1 /* system.h: system-dependent declarations; include this first. 2 $Id: system.h,v 1.6 2024/08/16 22:57:03 guenther Exp $ 3 4 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software 5 Foundation, Inc. 6 7 This program 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 2, or (at your option) 10 any later version. 11 12 This program 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 this program; if not, write to the Free Software Foundation, 19 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 20 21 #ifndef TEXINFO_SYSTEM_H 22 #define TEXINFO_SYSTEM_H 23 24 #define _GNU_SOURCE 25 26 #include <config.h> 27 28 #ifdef MIKTEX 29 #include <gnu-miktex.h> 30 #define S_ISDIR(x) ((x)&_S_IFDIR) 31 #else 32 /* MiKTeX defines substring() in a separate DLL, where it has its 33 own __declspec declaration. We don't want to try to duplicate 34 this Microsoft-ism here. */ 35 extern char *substring (const char *, const char *); 36 #endif 37 38 /* We follow the order of header inclusion from Autoconf's 39 ac_includes_default, more or less. */ 40 #include <stdio.h> 41 #include <sys/types.h> 42 #include <ctype.h> 43 44 /* All systems nowadays probably have these functions, but ... */ 45 #ifdef HAVE_LOCALE_H 46 #include <locale.h> 47 #endif 48 #ifndef HAVE_SETLOCALE 49 #define setlocale(category,locale) /* empty */ 50 #endif 51 52 /* For gettext (NLS). */ 53 #define const 54 #include "gettext.h" 55 #undef const 56 57 #define _(String) gettext (String) 58 #define N_(String) (String) 59 60 #ifdef STDC_HEADERS 61 #define getopt system_getopt 62 #include <stdlib.h> 63 #include <unistd.h> 64 #undef getopt 65 #else 66 extern char *getenv (); 67 #endif 68 69 /* Don't use bcopy! Use memmove if source and destination may overlap, 70 memcpy otherwise. */ 71 #if HAVE_STRING_H 72 # if !STDC_HEADERS && HAVE_MEMORY_H 73 # include <memory.h> 74 # endif 75 # include <string.h> 76 #endif 77 78 #if HAVE_STRINGS_H 79 /* Always include <strings.h> if we have it. This is because that's 80 what Autoconf's AC_CHECK_DECL does. On IBM AIX 4.2, strncasecmp is 81 only declared in strings.h. */ 82 # include <strings.h> 83 #endif 84 85 #if !HAVE_STRNCASECMP || !HAVE_STRCASECMP 86 # include "strcase.h" 87 #endif 88 89 #if !HAVE_DECL_MEMCHR 90 char *memchr (); 91 #endif 92 93 /* <unistd.h> defines _POSIX_VERSION, but Paul Eggert points out that is 94 only supposed to be used in user code, not other system headers. */ 95 #ifdef HAVE_UNISTD_H 96 #include <unistd.h> 97 #endif /* HAVE_UNISTD_H */ 98 99 #include <errno.h> 100 #ifndef errno 101 extern int errno; 102 #endif 103 #ifdef VMS 104 #include <perror.h> 105 #endif 106 107 #ifndef HAVE_DECL_STRERROR 108 extern char *strerror (); 109 #endif 110 111 #ifdef HAVE_LIMITS_H 112 #include <limits.h> 113 #endif 114 #ifndef PATH_MAX 115 #ifndef _POSIX_PATH_MAX 116 # define _POSIX_PATH_MAX 255 117 #endif 118 #define PATH_MAX _POSIX_PATH_MAX 119 #endif 120 121 #ifndef HAVE_DECL_STRCOLL 122 extern int strcoll (); 123 #endif 124 125 #include <sys/stat.h> 126 #if STAT_MACROS_BROKEN 127 # undef S_ISDIR 128 #endif 129 #if !defined(S_ISDIR) && defined(S_IFDIR) 130 # define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR) 131 #endif 132 133 #ifdef HAVE_SYS_FILE_H 134 #include <sys/file.h> 135 #endif /* HAVE_SYS_FILE_H */ 136 137 #ifndef O_RDONLY 138 /* Since <fcntl.h> is POSIX, prefer that to <sys/fcntl.h>. 139 This also avoids some useless warnings on (at least) Linux. */ 140 #ifdef HAVE_FCNTL_H 141 #include <fcntl.h> 142 #else /* not HAVE_FCNTL_H */ 143 #ifdef HAVE_SYS_FCNTL_H 144 #include <sys/fcntl.h> 145 #endif /* not HAVE_SYS_FCNTL_H */ 146 #endif /* not HAVE_FCNTL_H */ 147 #endif /* not O_RDONLY */ 148 149 /* MS-DOS and similar non-Posix systems have some peculiarities: 150 - they distinguish between binary and text files; 151 - they use both `/' and `\\' as directory separator in file names; 152 - they can have a drive letter X: prepended to a file name; 153 - they have a separate root directory on each drive; 154 - their filesystems are case-insensitive; 155 - directories in environment variables (like INFOPATH) are separated 156 by `;' rather than `:'; 157 - text files can have their lines ended either with \n or with \r\n pairs; 158 These are all parameterized here except the last, which is 159 handled by the source code as appropriate (mostly, in info/). */ 160 #ifndef O_BINARY 161 # ifdef _O_BINARY 162 # define O_BINARY _O_BINARY 163 # else 164 # define O_BINARY 0 165 # endif 166 #endif /* O_BINARY */ 167 168 /* We'd like to take advantage of _doprnt if it's around, a la error.c, 169 but then we'd have no VA_SPRINTF. */ 170 #if HAVE_VPRINTF 171 # if __STDC__ 172 # include <stdarg.h> 173 # define VA_START(args, lastarg) va_start(args, lastarg) 174 # else 175 # include <varargs.h> 176 # define VA_START(args, lastarg) va_start(args) 177 # endif 178 # define VA_FPRINTF(file, fmt, ap) vfprintf (file, fmt, ap) 179 # define VA_SPRINTF(str, fmt, ap) vsprintf (str, fmt, ap) 180 #else /* not HAVE_VPRINTF */ 181 # define VA_START(args, lastarg) 182 # define va_alist a1, a2, a3, a4, a5, a6, a7, a8 183 # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8; 184 # define va_end(args) 185 #endif 186 187 #if O_BINARY 188 # ifdef HAVE_IO_H 189 # include <io.h> 190 # endif 191 # ifdef __MSDOS__ 192 # include <limits.h> 193 # ifdef __DJGPP__ 194 # define HAVE_LONG_FILENAMES(dir) (pathconf (dir, _PC_NAME_MAX) > 12) 195 # define NULL_DEVICE "/dev/null" 196 # define DEFAULT_INFOPATH "c:/djgpp/info;/usr/local/info;/usr/info;." 197 /* DJGPP supports /dev/null, which is okay for Unix aficionados, 198 shell scripts and Makefiles, but interactive DOS die-hards 199 would probably want to have NUL as well. */ 200 # define ALSO_NULL_DEVICE "NUL" 201 # else /* O_BINARY && !__DJGPP__ */ 202 # define HAVE_LONG_FILENAMES(dir) (0) 203 # define NULL_DEVICE "NUL" 204 # endif /* O_BINARY && !__DJGPP__ */ 205 # define SET_SCREEN_SIZE_HELPER terminal_prep_terminal() 206 # define DEFAULT_INFO_PRINT_COMMAND ">PRN" 207 # else /* O_BINARY && !__MSDOS__ */ 208 # define setmode(f,m) _setmode(f,m) 209 # define HAVE_LONG_FILENAMES(dir) (1) 210 # define NULL_DEVICE "NUL" 211 # endif /* O_BINARY && !__MSDOS__ */ 212 # ifdef __CYGWIN__ 213 # define DEFAULT_TMPDIR "/tmp/" 214 # define PATH_SEP ":" 215 # else /* O_BINARY && !__CYGWIN__ */ 216 # define DEFAULT_TMPDIR "c:/" 217 # define PATH_SEP ";" 218 # endif /* O_BINARY && !__CYGWIN__ */ 219 /* Back to any O_BINARY system. */ 220 # define FILENAME_CMP strcasecmp 221 # define FILENAME_CMPN strncasecmp 222 # define FOPEN_RBIN "rb" 223 # define FOPEN_WBIN "wb" 224 # define HAVE_DRIVE(n) ((n)[0] && (n)[1] == ':') 225 # define IS_SLASH(c) ((c) == '/' || (c) == '\\') 226 # define IS_ABSOLUTE(n) (IS_SLASH((n)[0]) || ((n)[0] && (n)[1] == ':')) 227 # define PIPE_USE_FORK 0 228 # define SET_BINARY(f) do {if (!isatty(f)) setmode(f,O_BINARY);} while(0) 229 # define STRIP_DOT_EXE 1 230 231 #else /* not O_BINARY, i.e., Unix */ 232 # define SET_BINARY(f) (void)0 233 # define FOPEN_RBIN "r" 234 # define FOPEN_WBIN "w" 235 # define IS_SLASH(c) ((c) == '/') 236 # define HAVE_DRIVE(n) (0) 237 # define IS_ABSOLUTE(n) ((n)[0] == '/') 238 # define FILENAME_CMP strcmp 239 # define FILENAME_CMPN strncmp 240 # define HAVE_LONG_FILENAMES(dir) (1) 241 # define PATH_SEP ":" 242 # define STRIP_DOT_EXE 0 243 # ifdef VMS 244 # define DEFAULT_TMPDIR "sys$scratch:" 245 # else 246 # define DEFAULT_TMPDIR "/tmp/" 247 # endif 248 # define NULL_DEVICE "/dev/null" 249 # define PIPE_USE_FORK 1 250 #endif /* not O_BINARY */ 251 252 /* Everything but DJGPP. */ 253 #ifndef ALSO_NULL_DEVICE 254 # define ALSO_NULL_DEVICE "" 255 #endif 256 257 #ifdef HAVE_PWD_H 258 #include <pwd.h> 259 #endif 260 /* Some systems don't declare this function in pwd.h. */ 261 struct passwd *getpwnam (const char *name); 262 263 /* Our library routines not included in any system library. */ 264 extern void *xmalloc (size_t), *xrealloc (void *, size_t); 265 extern char *xstrdup (const char *); 266 extern void xexit (int); 267 268 /* For convenience. */ 269 #define STREQ(s1,s2) (strcmp (s1, s2) == 0) 270 #define STRCASEEQ(s1,s2) (strcasecmp (s1, s2) == 0) 271 #define STRNCASEEQ(s1,s2,n) (strncasecmp (s1, s2, n) == 0) 272 273 /* We don't need anything fancy. If we did need something fancy, gnulib 274 has it. */ 275 #ifdef MIN 276 #undef MIN 277 #endif 278 #define MIN(a,b) ((a) < (b) ? (a) : (b)) 279 #ifdef MAX 280 #undef MAX 281 #endif 282 #define MAX(a,b) ((a) > (b) ? (a) : (b)) 283 284 #endif /* TEXINFO_SYSTEM_H */ 285