FreeDOS/hdr/process.h

/****************************************************************/
/*                                                              */
/*                          process.h                           */
/*                                                              */
/*            DOS exec data structures & declarations           */
/*                                                              */
/*                      November 23, 1991                       */
/*                                                              */
/*                      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.                                    */
/****************************************************************/

#ifdef MAIN
#ifdef VERSION_STRINGS
static BYTE *process_hRcsId = "$Id$";
#endif
#endif

/*
 * $Log$
 * Revision 1.4  2000/08/06 04:18:21  jimtabor
 * See history.txt
 *
 * Revision 1.3  2000/05/25 20:56:19  jimtabor
 * Fixed project history
 *
 * Revision 1.2  2000/05/08 04:28:22  jimtabor
 * Update CVS to 2020
 *
 * Revision 1.1.1.1  2000/05/06 19:34:53  jhall1
 * The FreeDOS Kernel.  A DOS kernel that aims to be 100% compatible with
 * MS-DOS.  Distributed under the GNU GPL.
 *
 * Revision 1.1.1.1  1999/03/29 15:39:34  jprice
 * New version without IPL.SYS
 *
 * Revision 1.3  1999/02/01 01:40:06  jprice
 * Clean up
 *
 * Revision 1.2  1999/01/22 04:17:40  jprice
 * Formating
 *
 * Revision 1.1.1.1  1999/01/20 05:51:01  jprice
 * Imported sources
 *
 *
 *         Rev 1.7   22 Jan 1998 22:13:00   patv
 *      Had to change ps_prevps to VOID FAR * due to BC++ error.
 *
 *         Rev 1.6   22 Jan 1998 22:05:22   patv
 *      Corrected ps_prevpsp declaration.
 *
 *         Rev 1.5   04 Jan 1998 23:14:16   patv
 *      Changed Log for strip utility
 *
 *         Rev 1.4   29 May 1996 21:25:16   patv
 *      bug fixes for v0.91a
 *
 *         Rev 1.3   19 Feb 1996  3:15:32   patv
 *      Added NLS, int2f and config.sys processing
 *
 *         Rev 1.2   01 Sep 1995 17:35:44   patv
 *      First GPL release.
 *
 *         Rev 1.1   30 Jul 1995 20:43:50   patv
 *      Eliminated version strings in ipl
 *
 *         Rev 1.0   02 Jul 1995 10:39:52   patv
 *      Initial revision.
 */

/*  Modes available as first argument to the spawnxx functions. */

#define P_WAIT    0             /* child runs separately, parent waits until exit */
#define P_NOWAIT  1             /* both concurrent -- not implemented */
#define P_OVERLAY 2             /* child replaces parent, parent no longer exists */

typedef struct
{
  union
  {
    struct
    {
      UWORD load_seg;
      UWORD reloc;
    }
    _load;
    struct
    {
      UWORD env_seg;
      CommandTail FAR *cmd_line;
      fcb FAR *fcb_1;
      fcb FAR *fcb_2;
      BYTE FAR *stack;
      BYTE FAR *start_addr;
    }
    _exec;
  }
  ldata;
}
exec_blk;

#define exec    ldata._exec
#define load    ldata._load

typedef struct
{
  UWORD ps_exit;                /* CP/M-like exit poimt         */
  UWORD ps_size;                /* memory size in paragraphs    */
  BYTE ps_fill1;                /* single char fill             */

  /* CP/M-like entry point                                */
  BYTE ps_farcall;              /* far call opcode              */
    VOID(FAR * ps_reentry) ();  /* re-entry point          */
    VOID(interrupt FAR * ps_isv22) (),	/* terminate address */
    (interrupt FAR * ps_isv23) (),	/* break address   */
    (interrupt FAR * ps_isv24) ();	/* critical error address */
  UWORD ps_parent;              /* parent psp segment           */
  UBYTE ps_files[20];           /* file table - 0xff is unused  */
  UWORD ps_environ;             /* environment paragraph        */
  BYTE FAR *ps_stack;           /* user stack pointer - int 21  */
  WORD ps_maxfiles;             /* maximum open files           */
  UBYTE FAR *ps_filetab;        /* open file table pointer      */
  VOID FAR *ps_prevpsp;         /* previous psp pointer         */
  BYTE FAR *ps_dta;             /* process dta address          */
  BYTE ps_fill2[16];
  BYTE ps_unix[3];              /* unix style call - 0xcd 0x21 0xcb */
  BYTE ps_fill3[9];
  union
  {
    struct
    {
      fcb
      _ps_fcb1;                 /* first command line argument */
    }
    _u1;
    struct
    {
      BYTE
      fill4[16];
      fcb
      _ps_fcb2;                 /* second command line argument */
    }
    _u2;
    struct
    {
      BYTE fill5[36];
      struct
      {
        BYTE _ps_cmd_count;
        BYTE _ps_cmd[127];      /* command tail      */
      }
      _u4;
    }
    _u3;
  }
  _u;
}
psp;

#define ps_fcb1 _u._u1._ps_fcb1
#define ps_fcb2 _u._u2._ps_fcb2
#define ps_cmd  _u._u3._u4._ps_cmd
#define ps_cmd_count    _u._u3._u4._ps_cmd_count