reactos/base/applications/cmdutils/help/help.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS help utility
   4  * FILE:            base/applications/cmdutils/help/help.c
   5  * PURPOSE:         Provide help for command-line utilities
   6  * PROGRAMMERS:     Lee Schroeder (spaceseel at gmail dot com)
   7  *                  Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   8  */
   9
  10 #include <stdlib.h>
  11
  12 #define WIN32_NO_STATUS
  13 #include <windef.h>
  14 #include <winbase.h>
  15
  16 #include <strsafe.h>
  17
  18 #include <conutils.h>
  19
  20 #include "help.h"
  21 #include "resource.h"
  22
  23 static BOOL
  24 IsInternalCommand(PCWSTR Cmd)
  25 {
  26     size_t i;
  27     int res;
  28
  29     /* Invalid command */
  30     if (!Cmd) return FALSE;
  31
  32     for (i = 0; i < ARRAYSIZE(InternalCommands); ++i)
  33     {
  34         res = _wcsicmp(InternalCommands[i], Cmd);
  35         if (res == 0)
  36         {
  37             /* This is an internal command */
  38             return TRUE;
  39         }
  40         else if (res > 0)
  41         {
  42             /*
  43              * The internal commands list is sorted in alphabetical order.
  44              * We can quit the loop immediately since the current internal
  45              * command is lexically greater than the command to be tested.
  46              */
  47             break;
  48         }
  49     }
  50
  51     /* Command not found */
  52     return FALSE;
  53 }
  54
  55 int wmain(int argc, WCHAR* argv[])
  56 {
  57     WCHAR CmdLine[CMDLINE_LENGTH];
  58
  59     /* Initialize the Console Standard Streams */
  60     ConInitStdStreams();
  61
  62     /*
  63      * If the user hasn't asked for specific help,
  64      * then print out the list of available commands.
  65      */
  66     if (argc <= 1)
  67     {
  68         ConResPuts(StdOut, IDS_HELP1);
  69         ConResPuts(StdOut, IDS_HELP2);
  70         return 0;
  71     }
  72
  73     /*
  74      * Bad usage (too much options) or we use the /? switch.
  75      * Display help for the HELP command.
  76      */
  77     if ((argc > 2) || (wcscmp(argv[1], L"/?") == 0))
  78     {
  79         ConResPuts(StdOut, IDS_USAGE);
  80         return 0;
  81     }
  82
  83     /*
  84      * If the command is not an internal one,
  85      * display an information message and exit.
  86      */
  87     if (!IsInternalCommand(argv[1]))
  88     {
  89         ConResPrintf(StdOut, IDS_NO_ENTRY, argv[1]);
  90         return 0;
  91     }
  92
  93     /*
  94      * Run "<command> /?" in the current command processor.
  95      */
  96     StringCbPrintfW(CmdLine, sizeof(CmdLine), L"%ls /?", argv[1]);
  97
  98     _flushall();
  99     return _wsystem(CmdLine);
 100 }
 101
 102 /* EOF */