include/nonposix.h

   1 /*@ This header file compartmentalize all idiosyncrasies of non-Posix
   2  *@ systems, such as MS-DOS, MS-Windows, etc.  It should be loaded after
   3  *@ the system headers like stdio.h to protect against warnings and error
   4  *@ messages w.r.t. redefining macros.
   5  *
   6  * Copyright (c) 2014 - 2017 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   7  *
   8  * Copyright (C) 2000 - 2005
   9  *    Free Software Foundation, Inc.
  10  *      Written by Eli Zaretskii (eliz@is.elta.co.il)
  11  *
  12  * This is free software; you can redistribute it and/or modify it under
  13  * the terms of the GNU General Public License as published by the Free
  14  * Software Foundation; either version 2, or (at your option) any later
  15  * version.
  16  *
  17  * This is distributed in the hope that it will be useful, but WITHOUT ANY
  18  * WARRANTY; without even the implied warranty of MERCHANTABILITY or
  19  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  * for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License along
  23  * with groff; see the file COPYING.  If not, write to the Free Software
  24  * Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA.
  25  */
  26 #ifndef _NONPOSIX_H
  27 #define _NONPOSIX_H
  28
  29 #include "config.h"
  30
  31 #if defined _MSC_VER
  32 # ifndef _WIN32
  33 #  define _WIN32
  34 # endif
  35 #endif
  36
  37 #if defined(__MSDOS__) || defined(__EMX__) \
  38     || (defined(_WIN32) && !defined(_UWIN) && !defined(__CYGWIN__))
  39
  40 /* Binary I/O nuisances. */
  41 # include <fcntl.h>
  42 # include <io.h>
  43 # ifdef HAVE_UNISTD_H
  44 #  include <unistd.h>
  45 # endif
  46 # ifndef STDIN_FILENO
  47 #  define STDIN_FILENO  0
  48 #  define STDOUT_FILENO 1
  49 #  define STDERR_FILENO 2
  50 # endif
  51 # ifdef HAVE_DIRECT_H
  52 #  include <direct.h>
  53 # endif
  54 # ifdef HAVE_PROCESS_H
  55 #  include <process.h>
  56 # endif
  57 # if defined(_MSC_VER) || defined(__MINGW32__)
  58 #  define POPEN_RT      "rt"
  59 #  define POPEN_WT      "wt"
  60 #  define popen(c,m)    _popen(c,m)
  61 #  define pclose(p)     _pclose(p)
  62 #  define pipe(pfd)     _pipe((pfd),0,_O_BINARY|_O_NOINHERIT)
  63 #  define mkdir(p,m)    _mkdir(p)
  64 #  define setmode(f,m)  _setmode(f,m)
  65 #  define WAIT(s,p,m)   _cwait(s,p,m)
  66 #  define creat(p,m)    _creat(p,m)
  67 #  define read(f,b,s)   _read(f,b,s)
  68 #  define write(f,b,s)  _write(f,b,s)
  69 #  define dup(f)        _dup(f)
  70 #  define dup2(f1,f2)   _dup2(f1,f2)
  71 #  define close(f)      _close(f)
  72 #  define isatty(f)     _isatty(f)
  73 #  define access(p,m)   _access(p,m)
  74 # endif
  75 # define SET_BINARY(f)  do {if (!isatty(f)) setmode(f,O_BINARY);} while(0)
  76 # define FOPEN_RB       "rb"
  77 # define FOPEN_WB       "wb"
  78 # define FOPEN_RWB      "wb+"
  79 # ifndef O_BINARY
  80 #  ifdef _O_BINARY
  81 #   define O_BINARY     (_O_BINARY)
  82 #  endif
  83 # endif
  84
  85 /* The system shell.  Groff assumes a Unixy shell, but non-Posix
  86    systems don't have standard places where it lives, and might not
  87    have it installed to begin with.  We want to give them some leeway.  */
  88 # ifdef __EMX__
  89 #  define getcwd(b,s)   _getcwd2(b,s)
  90 # else
  91 #  define BSHELL        (system_shell_name())
  92 #  define BSHELL_DASH_C (system_shell_dash_c())
  93 #  define IS_BSHELL(s)  (is_system_shell(s))
  94 # endif
  95
  96 /* The separator for directories in PATH and other environment
  97    variables.  */
  98 # define PATH_SEP       ";"
  99 # define PATH_SEP_CHAR  ';'
 100
 101 /* Characters that separate directories in a path name.  */
 102 # define DIR_SEPS       "/\\:"
 103
 104 /* How to tell if the argument is an absolute file name.  */
 105 # define IS_ABSOLUTE(f) \
 106  ((f)[0] == '/' || (f)[0] == '\\' || (f)[0] && (f)[1] == ':')
 107
 108 /* The executable extension.  */
 109 # define EXE_EXT        ".exe"
 110
 111 /* Possible executable extensions.  */
 112 # define PATH_EXT       ".com;.exe;.bat;.cmd"
 113
 114 /* The system null device.  */
 115 # define NULL_DEV       "NUL"
 116
 117 /* The default place to create temporary files.  */
 118 # ifndef P_tmpdir
 119 #  ifdef _P_tmpdir
 120 #   define P_tmpdir     _P_tmpdir
 121 #  else
 122 #   define P_tmpdir     "c:/temp"
 123 #  endif
 124 # endif
 125
 126 /* Prototypes.  */
 127 # ifdef __cplusplus
 128   extern "C" {
 129 # endif
 130     char       * system_shell_name(void);
 131     const char * system_shell_dash_c(void);
 132     int          is_system_shell(const char *);
 133 # ifdef __cplusplus
 134   }
 135 # endif
 136
 137 #endif
 138
 139 #if defined(_WIN32) && !defined(_UWIN) && !defined(__CYGWIN__)
 140 /* Win32 implementations which use the Microsoft runtime library
 141  * are prone to hanging when a pipe reader quits with unread data in the pipe.
 142  * `gtroff' avoids this, by invoking `FLUSH_INPUT_PIPE()', defined as ... */
 143 # define FLUSH_INPUT_PIPE(fd)                 \
 144  do if (!isatty(fd))                          \
 145  {                                            \
 146    char drain[BUFSIZ];                        \
 147    while (read(fd, drain, sizeof(drain)) > 0) \
 148      ;                                        \
 149  } while (0)
 150
 151 /* The Microsoft runtime library also has a broken argument passing mechanism,
 152  * which may result in improper grouping of arguments passed to a child process
 153  * by the `spawn()' family of functions.  In `groff', only the `spawnvp()'
 154  * function is affected; we work around this defect, by substituting a
 155  * wrapper function in place of `spawnvp()' calls. */
 156
 157 # ifdef __cplusplus
 158   extern "C" {
 159 # endif
 160   int spawnvp_wrapper(int, char *, char **);
 161 # ifdef __cplusplus
 162   }
 163 # endif
 164 # ifndef SPAWN_FUNCTION_WRAPPERS
 165 #  undef  spawnvp
 166 #  define spawnvp      spawnvp_wrapper
 167 #  undef  _spawnvp
 168 #  define _spawnvp     spawnvp
 169 # endif /* SPAWN_FUNCTION_WRAPPERS */
 170
 171 #else
 172 /* Other implementations do not suffer from Microsoft runtime bugs,
 173  * but `gtroff' requires a dummy definition for FLUSH_INPUT_PIPE() */
 174 # define FLUSH_INPUT_PIPE(fd)   do {} while(0)
 175 #endif
 176
 177 /* Defaults, for Posix systems.  */
 178
 179 #ifndef SET_BINARY
 180 # define SET_BINARY(f)  do {} while(0)
 181 #endif
 182 #ifndef FOPEN_RB
 183 # define FOPEN_RB       "r"
 184 #endif
 185 #ifndef FOPEN_WB
 186 # define FOPEN_WB       "w"
 187 #endif
 188 #ifndef FOPEN_RWB
 189 # define FOPEN_RWB      "w+"
 190 #endif
 191 #ifndef POPEN_RT
 192 # define POPEN_RT       "r"
 193 #endif
 194 #ifndef POPEN_WT
 195 # define POPEN_WT       "w"
 196 #endif
 197 #ifndef O_BINARY
 198 # define O_BINARY       0
 199 #endif
 200 #ifndef BSHELL
 201 # define BSHELL         "/bin/sh"
 202 #endif
 203 #ifndef BSHELL_DASH_C
 204 # define BSHELL_DASH_C  "-c"
 205 #endif
 206 #ifndef IS_BSHELL
 207 # define IS_BSHELL(s)   ((s) && strcmp(s,BSHELL) == 0)
 208 #endif
 209 #ifndef PATH_SEP
 210 # define PATH_SEP       ":"
 211 # define PATH_SEP_CHAR  ':'
 212 #endif
 213 #ifndef DIR_SEPS
 214 # define DIR_SEPS       "/"
 215 #endif
 216 #ifndef IS_ABSOLUTE
 217 # define IS_ABSOLUTE(f) ((f)[0] == '/')
 218 #endif
 219 #ifndef EXE_EXT
 220 # define EXE_EXT        ""
 221 #endif
 222 #ifndef PATH_EXT
 223 # define PATH_EXT       ""
 224 #endif
 225 #ifndef NULL_DEV
 226 # define NULL_DEV       "/dev/null"
 227 #endif
 228 #ifndef GS_NAME
 229 # define GS_NAME        "gs"
 230 #endif
 231 #ifndef WAIT
 232 # define WAIT(s,p,m)    wait(s)
 233 #endif
 234 #ifndef _WAIT_CHILD
 235 # define _WAIT_CHILD    0
 236 #endif
 237
 238 #endif // _NONPOSIX_H
 239 // s-it2-mode