <= 0) /* Fall back in case the error is not defined */
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ConPrintf(StdErr, L"%lu\n", dwError);
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}
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int wmain(int argc, WCHAR* argv[])
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{
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/* Initialize the Console Standard Streams */
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ConInitStdStreams();
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if (argc == 1)
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{
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BOOL bSuccess;
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WCHAR LocalHostName[256] = L""; // MAX_COMPUTERNAME_LENGTH + 1 for NetBIOS name.
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DWORD HostNameSize = _countof(LocalHostName);
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PWSTR HostName = LocalHostName;
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/* Try to retrieve the host name using the local buffer */
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bSuccess = GetComputerNameExW(ComputerNameDnsHostname, HostName, &HostNameSize);
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if (!bSuccess && (GetLastError() == ERROR_MORE_DATA))
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{
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/* Retry with a larger buffer since the local buffer was too small */
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HostName = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, HostNameSize * sizeof(WCHAR));
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if (HostName)
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bSuccess = GetComputerNameExW(ComputerNameDnsHostname, HostName, &HostNameSize);
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}
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/* Print out the host name */
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if (bSuccess)
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ConPrintf(StdOut, L"%s\n", HostName);
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/* If a larger buffer has been allocated, free it */
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if (HostName && (HostName != LocalHostName))
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HeapFree(GetProcessHeap(), 0, HostName);
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if (!bSuccess)
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{
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/* Fail in case of error */
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PrintError(MAKEINTRESOURCEW(IDS_ERROR), GetLastError());
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return 1;
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}
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}
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else
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{
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if ((_wcsicmp(argv[1], L"-s") == 0) || (_wcsicmp(argv[1], L"/s") == 0))
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{
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/* The program doesn't allow the user to set the host name */
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ConResPuts(StdErr, IDS_NOSET);
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return 1;
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}
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else
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{
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/* Let the user know what the program does */
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ConResPuts(StdOut, IDS_USAGE);
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}
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}
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return 0;
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}
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/* EOF */
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