static struct device_info *info_device_ioctl (int unitnum, struct device_info *di, int dummy1, int dummy2)
{
DEBUG_LOG ("SCSIDEV: unit = %d: info_device_ioctl\n", unitnum);
if (unitnum < total_drives) {
struct scsidevdata *sdd = &drives[unitnum];
media_check (sdd);
di->bus = 0;
di->target = unitnum;
di->lun = 0;
di->media_inserted = media_check (sdd);
di->write_protected = 1;
di->bytespersector = 2048;
di->cylinders = 1;
di->type = INQ_ROMD; /* We only support CD/DVD drives for now */
di->unitnum = unitnum + 1;
/* TODO: Create a more informative device label */
sprintf (di->label, "[%s]", sdd->name);
} else {
di = 0;
}
return di;
}
VOID FatGetDrvData(COUNT drive, COUNT FAR * spc, COUNT FAR * bps,
COUNT FAR * nc, BYTE FAR ** mdp)
{
struct dpb *dpbp;
printf("FGDD\n");
/* first check for valid drive */
if (drive < 0 || drive > NDEVS)
{
*spc = -1;
return;
}
/* next - "log" in the drive */
drive = (drive == 0 ? default_drive : drive - 1);
dpbp = (struct dpb *)CDSp->cds_table[drive].cdsDpb;
dpbp->dpb_flags = -1;
if ((media_check(dpbp) < 0))
{
*spc = -1;
return;
}
/* get the data vailable from dpb */
*nc = dpbp->dpb_size;
*spc = dpbp->dpb_clsmask + 1;
*bps = dpbp->dpb_secsize;
/* Point to the media desctriptor fotr this drive */
*mdp = &(dpbp->dpb_mdb);
}
COUNT DosChangeDir(BYTE FAR * s)
{
REG struct dpb *dpbp;
REG struct cds FAR *cdsp;
REG COUNT drive;
struct f_node FAR *fp;
COUNT ret;
/* Parse and extract drive */
if (*(s + 1) == ':')
{
drive = *s - '@';
if (drive > 26)
drive -= 'a' - 'A';
}
else
drive = 0;
/* next - "log" in the drive */
drive = (drive == 0 ? default_drive : drive - 1);
cdsp = &CDSp->cds_table[drive];
current_ldt = cdsp;
if (cdsp->cdsFlags & 0x8000)
{
ret = dos_cd(cdsp, s);
return ret;
}
/* first check for valid drive */
if (cdsp->cdsDpb == 0)
return DE_INVLDDRV;
/* test for path existance from fs */
if ((fp = dir_open((BYTE FAR *) s)) == (struct f_node FAR *)0)
return DE_PATHNOTFND;
else
dir_close(fp);
/* if (drive < 0 || drive > nblkdev)
return DE_INVLDDRV; */
dpbp = (struct dpb *)cdsp->cdsDpb;
if ((media_check(dpbp) < 0))
return DE_INVLDDRV;
/* now get fs to change to new */
/* directory */
ret = dos_cd(cdsp, s);
return ret;
}
VOID DosGetFree(COUNT drive, COUNT FAR * spc, COUNT FAR * navc, COUNT FAR * bps, COUNT FAR * nc)
{
struct dpb *dpbp;
struct cds FAR *cdsp;
static char rg[8];
/* next - "log" in the drive */
drive = (drive == 0 ? default_drive : drive - 1);
cdsp = &CDSp->cds_table[drive];
if (cdsp->cdsFlags & 0x8000)
{
int2f_Remote_call(REM_GETSPACE, 0, 0, 0, cdsp, 0, &rg);
*spc = (COUNT) rg[0];
*navc = (COUNT) rg[2];
*bps = (COUNT) rg[4];
*nc = (COUNT) rg[6];
return;
}
/* first check for valid drive */
if (drive < 0 || drive > lastdrive)
{
*spc = -1;
return;
}
dpbp = (struct dpb *)CDSp->cds_table[drive].cdsDpb;
if (dpbp == 0)
{
*spc = -1;
return;
}
if ((media_check(dpbp) < 0))
{
*spc = -1;
return;
}
/* get the data vailable from dpb */
*nc = dpbp->dpb_size;
*spc = dpbp->dpb_clsmask + 1;
*bps = dpbp->dpb_secsize;
/* now tell fs to give us free cluster */
/* count */
*navc = dos_free(dpbp);
}
COUNT dos_findnext(void)
{
REG f_node_ptr fnp;
REG dmatch *dmp = &sda_tmp_dm;
/* Allocate an fnode if possible - error return (0) if not. */
if ((fnp = get_f_node()) == (f_node_ptr) 0)
{
return DE_NFILES;
}
memset(fnp, 0, sizeof(*fnp));
/* Force the fnode into read-write mode */
fnp->f_mode = RDWR;
/* Select the default to help non-drive specified path */
/* searches... */
fnp->f_dpb = get_dpb(dmp->dm_drive);
if (media_check(fnp->f_dpb) < 0)
{
release_f_node(fnp);
return DE_NFILES;
}
dir_init_fnode(fnp, dmp->dm_dircluster);
/* Search through the directory to find the entry, but do a */
/* seek first. */
fnp->f_diroff = dmp->dm_entry;
/* Loop through the directory */
while (dir_read(fnp) == 1)
{
++dmp->dm_entry;
++fnp->f_diroff;
if (fnp->f_dir.dir_name[0] != '\0' && fnp->f_dir.dir_name[0] != DELETED &&
!(fnp->f_dir.dir_attrib & D_VOLID) &&
fcmp_wild(dmp->dm_name_pat, fnp->f_dir.dir_name, FNAME_SIZE+FEXT_SIZE) &&
/*
MSD Command.com uses FCB FN 11 & 12 with attrib set to 0x16.
Bits 0x21 seem to get set some where in MSD so Rd and Arc
files are returned. RdOnly + Archive bits are ignored
*/
/* Test the attribute as the final step */
!(~dmp->dm_attr_srch & (D_DIR|D_SYSTEM|D_HIDDEN) & fnp->f_dir.dir_attrib))
{
/* If found, transfer it to the dmatch structure */
dmp->dm_dircluster = fnp->f_dirstart;
memcpy(&SearchDir, &fnp->f_dir, sizeof(struct dirent));
/* return the result */
release_f_node(fnp);
return SUCCESS;
}
}
FDirDbgPrintf(("dos_findnext: %11s\n", fnp->f_dir.dir_name));
/* return the result */
release_f_node(fnp);
return DE_NFILES;
}
f_node_ptr dir_open(register const char *dirname)
{
f_node_ptr fnp;
int i;
char fcbname[FNAME_SIZE + FEXT_SIZE];
FDirDbgPrintf(("dir_open: trying to open %s\n", dirname));
/* Allocate an fnode if possible - error return (0) if not. */
if ((fnp = get_f_node()) == (f_node_ptr) 0)
{
FDirDbgPrintf(("dir_open: failed to get f_node\n"));
return (f_node_ptr) 0;
}
/* Force the fnode into read-write mode */
fnp->f_mode = RDWR;
/* determine what drive and dpb we are using... */
fnp->f_dpb = get_dpb(dirname[0]-'A');
/* Perform all directory common handling after all special */
/* handling has been performed. */
if (media_check(fnp->f_dpb) < 0)
{
FDirDbgPrintf(("dir_open: media_check failed\n"));
release_f_node(fnp);
return (f_node_ptr) 0;
}
/* Walk the directory tree to find the starting cluster */
/* */
/* Start from the root directory (dirstart = 0) */
/* The CDS's cdsStartCls may be used to shorten the search
beginning at the CWD, see mapPath() and CDS.H in order
to enable this behaviour there.
-- 2001/09/04 ska*/
dir_init_fnode(fnp, 0);
dirname += 2; /* Assume FAT style drive */
while(*dirname != '\0')
{
/* skip all path seperators */
while (*dirname == '\\')
++dirname;
/* don't continue if we're at the end */
if (*dirname == '\0')
break;
/* Convert the name into an absolute name for */
/* comparison... */
memset(fcbname, ' ', FNAME_SIZE + FEXT_SIZE);
for (i = 0; i < FNAME_SIZE + FEXT_SIZE; i++, dirname++)
{
char c = *dirname;
if (c == '.')
i = FNAME_SIZE - 1;
else if (c != '\0' && c != '\\')
fcbname[i] = c;
else
break;
}
/* Now search through the directory to */
/* find the entry... */
i = FALSE;
while (dir_read(fnp) == 1)
{
if (!(fnp->f_dir.dir_attrib & D_VOLID) &&
fcbmatch(fcbname, fnp->f_dir.dir_name))
{
i = TRUE;
break;
}
fnp->f_diroff++;
}
if (!i || !(fnp->f_dir.dir_attrib & D_DIR))
{
FDirDbgPrintf(("dir_open: no match found, returning failure\n"));
release_f_node(fnp);
return (f_node_ptr) 0;
}
else
{
/* make certain we've moved off */
/* root */
dir_init_fnode(fnp, getdstart(fnp->f_dpb, &fnp->f_dir));
}
}
FDirDbgPrintf(("dir_open: returning, ok\n"));
return fnp;
}
VOID int21_service(iregs FAR * r)
{
COUNT rc = 0,
rc1;
psp FAR *p = MK_FP(cu_psp, 0);
void FAR *FP_DS_DX = MK_FP(r->DS, r->DX); /* this is saved so often,
that this saves ~100 bytes */
#define CLEAR_CARRY_FLAG() r->FLAGS &= ~FLG_CARRY
#define SET_CARRY_FLAG() r->FLAGS |= FLG_CARRY
p->ps_stack = (BYTE FAR *) r;
#ifdef DEBUG
if (bDumpRegs)
{
fbcopy((VOID FAR *) user_r, (VOID FAR *) & error_regs, sizeof(iregs));
printf("System call (21h): %02x\n", user_r->AX);
dump_regs = TRUE;
dump();
}
#endif
if(r->AH >=0x38 && r->AH <= 0x4F)
CLEAR_CARRY_FLAG();
/* Clear carry by default for these functions */
dispatch:
/* Check for Ctrl-Break */
switch (r->AH)
{
default:
if (!break_ena)
break;
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x08:
case 0x09:
case 0x0a:
case 0x0b:
if (control_break())
handle_break();
}
/* The dispatch handler */
switch (r->AH)
{
/* int 21h common error handler */
case 0x64:
error_invalid:
r->AX = -DE_INVLDFUNC;
goto error_out;
error_exit:
r->AX = -rc;
error_out:
CritErrCode = r->AX; /* Maybe set */
SET_CARRY_FLAG();
break;
/* case 0x00: --> Simulate a DOS-4C-00 */
/* Read Keyboard with Echo */
case 0x01:
r->AL = _sti(TRUE);
sto(r->AL);
break;
/* Display Character */
case 0x02:
sto(r->DL);
break;
/* Auxiliary Input */
case 0x03:
{
COUNT scratch;
GenericRead(STDAUX, 1, (BYTE FAR *) & r->AL, (COUNT FAR *) & scratch, TRUE);
break;
}
/* Auxiliary Output */
case 0x04:
{
COUNT scratch;
DosWrite(STDAUX, 1, (BYTE FAR *) & r->DL, (COUNT FAR *) &scratch);
break;
}
/* Print Character */
case 0x05:
{
COUNT scratch;
DosWrite(STDPRN, 1, (BYTE FAR *) & r->DL, (COUNT FAR *) &scratch);
break;
}
/* Direct Console I/O */
case 0x06:
if (r->DL != 0xff)
sto(r->DL);
else if (StdinBusy())
{
r->AL = 0x00;
r->FLAGS |= FLG_ZERO;
}
else
{
r->FLAGS &= ~FLG_ZERO;
r->AL = _sti(FALSE);
}
break;
/* Direct Console Input */
case 0x07:
r->AL = _sti(FALSE);
break;
/* Read Keyboard Without Echo */
case 0x08:
r->AL = _sti(TRUE);
break;
/* Display String */
case 0x09:
{
BYTE FAR * q;
q = FP_DS_DX;
while (*q != '$')
++q;
DosWrite(STDOUT, FP_OFF(q) - FP_OFF(FP_DS_DX), FP_DS_DX, (COUNT FAR *) & UnusedRetVal);
}
r->AL = '$';
break;
/* Buffered Keyboard Input */
case 0x0a:
sti_0a((keyboard FAR *) FP_DS_DX);
break;
/* Check Stdin Status */
case 0x0b:
if (StdinBusy())
r->AL = 0x00;
else
r->AL = 0xFF;
break;
/* Flush Buffer, Read Keayboard */
case 0x0c:
KbdFlush();
switch (r->AL)
{
case 0x01:
case 0x06:
case 0x07:
case 0x08:
case 0x0a:
r->AH = r->AL;
goto dispatch;
default:
r->AL = 0x00;
break;
}
break;
/* Reset Drive */
case 0x0d:
flush();
break;
/* Set Default Drive */
case 0x0e:
r->AL = DosSelectDrv(r->DL);
break;
case 0x0f:
if (FcbOpen(FP_DS_DX))
r->AL = 0;
else
r->AL = 0xff;
break;
case 0x10:
if (FcbClose(FP_DS_DX))
r->AL = 0;
else
r->AL = 0xff;
break;
case 0x11:
if (FcbFindFirst(FP_DS_DX))
r->AL = 0;
else
r->AL = 0xff;
break;
case 0x12:
if (FcbFindNext(FP_DS_DX))
r->AL = 0;
else
r->AL = 0xff;
break;
case 0x13:
if (FcbDelete(FP_DS_DX))
r->AL = 0;
else
r->AL = 0xff;
break;
case 0x14:
{
if (FcbRead(FP_DS_DX, &CritErrCode))
r->AL = 0;
else
r->AL = CritErrCode;
break;
}
case 0x15:
{
if (FcbWrite(FP_DS_DX, &CritErrCode))
r->AL = 0;
else
r->AL = CritErrCode;
break;
}
case 0x16:
if (FcbCreate(FP_DS_DX))
r->AL = 0;
else
r->AL = 0xff;
break;
case 0x17:
if (FcbRename(FP_DS_DX))
r->AL = 0;
else
r->AL = 0xff;
break;
default:
#ifdef DEBUG
printf("Unsupported INT21 AH = 0x%x, AL = 0x%x.\n", r->AH, r->AL);
#endif
/* Fall through. */
/* CP/M compatibility functions */
case 0x18:
case 0x1d:
case 0x1e:
case 0x20:
#ifndef TSC
case 0x61:
#endif
case 0x6b:
r->AL = 0;
break;
/* Get Default Drive */
case 0x19:
r->AL = default_drive;
break;
/* Set DTA */
case 0x1a:
{
psp FAR *p = MK_FP(cu_psp, 0);
p->ps_dta = FP_DS_DX;
dos_setdta(p->ps_dta);
}
break;
/* Get Default Drive Data */
case 0x1b:
{
BYTE FAR *p;
FatGetDrvData(0,
(COUNT FAR *) & r->AX,
(COUNT FAR *) & r->CX,
(COUNT FAR *) & r->DX,
(BYTE FAR **) & p);
r->DS = FP_SEG(p);
r->BX = FP_OFF(p);
}
break;
/* Get Drive Data */
case 0x1c:
{
BYTE FAR *p;
FatGetDrvData(r->DL,
(COUNT FAR *) & r->AX,
(COUNT FAR *) & r->CX,
(COUNT FAR *) & r->DX,
(BYTE FAR **) & p);
r->DS = FP_SEG(p);
r->BX = FP_OFF(p);
}
break;
/* Get default DPB */
/* case 0x1f: see case 0x32 */
/* Random read using FCB */
case 0x21:
{
if (FcbRandomIO(FP_DS_DX, &CritErrCode, FcbRead))
r->AL = 0;
else
r->AL = CritErrCode;
break;
}
/* Random write using FCB */
case 0x22:
{
if (FcbRandomIO(FP_DS_DX, &CritErrCode, FcbWrite))
r->AL = 0;
else
r->AL = CritErrCode;
break;
}
/* Get file size in records using FCB */
case 0x23:
if (FcbGetFileSize(FP_DS_DX))
r->AL = 0;
else
r->AL = 0xff;
break;
/* Set random record field in FCB */
case 0x24:
FcbSetRandom(FP_DS_DX);
break;
/* Set Interrupt Vector */
case 0x25:
{
VOID(INRPT FAR * p) () = FP_DS_DX;
setvec(r->AL, p);
}
break;
/* Dos Create New Psp */
case 0x26:
{
psp FAR *p = MK_FP(cu_psp, 0);
new_psp((psp FAR *) MK_FP(r->DX, 0), p->ps_size);
}
break;
/* Read random record(s) using FCB */
case 0x27:
{
if (FcbRandomBlockRead(FP_DS_DX, r->CX, &CritErrCode))
r->AL = 0;
else
r->AL = CritErrCode;
break;
}
/* Write random record(s) using FCB */
case 0x28:
{
if (FcbRandomBlockWrite(FP_DS_DX, r->CX, &CritErrCode))
r->AL = 0;
else
r->AL = CritErrCode;
break;
}
/* Parse File Name */
case 0x29:
{
BYTE FAR *lpFileName;
lpFileName = MK_FP(r->DS, r->SI);
r->AL = FcbParseFname(r->AL,
&lpFileName,
MK_FP(r->ES, r->DI));
r->DS = FP_SEG(lpFileName);
r->SI = FP_OFF(lpFileName);
}
break;
/* Get Date */
case 0x2a:
DosGetDate(
(BYTE FAR *) & (r->AL), /* WeekDay */
(BYTE FAR *) & (r->DH), /* Month */
(BYTE FAR *) & (r->DL), /* MonthDay */
(COUNT FAR *) & (r->CX)); /* Year */
break;
/* Set Date */
case 0x2b:
rc = DosSetDate(
(BYTE FAR *) & (r->DH), /* Month */
(BYTE FAR *) & (r->DL), /* MonthDay */
(COUNT FAR *) & (r->CX)); /* Year */
if (rc != SUCCESS)
r->AL = 0xff;
else
r->AL = 0;
break;
/* Get Time */
case 0x2c:
DosGetTime(
(BYTE FAR *) & (r->CH), /* Hour */
(BYTE FAR *) & (r->CL), /* Minutes */
(BYTE FAR *) & (r->DH), /* Seconds */
(BYTE FAR *) & (r->DL)); /* Hundredths */
break;
/* Set Date */
case 0x2d:
rc = DosSetTime(
(BYTE FAR *) & (r->CH), /* Hour */
(BYTE FAR *) & (r->CL), /* Minutes */
(BYTE FAR *) & (r->DH), /* Seconds */
(BYTE FAR *) & (r->DL)); /* Hundredths */
if (rc != SUCCESS)
r->AL = 0xff;
else
r->AL = 0;
break;
/* Set verify flag */
case 0x2e:
verify_ena = (r->AL ? TRUE : FALSE);
break;
/* Get DTA */
case 0x2f:
r->ES = FP_SEG(dta);
r->BX = FP_OFF(dta);
break;
/* Get DOS Version */
case 0x30:
r->AL = os_major;
r->AH = os_minor;
r->BH = OEM_ID;
r->CH = REVISION_MAJOR; /* JPP */
r->CL = REVISION_MINOR;
r->BL = REVISION_SEQ;
if (ReturnAnyDosVersionExpected)
{
/* TE for testing purpose only and NOT
to be documented:
return programs, who ask for version == XX.YY
exactly this XX.YY.
this makes most MS programs more happy.
*/
UBYTE FAR *retp = MK_FP(r->cs, r->ip);
if ( retp[0] == 0x3d && /* cmp ax, xxyy */
(retp[3] == 0x75 || retp[3] == 0x74)) /* je/jne error */
{
r->AL = retp[1];
r->AH = retp[2];
}
else if(retp[0] == 0x86 && /* xchg al,ah */
retp[1] == 0xc4 &&
retp[2] == 0x3d && /* cmp ax, xxyy */
(retp[5] == 0x75 || retp[5] == 0x74)) /* je/jne error */
{
r->AL = retp[4];
r->AH = retp[3];
}
}
break;
/* Keep Program (Terminate and stay resident) */
case 0x31:
DosMemChange(cu_psp, r->DX < 6 ? 6 : r->DX, 0);
return_mode = 3;
return_code = r->AL;
tsr = TRUE;
return_user();
break;
/* Get default BPB */
case 0x1f:
/* Get DPB */
case 0x32:
/* r->DL is NOT changed by MS 6.22 */
/* INT21/32 is documented to reread the DPB */
{
struct dpb FAR *dpb;
UCOUNT drv = r->DL;
if (drv == 0 || r->AH == 0x1f) drv = default_drive;
else drv--;
if (drv >= lastdrive)
{
r->AL = 0xFF;
CritErrCode = 0x0f;
break;
}
dpb = CDSp->cds_table[drv].cdsDpb;
if (dpb == 0 ||
CDSp->cds_table[drv].cdsFlags & CDSNETWDRV)
{
r->AL = 0xFF;
CritErrCode = 0x0f;
break;
}
dpb->dpb_flags = M_CHANGED; /* force reread of drive BPB/DPB */
if (media_check(dpb) < 0)
{
r->AL = 0xff;
CritErrCode = 0x0f;
break;
}
r->DS = FP_SEG(dpb);
r->BX = FP_OFF(dpb);
r->AL = 0;
}
break;
/*
case 0x33:
see int21_syscall
*/
/* Get InDOS flag */
case 0x34:
{
BYTE FAR *p;
p = (BYTE FAR *) ((BYTE *) & InDOS);
r->ES = FP_SEG(p);
r->BX = FP_OFF(p);
}
break;
/* Get Interrupt Vector */
case 0x35:
{
BYTE FAR *p;
p = getvec((COUNT) r->AL);
r->ES = FP_SEG(p);
r->BX = FP_OFF(p);
}
break;
/* Dos Get Disk Free Space */
case 0x36:
DosGetFree(
r->DL,
(COUNT FAR *) & r->AX,
(COUNT FAR *) & r->BX,
(COUNT FAR *) & r->CX,
(COUNT FAR *) & r->DX);
break;
/* Undocumented Get/Set Switchar */
case 0x37:
switch (r->AL)
{
/* Get switch character */
case 0x00:
r->DL = switchar;
r->AL = 0x00;
break;
/* Set switch character */
case 0x01:
switchar = r->DL;
r->AL = 0x00;
break;
default:
goto error_invalid;
}
break;
/* Get/Set Country Info */
case 0x38:
{
UWORD cntry = r->AL;
if(cntry == 0)
cntry = (UWORD)-1;
else if(cntry == 0xff)
cntry = r->BX;
if (0xffff == r->DX) {
/* Set Country Code */
if((rc = DosSetCountry(cntry)) < 0)
goto error_invalid;
} else {
/* Get Country Information */
if((rc = DosGetCountryInformation(cntry, FP_DS_DX)) < 0)
goto error_invalid;
/* HACK FIXME */
if(cntry == (UWORD)-1)
cntry = 1;
/* END OF HACK */
r->AX = r->BX = cntry;
}
}
break;
/* Dos Create Directory */
case 0x39:
rc = DosMkdir((BYTE FAR *) FP_DS_DX);
if (rc != SUCCESS)
goto error_exit;
break;
/* Dos Remove Directory */
case 0x3a:
rc = DosRmdir((BYTE FAR *) FP_DS_DX);
if (rc != SUCCESS)
goto error_exit;
break;
/* Dos Change Directory */
case 0x3b:
if ((rc = DosChangeDir((BYTE FAR *) FP_DS_DX)) < 0)
goto error_exit;
break;
/* Dos Create File */
case 0x3c:
if ((rc = DosCreat(FP_DS_DX, r->CX)) < 0)
goto error_exit;
else
r->AX = rc;
break;
/* Dos Open */
case 0x3d:
if ((rc = DosOpen(FP_DS_DX, r->AL)) < 0)
goto error_exit;
else
r->AX = rc;
break;
/* Dos Close */
case 0x3e:
if ((rc = DosClose(r->BX)) < 0)
goto error_exit;
break;
/* Dos Read */
case 0x3f:
rc1 = DosRead(r->BX, r->CX, FP_DS_DX, (COUNT FAR *) & rc);
if (rc != SUCCESS)
goto error_exit;
else
r->AX = rc1;
break;
/* Dos Write */
case 0x40:
rc1 = DosWrite(r->BX, r->CX, FP_DS_DX, (COUNT FAR *) & rc);
if (rc != SUCCESS)
goto error_exit;
else
r->AX = rc1;
break;
/* Dos Delete File */
case 0x41:
rc = DosDelete((BYTE FAR *) FP_DS_DX);
if (rc < 0)
goto error_exit;
break;
/* Dos Seek */
case 0x42:
{
ULONG lrc;
if ((rc = DosSeek(r->BX, (LONG) ((((LONG) (r->CX)) << 16) + r->DX), r->AL, &lrc)) < 0)
goto error_exit;
else
{
r->DX = (lrc >> 16);
r->AX = (UWORD)lrc;
}
}
break;
/* Get/Set File Attributes */
case 0x43:
switch (r->AL)
{
case 0x00:
rc = DosGetFattr((BYTE FAR *) FP_DS_DX);
if (rc >= SUCCESS)
r->CX = rc;
break;
case 0x01:
rc = DosSetFattr((BYTE FAR *) FP_DS_DX, r->CX);
break;
default:
goto error_invalid;
}
if (rc < SUCCESS)
goto error_exit;
break;
/* Device I/O Control */
case 0x44:
rc = DosDevIOctl(r);
if (rc != SUCCESS)
goto error_exit;
break;
/* Duplicate File Handle */
case 0x45:
rc = DosDup(r->BX);
if (rc < SUCCESS)
goto error_exit;
else
r->AX = rc;
break;
/* Force Duplicate File Handle */
case 0x46:
rc = DosForceDup(r->BX, r->CX);
if (rc < SUCCESS)
goto error_exit;
break;
/* Get Current Directory */
case 0x47:
if ((rc = DosGetCuDir(r->DL, MK_FP(r->DS, r->SI))) < 0)
goto error_exit;
else
r->AX = 0x0100; /*jpp: from interrupt list */
break;
/* Allocate memory */
case 0x48:
if ((rc = DosMemAlloc(r->BX, mem_access_mode, &(r->AX), &(r->BX))) < 0)
{
DosMemLargest(&(r->BX));
goto error_exit;
}
else
++(r->AX); /* DosMemAlloc() returns seg of MCB rather than data */
break;
/* Free memory */
case 0x49:
if ((rc = DosMemFree((r->ES) - 1)) < 0)
goto error_exit;
break;
/* Set memory block size */
case 0x4a:
{
UWORD maxSize;
if ((rc = DosMemChange(r->ES, r->BX, &maxSize)) < 0)
{
if (rc == DE_NOMEM)
r->BX = maxSize;
#if 0
if (cu_psp == r->ES)
{
psp FAR *p;
p = MK_FP(cu_psp, 0);
p->ps_size = r->BX + cu_psp;
}
#endif
goto error_exit;
}
break;
}
/* Load and Execute Program */
case 0x4b:
break_flg = FALSE;
if ((rc = DosExec(r->AL, MK_FP(r->ES, r->BX), FP_DS_DX))
!= SUCCESS)
goto error_exit;
break;
/* Terminate Program */
case 0x00:
r->AX = 0x4c00;
/* End Program */
case 0x4c:
if (cu_psp == RootPsp
|| ((psp FAR *) (MK_FP(cu_psp, 0)))->ps_parent == cu_psp)
break;
tsr = FALSE;
if (ErrorMode)
{
ErrorMode = FALSE;
return_mode = 2;
}
else if (break_flg)
{
break_flg = FALSE;
return_mode = 1;
}
else
{
return_mode = 0;
}
return_code = r->AL;
if (DosMemCheck() != SUCCESS)
panic("MCB chain corrupted");
#ifdef TSC
StartTrace();
#endif
return_user();
break;
/* Get Child-program Return Value */
case 0x4d:
r->AL = return_code;
r->AH = return_mode;
break;
/* Dos Find First */
case 0x4e:
/* dta for this call is set on entry. This */
/* needs to be changed for new versions. */
if ((rc = DosFindFirst((UCOUNT) r->CX, (BYTE FAR *) FP_DS_DX)) < 0)
goto error_exit;
r->AX = 0;
break;
/* Dos Find Next */
case 0x4f:
/* dta for this call is set on entry. This */
/* needs to be changed for new versions. */
if ((rc = DosFindNext()) < 0)
{
if (rc == DE_FILENOTFND)
rc = DE_NFILES;
goto error_exit;
}
else
r->AX = -SUCCESS;
break;
/*
case 0x50:
case 0x51:
see int21_syscall
*/
/* ************UNDOCUMENTED************************************* */
/* Get List of Lists */
case 0x52:
{
BYTE FAR *p;
p = (BYTE FAR *) & DPBp;
r->ES = FP_SEG(p);
r->BX = FP_OFF(p);
}
break;
case 0x53:
/* DOS 2+ internal - TRANSLATE BIOS PARAMETER BLOCK TO DRIVE PARAM BLOCK */
bpb_to_dpb((bpb FAR *)MK_FP(r->DS, r->SI), (struct dpb FAR *)MK_FP(r->ES, r->BP));
break;
/* Get verify state */
case 0x54:
r->AL = (verify_ena ? TRUE : FALSE);
break;
/* ************UNDOCUMENTED************************************* */
/* Dos Create New Psp & set p_size */
case 0x55:
new_psp((psp FAR *) MK_FP(r->DX, 0), r->SI);
cu_psp = r->DX;
break;
/* Dos Rename */
case 0x56:
rc = DosRename((BYTE FAR *) FP_DS_DX, (BYTE FAR *) MK_FP(r->ES, r->DI));
if (rc < SUCCESS)
goto error_exit;
else
CLEAR_CARRY_FLAG();
break;
/* Get/Set File Date and Time */
case 0x57:
CLEAR_CARRY_FLAG();
switch (r->AL)
{
case 0x00:
rc = DosGetFtime(
(COUNT) r->BX, /* Handle */
(date FAR *) & r->DX, /* FileDate */
(time FAR *) & r->CX); /* FileTime */
if (rc < SUCCESS)
goto error_exit;
break;
case 0x01:
rc = DosSetFtime(
(COUNT) r->BX, /* Handle */
(date) r->DX, /* FileDate */
(time) r->CX); /* FileTime */
if (rc < SUCCESS)
goto error_exit;
break;
default:
goto error_invalid;
}
break;
/* Get/Set Allocation Strategy */
case 0x58:
CLEAR_CARRY_FLAG();
switch (r->AL)
{
case 0x00:
r->AL = mem_access_mode;
r->AH = 0;
break;
case 0x01:
{
switch (r->BL)
{
case LAST_FIT:
case LAST_FIT_U:
case LAST_FIT_UO:
case BEST_FIT:
case BEST_FIT_U:
case BEST_FIT_UO:
case FIRST_FIT:
case FIRST_FIT_U:
case FIRST_FIT_UO:
mem_access_mode = r->BL;
break;
default:
goto error_invalid;
}
}
break;
case 0x02:
r->AL = uppermem_link;
break;
case 0x03:
if (uppermem_root) {
DosUmbLink(r->BL);
break;
} /* else fall through */
default:
goto error_invalid;
#ifdef DEBUG
case 0xff:
show_chain();
break;
#endif
}
break;
/* Get Extended Error */
case 0x59:
r->AX = CritErrCode;
r->ES = FP_SEG(CritErrDev);
r->DI = FP_OFF(CritErrDev);
r->CH = CritErrLocus;
r->BH = CritErrClass;
r->BL = CritErrAction;
CLEAR_CARRY_FLAG();
break;
/* Create Temporary File */
case 0x5a:
if ((rc = DosMkTmp(FP_DS_DX, r->CX)) < 0)
goto error_exit;
else
{
r->AX = rc;
CLEAR_CARRY_FLAG();
}
break;
/* Create New File */
case 0x5b:
if (!IsDevice(FP_DS_DX) && (rc = DosOpen(FP_DS_DX, 0)) >= 0)
{
DosClose(rc);
r->AX = 80;
goto error_out;
}
else
{
if ((rc = DosCreat(FP_DS_DX, r->CX)) < 0)
goto error_exit;
else
{
r->AX = rc;
CLEAR_CARRY_FLAG();
}
}
break;
/* /// Added for SHARE. - Ron Cemer */
/* Lock/unlock file access */
case 0x5c:
if ((rc = DosLockUnlock
(r->BX,
(((unsigned long)r->CX)<<16)|(((unsigned long)r->DX)&0xffffL),
(((unsigned long)r->SI)<<16)|(((unsigned long)r->DI)&0xffffL),
((r->AX & 0xff) != 0))) != 0)
goto error_exit;
CLEAR_CARRY_FLAG();
break;
/* /// End of additions for SHARE. - Ron Cemer */
/* UNDOCUMENTED: server, share.exe and sda function */
case 0x5d:
switch (r->AL)
{
/* Remote Server Call */
case 0x00:
{
UWORD FAR *x = FP_DS_DX;
r->AX = x[0];
r->BX = x[1];
r->CX = x[2];
r->DX = x[3];
r->SI = x[4];
r->DI = x[5];
r->DS = x[6];
r->ES = x[7];
}
goto dispatch;
case 0x06:
r->DS = FP_SEG(internal_data);
r->SI = FP_OFF(internal_data);
r->CX = swap_always - internal_data;
r->DX = swap_indos - internal_data;
CLEAR_CARRY_FLAG();
break;
case 0x07:
case 0x08:
case 0x09:
rc = -int2f_Remote_call(REM_PRINTREDIR, 0, 0, r->DX, 0, 0, (MK_FP(0, Int21AX)));
if (rc != SUCCESS)
goto error_exit;
CLEAR_CARRY_FLAG();
break;
default:
goto error_invalid;
}
break;
case 0x5e:
CLEAR_CARRY_FLAG();
switch (r->AL)
{
case 0x00:
r->CX = get_machine_name(FP_DS_DX);
break;
case 0x01:
set_machine_name(FP_DS_DX, r->CX);
break;
default:
rc = -int2f_Remote_call(REM_PRINTSET, r->BX, r->CX, r->DX, (MK_FP(r->ES, r->DI)), r->SI, (MK_FP(r->DS, Int21AX)));
if (rc != SUCCESS) goto error_exit;
r->AX=SUCCESS;
break;
}
break;
case 0x5f:
CLEAR_CARRY_FLAG();
switch (r->AL)
{
case 0x07:
if (r->DL < lastdrive) {
CDSp->cds_table[r->DL].cdsFlags |= 0x100;
}
break;
case 0x08:
if (r->DL < lastdrive) {
CDSp->cds_table[r->DL].cdsFlags &= ~0x100;
}
break;
default:
/*
void int_2f_111e_call(iregs FAR *r);
int_2f_111e_call(r);
break;*/
rc = -int2f_Remote_call(REM_DOREDIRECT, r->BX, r->CX, r->DX,
(MK_FP(r->ES, r->DI)), r->SI, (MK_FP(r->DS, Int21AX)));
if (rc != SUCCESS)
goto error_exit;
r->AX=SUCCESS;
break;
}
break;
case 0x60: /* TRUENAME */
CLEAR_CARRY_FLAG();
if ((rc = truename(MK_FP(r->DS, r->SI),
adjust_far(MK_FP(r->ES, r->DI)), FALSE)) != SUCCESS)
goto error_exit;
break;
#ifdef TSC
/* UNDOCUMENTED: no-op */
/* */
/* DOS-C: tsc support */
case 0x61:
#ifdef DEBUG
switch (r->AL)
{
case 0x01:
bTraceNext = TRUE;
break;
case 0x02:
bDumpRegs = FALSE;
break;
}
#endif
r->AL = 0x00;
break;
#endif
/* UNDOCUMENTED: return current psp
case 0x62: is in int21_syscall
r->BX = cu_psp;
break;
*/
/* UNDOCUMENTED: Double byte and korean tables */
case 0x63:
{
#define DBLBYTE
#ifdef DBLBYTE
static char dbcsTable[2] =
{
0, 0
};
void FAR *dp = &dbcsTable;
r->DS = FP_SEG(dp);
r->SI = FP_OFF(dp);
r->AL = 0;
#else
/* not really supported, but will pass. */
r->AL = 0x00; /*jpp: according to interrupt list */
/*Bart: fails for PQDI: use the above again */
#endif
break;
}
/*
case 0x64:
see above (invalid)
*/
/* Extended country info */
case 0x65:
switch(r->AL) {
case 0x20: /* upcase single character */
r->DL = DosUpChar(r->DL);
break;
case 0x21: /* upcase memory area */
DosUpMem(FP_DS_DX, r->CX);
break;
case 0x22: /* upcase ASCIZ */
DosUpString(FP_DS_DX);
break;
case 0xA0: /* upcase single character of filenames */
r->DL = DosUpFChar(r->DL);
break;
case 0xA1: /* upcase memory area of filenames */
DosUpFMem(FP_DS_DX, r->CX);
break;
case 0xA2: /* upcase ASCIZ of filenames */
DosUpFString(FP_DS_DX);
break;
case 0x23: /* check Yes/No response */
r->AX = DosYesNo(r->DL);
break;
default:
if ((rc = DosGetData(
r->AL, r->BX, r->DX, r->CX,
MK_FP(r->ES, r->DI))) < 0) {
#ifdef NLS_DEBUG
printf("DosGetData() := %d\n", rc);
#endif
goto error_exit;
}
#ifdef NLS_DEBUG
printf("DosGetData() returned successfully\n", rc);
#endif
break;
}
CLEAR_CARRY_FLAG();
break;
/* Code Page functions */
case 0x66: {
int rc;
switch (r->AL)
{
case 1:
rc = DosGetCodepage(&r->BX, &r->DX);
break;
case 2:
rc = DosSetCodepage(r->BX, r->DX);
break;
default:
goto error_invalid;
}
if(rc != SUCCESS)
goto error_exit;
CLEAR_CARRY_FLAG();
break;
}
/* Set Max file handle count */
case 0x67:
if ((rc = SetJFTSize(r->BX)) != SUCCESS)
goto error_exit;
else
CLEAR_CARRY_FLAG();
break;
/* Flush file buffer -- COMMIT FILE -- dummy function right now. */
case 0x68:
case 0x6a:
CLEAR_CARRY_FLAG();
break;
/* Get/Set Serial Number */
case 0x69:
rc = ( r->BL == 0 ? default_drive : r->BL - 1);
if (rc < lastdrive)
{
UWORD saveCX = r->CX;
if (CDSp->cds_table[rc].cdsFlags & CDSNETWDRV) {
goto error_invalid;
}
switch(r->AL){
case 0x00:
r->AL = 0x0d;
r->CX = 0x0866;
rc = DosDevIOctl(r);
break;
case 0x01:
r->AL = 0x0d;
r->CX = 0x0846;
rc = DosDevIOctl(r);
break;
}
r->CX = saveCX;
if (rc != SUCCESS)
goto error_exit;
CLEAR_CARRY_FLAG();
break;
}
else
r->AL = 0xFF;
break;
/*
case 0x6a: see case 0x68
case 0x6b: dummy func: return AL=0
*/
/* Extended Open-Creat, not fully functional. (bits 4,5,6 of BH) */
case 0x6c:
{
COUNT x = 0;
if (r->AL != 0 || r->DH != 0 ||
(r->DL&0x0f) > 0x2 || (r->DL&0xf0) > 0x10)
goto error_invalid;
CLEAR_CARRY_FLAG();
if ((rc = DosOpen(MK_FP(r->DS, r->SI),
(r->DL&0x0f) == 0x1 ? r->BL : 0)) < 0)
{
if (r->DL < 0x10)
goto error_exit;
/* else try to create below */
}
else switch (r->DL & 0x0f)
{
case 0x0:
/* fail if file exists */
DosClose(rc);
rc = DE_FILEEXISTS;
goto error_exit;
case 0x1:
/* file exists and opened: OK */
r->CX = 0x01;
goto break_out;
case 0x2:
/* file exists: replace/open */
DosClose(rc);
x = 1;
break;
}
/* cases 0x00, 0x01 are finished now */
if ((rc = DosCreat(MK_FP(r->DS, r->SI), r->CX)) < 0)
goto error_exit;
r->CX = x+2;
break_out:
r->AX = rc;
break;
}
/* case 0x6d and above not implemented : see default; return AL=0 */
}
#ifdef DEBUG
if (bDumpRegs)
{
fbcopy((VOID FAR *) user_r, (VOID FAR *) & error_regs,
sizeof(iregs));
dump_regs = TRUE;
dump();
}
#endif
}
f_node_ptr dir_open(BYTE * dirname)
{
f_node_ptr fnp;
COUNT drive;
BYTE *p;
WORD i;
struct cds FAR *cdsp;
BYTE *pszPath = dirname + 2;
/* Allocate an fnode if possible - error return (0) if not. */
if ((fnp = get_f_node()) == (f_node_ptr)0)
{
return (f_node_ptr)0;
}
/* Force the fnode into read-write mode */
fnp->f_mode = RDWR;
/* determine what drive we are using... */
if (ParseDosName(dirname, &drive, (BYTE *) 0, (BYTE *) 0, (BYTE *) 0, FALSE)
!= SUCCESS)
{
release_f_node(fnp);
return NULL;
}
/* If the drive was specified, drive is non-negative and */
/* corresponds to the one passed in, i.e., 0 = A, 1 = B, etc. */
/* We use that and skip the "D:" part of the string. */
/* Otherwise, just use the default drive */
if (drive >= 0)
{
dirname += 2; /* Assume FAT style drive */
}
else
{
drive = default_drive;
}
if (drive >= lastdrive) {
release_f_node(fnp);
return NULL;
}
cdsp = &CDSp->cds_table[drive];
/* Generate full path name */
/* not necessary anymore, since truename did that already
i = cdsp->cdsJoinOffset;
ParseDosPath(dirname, (COUNT *) 0, pszPath, (BYTE FAR *) & cdsp->cdsCurrentPath[i]); */
/* for testing only for now */
#if 0
if ((cdsp->cdsFlags & CDSNETWDRV))
{
printf("FailSafe %x \n", Int21AX);
return fnp;
}
#endif
if (cdsp->cdsDpb == 0)
{
release_f_node(fnp);
return NULL;
}
fnp->f_dpb = cdsp->cdsDpb;
/* Perform all directory common handling after all special */
/* handling has been performed. */
if (media_check(fnp->f_dpb) < 0)
{
release_f_node(fnp);
return (f_node_ptr)0;
}
/* Walk the directory tree to find the starting cluster */
/* */
/* Start from the root directory (dirstart = 0) */
dir_init_fnode(fnp, 0);
for (p = pszPath; *p != '\0';)
{
/* skip all path seperators */
while (*p == '\\')
++p;
/* don't continue if we're at the end */
if (*p == '\0')
break;
/* Convert the name into an absolute name for */
/* comparison... */
/* first the file name with trailing spaces... */
memset(TempBuffer, ' ', FNAME_SIZE+FEXT_SIZE);
for (i = 0; i < FNAME_SIZE; i++)
{
if (*p != '\0' && *p != '.' && *p != '/' && *p != '\\')
TempBuffer[i] = *p++;
else
break;
}
/* and the extension (don't forget to */
/* add trailing spaces)... */
if (*p == '.')
++p;
for (i = 0; i < FEXT_SIZE; i++)
{
if (*p != '\0' && *p != '.' && *p != '/' && *p != '\\')
TempBuffer[i + FNAME_SIZE] = *p++;
else
break;
}
/* Now search through the directory to */
/* find the entry... */
i = FALSE;
DosUpFMem((BYTE FAR *) TempBuffer, FNAME_SIZE + FEXT_SIZE);
while (dir_read(fnp) == 1)
{
if (fnp->f_dir.dir_name[0] != '\0' && fnp->f_dir.dir_name[0] != DELETED)
{
if (fcmp(TempBuffer, (BYTE *)fnp->f_dir.dir_name, FNAME_SIZE + FEXT_SIZE))
{
i = TRUE;
break;
}
}
}
if (!i || !(fnp->f_dir.dir_attrib & D_DIR))
{
release_f_node(fnp);
return (f_node_ptr)0;
}
else
{
/* make certain we've moved off */
/* root */
dir_init_fnode(fnp, getdstart(fnp->f_dir));
}
}
return fnp;
}
COUNT dos_findnext(void)
{
REG dmatch *dmp = (dmatch *) TempBuffer;
REG f_node_ptr fnp;
BOOL found = FALSE;
/* Allocate an fnode if possible - error return (0) if not. */
if ((fnp = get_f_node()) == (f_node_ptr)0)
{
return DE_NFILES;
}
memset(fnp, 0, sizeof(*fnp));
/* Force the fnode into read-write mode */
fnp->f_mode = RDWR;
/* Select the default to help non-drive specified path */
/* searches... */
fnp->f_dpb = CDSp->cds_table[dmp->dm_drive].cdsDpb;
if (media_check(fnp->f_dpb) < 0)
{
release_f_node(fnp);
return DE_NFILES;
}
dir_init_fnode(fnp, dmp->dm_dircluster);
/* Search through the directory to find the entry, but do a */
/* seek first. */
if (dmp->dm_entry > 0)
{
fnp->f_diroff = (ULONG)(dmp->dm_entry - 1) * DIRENT_SIZE;
fnp->f_flags.f_dnew = FALSE;
}
else
{
fnp->f_diroff = 0;
fnp->f_flags.f_dnew = TRUE;
}
/* Loop through the directory */
while (dir_read(fnp) == 1)
{
++dmp->dm_entry;
if (fnp->f_dir.dir_name[0] != '\0' && fnp->f_dir.dir_name[0] != DELETED
&& (fnp->f_dir.dir_attrib & D_VOLID) != D_VOLID )
{
if (fcmp_wild((BYTE FAR *)dmp->dm_name_pat, (BYTE FAR *)fnp->f_dir.dir_name, FNAME_SIZE + FEXT_SIZE))
{
/*
MSD Command.com uses FCB FN 11 & 12 with attrib set to 0x16.
Bits 0x21 seem to get set some where in MSD so Rd and Arc
files are returned.
RdOnly + Archive bits are ignored
*/
/* Test the attribute as the final step */
if (!(fnp->f_dir.dir_attrib & D_VOLID) &&
((~dmp->dm_attr_srch & fnp->f_dir.dir_attrib & (D_DIR | D_SYSTEM | D_HIDDEN)) == 0))
{
found = TRUE;
break;
}
else
continue;
}
}
}
/* If found, transfer it to the dmatch structure */
if (found)
{
dmp->dm_dircluster = fnp->f_dirstart;
memcpy(&SearchDir, &fnp->f_dir, sizeof(struct dirent));
}
/* return the result */
release_f_node(fnp);
return found ? SUCCESS : DE_NFILES;
}
COUNT dos_findnext(void)
{
REG dmatch FAR *dmp = (dmatch FAR *) dta;
REG struct f_node FAR *fnp;
BOOL found = FALSE;
BYTE FAR *p;
BYTE FAR *q;
COUNT nDrive;
struct cds FAR *cdsp;
/* assign our match parameters pointer. */
dmp = (dmatch FAR *) dta;
nDrive = dmp->dm_drive;
cdsp = &CDSp->cds_table[nDrive];
if (cdsp->cdsFlags & 0x8000)
{
if (Remote_find(REM_FINDNEXT, 0, 0, dmp) != 0)
return DE_FILENOTFND;
return SUCCESS;
}
/* Allocate an fnode if possible - error return (0) if not. */
if ((fnp = get_f_node()) == (struct f_node FAR *)0)
{
return DE_FILENOTFND;
}
/* Force the fnode into read-write mode */
fnp->f_mode = RDWR;
/* Select the default to help non-drive specified path */
/* searches... */
fnp->f_dpb = (struct dpb *)CDSp->cds_table[dmp->dm_drive].cdsDpb;
if (media_check(fnp->f_dpb) < 0)
{
release_f_node(fnp);
return DE_FILENOTFND;
}
fnp->f_dsize = DIRENT_SIZE * (fnp->f_dpb)->dpb_dirents;
/* Search through the directory to find the entry, but do a */
/* seek first. */
if (dmp->dm_entry > 0)
fnp->f_diroff = (dmp->dm_entry - 1) * DIRENT_SIZE;
fnp->f_offset = fnp->f_highwater = fnp->f_diroff;
fnp->f_cluster = dmp->dm_cluster;
fnp->f_cluster_offset = 0l; /*JPP */
fnp->f_flags.f_dmod = dmp->dm_flags.f_dmod;
fnp->f_flags.f_droot = dmp->dm_flags.f_droot;
fnp->f_flags.f_dnew = dmp->dm_flags.f_dnew;
fnp->f_flags.f_ddir = dmp->dm_flags.f_ddir;
fnp->f_flags.f_dfull = dmp->dm_flags.f_dfull;
fnp->f_dirstart = dmp->dm_dirstart;
/* Loop through the directory */
while (dir_read(fnp) == DIRENT_SIZE)
{
++dmp->dm_entry;
if (fnp->f_dir.dir_name[0] != '\0' && fnp->f_dir.dir_name[0] != DELETED)
{
if (fcmp_wild((BYTE FAR *) (dmp->dm_name_pat), (BYTE FAR *) fnp->f_dir.dir_name, FNAME_SIZE + FEXT_SIZE))
{
/* Test the attribute as the final step */
if (!(~dmp->dm_attr_srch & fnp->f_dir.dir_attrib))
{
found = TRUE;
break;
}
else
continue;
}
}
}
/* If found, transfer it to the dmatch structure */
if (found)
pop_dmp(dmp, fnp);
/* return the result */
release_f_node(fnp);
return found ? SUCCESS : DE_FILENOTFND;
}
struct f_node FAR *dir_open(BYTE FAR * dirname)
{
struct f_node FAR *fnp;
COUNT drive;
BYTE *p;
WORD i,
x;
BYTE *s;
struct cds FAR *cdsp;
BYTE *pszPath = &TempCDS.cdsCurrentPath[2];
/* Allocate an fnode if possible - error return (0) if not. */
if ((fnp = get_f_node()) == (struct f_node FAR *)0)
{
return (struct f_node FAR *)NULL;
}
/* Force the fnode into read-write mode */
fnp->f_mode = RDWR;
/* and initialize temporary CDS */
TempCDS.cdsFlags = 0;
/* determine what drive we are using... */
dirname = adjust_far(dirname);
if (ParseDosName(dirname, &drive, (BYTE *) 0, (BYTE *) 0, (BYTE *) 0, FALSE)
!= SUCCESS)
{
release_f_node(fnp);
return NULL;
}
/* If the drive was specified, drive is non-negative and */
/* corresponds to the one passed in, i.e., 0 = A, 1 = B, etc. */
/* We use that and skip the "D:" part of the string. */
/* Otherwise, just use the default drive */
if (drive >= 0)
{
dirname += 2; /* Assume FAT style drive */
TempCDS.cdsDpb = CDSp->cds_table[drive].cdsDpb;
}
else
{
drive = default_drive;
TempCDS.cdsDpb = CDSp->cds_table[drive].cdsDpb;
}
cdsp = &CDSp->cds_table[drive];
TempCDS.cdsCurrentPath[0] = 'A' + drive;
TempCDS.cdsCurrentPath[1] = ':';
TempCDS.cdsJoinOffset = 2;
x = cdsp->cdsJoinOffset;
/* Generate full path name */
ParseDosPath(dirname, (COUNT *) 0, pszPath, (BYTE FAR *) & cdsp->cdsCurrentPath[x]);
if ((cdsp->cdsFlags & 0x8000))
{
printf("FailSafe %x \n", Int21AX);
return fnp;
}
if (TempCDS.cdsDpb == 0)
{
release_f_node(fnp);
return NULL;
}
/* if (drive >= lastdrive)
{
release_f_node(fnp);
return NULL;
}
*/
fnp->f_dpb = (struct dpb *)TempCDS.cdsDpb;
/* Perform all directory common handling after all special */
/* handling has been performed. */
if (media_check((struct dpb *)TempCDS.cdsDpb) < 0)
{
release_f_node(fnp);
return (struct f_node FAR *)0;
}
fnp->f_dsize = DIRENT_SIZE * TempCDS.cdsDpb->dpb_dirents;
fnp->f_diroff = 0l;
fnp->f_flags.f_dmod = FALSE; /* a brand new fnode */
fnp->f_flags.f_dnew = TRUE;
fnp->f_flags.f_dremote = FALSE;
fnp->f_dirstart = 0;
/* Walk the directory tree to find the starting cluster */
/* */
/* Set the root flags since we always start from the root */
fnp->f_flags.f_droot = TRUE;
for (p = pszPath; *p != '\0';)
{
/* skip all path seperators */
while (*p == '\\')
++p;
/* don't continue if we're at the end */
if (*p == '\0')
break;
/* Convert the name into an absolute name for */
/* comparison... */
/* first the file name with trailing spaces... */
for (i = 0; i < FNAME_SIZE; i++)
{
if (*p != '\0' && *p != '.' && *p != '/' && *p != '\\')
TempBuffer[i] = *p++;
else
break;
}
for (; i < FNAME_SIZE; i++)
TempBuffer[i] = ' ';
/* and the extension (don't forget to */
/* add trailing spaces)... */
if (*p == '.')
++p;
for (i = 0; i < FEXT_SIZE; i++)
{
if (*p != '\0' && *p != '.' && *p != '/' && *p != '\\')
TempBuffer[i + FNAME_SIZE] = *p++;
else
break;
}
for (; i < FEXT_SIZE; i++)
TempBuffer[i + FNAME_SIZE] = ' ';
/* Now search through the directory to */
/* find the entry... */
i = FALSE;
upMem((BYTE FAR *) TempBuffer, FNAME_SIZE + FEXT_SIZE);
while (dir_read(fnp) == DIRENT_SIZE)
{
if (fnp->f_dir.dir_name[0] != '\0' && fnp->f_dir.dir_name[0] != DELETED)
{
if (fcmp((BYTE FAR *) TempBuffer, (BYTE FAR *) fnp->f_dir.dir_name, FNAME_SIZE + FEXT_SIZE))
{
i = TRUE;
break;
}
}
}
if (!i || !(fnp->f_dir.dir_attrib & D_DIR))
{
release_f_node(fnp);
return (struct f_node FAR *)0;
}
else
{
/* make certain we've moved off */
/* root */
fnp->f_flags.f_droot = FALSE;
fnp->f_flags.f_ddir = TRUE;
/* set up for file read/write */
fnp->f_offset = 0l;
fnp->f_cluster_offset = 0l; /*JPP */
fnp->f_highwater = 0l;
fnp->f_cluster = fnp->f_dir.dir_start;
fnp->f_dirstart = fnp->f_dir.dir_start;
/* reset the directory flags */
fnp->f_diroff = 0l;
fnp->f_flags.f_dmod = FALSE;
fnp->f_flags.f_dnew = TRUE;
fnp->f_dsize = DIRENT_SIZE * TempCDS.cdsDpb->dpb_dirents;
}
}
return fnp;
}