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FCB (int 21h func 29h): should keep parsing name even if drive letter invalid

This commit is contained in:
tkchia 2022-07-15 09:10:54 +00:00 committed by Kenneth J Davis
parent 0e6d90cf82
commit 031f17068a
1 changed files with 12 additions and 7 deletions
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19
kernel/fcbfns.c
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@ -90,7 +90,7 @@ BYTE FAR *FatGetDrvData(UBYTE drive, UBYTE * pspc, UWORD * bps, UWORD * nc)
#ifndef IPL
UWORD FcbParseFname(UBYTE *wTestMode, const BYTE FAR * lpFileName, fcb FAR * lpFcb)
{
WORD wRetCodeName = FALSE, wRetCodeExt = FALSE;
WORD wRetCodeDrive = FALSE, wRetCodeName = FALSE, wRetCodeExt = FALSE;
/* pjv -- ExtFcbToFcb? */
@ -105,18 +105,18 @@ UWORD FcbParseFname(UBYTE *wTestMode, const BYTE FAR * lpFileName, fcb FAR * lpF
lpFileName = ParseSkipWh(lpFileName);
/* Now check for drive specification */
/* If drive specified, set to it (when valid) otherwise */
/* If drive specified, set to it otherwise */
/* set to default drive unless leave as-is requested */
/* Undocumented behavior: should keep parsing even if drive */
/* specification is invalid -- tkchia 20220715 */
if (*(lpFileName + 1) == ':')
{
/* non-portable construct to be changed */
REG UBYTE Drive = DosUpFChar(*lpFileName) - 'A';
if (get_cds(Drive) == NULL)
{
*wTestMode = PARSE_RET_BADDRIVE;
return FP_OFF(lpFileName);
}
wRetCodeDrive = TRUE;
lpFcb->fcb_drive = Drive + 1;
lpFileName += 2;
@ -163,7 +163,12 @@ UWORD FcbParseFname(UBYTE *wTestMode, const BYTE FAR * lpFileName, fcb FAR * lpF
GetNameField(++lpFileName, (BYTE FAR *) lpFcb->fcb_fext,
FEXT_SIZE, (BOOL *) & wRetCodeExt);
*wTestMode = (wRetCodeName | wRetCodeExt) ? PARSE_RET_WILD : PARSE_RET_NOWILD;
if (wRetCodeDrive)
*wTestMode = PARSE_RET_BADDRIVE;
else if (wRetCodeName | wRetCodeExt)
*wTestMode = PARSE_RET_WILD;
else
*wTestMode = PARSE_RET_NOWILD;
return FP_OFF(lpFileName);
}