src/s/unixware.h

   1 /* s/ file for Unixware.
   2
   3 Copyright (C) 1999-2012  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 #include "usg5-4-common.h"
  22
  23 /* #define HAVE_GETWD  (appears to be buggy on SVR4.2) */
  24 #undef HAVE_GETWD
  25
  26 /* This is the same definition as in usg5-4-common.h, but with sigblock/sigunblock
  27    rather than sighold/sigrelse, which appear to be BSD4.1 specific.
  28    It may also be appropriate for SVR4.x
  29    (x<2) but I'm not sure.   fnf@cygnus.com */
  30 /* This sets the name of the slave side of the PTY.  On SysVr4,
  31    grantpt(3) forks a subprocess, so keep sigchld_handler() from
  32    intercepting that death.  If any child but grantpt's should die
  33    within, it should be caught after sigrelse(2).  */
  34 #define PTY_TTY_NAME_SPRINTF                    \
  35   {                                             \
  36     char *ptsname (int), *ptyname;              \
  37                                                 \
  38     sigblock(sigmask(SIGCLD));                  \
  39     if (grantpt(fd) == -1)                      \
  40       fatal("could not grant slave pty");       \
  41     sigunblock(sigmask(SIGCLD));                \
  42     if (unlockpt(fd) == -1)                     \
  43       fatal("could not unlock slave pty");      \
  44     if (!(ptyname = ptsname(fd)))               \
  45       fatal ("could not enable slave pty");     \
  46     strncpy(pty_name, ptyname, sizeof(pty_name)); \
  47     pty_name[sizeof(pty_name) - 1] = 0;         \
  48   }
  49
  50 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__ptr - (FILE)->__base)
  51
  52 /* Conservative garbage collection has not been tested, so for now
  53    play it safe and stick with the old-fashioned way of marking.  */
  54 #define GC_MARK_STACK GC_USE_GCPROS_AS_BEFORE