dns.subproj/portability.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /* portability.h - include or define things that aren't present on all systems
  25  * vixie@decwrl 26dec92 [new]
  26  *
  27  * $Id: portability.h,v 1.2 1999/10/14 21:56:45 wsanchez Exp $
  28  */
  29
  30 /*
  31  * ++Copyright++
  32  * -
  33  * Copyright (c)
  34  *    The Regents of the University of California.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  * -
  64  * Portions Copyright (c) 1993 by Digital Equipment Corporation.
  65  *
  66  * Permission to use, copy, modify, and distribute this software for any
  67  * purpose with or without fee is hereby granted, provided that the above
  68  * copyright notice and this permission notice appear in all copies, and that
  69  * the name of Digital Equipment Corporation not be used in advertising or
  70  * publicity pertaining to distribution of the document or software without
  71  * specific, written prior permission.
  72  *
  73  * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
  74  * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
  75  * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
  76  * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  77  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  78  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  79  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  80  * SOFTWARE.
  81  * -
  82  * --Copyright--
  83  */
  84
  85 /* XXX: this file has become a hopeless morass, and will be redone someday. */
  86
  87 #include <string.h>
  88 #include <sys/types.h>
  89 #include <sys/param.h>
  90 #ifndef TIME_H_INCLUDED
  91 # include <sys/time.h>
  92 # define TIME_H_INCLUDED
  93 #endif
  94
  95 #ifdef ISC
  96 # ifndef _POSIX_SOURCE
  97 #  define _POSIX_SOURCE
  98 # endif
  99 # define SYSV
 100 # define SVR3
 101 # define _SYSV3
 102 # define NEED_STRTOUL
 103 # define NEED_FTRUNCATE
 104 # define USE_POSIX
 105 # include <sys/bsdtypes.h>
 106 # include <sys/sioctl.h>
 107 # include <sys/stream.h>
 108 # include <net/errno.h>
 109 #endif
 110
 111 #if defined(__convex__)
 112 # if !defined(_POSIX_SOURCE)
 113 #  define _POSIX_SOURCE
 114 # endif
 115 # define USE_UTIME
 116 # define NEED_PUTENV
 117 #endif
 118
 119 #if defined(_CRAY)
 120 # if !defined(_POSIX_SOURCE)
 121 #  define _POSIX_SOURCE
 122 # endif
 123 # define writev(a,b,c) __writev(a,b,c)
 124 # define setitimer(a,b,c) __setitimer(a,b,c)
 125 #endif
 126
 127 /* This is defined in the Makefile for ISC compiles. */
 128 #if defined(ISC)
 129 # define ftruncate(a,b) __ftruncate(a,b)
 130 # define USE_MEMCPY
 131 # define USE_UTIME
 132 # define HAVE_FCHMOD 0
 133 #endif
 134
 135 /* SCO UNIX defines only this unique symbol, apparently. */
 136 #if defined(M_UNIX)
 137 /* XXX - why is this POSIX_SOURCE instead of _POSIX_SOURCE? */
 138 # undef POSIX_SOURCE
 139 # define POSIX_SIGNALS
 140 # define HAVE_FCHMOD 0
 141 # define writev(a,b,c) __writev(a,b,c)
 142 # define ftruncate(a,b) __ftruncate(a,b)
 143 #endif
 144
 145 #if defined(__APPLE__) && BSD < 199506
 146 # define NEED_PUTENV
 147 # define NEED_SETENV
 148 #endif
 149
 150 #if defined(__sgi)
 151 # define BSD 43
 152 # define vfork fork
 153 #endif
 154
 155 #if defined(SUNOS4)
 156 # define BSD 43
 157 #endif
 158
 159 #if defined(_AUX_SOURCE)
 160 # define vfork fork
 161 # define NEED_STRERROR
 162 # define NEED_STRTOUL
 163 # define SIG_FN void
 164 # define USE_MEMCPY
 165 #endif
 166
 167
 168 #if defined(SVR4) && !defined(SYSV)
 169 # define SYSV
 170 #endif
 171
 172 #if defined(_POSIX_SOURCE) || defined(__sgi) || defined(__ultrix) || \
 173         defined(__hpux) || (defined(BSD) && (BSD >= 199103)) || \
 174         (defined(sun) && defined(SYSV))
 175 # define USE_POSIX
 176 #endif
 177
 178 #if defined(__ultrix) && !defined(BSD)
 179 # define BSD 42
 180 #endif
 181
 182 #if defined(host_mips) && defined(SYSTYPE_BSD43)
 183 # define RISCOS_BSD
 184 #endif
 185
 186 #if defined(SYSV) || defined(__ultrix) || defined(__osf__) \
 187         || (defined(BSD) && BSD >= 199306) || defined(linux)
 188 # define USE_UTIME
 189 # define HAVE_SETVBUF
 190 #endif
 191
 192 #if defined(SYSV) && !defined(SVR4)
 193 # define vfork fork
 194 #endif
 195
 196 #if defined(sun) || defined(SVR4)
 197 # define NETREAD_BROKEN
 198 #endif
 199
 200 #if defined(BSD) && BSD >= 199006 && !defined(i386) && !defined(RISCOS_BSD)
 201 # define HAVE_DAEMON
 202 #endif
 203
 204 #if !defined(BSD) || (BSD <= 199006)
 205 # if !defined(__APPLE__)
 206 #  define NEED_INETADDR
 207 # endif
 208 # define NEED_INETATON
 209 #endif
 210
 211 #if defined(__hpux)
 212 # if defined(__STDC__)
 213 #  define select(a,b,c,d,e) select(a, (int *)b, (int *)c, (int *)d, e)
 214 #  define ctime(x) ctime((const time_t *)x)
 215 # endif /*__STDC__*/
 216 # if !defined(SYSV)
 217 #  define USE_UTIME
 218 #  define setlinebuf(x) setvbuf(x, NULL, _IOLBF, BUFSIZ)
 219 #  if !defined(SIGWINCH)  /*pre 9.0*/
 220 #   define SIGWINCH SIGWINDOW
 221 #  endif
 222 # endif /*SYSV*/
 223 /* XXX: better autodetection of the need for "struct linger" would be nice */
 224 # if 0
 225 struct  linger {
 226         int     l_onoff;                /* option on/off */
 227         int     l_linger;               /* linger time */
 228 };
 229 # endif
 230 #endif /*__hpux*/
 231
 232 #if defined(_SEQUENT_)
 233 # include <netinet/in_systm.h>
 234 # define USE_UTIME
 235 # define USE_POSIX
 236 # define NEED_GETTIMEOFDAY
 237 # define _TIMEZONE timezoneBSD
 238 struct timezoneBSD {
 239         int tz_minuteswest;
 240         int tz_dsttime;
 241 };
 242 #endif
 243
 244 #ifndef __P
 245 # if defined(__STDC__) || defined(__GNUC__)
 246 #  define __P(x) x
 247 # else
 248 #  define __P(x) ()
 249 # endif
 250 #endif
 251
 252 #ifndef _TIMEZONE
 253 # define _TIMEZONE timezone
 254 #endif
 255
 256 #if defined(USE_POSIX)
 257 # include <stdlib.h>
 258 # include <unistd.h>
 259 # include <limits.h>
 260
 261 #else
 262
 263 # define NEED_STRTOUL
 264
 265 # define STDIN_FILENO   0
 266 # define STDOUT_FILENO  1
 267 # define STDERR_FILENO  2
 268 # ifndef __APPLE__
 269 extern char *getenv __P((char *));
 270 # else
 271 extern char *getenv __P((const char *));
 272 # endif
 273 extern int errno;
 274
 275 # if !defined(DMALLOC) && !defined(__APPLE__)
 276 extern char *malloc(), *realloc(), *calloc();
 277 #  if defined(sun)
 278 extern int free();
 279 #  else
 280 extern void free();
 281 #  endif
 282 # endif
 283
 284 extern int getdtablesize __P((void));
 285 # ifdef SHORT_FNAMES
 286 extern long pathconf __P((const char *path, int name));
 287 # endif
 288
 289 #endif /*USE_POSIX*/
 290
 291 #ifndef UINT_MAX
 292 # ifdef __STDC__
 293 #  define UINT_MAX      4294967295u             /* max value of an "u_int" */
 294 # else
 295 #  define UINT_MAX      ((unsigned)4294967295)  /* max value of an "u_int" */
 296 # endif
 297 #  define ULONG_MAX     UINT_MAX        /* max decimal value of a "u_long" */
 298 #endif
 299
 300 #ifndef INT_MAX
 301 # define INT_MAX        2147483647      /* max decimal value of an "int" */
 302 #endif
 303
 304 #ifndef RAND_MAX
 305 # define RAND_MAX       0x7fffffff
 306 #endif
 307
 308 #ifndef IN_LOOPBACKNET
 309 # define IN_LOOPBACKNET 127
 310 #endif
 311
 312 #ifndef INADDR_NONE
 313 # define INADDR_NONE    0xffffffff
 314 #endif
 315
 316 #if defined(apollo)
 317                 /* Defined in /usr/include/netinet/in.h but doesn't work */
 318 #undef IP_OPTIONS
 319 #endif
 320
 321 #if !defined(__STDC__) && !defined(const)
 322 # define const /*constant*/
 323 #endif
 324
 325 #if !defined(__convex__) && (!defined(BSD) || (BSD < 199103))
 326 int      strcasecmp __P((const char *, const char *));
 327 #endif
 328
 329 /* is USE_POSIX the right thing to use here? */
 330 #if (!defined(BSD) || (BSD <= 43)) && \
 331         !defined(NeXT) && \
 332         !defined(__convex__) && \
 333         !defined(USE_POSIX)
 334 # if !defined(NCR)
 335 extern void     syslog();
 336 # endif
 337 extern char     *ctime __P((const time_t *clock));
 338 extern int      close(), setitimer(), recv(), sendto(), sigsetmask(),
 339                 atoi(), getpid(), fork(), read(), ioctl(),
 340                 setsockopt(), socket(), bind();
 341 #endif
 342
 343 #if !defined(bcopy)     /* some machines have their own macros for this */
 344 # if defined(USE_POSIX) || \
 345          (defined(__STDC__) && !defined(sun) && !defined(sequent))
 346 /* use ANSI C3.159-1989 (``ANSI C'') functions if possible;
 347  * ideally we would change the code to use them and then
 348  * define them in terms of bcopy et al if !defined(__STDC__)
 349  * but that's more work.
 350  */
 351 #if defined(USE_MEMCPY)
 352 #  define bcopy(a,b,c) memcpy(b,a,c)
 353 #else
 354 #  define bcopy(a,b,c) memmove(b,a,c)
 355 #endif
 356 #  define bzero(a,b) memset(a,0,b)
 357 #  define bcmp(a,b,c) memcmp(a,b,c)
 358 # else
 359 extern void bcopy();
 360 extern void bzero();
 361 extern int bcmp();
 362 # endif /* BSD */
 363 #endif /* bcopy */
 364
 365 #if (!defined(BSD) || (BSD < 43) || defined(RISCOS_BSD)) \
 366         && !defined(USE_POSIX) && !defined(apollo) && !defined(sequent) \
 367         && !defined(M_UNIX)
 368 # define NEED_STRERROR
 369 #if !defined(ultrix) && !defined(NCR)
 370 # define NEED_PUTENV
 371 #endif
 372 #endif
 373
 374 #if defined(SUNOS4)
 375 # define NEED_STRERROR
 376 # if defined(sun386)
 377 #  define pid_t int
 378 #  define NEED_STRCASECMP
 379 # endif
 380 #endif
 381
 382 #if (!defined(BSD) || (BSD < 43))
 383 # define NEED_MKSTEMP
 384 # if !defined(__ultrix) && !defined(apollo)
 385 #  define NEED_STRCASECMP
 386 #  define NEED_MKTEMP
 387 #  if !defined(SVR4)
 388 #   define NEED_STRPBRK
 389 #  endif
 390 # endif
 391 #endif
 392
 393 #if defined(USE_POSIX)
 394 # define POSIX_SIGNALS
 395 #endif
 396
 397 /*
 398  * Attempt to configure for type of function returned by signal-catching
 399  * functions (which signal and sigvec.sv_handler take a pointer to).
 400  * This can guess for BSD; otherwise, define SIG_FN externally.
 401  */
 402 #ifndef SIG_FN
 403 # ifdef BSD
 404 #  if (BSD >= 199006) || defined(__APPLE__) || defined(__osf__) || defined(sun) \
 405         || defined(__ultrix) || defined(apollo) || defined(POSIX_SIGNALS)
 406 #   define SIG_FN void          /* signal-catching functions return void */
 407 #  else
 408 #   define SIG_FN int           /* signal-catching functions return int */
 409 #  endif
 410 # else /*BSD*/
 411 #  define SIG_FN void           /* signal-catching functions return void */
 412 # endif /*BSD*/
 413 #endif
 414
 415 #if !defined(ntohl) && !defined(htonl) && defined(BSD) && (BSD <= 43)
 416 /* if these aren't null macros in netinet/in.h, extern them here. */
 417 extern u_short htons(), ntohs();
 418 extern u_long htonl(), ntohl();
 419 #endif
 420
 421 #if defined(USE_POSIX) && !defined(sun) && !defined(__sgi) \
 422         && !defined(__convex__) && !defined(__ultrix) && !defined(_AUX_SOURCE)
 423 # define PORT_NONBLOCK  O_NONBLOCK
 424 # define PORT_WOULDBLK  EAGAIN
 425 #else
 426 # define PORT_NONBLOCK  O_NDELAY
 427 # define PORT_WOULDBLK  EWOULDBLOCK
 428 #endif
 429
 430 #if defined(USE_POSIX)
 431 # define USE_SETSID
 432 #endif
 433
 434 #if defined(USE_POSIX) || !defined(SYSV)
 435 #define USE_WAITPID
 436 #endif
 437
 438 #if !defined(USE_POSIX)
 439 #define waitpid(x,y,z) (wait3(y,z,(struct rusage *)NULL))
 440 #endif
 441
 442 #if defined(__APPLE__) || defined(_AIX) || defined(sun386)
 443 # undef WIFEXITED
 444 # undef WEXITSTATUS
 445 # undef WIFSIGNALED
 446 # undef WTERMSIG
 447 #endif /* NeXT */
 448
 449 #if defined(sequent)
 450 #define WEXITSTATUS(x)  ((x).w_retcode)
 451 #define WTERMSIG(x)     ((x).w_termsig)
 452 #endif /* sequent */
 453
 454 #if !defined(WIFEXITED)
 455 # define WIFEXITED(x) (!(x & 0177))
 456 #endif
 457 #if !defined(WEXITSTATUS)
 458 # define WEXITSTATUS(x) (x >> 8)
 459 #endif
 460 #if !defined(WIFSIGNALED)
 461 # define WIFSIGNALED(x) ((x & 0177) && ((x & 0377) != 0177))
 462 #endif
 463 #if !defined(WTERMSIG)
 464 # define WTERMSIG(x) (x & 0177)
 465 #endif
 466
 467 #ifndef S_ISDIR
 468 # ifndef S_IFMT
 469 #  define S_IFMT 0170000
 470 # endif
 471 # ifndef S_IFDIR
 472 #  define S_IFDIR 0040000
 473 # endif
 474 # define S_ISDIR(m)     ((m & S_IFMT) == S_IFDIR)
 475 #endif
 476
 477 #ifndef S_ISREG
 478 # ifndef S_IFMT
 479 #  define S_IFMT 0170000
 480 # endif
 481 # ifndef S_IFREG
 482 #  define S_IFREG 0100000
 483 # endif
 484 # define S_ISREG(m)     ((m & S_IFMT) == S_IFREG)
 485 #endif
 486
 487 #ifndef S_ISFIFO
 488 # ifndef S_IFMT
 489 #  define S_IFMT 0170000
 490 # endif
 491 # ifndef S_IFIFO
 492 #  define S_IFIFO 0010000
 493 # endif
 494 # define S_ISFIFO(m)    ((m & S_IFMT) == S_IFIFO)
 495 #endif
 496
 497 #if defined(NEED_STRTOUL) && \
 498         (defined(__ultrix) || defined(__osf__) || defined(NeXT))
 499 # undef NEED_STRTOUL
 500 #endif
 501
 502 #if defined(__ultrix) || defined(__osf__)
 503 # define MAYBE_HESIOD
 504 #endif
 505
 506 #ifndef FD_SET
 507 #define NFDBITS         32
 508 #define FD_SETSIZE      32
 509 #define FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
 510 #define FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
 511 #define FD_ISSET(n, p)  ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
 512 #define FD_ZERO(p)      bzero((char *)(p), sizeof(*(p)))
 513 #endif
 514
 515 #ifndef MIN
 516 # define MIN(x, y)      ((x > y) ?y :x)
 517 #endif
 518 #ifndef MAX
 519 # define MAX(x, y)      ((x > y) ?x :y)
 520 #endif
 521
 522 #if !defined(PATH_MAX)
 523 # if defined(_POSIX_PATH_MAX)
 524 #  define PATH_MAX _POSIX_PATH_MAX
 525 # else
 526 #  if defined(MAXPATHLEN)
 527 #   define PATH_MAX MAXPATHLEN
 528 #  endif
 529 # endif
 530 #endif
 531
 532 #if defined(BSD) || defined(__osf__) || defined(__convex__)
 533 # define HAVE_GETRUSAGE
 534 #endif
 535
 536 /* May be set in the Makefile. */
 537 #if defined(HAVE_GETRUSAGE)
 538 # include <sys/resource.h>
 539 #endif
 540
 541 /*
 542  *  Because Convex has true library function feof() which is
 543  *  patently wrong (it test bit _IOREAD) we need feof() as
 544  *  a macro.
 545  */
 546 #if defined(__convex__) && !defined(feof)
 547 #  define   feof(p)     ((p)->_flag&_IOEOF)
 548 #endif
 549
 550 #if defined(M_UNIX) || defined(linux)
 551 # define SPURIOUS_ECONNREFUSED
 552 #endif
 553
 554 /*
 555  * Assume that a system has fchmod() unless something above says otherwise.
 556  */
 557 #if !defined(HAVE_FCHMOD)
 558 # define HAVE_FCHMOD 1
 559 #endif
 560
 561 /*
 562  * Prototype the functions we'll be supplying.
 563  */
 564 #ifdef NEED_PUTENV
 565 extern int putenv __P((char *));
 566 #endif
 567
 568 #ifdef NEED_GETTIMEOFDAY
 569 extern int gettimeofday __P((struct timeval *, struct _TIMEZONE *));
 570 #endif