565 lines
14 KiB
C
565 lines
14 KiB
C
/*++
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Copyright (c) 1998 Microsoft Corporation
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Module Name:
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dispatch.c
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Abstract:
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This module implements the basic command dispatcher.
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Author:
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Wesley Witt (wesw) 21-Oct-1998
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Revision History:
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--*/
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#include "cmdcons.h"
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#pragma hdrstop
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ULONG
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RcCmdDoHelp(
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IN PTOKENIZED_LINE TokenizedLine
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);
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ULONG
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RcCmdDoExit(
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IN PTOKENIZED_LINE TokenizedLine
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);
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RC_CMD Commands[] = {
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{ L"ATTRIB", RcCmdAttrib, 1, 2, 0, TRUE },
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{ L"BATCH", RcCmdBatch, 1, 2, 0, TRUE },
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#if !defined(_DONT_HAVE_BOOTCFG_TESTERS_)
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#if defined(_X86_)
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{ L"BOOTCFG", RcCmdBootCfg, 0,-1, 0, TRUE },
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#endif
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#endif
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{ L"CD", RcCmdChdir, 0, 1, 0, TRUE },
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{ L"CHDIR", RcCmdChdir, 0, 1, 0, TRUE },
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{ L"CHKDSK", RcCmdChkdsk, 0,-1, 0, TRUE },
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{ L"CLS", RcCmdCls, 0, 1, 0, TRUE },
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{ L"COPY", RcCmdCopy, 1, 2, 0, TRUE },
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{ L"DEL", RcCmdDelete, 1, 1, 0, TRUE },
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{ L"DELETE", RcCmdDelete, 1, 1, 0, TRUE },
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{ L"DIR", RcCmdDir, 0, 1, 0, TRUE },
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{ L"DISABLE", RcCmdDisableService, 0,-1, 0, TRUE },
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{ L"DISKPART", RcCmdFdisk, 0, 3, 0, TRUE },
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{ L"ENABLE", RcCmdEnableService, 0,-1, 0, TRUE },
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{ L"ERASE", RcCmdDelete, 1, 1, 1, TRUE },
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{ L"EXIT", RcCmdDoExit, 0, 1, 0, TRUE },
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{ L"EXPAND", RcCmdExpand, 1,-1, 0, TRUE },
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{ L"FIXBOOT", RcCmdFixBootSect, 0, 1, 0, TRUE },
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{ L"FIXMBR", RcCmdFixMBR, 0, 1, 0, TRUE },
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{ L"FORMAT", RcCmdFormat, 1, 3, 0, TRUE },
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{ L"HELP", RcCmdDoHelp, 0, 1, 0, TRUE },
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{ L"LISTSVC", RcCmdListSvc, 0, 1, 0, TRUE },
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{ L"LOGON", RcCmdLogon, 0, 3, 0, TRUE },
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{ L"MAP", RcCmdDriveMap, 0, 1, 0, TRUE },
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{ L"MD", RcCmdMkdir, 1, 1, 0, TRUE },
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{ L"MKDIR", RcCmdMkdir, 1, 1, 0, TRUE },
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{ L"MKDISKRAW", RcCmdMakeDiskRaw, 1, 1, 1, TRUE },
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{ L"MORE", RcCmdType, 1, 1, 0, TRUE },
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// If you change the command from NET, change it in RcHideNetCommands().
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{ L"NET", RcCmdNet, 1, 5, 0, TRUE },
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{ L"RD", RcCmdRmdir, 1, 1, 0, TRUE },
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{ L"REN", RcCmdRename, 1, 2, 0, TRUE },
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{ L"RENAME", RcCmdRename, 1, 2, 0, TRUE },
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#if 0
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{ L"REPAIR", RcCmdRepair, 1, 5, 0, TRUE },
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#endif
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{ L"RMDIR", RcCmdRmdir, 1, 1, 0, TRUE },
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{ L"SET", RcCmdSetFlags, 0, 3, 1, TRUE },
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{ L"SYSTEMROOT", RcCmdSystemRoot, 0, 1, 0, TRUE },
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{ L"TYPE", RcCmdType, 1, 1, 0, TRUE },
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{ L"VERIFIER", RcCmdVerifier, 0,-1, 1, TRUE },
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{ L"/?", RcCmdHelpHelp, 0, 1, 1, TRUE },
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{ L"?", RcCmdHelpHelp, 0, 1, 1, TRUE }
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};
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#define NUM_CMDS (sizeof(Commands)/sizeof(Commands[0]))
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//
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// Special case: exit and reload
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//
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#define EXIT_COMMAND_NAME L"EXIT"
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#define RELOAD_COMMAND_NAME L"RELOAD"
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#define HELP_COMMAND_NAME L"HELP"
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// prototype
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ULONG
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GetStringTokenFromLine(
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IN OUT LPWSTR *Start,
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OUT LPWSTR Output OPTIONAL
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);
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PTOKENIZED_LINE
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RcTokenizeLine(
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IN LPWSTR Line
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)
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{
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ULONG len;
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WCHAR *p,*q;
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PTOKENIZED_LINE TokenizedLine;
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PLINE_TOKEN LineToken,PrevToken;
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//
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// Strip trailing space off the command.
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//
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len = wcslen(Line);
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while(len && RcIsSpace(Line[len-1])) {
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Line[--len] = 0;
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}
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//
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// Allocate and initialize a tokenized line structure.
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//
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TokenizedLine = SpMemAlloc(sizeof(TOKENIZED_LINE));
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RtlZeroMemory(TokenizedLine,sizeof(TOKENIZED_LINE));
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//
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// Now we go into a loop of skipping leading space and parsing in
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// the actual tokens.
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//
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PrevToken = NULL;
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p = Line;
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while(*p) {
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//
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// Skip leading space. Because we trimmed off trailing space,
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// we should never hit the end of the line before finding a
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// non-space character.
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//
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while(RcIsSpace(*p)) {
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p++;
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}
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ASSERT(*p);
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//
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// Allocate a line token structure for this string.
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//
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LineToken = SpMemAlloc(sizeof(LINE_TOKEN));
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RtlZeroMemory(LineToken,sizeof(LINE_TOKEN));
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//
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// Now we've got a string. First we make one pass over it
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// to determine the length, then allocate a buffer and
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// pull out the string into it.
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//
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q = p;
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len = GetStringTokenFromLine(&q,NULL);
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LineToken->String = SpMemAlloc((len+1)*sizeof(WCHAR));
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GetStringTokenFromLine(&p,LineToken->String);
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if(PrevToken) {
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PrevToken->Next = LineToken;
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} else {
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TokenizedLine->Tokens = LineToken;
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}
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PrevToken = LineToken;
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TokenizedLine->TokenCount++;
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}
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return(TokenizedLine);
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}
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ULONG
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GetStringTokenFromLine(
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IN OUT LPWSTR *Start,
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OUT LPWSTR Output OPTIONAL
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)
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{
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WCHAR *p;
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ULONG len;
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BOOLEAN InQuote;
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len = 0;
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InQuote = FALSE;
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p = *Start;
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while(*p) {
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if(RcIsSpace(*p) && !InQuote) {
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//
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// Done.
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//
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break;
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}
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if(*p == L'\"') {
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InQuote = (BOOLEAN)(!InQuote);
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} else {
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if(Output) {
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Output[len] = *p;
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}
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len++;
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}
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p++;
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}
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if(Output) {
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Output[len] = 0;
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}
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*Start = p;
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return(len);
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}
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VOID
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RcFreeTokenizedLine(
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IN OUT PTOKENIZED_LINE *TokenizedLine
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)
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{
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PTOKENIZED_LINE p;
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PLINE_TOKEN q,n;
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p = *TokenizedLine;
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*TokenizedLine = NULL;
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q = p->Tokens;
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while(q) {
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n = q->Next;
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SpMemFree((PVOID)q->String);
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SpMemFree(q);
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q = n;
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}
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SpMemFree(p);
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}
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ULONG
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RcDispatchCommand(
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IN PTOKENIZED_LINE TokenizedLine
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)
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/*++
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Routine Description:
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Top-level routine for dispatching a command.
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Arguments:
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Return Value:
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--*/
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{
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unsigned i;
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unsigned count;
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ASSERT(TokenizedLine->TokenCount);
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if(!TokenizedLine->TokenCount) {
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return(1);
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}
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/*
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//
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// Special case exit right up front.
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//
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if(!_wcsicmp(TokenizedLine->Tokens->String,EXIT_COMMAND_NAME)) {
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if (TokenizedLine->TokenCount > 1) {
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RcMessageOut(MSG_EXIT_HELP);
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return(1);
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}
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return(0);
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}
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*/
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if(!_wcsicmp(TokenizedLine->Tokens->String,RELOAD_COMMAND_NAME)) {
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return(2);
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}
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/*
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if(!_wcsicmp(TokenizedLine->Tokens->String,HELP_COMMAND_NAME)) {
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if( RcCmdDoHelp(TokenizedLine) ) {
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// if we got a 1, then the user just wanted a help index
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// otherwise we want to drop down and let the regular command
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// processing path handle a /? parameter.
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return(1);
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}
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}
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*/
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//
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// See whether it's a drive designation.
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//
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if(RcIsAlpha(TokenizedLine->Tokens->String[0])
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&& (TokenizedLine->Tokens->String[1] == L':')
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&& (TokenizedLine->Tokens->String[2] == 0)) {
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RcCmdSwitchDrives(TokenizedLine->Tokens->String[0]);
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return(1);
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}
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//
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// Attempt to locate the command in our table.
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//
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for(i=0; i<NUM_CMDS; i++) {
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if(Commands[i].Enabled && !_wcsicmp(TokenizedLine->Tokens->String,Commands[i].Name)) {
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//
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// Validate arg count.
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//
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count = TokenizedLine->TokenCount - 1;
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if((count < Commands[i].MinimumArgCount)
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|| (count > Commands[i].MaximumArgCount)) {
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RcMessageOut(MSG_SYNTAX_ERROR);
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} else {
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return Commands[i].Routine(TokenizedLine);
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}
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return(1);
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}
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}
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RcMessageOut(MSG_UNKNOWN_COMMAND);
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return(1);
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}
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ULONG
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RcCmdDoExit(
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IN PTOKENIZED_LINE TokenizedLine
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)
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/*++
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Routine Description:
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Exit command routine
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Arguments:
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Tokens for the command
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Return Value:
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1 if some error was found or help was asked for.
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0 if we need to exit
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--*/
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{
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ULONG uResult = 0; // will exit
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if (RcCmdParseHelp( TokenizedLine, MSG_EXIT_HELP ))
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uResult = 1; // will not exit
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return uResult;
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}
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ULONG
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RcCmdDoHelp(
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IN PTOKENIZED_LINE TokenizedLine
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)
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/*++
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Routine Description:
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Help command routine
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Arguments:
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Tokens for the command
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Return Value:
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1 if some error was found or help was requested.
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When help was reqeusted for a particular command
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the dispatched command's return value with "/?" as argument for
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the command
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--*/
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{
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ULONG uResult = 1;
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int i;
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PLINE_TOKEN Token;
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if (!RcCmdParseHelp( TokenizedLine, MSG_HELPCOMMAND_HELP )) {
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if (TokenizedLine->TokenCount == 2) {
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// we assume that the user is typing HELP <command>.
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// we simply reverse the two tokens, getting <command> HELP
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// and overwrite HELP with /? [which fits since HELP is four chars long]
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// we then return a 0, which causes the dispatcher to drop into
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// the normal command processing path
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Token = TokenizedLine->Tokens;
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TokenizedLine->Tokens = TokenizedLine->Tokens->Next;
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TokenizedLine->Tokens->Next = Token;
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Token->Next = NULL;
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wcscpy( Token->String, L"/?" );
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uResult = RcDispatchCommand( TokenizedLine );
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} else {
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pRcEnableMoreMode();
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RcMessageOut( MSG_HELPCOMMAND_HELP );
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for( i=0; i < NUM_CMDS; i++ ) {
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if (Commands[i].Hidden == 0) {
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RcTextOut( Commands[i].Name );
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RcTextOut( L"\r\n" );
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}
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}
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pRcDisableMoreMode();
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}
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}
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return uResult;
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}
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/*++
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Routine Description:
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Enables or disables the SET command
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Note : we avoid using direct SET command index
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into Commands array so that if some one changes
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the Commands array this routine still works
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Arguments:
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bEnable - BOOLEAN inidicating whether to enable or disable
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the set command
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Return Value:
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None
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--*/
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VOID
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RcSetSETCommandStatus(
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BOOLEAN bEnabled
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)
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{
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int iIndex;
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int cElements = sizeof(Commands) / sizeof(RC_CMD);
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WCHAR *szSetCmdName = L"SET";
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//
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// search through the dispatch table and trun on the
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// help flag. This flag will indicate whether the set
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// command is enabled or not
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//
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for(iIndex = 0; iIndex < cElements; iIndex++) {
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if ( !wcscmp(Commands[iIndex].Name, szSetCmdName) ) {
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Commands[iIndex].Hidden = bEnabled ? 0 : 1;
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break;
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}
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}
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}
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/*++
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Routine Description:
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Returns the SET command status
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Note : we avoid using direct SET command index
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into Commands array so that if some one changes
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the Commands array this routine still works
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Arguments:
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None
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Return Value:
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BOOLEAN inidicating whether the SET command is
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enabled or disabled.
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--*/
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BOOLEAN
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RcGetSETCommandStatus(
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VOID
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)
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{
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BOOLEAN bEnabled = FALSE;
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int iIndex;
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int cElements = sizeof(Commands) / sizeof(RC_CMD);
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WCHAR *szSetCmdName = L"SET";
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//
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// search through the dispatch table and trun on the
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// help flag. This flag will indicate whether the set
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// command is enabled or not
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//
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for(iIndex = 0; iIndex < cElements; iIndex++) {
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if ( !wcscmp(Commands[iIndex].Name, szSetCmdName) ) {
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bEnabled = (Commands[iIndex].Hidden == 0);
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break;
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}
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}
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return bEnabled;
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}
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BOOLEAN
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RcDisableCommand(
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IN PRC_CMD_ROUTINE CmdToDisable
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)
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/*++
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Routine Description:
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Disables the specified command and hides it.
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Arguments:
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CmdToDisable - Command Routine to disable
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Return Value:
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BOOLEAN inidicating whether the command was disabled or not.
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--*/
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{
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ULONG Index;
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ULONG NumCmds;
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BOOLEAN Result = FALSE;
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if (CmdToDisable) {
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NumCmds = sizeof(Commands) / sizeof(RC_CMD);
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for (Index=0; Index < NumCmds; Index++) {
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//
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// Note : Search the whole table as there might
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// be aliases for the same command
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//
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if (CmdToDisable == Commands[Index].Routine) {
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Commands[Index].Hidden = TRUE;
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Commands[Index].Enabled = FALSE;
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Result = TRUE;
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}
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}
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}
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return Result;
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}
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VOID
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RcHideNetCommands(
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VOID
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)
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{
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ULONG i;
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for( i=0; i < NUM_CMDS; i++ ) {
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if (wcscmp(Commands[i].Name, L"NET")) {
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Commands[i].Hidden = 0;
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}
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}
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}
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