src/include/nonposix.h

   1 /* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
   2    Free Software Foundation, Inc.
   3      Written by Eli Zaretskii (eliz@is.elta.co.il)
   4
   5 This file is part of groff.
   6
   7 groff is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with groff; see the file COPYING.  If not, write to the Free Software
  19 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  20
  21 /* This header file compartmentalize all idiosyncrasies of non-Posix
  22    systems, such as MS-DOS, MS-Windows, etc.  It should be loaded after
  23    the system headers like stdio.h to protect against warnings and error
  24    messages w.r.t. redefining macros. */
  25
  26 #if defined _MSC_VER
  27 # ifndef _WIN32
  28 #  define _WIN32
  29 # endif
  30 #endif
  31
  32 #if defined(__MSDOS__) || defined(__EMX__) \
  33     || (defined(_WIN32) && !defined(_UWIN) && !defined(__CYGWIN__))
  34
  35 /* Binary I/O nuisances. */
  36 # include <fcntl.h>
  37 # include <io.h>
  38 # ifdef HAVE_UNISTD_H
  39 #  include <unistd.h>
  40 # endif
  41 # ifndef STDIN_FILENO
  42 #  define STDIN_FILENO  0
  43 #  define STDOUT_FILENO 1
  44 #  define STDERR_FILENO 2
  45 # endif
  46 # ifdef HAVE_DIRECT_H
  47 #  include <direct.h>
  48 # endif
  49 # ifdef HAVE_PROCESS_H
  50 #  include <process.h>
  51 # endif
  52 # if defined(_MSC_VER) || defined(__MINGW32__)
  53 #  define POPEN_RT      "rt"
  54 #  define POPEN_WT      "wt"
  55 #  define popen(c,m)    _popen(c,m)
  56 #  define pclose(p)     _pclose(p)
  57 #  define pipe(pfd)     _pipe((pfd),0,_O_BINARY|_O_NOINHERIT)
  58 #  define mkdir(p,m)    _mkdir(p)
  59 #  define setmode(f,m)  _setmode(f,m)
  60 #  define WAIT(s,p,m)   _cwait(s,p,m)
  61 #  define creat(p,m)    _creat(p,m)
  62 #  define read(f,b,s)   _read(f,b,s)
  63 #  define write(f,b,s)  _write(f,b,s)
  64 #  define dup(f)        _dup(f)
  65 #  define dup2(f1,f2)   _dup2(f1,f2)
  66 #  define close(f)      _close(f)
  67 #  define isatty(f)     _isatty(f)
  68 #  define access(p,m)   _access(p,m)
  69 # endif
  70 # define SET_BINARY(f)  do {if (!isatty(f)) setmode(f,O_BINARY);} while(0)
  71 # define FOPEN_RB       "rb"
  72 # define FOPEN_WB       "wb"
  73 # define FOPEN_RWB      "wb+"
  74 # ifndef O_BINARY
  75 #  ifdef _O_BINARY
  76 #   define O_BINARY     (_O_BINARY)
  77 #  endif
  78 # endif
  79
  80 /* The system shell.  Groff assumes a Unixy shell, but non-Posix
  81    systems don't have standard places where it lives, and might not
  82    have it installed to begin with.  We want to give them some leeway.  */
  83 # ifdef __EMX__
  84 #  define getcwd(b,s)   _getcwd2(b,s)
  85 # else
  86 #  define BSHELL        (system_shell_name())
  87 #  define BSHELL_DASH_C (system_shell_dash_c())
  88 #  define IS_BSHELL(s)  (is_system_shell(s))
  89 # endif
  90
  91 /* The separator for directories in PATH and other environment
  92    variables.  */
  93 # define PATH_SEP       ";"
  94 # define PATH_SEP_CHAR  ';'
  95
  96 /* Characters that separate directories in a path name.  */
  97 # define DIR_SEPS       "/\\:"
  98
  99 /* How to tell if the argument is an absolute file name.  */
 100 # define IS_ABSOLUTE(f) \
 101  ((f)[0] == '/' || (f)[0] == '\\' || (f)[0] && (f)[1] == ':')
 102
 103 /* The executable extension.  */
 104 # define EXE_EXT        ".exe"
 105
 106 /* Possible executable extensions.  */
 107 # define PATH_EXT       ".com;.exe;.bat;.cmd"
 108
 109 /* The system null device.  */
 110 # define NULL_DEV       "NUL"
 111
 112 /* The default place to create temporary files.  */
 113 # ifndef P_tmpdir
 114 #  ifdef _P_tmpdir
 115 #   define P_tmpdir     _P_tmpdir
 116 #  else
 117 #   define P_tmpdir     "c:/temp"
 118 #  endif
 119 # endif
 120
 121 /* Prototypes.  */
 122 # ifdef __cplusplus
 123   extern "C" {
 124 # endif
 125     char       * system_shell_name(void);
 126     const char * system_shell_dash_c(void);
 127     int          is_system_shell(const char *);
 128 # ifdef __cplusplus
 129   }
 130 # endif
 131
 132 #endif
 133
 134 #if defined(_WIN32) && !defined(_UWIN) && !defined(__CYGWIN__)
 135 /* Win32 implementations which use the Microsoft runtime library
 136  * are prone to hanging when a pipe reader quits with unread data in the pipe.
 137  * `gtroff' avoids this, by invoking `FLUSH_INPUT_PIPE()', defined as ... */
 138 # define FLUSH_INPUT_PIPE(fd)                 \
 139  do if (!isatty(fd))                          \
 140  {                                            \
 141    char drain[BUFSIZ];                        \
 142    while (read(fd, drain, sizeof(drain)) > 0) \
 143      ;                                        \
 144  } while (0)
 145
 146 /* The Microsoft runtime library also has a broken argument passing mechanism,
 147  * which may result in improper grouping of arguments passed to a child process
 148  * by the `spawn()' family of functions.  In `groff', only the `spawnvp()'
 149  * function is affected; we work around this defect, by substituting a
 150  * wrapper function in place of `spawnvp()' calls. */
 151
 152 # ifdef __cplusplus
 153   extern "C" {
 154 # endif
 155   int spawnvp_wrapper(int, char *, char **);
 156 # ifdef __cplusplus
 157   }
 158 # endif
 159 # ifndef SPAWN_FUNCTION_WRAPPERS
 160 #  undef  spawnvp
 161 #  define spawnvp      spawnvp_wrapper
 162 #  undef  _spawnvp
 163 #  define _spawnvp     spawnvp
 164 # endif /* SPAWN_FUNCTION_WRAPPERS */
 165
 166 #else
 167 /* Other implementations do not suffer from Microsoft runtime bugs,
 168  * but `gtroff' requires a dummy definition for FLUSH_INPUT_PIPE() */
 169 # define FLUSH_INPUT_PIPE(fd)   do {} while(0)
 170 #endif
 171
 172 /* Defaults, for Posix systems.  */
 173
 174 #ifndef SET_BINARY
 175 # define SET_BINARY(f)  do {} while(0)
 176 #endif
 177 #ifndef FOPEN_RB
 178 # define FOPEN_RB       "r"
 179 #endif
 180 #ifndef FOPEN_WB
 181 # define FOPEN_WB       "w"
 182 #endif
 183 #ifndef FOPEN_RWB
 184 # define FOPEN_RWB      "w+"
 185 #endif
 186 #ifndef POPEN_RT
 187 # define POPEN_RT       "r"
 188 #endif
 189 #ifndef POPEN_WT
 190 # define POPEN_WT       "w"
 191 #endif
 192 #ifndef O_BINARY
 193 # define O_BINARY       0
 194 #endif
 195 #ifndef BSHELL
 196 # define BSHELL         "/bin/sh"
 197 #endif
 198 #ifndef BSHELL_DASH_C
 199 # define BSHELL_DASH_C  "-c"
 200 #endif
 201 #ifndef IS_BSHELL
 202 # define IS_BSHELL(s)   ((s) && strcmp(s,BSHELL) == 0)
 203 #endif
 204 #ifndef PATH_SEP
 205 # define PATH_SEP       ":"
 206 # define PATH_SEP_CHAR  ':'
 207 #endif
 208 #ifndef DIR_SEPS
 209 # define DIR_SEPS       "/"
 210 #endif
 211 #ifndef IS_ABSOLUTE
 212 # define IS_ABSOLUTE(f) ((f)[0] == '/')
 213 #endif
 214 #ifndef EXE_EXT
 215 # define EXE_EXT        ""
 216 #endif
 217 #ifndef PATH_EXT
 218 # define PATH_EXT       ""
 219 #endif
 220 #ifndef NULL_DEV
 221 # define NULL_DEV       "/dev/null"
 222 #endif
 223 #ifndef GS_NAME
 224 # define GS_NAME        "gs"
 225 #endif
 226 #ifndef WAIT
 227 # define WAIT(s,p,m)    wait(s)
 228 #endif
 229 #ifndef _WAIT_CHILD
 230 # define _WAIT_CHILD    0
 231 #endif