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FreeDOS/kernel/dosfns.c
Jim Hall 060002c5ae Initial revision 
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@2 6ac86273-5f31-0410-b378-82cca8765d1b
2000-05-06 19:34:20 +00:00

1149 lines
27 KiB
C
Raw Blame History

/****************************************************************/
/* */
/* dosfns.c */
/* */
/* DOS functions */
/* */
/* Copyright (c) 1995 */
/* Pasquale J. Villani */
/* All Rights Reserved */
/* */
/* This file is part of DOS-C. */
/* */
/* DOS-C is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU General Public License */
/* as published by the Free Software Foundation; either version */
/* 2, or (at your option) any later version. */
/* */
/* DOS-C is distributed in the hope that it will be useful, but */
/* WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
/* the GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public */
/* License along with DOS-C; see the file COPYING. If not, */
/* write to the Free Software Foundation, 675 Mass Ave, */
/* Cambridge, MA 02139, USA. */
/****************************************************************/
#include "portab.h"
#ifdef VERSION_STRINGS
static BYTE *dosfnsRcsId = "$Id$";
#endif
/*
* $Log$
* Revision 1.1 2000/05/06 19:34:59 jhall1
* Initial revision
*
* Revision 1.11 2000/03/09 06:07:11 kernel
* 2017f updates by James Tabor
*
* Revision 1.10 1999/09/23 04:40:46 jprice
* *** empty log message ***
*
* Revision 1.8 1999/09/14 01:01:53 jprice
* Fixed bug where you could write over directories.
*
* Revision 1.7 1999/08/25 03:18:07 jprice
* ror4 patches to allow TC 2.01 compile.
*
* Revision 1.6 1999/05/03 06:25:45 jprice
* Patches from ror4 and many changed of signed to unsigned variables.
*
* Revision 1.5 1999/04/16 12:21:22 jprice
* Steffen c-break handler changes
*
* Revision 1.4 1999/04/12 03:21:17 jprice
* more ror4 patches. Changes for multi-block IO
*
* Revision 1.3 1999/04/11 04:33:38 jprice
* ror4 patches
*
* Revision 1.2 1999/04/04 18:51:43 jprice
* no message
*
* Revision 1.1.1.1 1999/03/29 15:41:52 jprice
* New version without IPL.SYS
*
* Revision 1.4 1999/02/09 02:54:23 jprice
* Added Pat's 1937 kernel patches
*
* Revision 1.3 1999/02/01 01:43:28 jprice
* Fixed findfirst function to find volume label with Windows long filenames
*
* Revision 1.2 1999/01/22 04:15:28 jprice
* Formating
*
* Revision 1.1.1.1 1999/01/20 05:51:00 jprice
* Imported sources
*
* Rev 1.10 06 Dec 1998 8:44:42 patv
* Expanded dos functions due to new I/O subsystem.
*
* Rev 1.9 04 Jan 1998 23:14:38 patv
* Changed Log for strip utility
*
* Rev 1.8 03 Jan 1998 8:36:04 patv
* Converted data area to SDA format
*
* Rev 1.7 22 Jan 1997 12:59:56 patv
* pre-0.92 bug fixes
*
* Rev 1.6 16 Jan 1997 12:46:32 patv
* pre-Release 0.92 feature additions
*
* Rev 1.5 29 May 1996 21:15:20 patv
* bug fixes for v0.91a
*
* Rev 1.4 19 Feb 1996 3:20:08 patv
* Added NLS, int2f and config.sys processing
*
* Rev 1.2 01 Sep 1995 17:48:48 patv
* First GPL release.
*
* Rev 1.1 30 Jul 1995 20:50:24 patv
* Eliminated version strings in ipl
*
* Rev 1.0 02 Jul 1995 8:04:20 patv
* Initial revision.
*/
#include "globals.h"
sft FAR *get_sft(COUNT);
WORD get_free_hndl(VOID);
sft FAR *get_free_sft(WORD FAR *);
BYTE FAR *get_root(BYTE FAR *);
BOOL cmatch(COUNT, COUNT, COUNT);
BOOL fnmatch(BYTE FAR *, BYTE FAR *, COUNT, COUNT);
struct f_node FAR *xlt_fd(COUNT);
static VOID DosGetFile(BYTE FAR * lpszPath, BYTE FAR * lpszDosFileName)
{
BYTE szLclName[FNAME_SIZE + 1];
BYTE szLclExt[FEXT_SIZE + 1];
ParseDosName(lpszPath, (COUNT *) 0, (BYTE *) 0,
szLclName, szLclExt, FALSE);
SpacePad(szLclName, FNAME_SIZE);
SpacePad(szLclExt, FEXT_SIZE);
fbcopy((BYTE FAR *) szLclName, lpszDosFileName, FNAME_SIZE);
fbcopy((BYTE FAR *) szLclExt, &lpszDosFileName[FNAME_SIZE], FEXT_SIZE);
}
sft FAR *get_sft(COUNT hndl)
{
psp FAR *p = MK_FP(cu_psp, 0);
WORD sys_idx;
sfttbl FAR *sp;
if (hndl >= p->ps_maxfiles)
return (sft FAR *) - 1;
/* Get the SFT block that contains the SFT */
if (p->ps_filetab[hndl] == 0xff)
return (sft FAR *) - 1;
sys_idx = p->ps_filetab[hndl];
for (sp = sfthead; sp != (sfttbl FAR *) - 1; sp = sp->sftt_next)
{
if (sys_idx < sp->sftt_count)
break;
else
sys_idx -= sp->sftt_count;
}
/* If not found, return an error */
if (sp == (sfttbl FAR *) - 1)
return (sft FAR *) - 1;
/* finally, point to the right entry */
return (sft FAR *) & (sp->sftt_table[sys_idx]);
}
/*
* The `force_binary' parameter is a hack to allow functions 0x01, 0x06, 0x07,
* and function 0x40 to use the same code for performing reads, even though the
* two classes of functions behave quite differently: 0x01 etc. always do
* binary reads, while for 0x40 the type of read (binary/text) depends on what
* the SFT says. -- ror4
*/
UCOUNT GenericRead(COUNT hndl, UCOUNT n, BYTE FAR * bp, COUNT FAR * err,
BOOL force_binary)
{
sft FAR *s;
WORD sys_idx;
sfttbl FAR *sp;
UCOUNT ReadCount;
/* Test that the handle is valid */
if (hndl < 0)
{
*err = DE_INVLDHNDL;
return 0;
}
/* Get the SFT block that contains the SFT */
if ((s = get_sft(hndl)) == (sft FAR *) - 1)
{
*err = DE_INVLDHNDL;
return 0;
}
/* If not open or write permission - exit */
if (s->sft_count == 0 || (s->sft_mode & SFT_MWRITE))
{
*err = DE_INVLDACC;
return 0;
}
/*
* Do remote first or return error.
* must have been opened from remote.
*/
if (s->sft_flags & SFT_FSHARED)
{
ReadCount = Remote_RW(REM_READ, n, bp, s, err);
if (err)
{
*err = SUCCESS;
return ReadCount;
}
else
return 0;
}
/* Do a device read if device */
if (s->sft_flags & SFT_FDEVICE)
{
request rq;
/* First test for eof and exit */
/* immediately if it is */
if (!(s->sft_flags & SFT_FEOF) || (s->sft_flags & SFT_FNUL))
{
s->sft_flags &= ~SFT_FEOF;
*err = SUCCESS;
return 0;
}
/* Now handle raw and cooked modes */
if (force_binary || (s->sft_flags & SFT_FBINARY))
{
rq.r_length = sizeof(request);
rq.r_command = C_INPUT;
rq.r_count = n;
rq.r_trans = (BYTE FAR *) bp;
rq.r_status = 0;
execrh((request FAR *) & rq, s->sft_dev);
if (rq.r_status & S_ERROR)
{
char_error(&rq, s->sft_dev);
}
else
{
*err = SUCCESS;
return rq.r_count;
}
}
else if (s->sft_flags & SFT_FCONIN)
{
kb_buf.kb_size = LINESIZE - 1;
kb_buf.kb_count = 0;
sti((keyboard FAR *) & kb_buf);
fbcopy((BYTE FAR *) kb_buf.kb_buf, bp, kb_buf.kb_count);
*err = SUCCESS;
return kb_buf.kb_count;
}
else
{
*bp = _sti();
*err = SUCCESS;
return 1;
}
}
else
/* a block read */
{
COUNT rc;
ReadCount = readblock(s->sft_status, bp, n, &rc);
if (rc != SUCCESS)
{
*err = rc;
return 0;
}
else
{
*err = SUCCESS;
return ReadCount;
}
}
*err = SUCCESS;
return 0;
}
UCOUNT DosRead(COUNT hndl, UCOUNT n, BYTE FAR * bp, COUNT FAR * err)
{
return GenericRead(hndl, n, bp, err, FALSE);
}
UCOUNT DosWrite(COUNT hndl, UCOUNT n, BYTE FAR * bp, COUNT FAR * err)
{
sft FAR *s;
WORD sys_idx;
sfttbl FAR *sp;
UCOUNT ReadCount;
/* Test that the handle is valid */
if (hndl < 0)
{
*err = DE_INVLDHNDL;
return 0;
}
/* Get the SFT block that contains the SFT */
if ((s = get_sft(hndl)) == (sft FAR *) - 1)
{
*err = DE_INVLDHNDL;
return 0;
}
/* If this is not opened and it's not a write */
/* another error */
if (s->sft_count == 0 ||
(!(s->sft_mode & SFT_MWRITE) && !(s->sft_mode & SFT_MRDWR)))
{
*err = DE_ACCESS;
return 0;
}
if (s->sft_flags & SFT_FSHARED)
{
ReadCount = Remote_RW(REM_WRITE, n, bp, s, err);
if (err)
{
return ReadCount;
}
else
return 0;
}
/* Do a device write if device */
if (s->sft_flags & SFT_FDEVICE)
{
request rq;
/* set to no EOF */
s->sft_flags &= ~SFT_FEOF;
/* if null just report full transfer */
if (s->sft_flags & SFT_FNUL)
{
*err = SUCCESS;
return n;
}
/* Now handle raw and cooked modes */
if (s->sft_flags & SFT_FBINARY)
{
rq.r_length = sizeof(request);
rq.r_command = C_OUTPUT;
rq.r_count = n;
rq.r_trans = (BYTE FAR *) bp;
rq.r_status = 0;
execrh((request FAR *) & rq, s->sft_dev);
if (rq.r_status & S_ERROR)
{
char_error(&rq, s->sft_dev);
}
else
{
if (s->sft_flags & SFT_FCONOUT)
{
WORD cnt = rq.r_count;
while (cnt--)
{
switch (*bp++)
{
case CR:
scr_pos = 0;
break;
case LF:
case BELL:
break;
case BS:
--scr_pos;
break;
default:
++scr_pos;
}
}
}
*err = SUCCESS;
return rq.r_count;
}
}
else
{
REG WORD c,
cnt = n,
spaces_left = 0,
next_pos,
xfer = 0;
static BYTE space = ' ';
start:
if (cnt-- == 0)
goto end;
if (*bp == CTL_Z)
goto end;
if (s->sft_flags & SFT_FCONOUT)
{
switch (*bp)
{
case CR:
next_pos = 0;
break;
case LF:
case BELL:
next_pos = scr_pos;
break;
case BS:
next_pos = scr_pos ? scr_pos - 1 : 0;
break;
case HT:
spaces_left = 8 - (scr_pos & 7);
next_pos = scr_pos + spaces_left;
goto output_space;
default:
next_pos = scr_pos + 1;
}
}
rq.r_length = sizeof(request);
rq.r_command = C_OUTPUT;
rq.r_count = 1;
rq.r_trans = bp;
rq.r_status = 0;
execrh((request FAR *) & rq, s->sft_dev);
if (rq.r_status & S_ERROR)
char_error(&rq, s->sft_dev);
goto post;
output_space:
rq.r_length = sizeof(request);
rq.r_command = C_OUTPUT;
rq.r_count = 1;
rq.r_trans = &space;
rq.r_status = 0;
execrh((request FAR *) & rq, s->sft_dev);
if (rq.r_status & S_ERROR)
char_error(&rq, s->sft_dev);
--spaces_left;
post:
if (spaces_left)
goto output_space;
++bp;
++xfer;
if (s->sft_flags & SFT_FCONOUT)
scr_pos = next_pos;
if (break_ena && control_break())
{
handle_break();
goto end;
}
goto start;
end:
*err = SUCCESS;
return xfer;
}
}
else
/* a block write */
{
COUNT rc;
ReadCount = writeblock(s->sft_status, bp, n, &rc);
if (rc < SUCCESS)
{
*err = rc;
return 0;
}
else
{
*err = SUCCESS;
return ReadCount;
}
}
*err = SUCCESS;
return 0;
}
COUNT DosSeek(COUNT hndl, LONG new_pos, COUNT mode, ULONG * set_pos)
{
sft FAR *s;
ULONG lrx;
/* Test for invalid mode */
if (mode < 0 || mode > 2)
return DE_INVLDFUNC;
/* Test that the handle is valid */
if (hndl < 0)
return DE_INVLDHNDL;
/* Get the SFT block that contains the SFT */
if ((s = get_sft(hndl)) == (sft FAR *) - 1)
return DE_INVLDHNDL;
lpCurSft = (sfttbl FAR *) s;
if (s->sft_flags & SFT_FSHARED)
{
if (mode == 2)
{ /* seek from end of file */
int2f_Remote_call(REM_LSEEK, 0, (UWORD) FP_SEG(new_pos), (UWORD) FP_OFF(new_pos), (VOID FAR *) s, 0, 0);
*set_pos = s->sft_posit;
return SUCCESS;
}
if (mode == 0)
{
s->sft_posit = new_pos;
*set_pos = new_pos;
return SUCCESS;
}
if (mode == 1)
{
s->sft_posit += new_pos;
*set_pos = s->sft_posit;
return SUCCESS;
}
return DE_INVLDFUNC;
}
/* Do special return for character devices */
if (s->sft_flags & SFT_FDEVICE)
{
*set_pos = 0l;
return SUCCESS;
}
else
{
*set_pos = dos_lseek(s->sft_status, new_pos, mode);
if ((LONG) * set_pos < 0)
return (int)*set_pos;
else
return SUCCESS;
}
}
static WORD get_free_hndl(void)
{
psp FAR *p = MK_FP(cu_psp, 0);
WORD hndl;
for (hndl = 0; hndl < p->ps_maxfiles; hndl++)
{
if (p->ps_filetab[hndl] == 0xff)
return hndl;
}
return 0xff;
}
static sft FAR *get_free_sft(WORD FAR * sft_idx)
{
WORD sys_idx = 0;
sfttbl FAR *sp;
/* Get the SFT block that contains the SFT */
for (sp = sfthead; sp != (sfttbl FAR *) - 1; sp = sp->sftt_next)
{
REG WORD i;
for (i = 0; i < sp->sftt_count; i++)
{
if (sp->sftt_table[i].sft_count == 0)
{
*sft_idx = sys_idx + i;
return (sft FAR *) & sp->sftt_table[sys_idx + i];
}
}
sys_idx += i;
}
/* If not found, return an error */
return (sft FAR *) - 1;
}
static BYTE FAR *get_root(BYTE FAR * fname)
{
BYTE FAR *froot;
REG WORD length;
/* find the end */
for (length = 0, froot = fname; *froot != '\0'; ++froot)
++length;
/* now back up to first path seperator or start */
for (--froot; length > 0 && !(*froot == '/' || *froot == '\\'); --froot)
--length;
return ++froot;
}
/* Ascii only file name match routines */
static BOOL cmatch(COUNT s, COUNT d, COUNT mode)
{
if (s >= 'a' && s <= 'z')
s -= 'a' - 'A';
if (d >= 'a' && d <= 'z')
d -= 'a' - 'A';
if (mode && s == '?' && (d >= 'A' && s <= 'Z'))
return TRUE;
return s == d;
}
static BOOL fnmatch(BYTE FAR * s, BYTE FAR * d, COUNT n, COUNT mode)
{
while (n--)
{
if (!cmatch(*s++, *d++, mode))
return FALSE;
}
return TRUE;
}
COUNT DosCreat(BYTE FAR * fname, COUNT attrib)
{
psp FAR *p = MK_FP(cu_psp, 0);
WORD hndl,
sft_idx;
sft FAR *sftp;
struct dhdr FAR *dhp;
BYTE FAR *froot;
WORD i;
/* get a free handle */
if ((hndl = get_free_hndl()) == 0xff)
return DE_TOOMANY;
/* now get a free system file table entry */
if ((sftp = get_free_sft((WORD FAR *) & sft_idx)) == (sft FAR *) - 1)
return DE_TOOMANY;
/* check for a device */
froot = get_root(fname);
for (i = 0; i < FNAME_SIZE; i++)
{
if (*froot != '\0' && *froot != '.')
PriPathName[i] = *froot++;
else
break;
}
for (; i < FNAME_SIZE; i++)
PriPathName[i] = ' ';
/* if we have an extension, can't be a device */
if (*froot != '.')
{
for (dhp = (struct dhdr FAR *)&nul_dev; dhp != (struct dhdr FAR *)-1; dhp = dhp->dh_next)
{
if (fnmatch((BYTE FAR *) PriPathName, (BYTE FAR *) dhp->dh_name, FNAME_SIZE, FALSE))
{
sftp->sft_count += 1;
sftp->sft_mode = SFT_MRDWR;
sftp->sft_attrib = attrib;
sftp->sft_flags =
((dhp->dh_attr & ~SFT_MASK) & ~SFT_FSHARED) | SFT_FDEVICE | SFT_FEOF;
sftp->sft_psp = cu_psp;
fbcopy((BYTE FAR *) PriPathName, sftp->sft_name, FNAME_SIZE + FEXT_SIZE);
sftp->sft_dev = dhp;
p->ps_filetab[hndl] = sft_idx;
return hndl;
}
}
}
if (Remote_OCT(REM_CREATE, fname, attrib, sftp) == 0)
{
if (sftp->sft_flags & SFT_FSHARED)
{
sftp->sft_count += 1;
p->ps_filetab[hndl] = sft_idx;
return hndl;
}
}
sftp->sft_status = dos_creat(fname, attrib);
if (sftp->sft_status >= 0)
{
p->ps_filetab[hndl] = sft_idx;
sftp->sft_count += 1;
sftp->sft_mode = SFT_MRDWR;
sftp->sft_attrib = attrib;
sftp->sft_flags = 0;
sftp->sft_psp = cu_psp;
DosGetFile(fname, sftp->sft_name);
return hndl;
}
else
return sftp->sft_status;
}
COUNT CloneHandle(COUNT hndl)
{
sft FAR *sftp;
/* now get the system file table entry */
if ((sftp = get_sft(hndl)) == (sft FAR *) - 1)
return DE_INVLDHNDL;
/* now that we have the system file table entry, get the fnode */
/* index, and increment the count, so that we've effectively */
/* cloned the file. */
sftp->sft_count += 1;
return SUCCESS;
}
COUNT DosDup(COUNT Handle)
{
psp FAR *p = MK_FP(cu_psp, 0);
COUNT NewHandle;
sft FAR *Sftp;
/* Get the SFT block that contains the SFT */
if ((Sftp = get_sft(Handle)) == (sft FAR *) - 1)
return DE_INVLDHNDL;
/* If not open - exit */
if (Sftp->sft_count <= 0)
return DE_INVLDHNDL;
/* now get a free handle */
if ((NewHandle = get_free_hndl()) == 0xff)
return DE_TOOMANY;
/* If everything looks ok, bump it up. */
if ((Sftp->sft_flags & SFT_FDEVICE) || (Sftp->sft_status >= 0))
{
p->ps_filetab[NewHandle] = p->ps_filetab[Handle];
Sftp->sft_count += 1;
return NewHandle;
}
else
return DE_INVLDHNDL;
}
COUNT DosForceDup(COUNT OldHandle, COUNT NewHandle)
{
psp FAR *p = MK_FP(cu_psp, 0);
sft FAR *Sftp;
/* Get the SFT block that contains the SFT */
if ((Sftp = get_sft(OldHandle)) == (sft FAR *) - 1)
return DE_INVLDHNDL;
/* If not open - exit */
if (Sftp->sft_count <= 0)
return DE_INVLDHNDL;
/* now close the new handle if it's open */
if ((UBYTE) p->ps_filetab[NewHandle] != 0xff)
{
COUNT ret;
if ((ret = DosClose(NewHandle)) != SUCCESS)
return ret;
}
/* If everything looks ok, bump it up. */
if ((Sftp->sft_flags & SFT_FDEVICE) || (Sftp->sft_status >= 0))
{
p->ps_filetab[NewHandle] = p->ps_filetab[OldHandle];
Sftp->sft_count += 1;
return NewHandle;
}
else
return DE_INVLDHNDL;
}
COUNT DosOpen(BYTE FAR * fname, COUNT mode)
{
psp FAR *p = MK_FP(cu_psp, 0);
WORD hndl;
WORD sft_idx;
sft FAR *sftp;
struct dhdr FAR *dhp;
BYTE FAR *froot;
WORD i;
/* test if mode is in range */
if ((mode & ~SFT_OMASK) != 0)
return DE_INVLDACC;
mode &= 3;
/* get a free handle */
if ((hndl = get_free_hndl()) == 0xff)
return DE_TOOMANY;
OpenMode = (BYTE) mode;
/* now get a free system file table entry */
if ((sftp = get_free_sft((WORD FAR *) & sft_idx)) == (sft FAR *) - 1)
return DE_TOOMANY;
/* check for a device */
froot = get_root(fname);
for (i = 0; i < FNAME_SIZE; i++)
{
if (*froot != '\0' && *froot != '.')
PriPathName[i] = *froot++;
else
break;
}
for (; i < FNAME_SIZE; i++)
PriPathName[i] = ' ';
/* if we have an extension, can't be a device */
if (*froot != '.')
{
for (dhp = (struct dhdr FAR *)&nul_dev; dhp != (struct dhdr FAR *)-1; dhp = dhp->dh_next)
{
if (fnmatch((BYTE FAR *) PriPathName, (BYTE FAR *) dhp->dh_name, FNAME_SIZE, FALSE))
{
sftp->sft_count += 1;
sftp->sft_mode = mode;
sftp->sft_attrib = 0;
sftp->sft_flags =
((dhp->dh_attr & ~SFT_MASK) & ~SFT_FSHARED) | SFT_FDEVICE | SFT_FEOF;
sftp->sft_psp = cu_psp;
fbcopy((BYTE FAR *) PriPathName, sftp->sft_name, FNAME_SIZE + FEXT_SIZE);
sftp->sft_dev = dhp;
sftp->sft_date = dos_getdate();
sftp->sft_time = dos_gettime();
p->ps_filetab[hndl] = sft_idx;
return hndl;
}
}
}
if (Remote_OCT(REM_OPEN, fname, mode, sftp) == 0)
{
if (sftp->sft_flags & SFT_FSHARED)
{
sftp->sft_count += 1;
p->ps_filetab[hndl] = sft_idx;
return hndl;
}
}
sftp->sft_status = dos_open(fname, mode);
if (sftp->sft_status >= 0)
{
struct f_node FAR *fnp = xlt_fd(sftp->sft_status);
sftp->sft_attrib = fnp->f_dir.dir_attrib;
/* Check permissions. -- JPP */
if ((sftp->sft_attrib & (D_DIR | D_VOLID)) ||
((sftp->sft_attrib & D_RDONLY) && (mode != O_RDONLY)))
{
return DE_ACCESS;
}
p->ps_filetab[hndl] = sft_idx;
sftp->sft_count += 1;
sftp->sft_mode = mode;
sftp->sft_attrib = 0;
sftp->sft_flags = 0;
sftp->sft_psp = cu_psp;
DosGetFile(fname, sftp->sft_name);
return hndl;
}
else
return sftp->sft_status;
}
COUNT DosClose(COUNT hndl)
{
psp FAR *p = MK_FP(cu_psp, 0);
sft FAR *s;
/* Test that the handle is valid */
if (hndl < 0)
return DE_INVLDHNDL;
/* Get the SFT block that contains the SFT */
if ((s = get_sft(hndl)) == (sft FAR *) - 1)
return DE_INVLDHNDL;
/* If this is not opened another error */
if (s->sft_count == 0)
return DE_ACCESS;
lpCurSft = (sfttbl FAR *) s;
/*
remote sub sft_count.
*/
if (s->sft_flags & SFT_FSHARED)
{
int2f_Remote_call(REM_CLOSE, 0, 0, 0, (VOID FAR *) s, 0, 0);
p->ps_filetab[hndl] = 0xff;
s->sft_flags = 0;
return SUCCESS;
}
/* now just drop the count if a device, else */
/* call file system handler */
if (s->sft_flags & SFT_FDEVICE)
{
p->ps_filetab[hndl] = 0xff;
s->sft_count -= 1;
return SUCCESS;
}
else
{
p->ps_filetab[hndl] = 0xff;
s->sft_count -= 1;
if (s->sft_count > 0)
return SUCCESS;
else
return dos_close(s->sft_status);
}
}
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 DosGetCuDir(COUNT drive, BYTE FAR * s)
{
REG struct cds FAR *cdsp;
/* next - "log" in the drive */
drive = (drive == 0 ? default_drive : drive - 1);
cdsp = &CDSp->cds_table[drive];
current_ldt = cdsp;
if (cdsp->cdsFlags & 0x8000)
{
dos_pwd(cdsp, s);
return SUCCESS;
}
/* first check for valid drive */
if (cdsp->cdsDpb == 0)
return DE_INVLDDRV;
/* if (drive < 0 || drive > nblkdev)
return DE_INVLDDRV;
*/
dos_pwd(cdsp, s);
return SUCCESS;
}
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;
}
COUNT DosFindFirst(UCOUNT attr, BYTE FAR * name)
{
SAttr = (BYTE) attr;
return dos_findfirst(attr, name);
}
COUNT DosFindNext(void)
{
return dos_findnext();
}
COUNT DosGetFtime(COUNT hndl, date FAR * dp, time FAR * tp)
{
sft FAR *s;
sfttbl FAR *sp;
/* Test that the handle is valid */
if (hndl < 0)
return DE_INVLDHNDL;
/* Get the SFT block that contains the SFT */
if ((s = get_sft(hndl)) == (sft FAR *) - 1)
return DE_INVLDHNDL;
/* If this is not opened another error */
if (s->sft_count == 0)
return DE_ACCESS;
/* If SFT entry refers to a device, return the date and time of opening */
if (s->sft_flags & (SFT_FDEVICE | SFT_FSHARED))
{
*dp = s->sft_date;
*tp = s->sft_time;
return SUCCESS;
}
/* call file system handler */
return dos_getftime(s->sft_status, dp, tp);
}
COUNT DosSetFtime(COUNT hndl, date FAR * dp, time FAR * tp)
{
sft FAR *s;
sfttbl FAR *sp;
/* Test that the handle is valid */
if (hndl < 0)
return DE_INVLDHNDL;
/* Get the SFT block that contains the SFT */
if ((s = get_sft(hndl)) == (sft FAR *) - 1)
return DE_INVLDHNDL;
/* If this is not opened another error */
if (s->sft_count == 0)
return DE_ACCESS;
/* If SFT entry refers to a device, do nothing */
if (s->sft_flags & SFT_FDEVICE)
return SUCCESS;
if (s->sft_flags & SFT_FSHARED)
{
s->sft_date = *dp;
s->sft_time = *tp;
return SUCCESS;
}
/* call file system handler */
return dos_setftime(s->sft_status, dp, tp);
}
COUNT DosGetFattr(BYTE FAR * name, UWORD FAR * attrp)
{
if (Remote_GSattr(REM_GETATTRZ, name, attrp) == 0)
return SUCCESS;
return dos_getfattr(name, attrp);
}
COUNT DosSetFattr(BYTE FAR * name, UWORD FAR * attrp)
{
if (Remote_GSattr(REM_SETATTR, name, attrp) == 0)
return SUCCESS;
return dos_setfattr(name, attrp);
}
BYTE DosSelectDrv(BYTE drv)
{
if (CDSp->cds_table[drv].cdsFlags & 0xf000)
{
current_ldt = &CDSp->cds_table[drv];
default_drive = drv;
}
return lastdrive;
}
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