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When DOS program executes another DOS program, command line is now

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passed correctly. If DOS command line is too long, command line is now
truncated instead of letting it trash memory.
This commit is contained in:
Jukka Heinonen 2002-05-01 18:04:11 +00:00 committed by Alexandre Julliard
parent b7b75a86ec
commit 7ec04452a1
1 changed files with 28 additions and 16 deletions
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44
dlls/winedos/module.c
View file

@ -112,22 +112,29 @@ static void MZ_CreatePSP( LPVOID lpPSP, WORD env, WORD par )
/* FIXME: more PSP stuff */
}
static void MZ_FillPSP( LPVOID lpPSP, LPCSTR cmdline )
static void MZ_FillPSP( LPVOID lpPSP, LPBYTE cmdline, int length )
{
PDB16*psp=lpPSP;
const char*cmd=cmdline?strchr(cmdline,' '):NULL;
PDB16 *psp = lpPSP;
/* copy parameters */
if (cmd) {
#if 0
/* command.com doesn't do this */
while (*cmd == ' ') cmd++;
#endif
psp->cmdLine[0]=strlen(cmd);
strcpy(psp->cmdLine+1,cmd);
psp->cmdLine[psp->cmdLine[0]+1]='\r';
} else psp->cmdLine[1]='\r';
/* FIXME: more PSP stuff */
while(length > 0 && *cmdline != ' ') {
length--;
cmdline++;
}
/* command.com does not skip over multiple spaces */
if(length > 126) {
ERR("Command line truncated! (length %d > maximum length 126)\n",
length);
length = 126;
}
psp->cmdLine[0] = length;
if(length > 0)
memmove(psp->cmdLine+1, cmdline, length);
psp->cmdLine[length+1] = '\r';
/* FIXME: more PSP stuff */
}
/* default INT 08 handler: increases timer tick counter but not much more */
@ -356,7 +363,11 @@ BOOL WINAPI MZ_Exec( CONTEXT86 *context, LPCSTR filename, BYTE func, LPVOID para
* let's work on the new values now */
LPBYTE psp_start = (LPBYTE)((DWORD)DOSVM_psp << 4);
ExecBlock *blk = (ExecBlock *)paramblk;
MZ_FillPSP(psp_start, DOSMEM_MapRealToLinear(blk->cmdline));
LPBYTE cmdline = DOSMEM_MapRealToLinear(blk->cmdline);
/* First character contains the length of the command line. */
MZ_FillPSP(psp_start, cmdline + 1, cmdline[0]);
/* the lame MS-DOS engineers decided that the return address should be in int22 */
DOSVM_SetRMHandler(0x22, (FARPROC16)MAKESEGPTR(context->SegCs, LOWORD(context->Eip)));
if (func) {
@ -462,8 +473,9 @@ static void MZ_Launch(void)
{
TDB *pTask = TASK_GetCurrent();
BYTE *psp_start = PTR_REAL_TO_LIN( DOSVM_psp, 0 );
LPSTR cmdline = GetCommandLineA();
MZ_FillPSP(psp_start, GetCommandLineA());
MZ_FillPSP(psp_start, cmdline, cmdline ? strlen(cmdline) : 0);
pTask->flags |= TDBF_WINOLDAP;
_LeaveWin16Lock();