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303 lines
7.1 KiB
303 lines
7.1 KiB
// File: NmMigrat.c
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//
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// 16-bit Windows 98 Migration DLL for NetMeeting 3.0
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#include "NmMigrat.h"
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#include "stdio.h"
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// Win98 ships with NM 2.1 build 2203 and will force it to be installed
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static const char * g_pcszInfNm = "msnetmtg.inf";
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static const char * g_pcszVersion = "; Version 4,3,0,2203";
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static const char * g_pcszHeader = ";msnetmtg.inf (removed by NmMigrat.dll)\r\n[Version]\r\nsignature=\"$CHICAGO$\"\r\nSetupClass=Base\r\nLayoutFile=layout.inf, layout1.inf, layout2.inf\r\n";
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// In Win98's subase.inf, under [winother.oldlinks] there is a bogus line
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static const char * g_pcszInfSubase = "subase.inf";
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static const char * g_pcszWinOther = "[winother.oldlinks]";
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static const char * g_pcszNukeLink = "setup.ini, groupPrograms,, \"\"\"%Old_NetMeeting_DESC%\"\"\"";
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///////////////////////////////////////////////////////////////////////
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typedef struct {
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HFILE hf; // File Handle
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LONG lPos; // current position in the file
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int ichCurr; // current character position in rgch
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int cchRemain; // number of remaining chars in rgch
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char rgch[8*1024]; // a really large buffer!
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} FD; // File Data
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///////////////////////////////////////////////////////////////////////
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// Debug Utilities
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#ifdef DEBUG
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VOID ErrMsg2(LPCSTR pszFormat, LPVOID p1, LPVOID p2)
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{
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char szMsg[1024];
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OutputDebugString("NmMigration: ");
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wsprintf(szMsg, pszFormat, p1, p2);
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OutputDebugString(szMsg);
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OutputDebugString("\r\n");
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}
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VOID ErrMsg1(LPCSTR pszFormat, LPVOID p1)
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{
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ErrMsg2(pszFormat, p1, NULL);
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}
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#else
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#define ErrMsg1(psz, p1)
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#define ErrMsg2(psz, p1, p2)
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#endif /* DEBUG */
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///////////////////////////////////////////////////////////////////////
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/* L I B M A I N */
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/*-------------------------------------------------------------------------
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%%Function: LibMain
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-------------------------------------------------------------------------*/
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int FAR PASCAL LibMain(HANDLE hInst, WORD wDataseg, WORD wHeapsize, LPSTR lpszcmdl)
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{
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Reference(hInst);
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Reference(wDataseg);
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Reference(wHeapsize);
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Reference(lpszcmdl);
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return 1;
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}
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/* F O P E N F I L E */
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/*-------------------------------------------------------------------------
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%%Function: FOpenFile
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Open the file from the temporary Win98 INF directory.
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-------------------------------------------------------------------------*/
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BOOL FOpenFile(LPCSTR pszFile, FD * pFd, BOOL fCreate)
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{
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char szPath[MAX_PATH];
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// LDID_SETUPTEMP = temp INF directory "C:\WININST0.400"
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UINT retVal = CtlGetLddPath(LDID_SETUPTEMP, szPath);
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if (0 != retVal)
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{
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ErrMsg1("CtlGetLddPath(TEMP) failed. Err=%d", (LPVOID) retVal);
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return FALSE;
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}
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// Nuke the temporary 2.1 inf so it doesn't get installed
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lstrcat(szPath, "\\");
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lstrcat(szPath, pszFile);
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if (fCreate)
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{
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pFd->hf = _lcreat(szPath, 0); // read/write
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}
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else
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{
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pFd->hf = _lopen(szPath, OF_READWRITE);
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}
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if (HFILE_ERROR == pFd->hf)
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{
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ErrMsg2("Unable to open [%s] Error=%d", szPath, (LPVOID) GetLastError());
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return FALSE;
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}
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pFd->lPos = 0;
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pFd->ichCurr = 0;
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pFd->cchRemain = 0;
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ErrMsg1("Opened [%s]", szPath);
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return TRUE;
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}
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/* R E A D L I N E */
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/*-------------------------------------------------------------------------
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%%Function: ReadLine
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Read a line (up to MAX_PATH chars) from the buffered file.
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Returns the number of characters read.
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-------------------------------------------------------------------------*/
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int ReadLine(char * pchDest, FD * pFd)
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{
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int cch;
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for (cch = 0; cch < MAX_PATH; cch++)
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{
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if (0 == pFd->cchRemain)
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{
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pFd->cchRemain = _lread(pFd->hf, pFd->rgch, sizeof(pFd->rgch));
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if (HFILE_ERROR == pFd->cchRemain)
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{
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ErrMsg1("End of file reached at pos=%d", (LPVOID) pFd->lPos);
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break;
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}
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pFd->ichCurr = 0;
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}
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pFd->lPos++;
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pFd->cchRemain--;
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*pchDest = pFd->rgch[pFd->ichCurr++];
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if ('\n' == *pchDest)
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{
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break;
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}
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if ('\r' != *pchDest)
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{
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pchDest++;
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}
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}
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*pchDest = '\0'; // Always null terminate the string
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return cch;
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}
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/* R E M O V E I N F */
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/*-------------------------------------------------------------------------
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%%Function: RemoveInf
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Remove the NM2.1 inf from Win98's list of inf's
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-------------------------------------------------------------------------*/
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void RemoveInf(void)
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{
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FD fd;
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if (!FOpenFile(g_pcszInfNm, &fd, FALSE))
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{
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return;
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}
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for ( ; ; ) // Find the version comment before the first section
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{
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char szLine[MAX_PATH];
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if (0 == ReadLine(szLine, &fd))
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{
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break;
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}
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if ('[' == szLine[0])
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{
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ErrMsg1("No version number found?", 0);
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break;
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}
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// Must match build 2203 since a Win98 update or an OEM
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// could ship a newer version than NM 2.11, which we would
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// want to upgrade us.
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if (0 == lstrcmp(szLine, g_pcszVersion))
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{
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// Re-write the older MSNETMTG.INF with a empty header
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_lclose(fd.hf);
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if (FOpenFile(g_pcszInfNm, &fd, TRUE))
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{
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_llseek(fd.hf, 0, 0);
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_lwrite(fd.hf, (LPCSTR) g_pcszHeader, lstrlen(g_pcszHeader)+1);
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ErrMsg1("Removed older NetMeeting INF", 0);
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}
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break;
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}
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}
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_lclose(fd.hf);
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}
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/* F I X S U B A S E */
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/*-------------------------------------------------------------------------
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%%Function: FixSubase
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Delete the line from subase.inf that deletes the NetMeeting link.
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See NM4DB bug 5937, Win98 bug 65154.
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This code shouldn't be necessary with Win98 SP1 and later.
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-------------------------------------------------------------------------*/
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void FixSubase(void)
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{
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FD fd;
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char szLine[MAX_PATH];
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if (!FOpenFile(g_pcszInfSubase, &fd, FALSE))
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return;
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for ( ; ; ) // Find the section
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{
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if (0 == ReadLine(szLine, &fd))
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{
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break;
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}
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if (('[' == szLine[0]) && (0 == lstrcmp(szLine, g_pcszWinOther)))
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{
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ErrMsg1("Found the section at pos=%d", (LPVOID) fd.lPos);
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break;
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}
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}
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for ( ; ; ) // Find the line
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{
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LONG lPosPrev = fd.lPos; // Remember the start of the line
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if (0 == ReadLine(szLine, &fd))
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{
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break;
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}
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if (0 == lstrcmp(szLine, g_pcszNukeLink))
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{
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// comment out the line
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_llseek(fd.hf, lPosPrev, 0 /* FILE_BEGIN */);
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_lwrite(fd.hf, (LPCSTR) ";", 1);
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ErrMsg1("Commented out line at pos=%d", (LPVOID) lPosPrev);
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break;
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}
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if ('[' == szLine[0])
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{
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ErrMsg1("End of section? at pos=%d", (LPVOID) lPosPrev);
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break;
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}
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}
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_lclose(fd.hf);
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}
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/* N M M I G R A T I O N */
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/*-------------------------------------------------------------------------
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%%Function: NmMigration
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This is called by the Windows 98 setup system.
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-------------------------------------------------------------------------*/
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DWORD FAR PASCAL NmMigration(DWORD dwStage, LPSTR lpszParams, LPARAM lParam)
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{
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Reference(lpszParams);
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Reference(lParam);
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ErrMsg2("NM Build=[%s] stage=%08X", lpszParams, (LPVOID) dwStage);
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switch (dwStage)
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{
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case SU_MIGRATE_PREINFLOAD:
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{
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RemoveInf();
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FixSubase();
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break;
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}
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default:
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break;
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}
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return 0;
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}
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