src/dosfns.c

   1 /* MS-DOS specific Lisp utilities.  Coded by Manabu Higashida, 1991.
   2    Major changes May-July 1993 Morten Welinder (only 10% original code left)
   3    Copyright (C) 1991, 1993, 1996-1998, 2001-2013 Free Software
   4    Foundation, Inc.
   5
   6 This file is part of GNU Emacs.
   7
   8 GNU Emacs is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation, either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 GNU Emacs is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include <config.h>
  22
  23 #ifdef MSDOS
  24 /* The entire file is within this conditional */
  25
  26 #include <stdio.h>
  27 /* gettime and settime in dos.h clash with their namesakes from
  28    gnulib, so we move out of our way the prototypes in dos.h.  */
  29 #define gettime dos_h_gettime_
  30 #define settime dos_h_settime_
  31 #include <dos.h>
  32 #undef gettime
  33 #undef settime
  34
  35 #include "lisp.h"
  36 #include "character.h"
  37 #include "buffer.h"
  38 #include "termchar.h"
  39 #include "frame.h"
  40 #include "termhooks.h"
  41 #include "blockinput.h"
  42 #include "window.h"
  43 #include "dosfns.h"
  44 #include "msdos.h"
  45 #include "dispextern.h"
  46 #include "coding.h"
  47 #include "process.h"
  48 #include <dpmi.h>
  49 #include <go32.h>
  50 #include <dirent.h>
  51 #include <sys/vfs.h>
  52 #include <unistd.h>
  53 #include <grp.h>
  54 #include <crt0.h>
  55
  56 DEFUN ("int86", Fint86, Sint86, 2, 2, 0,
  57        doc: /* Call specific MS-DOS interrupt number INTERRUPT with REGISTERS.
  58 Return the updated REGISTER vector.
  59
  60 INTERRUPT should be an integer in the range 0 to 255.
  61 REGISTERS should be a vector produced by `make-register' and
  62 `set-register-value'.  */)
  63   (Lisp_Object interrupt, Lisp_Object registers)
  64 {
  65   register int i;
  66   int no;
  67   union REGS inregs, outregs;
  68
  69   CHECK_NUMBER (interrupt);
  70   no = (unsigned long) XINT (interrupt);
  71   CHECK_VECTOR (registers);
  72   if (no < 0 || no > 0xff || ASIZE (registers) != 8)
  73     return Qnil;
  74   for (i = 0; i < 8; i++)
  75     CHECK_NUMBER (AREF (registers, i));
  76
  77   inregs.x.ax    = (unsigned long) XFASTINT (AREF (registers, 0));
  78   inregs.x.bx    = (unsigned long) XFASTINT (AREF (registers, 1));
  79   inregs.x.cx    = (unsigned long) XFASTINT (AREF (registers, 2));
  80   inregs.x.dx    = (unsigned long) XFASTINT (AREF (registers, 3));
  81   inregs.x.si    = (unsigned long) XFASTINT (AREF (registers, 4));
  82   inregs.x.di    = (unsigned long) XFASTINT (AREF (registers, 5));
  83   inregs.x.cflag = (unsigned long) XFASTINT (AREF (registers, 6));
  84   inregs.x.flags = (unsigned long) XFASTINT (AREF (registers, 7));
  85
  86   int86 (no, &inregs, &outregs);
  87
  88   ASET (registers, 0, make_number (outregs.x.ax));
  89   ASET (registers, 1, make_number (outregs.x.bx));
  90   ASET (registers, 2, make_number (outregs.x.cx));
  91   ASET (registers, 3, make_number (outregs.x.dx));
  92   ASET (registers, 4, make_number (outregs.x.si));
  93   ASET (registers, 5, make_number (outregs.x.di));
  94   ASET (registers, 6, make_number (outregs.x.cflag));
  95   ASET (registers, 7, make_number (outregs.x.flags));
  96
  97   return registers;
  98 }
  99
 100 DEFUN ("msdos-memget", Fdos_memget, Sdos_memget, 2, 2, 0,
 101        doc: /* Read DOS memory at offset ADDRESS into VECTOR.
 102 Return the updated VECTOR.  */)
 103   (Lisp_Object address, Lisp_Object vector)
 104 {
 105   register int i;
 106   int offs, len;
 107   char *buf;
 108
 109   CHECK_NUMBER (address);
 110   offs = (unsigned long) XINT (address);
 111   CHECK_VECTOR (vector);
 112   len = ASIZE (vector);
 113   if (len < 1 || len > 2048 || offs < 0 || offs > 0xfffff - len)
 114     return Qnil;
 115   buf = alloca (len);
 116   dosmemget (offs, len, buf);
 117
 118   for (i = 0; i < len; i++)
 119     ASET (vector, i, make_number (buf[i]));
 120
 121   return vector;
 122 }
 123
 124 DEFUN ("msdos-memput", Fdos_memput, Sdos_memput, 2, 2, 0,
 125        doc: /* Write DOS memory at offset ADDRESS from VECTOR.  */)
 126   (Lisp_Object address, Lisp_Object vector)
 127 {
 128   register int i;
 129   int offs, len;
 130   char *buf;
 131
 132   CHECK_NUMBER (address);
 133   offs = (unsigned long) XINT (address);
 134   CHECK_VECTOR (vector);
 135   len = ASIZE (vector);
 136   if (len < 1 || len > 2048 || offs < 0 || offs > 0xfffff - len)
 137     return Qnil;
 138   buf = alloca (len);
 139
 140   for (i = 0; i < len; i++)
 141     {
 142       CHECK_NUMBER (AREF (vector, i));
 143       buf[i] = (unsigned char) XFASTINT (AREF (vector, i)) & 0xFF;
 144     }
 145
 146   dosmemput (buf, len, offs);
 147   return Qt;
 148 }
 149
 150 DEFUN ("msdos-set-keyboard", Fmsdos_set_keyboard, Smsdos_set_keyboard, 1, 2, 0,
 151        doc: /* Set keyboard layout according to COUNTRY-CODE.
 152 If the optional argument ALLKEYS is non-nil, the keyboard is mapped for
 153 all keys; otherwise it is only used when the ALT key is pressed.
 154 The current keyboard layout is available in dos-keyboard-code.  */)
 155   (Lisp_Object country_code, Lisp_Object allkeys)
 156 {
 157   CHECK_NUMBER (country_code);
 158   if (!dos_set_keyboard (XINT (country_code), !NILP (allkeys)))
 159     return Qnil;
 160   return Qt;
 161 }
 162
 163 #ifndef HAVE_X_WINDOWS
 164 /* Later we might want to control the mouse interface with this function,
 165    e.g., with respect to non-80 column screen modes.  */
 166
 167 DEFUN ("msdos-mouse-p", Fmsdos_mouse_p, Smsdos_mouse_p, 0, 0, 0,
 168        doc: /* Report whether a mouse is present.  */)
 169   (void)
 170 {
 171   if (have_mouse)
 172     return Qt;
 173   else
 174     return Qnil;
 175 }
 176 #endif
 177
 178 DEFUN ("msdos-mouse-init", Fmsdos_mouse_init, Smsdos_mouse_init, 0, 0, "",
 179        doc: /* Initialize and enable mouse if available.  */)
 180   (void)
 181 {
 182   if (have_mouse)
 183     {
 184       have_mouse = 1;
 185       mouse_init ();
 186       return Qt;
 187     }
 188   return Qnil;
 189 }
 190
 191 DEFUN ("msdos-mouse-enable", Fmsdos_mouse_enable, Smsdos_mouse_enable, 0, 0, "",
 192        doc: /* Enable mouse if available.  */)
 193   (void)
 194 {
 195   if (have_mouse)
 196     {
 197       have_mouse = 1;
 198       mouse_on ();
 199     }
 200   return have_mouse ? Qt : Qnil;
 201 }
 202
 203 DEFUN ("msdos-mouse-disable", Fmsdos_mouse_disable, Smsdos_mouse_disable, 0, 0, "",
 204        doc: /* Disable mouse if available.  */)
 205   (void)
 206 {
 207   mouse_off ();
 208   if (have_mouse) have_mouse = -1;
 209   return Qnil;
 210 }
 211
 212 DEFUN ("insert-startup-screen", Finsert_startup_screen, Sinsert_startup_screen, 0, 0, "",
 213        doc: /* Insert copy of screen contents prior to starting Emacs.
 214 Return nil if startup screen is not available.  */)
 215   (void)
 216 {
 217   char *s;
 218   int rows, cols, i, j;
 219
 220   if (!dos_get_saved_screen (&s, &rows, &cols))
 221     return Qnil;
 222
 223   for (i = 0; i < rows; i++)
 224     {
 225       for (j = 0; j < cols; j++)
 226         {
 227           insert_char (*s);
 228           s += 2;
 229         }
 230       insert_char ('\n');
 231     }
 232
 233   return Qt;
 234 }
 235 \f
 236 unsigned char dos_country_info[DOS_COUNTRY_INFO];
 237 static unsigned char usa_country_info[DOS_COUNTRY_INFO] = {
 238   0, 0,                         /* date format */
 239   '$', 0, 0, 0, 0,              /* currency string */
 240   ',', 0,                       /* thousands separator */
 241   '.', 0,                       /* decimal separator */
 242   '/', 0,                       /* date separator */
 243   ':', 0,                       /* time separator */
 244   0,                            /* currency format */
 245   2,                            /* digits after decimal in currency */
 246   0,                            /* time format */
 247   0, 0, 0, 0,                   /* address of case map routine, GPF if used */
 248   ' ', 0,                       /* data-list separator (?) */
 249   0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* reserved */
 250 };
 251
 252 #ifndef HAVE_X_WINDOWS
 253 static unsigned dos_windows_version;
 254 char parent_vm_title[50];       /* Ralf Brown says 30 is enough */
 255 int w95_set_virtual_machine_title (const char *);
 256
 257 void
 258 restore_parent_vm_title (void)
 259 {
 260   if (NILP (Vdos_windows_version))
 261     return;
 262   if ((dos_windows_version & 0xff) >= 4 && parent_vm_title[0])
 263     w95_set_virtual_machine_title (parent_vm_title);
 264   delay (50);
 265 }
 266 #endif /* !HAVE_X_WINDOWS */
 267
 268 void
 269 init_dosfns (void)
 270 {
 271   union REGS regs;
 272   _go32_dpmi_registers dpmiregs;
 273   unsigned long xbuf = _go32_info_block.linear_address_of_transfer_buffer;
 274
 275 #ifndef SYSTEM_MALLOC
 276   extern void get_lim_data (void);
 277
 278   get_lim_data (); /* why the hell isn't this called elsewhere? */
 279 #endif
 280
 281   regs.x.ax = 0x3000;
 282   intdos (&regs, &regs);
 283   Vdos_version = Fcons (make_number (regs.h.al), make_number (regs.h.ah));
 284
 285   /* Obtain the country code via DPMI, use DJGPP transfer buffer.  */
 286   dpmiregs.x.ax = 0x3800;
 287   dpmiregs.x.ds = xbuf >> 4;
 288   dpmiregs.x.dx = 0;
 289   dpmiregs.x.ss = dpmiregs.x.sp = dpmiregs.x.flags = 0;
 290   _go32_dpmi_simulate_int (0x21, &dpmiregs);
 291   if (dpmiregs.x.flags & 1)
 292     {
 293       dos_country_code = 1;     /* assume USA if 213800 failed */
 294       memcpy (dos_country_info, usa_country_info, DOS_COUNTRY_INFO);
 295     }
 296   else
 297     {
 298       dos_country_code = dpmiregs.x.bx;
 299       dosmemget (xbuf, DOS_COUNTRY_INFO, dos_country_info);
 300     }
 301
 302   dos_set_keyboard (dos_country_code, 0);
 303
 304   regs.x.ax = 0x6601;
 305   intdos (&regs, &regs);
 306   if (regs.x.cflag)
 307     /* Estimate code page from country code */
 308     switch (dos_country_code)
 309       {
 310       case 45: /* Denmark */
 311       case 47: /* Norway */
 312         dos_codepage = 865;
 313         break;
 314       default:
 315         /* US */
 316         dos_codepage = 437;
 317       }
 318   else
 319     dos_codepage = regs.x.bx & 0xffff;
 320
 321 #ifndef HAVE_X_WINDOWS
 322   parent_vm_title[0] = '\0';
 323
 324   /* If we are running from DOS box on MS-Windows, get Windows version.  */
 325   dpmiregs.x.ax = 0x1600;       /* enhanced mode installation check */
 326   dpmiregs.x.ss = dpmiregs.x.sp = dpmiregs.x.flags = 0;
 327   _go32_dpmi_simulate_int (0x2f, &dpmiregs);
 328   /* We only support Windows-specific features when we run on Windows 9X
 329      or on Windows 3.X/enhanced mode.
 330
 331      Int 2Fh/AX=1600h returns:
 332
 333      AL = 00:  no Windows at all;
 334      AL = 01:  Windows/386 2.x;
 335      AL = 80h: Windows 3.x in mode other than enhanced;
 336      AL = FFh: Windows/386 2.x
 337
 338      We also check AH > 0 (Windows 3.1 or later), in case AL tricks us.  */
 339   if (dpmiregs.h.al > 2 && dpmiregs.h.al != 0x80 && dpmiregs.h.al != 0xff
 340       && (dpmiregs.h.al > 3 || dpmiregs.h.ah > 0))
 341     {
 342       dos_windows_version = dpmiregs.x.ax;
 343       Vdos_windows_version =
 344         Fcons (make_number (dpmiregs.h.al), make_number (dpmiregs.h.ah));
 345
 346       /* Save the current title of this virtual machine, so we can restore
 347          it before exiting.  Otherwise, Windows 95 will continue to use
 348          the title we set even after we are history, stupido...  */
 349       if (dpmiregs.h.al >= 4)
 350         {
 351           dpmiregs.x.ax = 0x168e;
 352           dpmiregs.x.dx = 3;    /* get VM title */
 353           dpmiregs.x.cx = sizeof (parent_vm_title) - 1;
 354           dpmiregs.x.es = __tb >> 4;
 355           dpmiregs.x.di = __tb & 15;
 356           dpmiregs.x.sp = dpmiregs.x.ss = dpmiregs.x.flags = 0;
 357           _go32_dpmi_simulate_int (0x2f, &dpmiregs);
 358           if (dpmiregs.x.ax == 1)
 359             dosmemget (__tb, sizeof (parent_vm_title), parent_vm_title);
 360         }
 361     }
 362   else
 363     {
 364       dos_windows_version = 0;
 365       Vdos_windows_version = Qnil;
 366     }
 367 #endif /* !HAVE_X_WINDOWS */
 368
 369   /* Without this, we never see hidden files.
 370      Don't OR it with the previous value, so the value recorded at dump
 371      time, possibly with `preserve-case' flags set, won't get through.  */
 372   __opendir_flags = __OPENDIR_FIND_HIDDEN;
 373
 374 #if __DJGPP_MINOR__ == 0
 375   /* Under LFN, preserve the case of files as recorded in the directory
 376      (in DJGPP 2.01 and later this is automagically done by the library).  */
 377   if (!NILP (Fmsdos_long_file_names ()))
 378     __opendir_flags |= __OPENDIR_PRESERVE_CASE;
 379 #endif /* __DJGPP_MINOR__ == 0 */
 380 }
 381 \f
 382 #ifndef HAVE_X_WINDOWS
 383
 384 /* Emulation of some X window features from xfns.c and xfaces.c.  */
 385
 386 /* Standard VGA colors, in the order of their standard numbering
 387    in the default VGA palette.  */
 388 static char *vga_colors[16] = {
 389   "black", "blue", "green", "cyan", "red", "magenta", "brown",
 390   "lightgray", "darkgray", "lightblue", "lightgreen", "lightcyan",
 391   "lightred", "lightmagenta", "yellow", "white"
 392 };
 393
 394 /* Given a color name, return its index, or -1 if not found.  Note
 395    that this only performs case-insensitive comparison against the
 396    standard names.  For anything more sophisticated, like matching
 397    "gray" with "grey" or translating X color names into their MSDOS
 398    equivalents, call the Lisp function Qtty_color_desc (defined
 399    on lisp/term/tty-colors.el).  */
 400 int
 401 msdos_stdcolor_idx (const char *name)
 402 {
 403   int i;
 404
 405   for (i = 0; i < sizeof (vga_colors) / sizeof (vga_colors[0]); i++)
 406     if (xstrcasecmp (name, vga_colors[i]) == 0)
 407       return i;
 408
 409   return
 410     strcmp (name, unspecified_fg) == 0 ? FACE_TTY_DEFAULT_FG_COLOR
 411     : strcmp (name, unspecified_bg) == 0 ? FACE_TTY_DEFAULT_BG_COLOR
 412     : FACE_TTY_DEFAULT_COLOR;
 413 }
 414
 415 /* Given a color index, return its standard name.  */
 416 Lisp_Object
 417 msdos_stdcolor_name (int idx)
 418 {
 419   extern Lisp_Object Qunspecified;
 420
 421   if (idx == FACE_TTY_DEFAULT_FG_COLOR)
 422     return build_string (unspecified_fg);
 423   else if (idx == FACE_TTY_DEFAULT_BG_COLOR)
 424     return build_string (unspecified_bg);
 425   else if (idx >= 0 && idx < sizeof (vga_colors) / sizeof (vga_colors[0]))
 426     return build_string (vga_colors[idx]);
 427   else
 428     return Qunspecified;        /* meaning the default */
 429 }
 430
 431 /* Support for features that are available when we run in a DOS box
 432    on MS-Windows.  */
 433 int
 434 ms_windows_version (void)
 435 {
 436   return dos_windows_version;
 437 }
 438
 439 /* Set the title of the current virtual machine, to appear on
 440    the caption bar of that machine's window.  */
 441
 442 int
 443 w95_set_virtual_machine_title (const char *title_string)
 444 {
 445   /* Only Windows 9X (version 4 and higher) support this function.  */
 446   if (!NILP (Vdos_windows_version)
 447       && (dos_windows_version & 0xff) >= 4)
 448     {
 449       _go32_dpmi_registers regs;
 450       dosmemput (title_string, strlen (title_string) + 1, __tb);
 451       regs.x.ax = 0x168e;
 452       regs.x.dx = 1;
 453       regs.x.es = __tb >> 4;
 454       regs.x.di = __tb & 15;
 455       regs.x.sp = regs.x.ss = regs.x.flags = 0;
 456       _go32_dpmi_simulate_int (0x2f, &regs);
 457       return regs.x.ax == 1;
 458     }
 459   return 0;
 460 }
 461
 462 /* Change the title of frame F to NAME.
 463    If NAME is nil, use the frame name as the title.
 464
 465    If Emacs is not run from a DOS box on Windows 9X, this only
 466    sets the name in the frame struct, but has no other effects.  */
 467
 468 void
 469 x_set_title (struct frame *f, Lisp_Object name)
 470 {
 471   /* Don't change the title if it's already NAME.  */
 472   if (EQ (name, f->title))
 473     return;
 474
 475   update_mode_lines = 1;
 476
 477   fset_title (f, name);
 478
 479   if (NILP (name))
 480     name = f->name;
 481
 482   if (FRAME_MSDOS_P (f))
 483     {
 484       block_input ();
 485       w95_set_virtual_machine_title (SDATA (name));
 486       unblock_input ();
 487     }
 488 }
 489 #endif /* !HAVE_X_WINDOWS */
 490 \f
 491 DEFUN ("file-system-info", Ffile_system_info, Sfile_system_info, 1, 1, 0,
 492        doc: /* Return storage information about the file system FILENAME is on.
 493 Value is a list of floats (TOTAL FREE AVAIL), where TOTAL is the total
 494 storage of the file system, FREE is the free storage, and AVAIL is the
 495 storage available to a non-superuser.  All 3 numbers are in bytes.
 496 If the underlying system call fails, value is nil.  */)
 497   (Lisp_Object filename)
 498 {
 499   struct statfs stfs;
 500   Lisp_Object encoded, value;
 501
 502   CHECK_STRING (filename);
 503   filename = Fexpand_file_name (filename, Qnil);
 504   encoded = ENCODE_FILE (filename);
 505
 506   if (statfs (SDATA (encoded), &stfs))
 507     value = Qnil;
 508   else
 509     value = list3 (make_float ((double) stfs.f_bsize * stfs.f_blocks),
 510                    make_float ((double) stfs.f_bsize * stfs.f_bfree),
 511                    make_float ((double) stfs.f_bsize * stfs.f_bavail));
 512
 513   return value;
 514 }
 515 \f
 516 /* System depended enumeration of and access to system processes a-la
 517    ps(1).  Here, we only return info about the running Emacs process.
 518    (There are no other processes on DOS, right?)  */
 519
 520 Lisp_Object
 521 list_system_processes (void)
 522 {
 523   Lisp_Object proclist = Qnil;
 524
 525   proclist = Fcons (make_fixnum_or_float (getpid ()), proclist);
 526
 527   return proclist;
 528 }
 529
 530 Lisp_Object
 531 system_process_attributes (Lisp_Object pid)
 532 {
 533   int proc_id;
 534   Lisp_Object attrs = Qnil;
 535
 536   CHECK_NUMBER_OR_FLOAT (pid);
 537   proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
 538
 539   if (proc_id == getpid ())
 540     {
 541       EMACS_INT uid, gid;
 542       char *usr;
 543       struct group *gr;
 544       char cmd[FILENAME_MAX];
 545       char *cmdline = NULL, *p, *q;
 546       size_t cmdline_size = 0;
 547       int i;
 548       Lisp_Object cmd_str, decoded_cmd, tem;
 549       double pmem;
 550 #ifndef SYSTEM_MALLOC
 551       extern unsigned long ret_lim_data ();
 552 #endif
 553
 554       uid = getuid ();
 555       attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid)), attrs);
 556       usr = getlogin ();
 557       if (usr)
 558         attrs = Fcons (Fcons (Quser, build_string (usr)), attrs);
 559       gid = getgid ();
 560       attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid)), attrs);
 561       gr = getgrgid (gid);
 562       if (gr)
 563         attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
 564       strcpy (cmd, basename (__crt0_argv[0]));
 565       /* Command name is encoded in locale-coding-system; decode it.  */
 566       cmd_str = build_unibyte_string (cmd);
 567       decoded_cmd = code_convert_string_norecord (cmd_str,
 568                                                   Vlocale_coding_system, 0);
 569       attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
 570       /* Pretend we have 0 as PPID.  */
 571       attrs = Fcons (Fcons (Qppid, make_number (0)), attrs);
 572       attrs = Fcons (Fcons (Qpgrp, pid), attrs);
 573       attrs = Fcons (Fcons (Qttname, build_string ("/dev/tty")), attrs);
 574       /* We are never idle!  */
 575       tem = Fget_internal_run_time ();
 576       attrs = Fcons (Fcons (Qtime, tem), attrs);
 577       attrs = Fcons (Fcons (Qthcount, make_number (1)), attrs);
 578       attrs = Fcons (Fcons (Qstart,
 579                             Fsymbol_value (intern ("before-init-time"))),
 580                      attrs);
 581       attrs = Fcons (Fcons (Qvsize,
 582                             make_fixnum_or_float ((unsigned long)sbrk (0)/1024)),
 583                      attrs);
 584       attrs = Fcons (Fcons (Qetime, tem), attrs);
 585 #ifndef SYSTEM_MALLOC
 586       /* ret_lim_data is on vm-limit.c, which is not compiled in under
 587          SYSTEM_MALLOC.  */
 588       pmem = (double)((unsigned long) sbrk (0)) / ret_lim_data () * 100.0;
 589       if (pmem > 100)
 590 #endif
 591         pmem = 100;
 592       attrs = Fcons (Fcons (Qpmem, make_float (pmem)), attrs);
 593       /* Pass 1: Count how much storage we need.  */
 594       for (i = 0; i < __crt0_argc; i++)
 595         {
 596           cmdline_size += strlen (__crt0_argv[i]) + 1; /* +1 for blank delim */
 597           if (strpbrk (__crt0_argv[i], " \t\n\r\v\f"))
 598             {
 599               cmdline_size += 2;
 600               for (p = __crt0_argv[i]; *p; p++)
 601                 {
 602                   if (*p == '"')
 603                     cmdline_size++;
 604                 }
 605             }
 606         }
 607       /* Pass 2: Allocate storage and concatenate argv[].  */
 608       cmdline = xmalloc (cmdline_size + 1);
 609       for (i = 0, q = cmdline; i < __crt0_argc; i++)
 610         {
 611           if (strpbrk (__crt0_argv[i], " \t\n\r\v\f"))
 612             {
 613               *q++ = '"';
 614               for (p = __crt0_argv[i]; *p; p++)
 615                 {
 616                   if (*p == '\"')
 617                     *q++ = '\\';
 618                   *q++ = *p;
 619                 }
 620               *q++ = '"';
 621             }
 622           else
 623             {
 624               strcpy (q, __crt0_argv[i]);
 625               q += strlen (__crt0_argv[i]);
 626             }
 627           *q++ = ' ';
 628         }
 629       /* Remove the trailing blank.  */
 630       if (q > cmdline)
 631         q[-1] = '\0';
 632
 633       /* Command line is encoded in locale-coding-system; decode it.  */
 634       cmd_str = build_unibyte_string (cmdline);
 635       decoded_cmd = code_convert_string_norecord (cmd_str,
 636                                                   Vlocale_coding_system, 0);
 637       xfree (cmdline);
 638       attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
 639     }
 640
 641   return attrs;
 642 }
 643 \f
 644 void
 645 dos_cleanup (void)
 646 {
 647   struct tty_display_info *tty;
 648
 649 #ifndef HAVE_X_WINDOWS
 650   restore_parent_vm_title ();
 651 #endif
 652   /* Make sure the termscript file is committed, in case we are
 653      crashing and some vital info was written there.  */
 654   if (FRAMEP (selected_frame))
 655     {
 656       struct frame *sf = XFRAME (selected_frame);
 657
 658       if (FRAME_LIVE_P (sf)
 659           && (FRAME_MSDOS_P (sf) || FRAME_TERMCAP_P (sf)))
 660         {
 661           tty = CURTTY ();
 662           if (tty->termscript)
 663             {
 664               fflush (tty->termscript);
 665               fsync (fileno (tty->termscript));
 666             }
 667         }
 668     }
 669 }
 670
 671 /*
 672  *      Define everything
 673  */
 674 void
 675 syms_of_dosfns (void)
 676 {
 677   defsubr (&Sint86);
 678   defsubr (&Sdos_memget);
 679   defsubr (&Sdos_memput);
 680   defsubr (&Smsdos_mouse_init);
 681   defsubr (&Smsdos_mouse_enable);
 682   defsubr (&Smsdos_set_keyboard);
 683   defsubr (&Sinsert_startup_screen);
 684   defsubr (&Smsdos_mouse_disable);
 685   defsubr (&Sfile_system_info);
 686 #ifndef HAVE_X_WINDOWS
 687   defsubr (&Smsdos_mouse_p);
 688 #endif
 689
 690   DEFVAR_INT ("dos-country-code", dos_country_code,
 691               doc: /* The country code returned by Dos when Emacs was started.
 692 Usually this is the international telephone prefix.  */);
 693
 694   DEFVAR_INT ("dos-codepage", dos_codepage,
 695               doc: /* The codepage active when Emacs was started.
 696 The following are known:
 697         437     United States
 698         850     Multilingual (Latin I)
 699         852     Slavic (Latin II)
 700         857     Turkish
 701         860     Portugal
 702         861     Iceland
 703         863     Canada (French)
 704         865     Norway/Denmark  */);
 705
 706   DEFVAR_INT ("dos-timezone-offset", dos_timezone_offset,
 707               doc: /* The current timezone offset to UTC in minutes.
 708 Implicitly modified when the TZ variable is changed.  */);
 709
 710   DEFVAR_LISP ("dos-version", Vdos_version,
 711                doc: /* The (MAJOR . MINOR) Dos version (subject to modification with setver).  */);
 712
 713 #ifndef HAVE_X_WINDOWS
 714   DEFVAR_LISP ("dos-windows-version", Vdos_windows_version,
 715                doc: /* The (MAJOR . MINOR) Windows version for DOS session on MS-Windows.  */);
 716 #endif
 717
 718   DEFVAR_LISP ("dos-display-scancodes", Vdos_display_scancodes,
 719                doc: /* Whether DOS raw keyboard events are displayed as you type.
 720 When non-nil, the keyboard scan-codes are displayed at the bottom right
 721 corner of the display (typically at the end of the mode line).
 722 The output format is: scan code:char code*modifiers.  */);
 723
 724   Vdos_display_scancodes = Qnil;
 725
 726   DEFVAR_INT ("dos-hyper-key", dos_hyper_key,
 727               doc: /* If set to 1, use right ALT key as hyper key.
 728 If set to 2, use right CTRL key as hyper key.  */);
 729   dos_hyper_key = 0;
 730
 731   DEFVAR_INT ("dos-super-key", dos_super_key,
 732               doc: /* If set to 1, use right ALT key as super key.
 733 If set to 2, use right CTRL key as super key.  */);
 734   dos_super_key = 0;
 735
 736   DEFVAR_INT ("dos-keypad-mode", dos_keypad_mode,
 737               doc: /* Controls what key code is returned by a key in the numeric keypad.
 738 The `numlock ON' action is only taken if no modifier keys are pressed.
 739 The value is an integer constructed by adding the following bits together:
 740
 741   0x00  Digit key returns digit    (if numlock ON)
 742   0x01  Digit key returns kp-digit (if numlock ON)
 743   0x02  Digit key returns M-digit  (if numlock ON)
 744   0x03  Digit key returns edit key (if numlock ON)
 745
 746   0x00  Grey key returns char      (if numlock ON)
 747   0x04  Grey key returns kp-key    (if numlock ON)
 748
 749   0x00  Digit key returns digit    (if numlock OFF)
 750   0x10  Digit key returns kp-digit (if numlock OFF)
 751   0x20  Digit key returns M-digit  (if numlock OFF)
 752   0x30  Digit key returns edit key (if numlock OFF)
 753
 754   0x00  Grey key returns char      (if numlock OFF)
 755   0x40  Grey key returns kp-key    (if numlock OFF)
 756
 757   0x200 ALT-0..ALT-9 in top-row produces shifted codes.  */);
 758   dos_keypad_mode = 0x75;
 759
 760   DEFVAR_INT ("dos-keyboard-layout", dos_keyboard_layout,
 761               doc: /* Contains the country code for the current keyboard layout.
 762 Use msdos-set-keyboard to select another keyboard layout.  */);
 763   dos_keyboard_layout = 1;      /* US */
 764
 765   DEFVAR_INT ("dos-decimal-point", dos_decimal_point,
 766               doc: /* The character to produce when kp-decimal key is pressed.
 767 If non-zero, this variable contains the character to be returned when the
 768 decimal point key in the numeric keypad is pressed when Num Lock is on.
 769 If zero, the decimal point key returns the country code specific value.  */);
 770   dos_decimal_point = 0;
 771 }
 772 #endif /* MSDOS */