system.h revision 130303
1/* system-dependent definitions for CVS. 2 Copyright (C) 1989-1992 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 2, or (at your option) 7 any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. */ 13 14#include <sys/types.h> 15#include <sys/stat.h> 16 17#ifdef STAT_MACROS_BROKEN 18#undef S_ISBLK 19#undef S_ISCHR 20#undef S_ISDIR 21#undef S_ISREG 22#undef S_ISFIFO 23#undef S_ISLNK 24#undef S_ISSOCK 25#undef S_ISMPB 26#undef S_ISMPC 27#undef S_ISNWK 28#endif 29 30/* Not all systems have S_IFMT, but we want to use it if we have it. 31 The S_IFMT code below looks right (it masks and compares). The 32 non-S_IFMT code looks bogus (are there really systems on which 33 S_IFBLK, S_IFLNK, &c, each have their own bit? I suspect it was 34 written for OS/2 using the IBM C/C++ Tools 2.01 compiler). 35 36 Of course POSIX systems will have S_IS*, so maybe the issue is 37 semi-moot. */ 38 39#if !defined(S_ISBLK) && defined(S_IFBLK) 40# if defined(S_IFMT) 41# define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) 42# else 43# define S_ISBLK(m) ((m) & S_IFBLK) 44# endif 45#endif 46 47#if !defined(S_ISCHR) && defined(S_IFCHR) 48# if defined(S_IFMT) 49# define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) 50# else 51# define S_ISCHR(m) ((m) & S_IFCHR) 52# endif 53#endif 54 55#if !defined(S_ISDIR) && defined(S_IFDIR) 56# if defined(S_IFMT) 57# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) 58# else 59# define S_ISDIR(m) ((m) & S_IFDIR) 60# endif 61#endif 62 63#if !defined(S_ISREG) && defined(S_IFREG) 64# if defined(S_IFMT) 65# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) 66# else 67# define S_ISREG(m) ((m) & S_IFREG) 68# endif 69#endif 70 71#if !defined(S_ISFIFO) && defined(S_IFIFO) 72# if defined(S_IFMT) 73# define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) 74# else 75# define S_ISFIFO(m) ((m) & S_IFIFO) 76# endif 77#endif 78 79#if !defined(S_ISLNK) && defined(S_IFLNK) 80# if defined(S_IFMT) 81# define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) 82# else 83# define S_ISLNK(m) ((m) & S_IFLNK) 84# endif 85#endif 86 87#ifndef S_ISSOCK 88# if defined( S_IFSOCK ) 89# ifdef S_IFMT 90# define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) 91# else 92# define S_ISSOCK(m) ((m) & S_IFSOCK) 93# endif /* S_IFMT */ 94# elif defined( S_ISNAM ) 95 /* SCO OpenServer 5.0.6a */ 96# define S_ISSOCK S_ISNAM 97# endif /* !S_IFSOCK && S_ISNAM */ 98#endif /* !S_ISSOCK */ 99 100#if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */ 101# if defined(S_IFMT) 102# define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB) 103# define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC) 104# else 105# define S_ISMPB(m) ((m) & S_IFMPB) 106# define S_ISMPC(m) ((m) & S_IFMPC) 107# endif 108#endif 109 110#if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */ 111# if defined(S_IFMT) 112# define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK) 113# else 114# define S_ISNWK(m) ((m) & S_IFNWK) 115# endif 116#endif 117 118#ifdef NEED_DECOY_PERMISSIONS /* OS/2, really */ 119 120#define S_IRUSR S_IREAD 121#define S_IWUSR S_IWRITE 122#define S_IXUSR S_IEXEC 123#define S_IRWXU (S_IRUSR | S_IWUSR | S_IXUSR) 124#define S_IRGRP S_IREAD 125#define S_IWGRP S_IWRITE 126#define S_IXGRP S_IEXEC 127#define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP) 128#define S_IROTH S_IREAD 129#define S_IWOTH S_IWRITE 130#define S_IXOTH S_IEXEC 131#define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH) 132 133#else /* ! NEED_DECOY_PERMISSIONS */ 134 135#ifndef S_IRUSR 136#define S_IRUSR 0400 137#define S_IWUSR 0200 138#define S_IXUSR 0100 139/* Read, write, and execute by owner. */ 140#define S_IRWXU (S_IRUSR|S_IWUSR|S_IXUSR) 141 142#define S_IRGRP (S_IRUSR >> 3) /* Read by group. */ 143#define S_IWGRP (S_IWUSR >> 3) /* Write by group. */ 144#define S_IXGRP (S_IXUSR >> 3) /* Execute by group. */ 145/* Read, write, and execute by group. */ 146#define S_IRWXG (S_IRWXU >> 3) 147 148#define S_IROTH (S_IRGRP >> 3) /* Read by others. */ 149#define S_IWOTH (S_IWGRP >> 3) /* Write by others. */ 150#define S_IXOTH (S_IXGRP >> 3) /* Execute by others. */ 151/* Read, write, and execute by others. */ 152#define S_IRWXO (S_IRWXG >> 3) 153#endif /* !def S_IRUSR */ 154#endif /* NEED_DECOY_PERMISSIONS */ 155 156#if defined(POSIX) || defined(HAVE_UNISTD_H) 157#include <unistd.h> 158#include <limits.h> 159#else 160off_t lseek (); 161char *getcwd (); 162#endif 163 164#include "xtime.h" 165 166#ifdef HAVE_IO_H 167#include <io.h> 168#endif 169 170#ifdef HAVE_DIRECT_H 171#include <direct.h> 172#endif 173 174 175 176/* 177** MAXPATHLEN and PATH_MAX 178** 179** On most systems MAXPATHLEN is defined in sys/param.h to be 1024. Of 180** those that this is not true, again most define PATH_MAX in limits.h 181** or sys/limits.h which usually gets included by limits.h. On the few 182** remaining systems that neither statement is true, _POSIX_PATH_MAX 183** is defined. 184** 185** So: 186** 1. If PATH_MAX is defined just use it. 187** 2. If MAXPATHLEN is defined but not PATH_MAX, then define 188** PATH_MAX in terms of MAXPATHLEN. 189** 3. If neither is defined, include limits.h and check for 190** PATH_MAX again. 191** 3.1 If we now have PATHSIZE, define PATH_MAX in terms of that. 192** and ignore the rest. Since _POSIX_PATH_MAX (checked for 193** next) is the *most* restrictive (smallest) value, if we 194** trust _POSIX_PATH_MAX, several of our buffers are too small. 195** 4. If PATH_MAX is still not defined but _POSIX_PATH_MAX is, 196** then define PATH_MAX in terms of _POSIX_PATH_MAX. 197** 5. And if even _POSIX_PATH_MAX doesn't exist just put in 198** a reasonable value. 199** *. All in all, this is an excellent argument for using pathconf() 200** when at all possible. Or better yet, dynamically allocate 201** our buffers and use getcwd() not getwd(). 202** 203** This works on: 204** Sun Sparc 10 SunOS 4.1.3 & Solaris 1.2 205** HP 9000/700 HP/UX 8.07 & HP/UX 9.01 206** Tektronix XD88/10 UTekV 3.2e 207** IBM RS6000 AIX 3.2 208** Dec Alpha OSF 1 ???? 209** Intel 386 BSDI BSD/386 210** Intel 386 SCO OpenServer Release 5 211** Apollo Domain 10.4 212** NEC SVR4 213*/ 214 215/* On MOST systems this will get you MAXPATHLEN. 216 Windows NT doesn't have this file, tho. */ 217#ifdef HAVE_SYS_PARAM_H 218#include <sys/param.h> 219#endif 220 221#ifndef PATH_MAX 222# ifdef MAXPATHLEN 223# define PATH_MAX MAXPATHLEN 224# else 225# include <limits.h> 226# ifndef PATH_MAX 227# ifdef PATHSIZE 228# define PATH_MAX PATHSIZE 229# else /* no PATHSIZE */ 230# ifdef _POSIX_PATH_MAX 231# define PATH_MAX _POSIX_PATH_MAX 232# else 233# define PATH_MAX 1024 234# endif /* no _POSIX_PATH_MAX */ 235# endif /* no PATHSIZE */ 236# endif /* no PATH_MAX */ 237# endif /* MAXPATHLEN */ 238#endif /* PATH_MAX */ 239 240 241/* The NeXT (without _POSIX_SOURCE, which we don't want) has a utime.h 242 which doesn't define anything. It would be cleaner to have configure 243 check for struct utimbuf, but for now I'm checking NeXT here (so I don't 244 have to debug the configure check across all the machines). */ 245#if defined (HAVE_UTIME_H) && !defined (NeXT) 246# include <utime.h> 247#else 248# if defined (HAVE_SYS_UTIME_H) 249# include <sys/utime.h> 250# else 251# ifndef ALTOS 252struct utimbuf 253{ 254 long actime; 255 long modtime; 256}; 257# endif 258int utime (); 259# endif 260#endif 261 262#include <string.h> 263 264#ifndef ERRNO_H_MISSING 265#include <errno.h> 266#endif 267 268/* Not all systems set the same error code on a non-existent-file 269 error. This tries to ask the question somewhat portably. 270 On systems that don't have ENOTEXIST, this should behave just like 271 x == ENOENT. "x" is probably errno, of course. */ 272 273#ifdef ENOTEXIST 274# ifdef EOS2ERR 275# define existence_error(x) \ 276 (((x) == ENOTEXIST) || ((x) == ENOENT) || ((x) == EOS2ERR)) 277# else 278# define existence_error(x) \ 279 (((x) == ENOTEXIST) || ((x) == ENOENT)) 280# endif 281#else 282# ifdef EVMSERR 283# define existence_error(x) \ 284((x) == ENOENT || (x) == EINVAL || (x) == EVMSERR) 285# else 286# define existence_error(x) ((x) == ENOENT) 287# endif 288#endif 289 290 291#ifdef STDC_HEADERS 292# include <stdlib.h> 293#else 294char *getenv (); 295char *malloc (); 296char *realloc (); 297char *calloc (); 298extern int errno; 299#endif 300 301/* SunOS4 apparently does not define this in stdlib.h. */ 302#ifndef EXIT_FAILURE 303# define EXIT_FAILURE 1 304#endif 305 306/* check for POSIX signals */ 307#if defined(HAVE_SIGACTION) && defined(HAVE_SIGPROCMASK) 308# define POSIX_SIGNALS 309#endif 310 311/* MINIX 1.6 doesn't properly support sigaction */ 312#if defined(_MINIX) 313# undef POSIX_SIGNALS 314#endif 315 316/* If !POSIX, try for BSD.. Reason: 4.4BSD implements these as wrappers */ 317#if !defined(POSIX_SIGNALS) 318# if defined(HAVE_SIGVEC) && defined(HAVE_SIGSETMASK) && defined(HAVE_SIGBLOCK) 319# define BSD_SIGNALS 320# endif 321#endif 322 323/* Under OS/2, this must be included _after_ stdio.h; that's why we do 324 it here. */ 325#ifdef USE_OWN_TCPIP_H 326# include "tcpip.h" 327#endif 328 329#ifdef HAVE_FCNTL_H 330# include <fcntl.h> 331#else 332# include <sys/file.h> 333#endif 334 335#ifndef SEEK_SET 336# define SEEK_SET 0 337# define SEEK_CUR 1 338# define SEEK_END 2 339#endif 340 341#ifndef F_OK 342# define F_OK 0 343# define X_OK 1 344# define W_OK 2 345# define R_OK 4 346#endif 347 348#if HAVE_DIRENT_H 349# include <dirent.h> 350# define NAMLEN(dirent) strlen((dirent)->d_name) 351#else 352# define dirent direct 353# define NAMLEN(dirent) (dirent)->d_namlen 354# if HAVE_SYS_NDIR_H 355# include <sys/ndir.h> 356# endif 357# if HAVE_SYS_DIR_H 358# include <sys/dir.h> 359# endif 360# if HAVE_NDIR_H 361# include <ndir.h> 362# endif 363#endif 364 365/* Convert B 512-byte blocks to kilobytes if K is nonzero, 366 otherwise return it unchanged. */ 367#define convert_blocks(b, k) ((k) ? ((b) + 1) / 2 : (b)) 368 369#ifndef S_ISLNK 370# define lstat stat 371#endif 372 373/* 374 * Some UNIX distributions don't include these in their stat.h Defined here 375 * because "config.h" is always included last. 376 */ 377#ifndef S_IWRITE 378# define S_IWRITE 0000200 /* write permission, owner */ 379#endif 380#ifndef S_IWGRP 381# define S_IWGRP 0000020 /* write permission, grougroup */ 382#endif 383#ifndef S_IWOTH 384# define S_IWOTH 0000002 /* write permission, other */ 385#endif 386 387/* Under non-UNIX operating systems (MS-DOS, WinNT, MacOS), many filesystem 388 calls take only one argument; permission is handled very differently on 389 those systems than in Unix. So we leave such systems a hook on which they 390 can hang their own definitions. */ 391 392#ifndef CVS_ACCESS 393# define CVS_ACCESS access 394#endif 395 396#ifndef CVS_CHDIR 397# define CVS_CHDIR chdir 398#endif 399 400#ifndef CVS_CREAT 401# define CVS_CREAT creat 402#endif 403 404#ifndef CVS_FOPEN 405# define CVS_FOPEN fopen 406#endif 407 408#ifndef CVS_FDOPEN 409# define CVS_FDOPEN fdopen 410#endif 411 412#ifndef CVS_MKDIR 413# define CVS_MKDIR mkdir 414#endif 415 416#ifndef CVS_OPEN 417# define CVS_OPEN open 418#endif 419 420#ifndef CVS_READDIR 421# define CVS_READDIR readdir 422#endif 423 424#ifndef CVS_CLOSEDIR 425# define CVS_CLOSEDIR closedir 426#endif 427 428#ifndef CVS_OPENDIR 429# define CVS_OPENDIR opendir 430#endif 431 432#ifndef CVS_RENAME 433# define CVS_RENAME rename 434#endif 435 436#ifndef CVS_RMDIR 437# define CVS_RMDIR rmdir 438#endif 439 440#ifndef CVS_STAT 441# define CVS_STAT stat 442#endif 443 444/* Open question: should CVS_STAT be lstat by default? We need 445 to use lstat in order to handle symbolic links correctly with 446 the PreservePermissions option. -twp */ 447#ifndef CVS_LSTAT 448# define CVS_LSTAT lstat 449#endif 450 451#ifndef CVS_UNLINK 452# define CVS_UNLINK unlink 453#endif 454 455/* Wildcard matcher. Should be case-insensitive if the system is. */ 456#ifndef CVS_FNMATCH 457# define CVS_FNMATCH fnmatch 458#endif 459 460#ifdef WIN32 461/* 462 * According to GNU conventions, we should avoid referencing any macro 463 * containing "WIN" as a reference to Microsoft Windows, as we would like to 464 * avoid any implication that we consider Microsoft Windows any sort of "win". 465 * 466 * FIXME: As of 2003-06-09, folks on the GNULIB project were discussing 467 * defining a configure macro to define WOE32 appropriately. If they ever do 468 * write such a beast, we should use it, though in most cases it would be 469 * preferable to avoid referencing any OS or compiler anyhow, per Autoconf 470 * convention, and reference only tested features of the system. 471 */ 472# define WOE32 1 473#endif /* WIN32 */ 474 475 476#ifdef WOE32 477 /* Under Windows NT, filenames are case-insensitive. */ 478# define FILENAMES_CASE_INSENSITIVE 1 479#endif /* WOE32 */ 480 481 482 483#ifdef FILENAMES_CASE_INSENSITIVE 484 485# if defined (__CYGWIN32__) || defined (WOE32) 486 /* Under Windows, filenames are case-insensitive, and both / and \ 487 are path component separators. */ 488# define FOLD_FN_CHAR(c) (WNT_filename_classes[(unsigned char) (c)]) 489extern unsigned char WNT_filename_classes[]; 490 /* Is the character C a path name separator? Under 491 Windows NT, you can use either / or \. */ 492# define ISDIRSEP(c) (FOLD_FN_CHAR(c) == '/') 493# define ISABSOLUTE(s) (ISDIRSEP(s[0]) || FOLD_FN_CHAR(s[0]) >= 'a' && FOLD_FN_CHAR(s[0]) <= 'z' && s[1] == ':' && ISDIRSEP(s[2])) 494# else /* ! WOE32 */ 495 /* As far as I know, just Macintosh OS X can make it here, 496 * but since the OS X fold just folds a-z into A-Z or visa-versa, I'm just 497 * allowing it to be used for any case insensitive system which we aren't 498 * yet making other specific folds or exceptions for (basically, anything 499 * case insensitive other than Windows, where \ and C:\ style absolute paths 500 * also need to be accounted for). 501 * 502 * Under Mac OS X, filenames are case-insensitive. 503 */ 504# define FOLD_FN_CHAR(c) (OSX_filename_classes[(unsigned char) (c)]) 505extern unsigned char OSX_filename_classes[]; 506# endif /* __CYGWIN32__ || WOE32 */ 507 508/* The following need to be declared for all case insensitive filesystems. 509 * When not FOLD_FN_CHAR is not #defined, a default definition for these 510 * functions is provided later in this header file. */ 511 512/* Like strcmp, but with the appropriate tweaks for file names. */ 513extern int fncmp (const char *n1, const char *n2); 514 515/* Fold characters in FILENAME to their canonical forms. */ 516extern void fnfold (char *FILENAME); 517 518#endif /* FILENAMES_CASE_INSENSITIVE */ 519 520 521 522/* Some file systems are case-insensitive. If FOLD_FN_CHAR is 523 #defined, it maps the character C onto its "canonical" form. In a 524 case-insensitive system, it would map all alphanumeric characters 525 to lower case. Under Windows NT, / and \ are both path component 526 separators, so FOLD_FN_CHAR would map them both to /. */ 527#ifndef FOLD_FN_CHAR 528# define FOLD_FN_CHAR(c) (c) 529# define fnfold(filename) (filename) 530# define fncmp strcmp 531#endif 532 533/* Different file systems have different path component separators. 534 For the VMS port we might need to abstract further back than this. */ 535#ifndef ISDIRSEP 536# define ISDIRSEP(c) ((c) == '/') 537#endif 538 539/* Different file systems can have different naming patterns which designate 540 * a path as absolute 541 */ 542#ifndef ISABSOLUTE 543# define ISABSOLUTE(s) ISDIRSEP(s[0]) 544#endif 545 546 547/* On some systems, we have to be careful about writing/reading files 548 in text or binary mode (so in text mode the system can handle CRLF 549 vs. LF, VMS text file conventions, &c). We decide to just always 550 be careful. That way we don't have to worry about whether text and 551 binary differ on this system. We just have to worry about whether 552 the system has O_BINARY and "rb". The latter is easy; all ANSI C 553 libraries have it, SunOS4 has it, and CVS has used it unguarded 554 some places for a while now without complaints (e.g. "rb" in 555 server.c (server_updated), since CVS 1.8). The former is just an 556 #ifdef. */ 557 558#define FOPEN_BINARY_READ ("rb") 559#define FOPEN_BINARY_WRITE ("wb") 560#define FOPEN_BINARY_READWRITE ("r+b") 561 562#ifdef O_BINARY 563#define OPEN_BINARY (O_BINARY) 564#else 565#define OPEN_BINARY (0) 566#endif 567