159 lines
4.2 KiB
C
159 lines
4.2 KiB
C
/*
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* Hostname display utility
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*
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* Copyright 2008 Andrew Riedi
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* Copyright 2010-2011 Andrew Nguyen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.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 <wincon.h>
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#include <winnls.h>
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#include <winuser.h>
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#include "hostname.h"
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static int hostname_vprintfW(const WCHAR *msg, __ms_va_list va_args)
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{
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int wlen;
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DWORD count, ret;
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WCHAR msg_buffer[8192];
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wlen = vswprintf(msg_buffer, ARRAY_SIZE(msg_buffer), msg, va_args);
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ret = WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE), msg_buffer, wlen, &count, NULL);
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if (!ret)
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{
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DWORD len;
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char *msgA;
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/* On Windows WriteConsoleW() fails if the output is redirected. So fall
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* back to WriteFile(), assuming the console encoding is still the right
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* one in that case.
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*/
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len = WideCharToMultiByte(GetConsoleOutputCP(), 0, msg_buffer, wlen,
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NULL, 0, NULL, NULL);
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msgA = HeapAlloc(GetProcessHeap(), 0, len);
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if (!msgA)
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return 0;
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WideCharToMultiByte(GetConsoleOutputCP(), 0, msg_buffer, wlen, msgA, len,
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NULL, NULL);
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WriteFile(GetStdHandle(STD_OUTPUT_HANDLE), msgA, len, &count, FALSE);
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HeapFree(GetProcessHeap(), 0, msgA);
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}
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return count;
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}
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static int WINAPIV hostname_printfW(const WCHAR *msg, ...)
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{
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__ms_va_list va_args;
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int len;
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__ms_va_start(va_args, msg);
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len = hostname_vprintfW(msg, va_args);
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__ms_va_end(va_args);
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return len;
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}
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static int WINAPIV hostname_message_printfW(int msg, ...)
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{
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__ms_va_list va_args;
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WCHAR msg_buffer[8192];
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int len;
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LoadStringW(GetModuleHandleW(NULL), msg, msg_buffer, ARRAY_SIZE(msg_buffer));
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__ms_va_start(va_args, msg);
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len = hostname_vprintfW(msg_buffer, va_args);
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__ms_va_end(va_args);
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return len;
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}
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static int hostname_message(int msg)
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{
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WCHAR msg_buffer[8192];
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LoadStringW(GetModuleHandleW(NULL), msg, msg_buffer, ARRAY_SIZE(msg_buffer));
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return hostname_printfW(L"%s", msg_buffer);
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}
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static int display_computer_name(void)
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{
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WCHAR name[MAX_COMPUTERNAME_LENGTH + 1];
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DWORD size = ARRAY_SIZE(name);
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BOOL ret;
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ret = GetComputerNameW(name, &size);
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if (!ret)
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{
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hostname_message_printfW(STRING_CANNOT_GET_HOSTNAME, GetLastError());
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return 1;
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}
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hostname_printfW(L"%s\r\n", name);
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return 0;
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}
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int __cdecl wmain(int argc, WCHAR *argv[])
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{
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if (argc > 1)
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{
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unsigned int i;
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if (!wcsncmp(argv[1], L"/?", ARRAY_SIZE(L"/?") - 1))
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{
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hostname_message(STRING_USAGE);
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return 1;
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}
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for (i = 1; i < argc; i++)
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{
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if (argv[i][0] == '-')
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{
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switch (argv[i][1])
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{
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case 's':
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/* Ignore the option and continue processing. */
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break;
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case '?':
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hostname_message(STRING_USAGE);
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return 1;
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default:
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hostname_message_printfW(STRING_INVALID_OPTION, argv[i][1]);
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hostname_message(STRING_USAGE);
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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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hostname_message(STRING_CANNOT_SET_HOSTNAME);
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hostname_message(STRING_USAGE);
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return 1;
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}
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}
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}
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return display_computer_name();
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}
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