dns.subproj/portability.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* portability.h - include or define things that aren't present on all systems
  26  * vixie@decwrl 26dec92 [new]
  27  *
  28  * $Id: portability.h,v 1.2 1999/10/14 21:56:45 wsanchez Exp $
  29  */
  30
  31 /*
  32  * ++Copyright++
  33  * -
  34  * Copyright (c)
  35  *    The Regents of the University of California.  All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. All advertising materials mentioning features or use of this software
  46  *    must display the following acknowledgement:
  47  *      This product includes software developed by the University of
  48  *      California, Berkeley and its contributors.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  * -
  65  * Portions Copyright (c) 1993 by Digital Equipment Corporation.
  66  *
  67  * Permission to use, copy, modify, and distribute this software for any
  68  * purpose with or without fee is hereby granted, provided that the above
  69  * copyright notice and this permission notice appear in all copies, and that
  70  * the name of Digital Equipment Corporation not be used in advertising or
  71  * publicity pertaining to distribution of the document or software without
  72  * specific, written prior permission.
  73  *
  74  * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
  75  * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
  76  * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
  77  * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  78  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  79  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  80  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  81  * SOFTWARE.
  82  * -
  83  * --Copyright--
  84  */
  85
  86 /* XXX: this file has become a hopeless morass, and will be redone someday. */
  87
  88 #include <string.h>
  89 #include <sys/types.h>
  90 #include <sys/param.h>
  91 #ifndef TIME_H_INCLUDED
  92 # include <sys/time.h>
  93 # define TIME_H_INCLUDED
  94 #endif
  95
  96 #ifdef ISC
  97 # ifndef _POSIX_SOURCE
  98 #  define _POSIX_SOURCE
  99 # endif
 100 # define SYSV
 101 # define SVR3
 102 # define _SYSV3
 103 # define NEED_STRTOUL
 104 # define NEED_FTRUNCATE
 105 # define USE_POSIX
 106 # include <sys/bsdtypes.h>
 107 # include <sys/sioctl.h>
 108 # include <sys/stream.h>
 109 # include <net/errno.h>
 110 #endif
 111
 112 #if defined(__convex__)
 113 # if !defined(_POSIX_SOURCE)
 114 #  define _POSIX_SOURCE
 115 # endif
 116 # define USE_UTIME
 117 # define NEED_PUTENV
 118 #endif
 119
 120 #if defined(_CRAY)
 121 # if !defined(_POSIX_SOURCE)
 122 #  define _POSIX_SOURCE
 123 # endif
 124 # define writev(a,b,c) __writev(a,b,c)
 125 # define setitimer(a,b,c) __setitimer(a,b,c)
 126 #endif
 127
 128 /* This is defined in the Makefile for ISC compiles. */
 129 #if defined(ISC)
 130 # define ftruncate(a,b) __ftruncate(a,b)
 131 # define USE_MEMCPY
 132 # define USE_UTIME
 133 # define HAVE_FCHMOD 0
 134 #endif
 135
 136 /* SCO UNIX defines only this unique symbol, apparently. */
 137 #if defined(M_UNIX)
 138 /* XXX - why is this POSIX_SOURCE instead of _POSIX_SOURCE? */
 139 # undef POSIX_SOURCE
 140 # define POSIX_SIGNALS
 141 # define HAVE_FCHMOD 0
 142 # define writev(a,b,c) __writev(a,b,c)
 143 # define ftruncate(a,b) __ftruncate(a,b)
 144 #endif
 145
 146 #if defined(__APPLE__) && BSD < 199506
 147 # define NEED_PUTENV
 148 # define NEED_SETENV
 149 #endif
 150
 151 #if defined(__sgi)
 152 # define BSD 43
 153 # define vfork fork
 154 #endif
 155
 156 #if defined(SUNOS4)
 157 # define BSD 43
 158 #endif
 159
 160 #if defined(_AUX_SOURCE)
 161 # define vfork fork
 162 # define NEED_STRERROR
 163 # define NEED_STRTOUL
 164 # define SIG_FN void
 165 # define USE_MEMCPY
 166 #endif
 167
 168
 169 #if defined(SVR4) && !defined(SYSV)
 170 # define SYSV
 171 #endif
 172
 173 #if defined(_POSIX_SOURCE) || defined(__sgi) || defined(__ultrix) || \
 174         defined(__hpux) || (defined(BSD) && (BSD >= 199103)) || \
 175         (defined(sun) && defined(SYSV))
 176 # define USE_POSIX
 177 #endif
 178
 179 #if defined(__ultrix) && !defined(BSD)
 180 # define BSD 42
 181 #endif
 182
 183 #if defined(host_mips) && defined(SYSTYPE_BSD43)
 184 # define RISCOS_BSD
 185 #endif
 186
 187 #if defined(SYSV) || defined(__ultrix) || defined(__osf__) \
 188         || (defined(BSD) && BSD >= 199306) || defined(linux)
 189 # define USE_UTIME
 190 # define HAVE_SETVBUF
 191 #endif
 192
 193 #if defined(SYSV) && !defined(SVR4)
 194 # define vfork fork
 195 #endif
 196
 197 #if defined(sun) || defined(SVR4)
 198 # define NETREAD_BROKEN
 199 #endif
 200
 201 #if defined(BSD) && BSD >= 199006 && !defined(i386) && !defined(RISCOS_BSD)
 202 # define HAVE_DAEMON
 203 #endif
 204
 205 #if !defined(BSD) || (BSD <= 199006)
 206 # if !defined(__APPLE__)
 207 #  define NEED_INETADDR
 208 # endif
 209 # define NEED_INETATON
 210 #endif
 211
 212 #if defined(__hpux)
 213 # if defined(__STDC__)
 214 #  define select(a,b,c,d,e) select(a, (int *)b, (int *)c, (int *)d, e)
 215 #  define ctime(x) ctime((const time_t *)x)
 216 # endif /*__STDC__*/
 217 # if !defined(SYSV)
 218 #  define USE_UTIME
 219 #  define setlinebuf(x) setvbuf(x, NULL, _IOLBF, BUFSIZ)
 220 #  if !defined(SIGWINCH)  /*pre 9.0*/
 221 #   define SIGWINCH SIGWINDOW
 222 #  endif
 223 # endif /*SYSV*/
 224 /* XXX: better autodetection of the need for "struct linger" would be nice */
 225 # if 0
 226 struct  linger {
 227         int     l_onoff;                /* option on/off */
 228         int     l_linger;               /* linger time */
 229 };
 230 # endif
 231 #endif /*__hpux*/
 232
 233 #if defined(_SEQUENT_)
 234 # include <netinet/in_systm.h>
 235 # define USE_UTIME
 236 # define USE_POSIX
 237 # define NEED_GETTIMEOFDAY
 238 # define _TIMEZONE timezoneBSD
 239 struct timezoneBSD {
 240         int tz_minuteswest;
 241         int tz_dsttime;
 242 };
 243 #endif
 244
 245 #ifndef __P
 246 # if defined(__STDC__) || defined(__GNUC__)
 247 #  define __P(x) x
 248 # else
 249 #  define __P(x) ()
 250 # endif
 251 #endif
 252
 253 #ifndef _TIMEZONE
 254 # define _TIMEZONE timezone
 255 #endif
 256
 257 #if defined(USE_POSIX)
 258 # include <stdlib.h>
 259 # include <unistd.h>
 260 # include <limits.h>
 261
 262 #else
 263
 264 # define NEED_STRTOUL
 265
 266 # define STDIN_FILENO   0
 267 # define STDOUT_FILENO  1
 268 # define STDERR_FILENO  2
 269 # ifndef __APPLE__
 270 extern char *getenv __P((char *));
 271 # else
 272 extern char *getenv __P((const char *));
 273 # endif
 274 extern int errno;
 275
 276 # if !defined(DMALLOC) && !defined(__APPLE__)
 277 extern char *malloc(), *realloc(), *calloc();
 278 #  if defined(sun)
 279 extern int free();
 280 #  else
 281 extern void free();
 282 #  endif
 283 # endif
 284
 285 extern int getdtablesize __P((void));
 286 # ifdef SHORT_FNAMES
 287 extern long pathconf __P((const char *path, int name));
 288 # endif
 289
 290 #endif /*USE_POSIX*/
 291
 292 #ifndef UINT_MAX
 293 # ifdef __STDC__
 294 #  define UINT_MAX      4294967295u             /* max value of an "u_int" */
 295 # else
 296 #  define UINT_MAX      ((unsigned)4294967295)  /* max value of an "u_int" */
 297 # endif
 298 #  define ULONG_MAX     UINT_MAX        /* max decimal value of a "u_long" */
 299 #endif
 300
 301 #ifndef INT_MAX
 302 # define INT_MAX        2147483647      /* max decimal value of an "int" */
 303 #endif
 304
 305 #ifndef RAND_MAX
 306 # define RAND_MAX       0x7fffffff
 307 #endif
 308
 309 #ifndef IN_LOOPBACKNET
 310 # define IN_LOOPBACKNET 127
 311 #endif
 312
 313 #ifndef INADDR_NONE
 314 # define INADDR_NONE    0xffffffff
 315 #endif
 316
 317 #if defined(apollo)
 318                 /* Defined in /usr/include/netinet/in.h but doesn't work */
 319 #undef IP_OPTIONS
 320 #endif
 321
 322 #if !defined(__STDC__) && !defined(const)
 323 # define const /*constant*/
 324 #endif
 325
 326 #if !defined(__convex__) && (!defined(BSD) || (BSD < 199103))
 327 int      strcasecmp __P((const char *, const char *));
 328 #endif
 329
 330 /* is USE_POSIX the right thing to use here? */
 331 #if (!defined(BSD) || (BSD <= 43)) && \
 332         !defined(NeXT) && \
 333         !defined(__convex__) && \
 334         !defined(USE_POSIX)
 335 # if !defined(NCR)
 336 extern void     syslog();
 337 # endif
 338 extern char     *ctime __P((const time_t *clock));
 339 extern int      close(), setitimer(), recv(), sendto(), sigsetmask(),
 340                 atoi(), getpid(), fork(), read(), ioctl(),
 341                 setsockopt(), socket(), bind();
 342 #endif
 343
 344 #if !defined(bcopy)     /* some machines have their own macros for this */
 345 # if defined(USE_POSIX) || \
 346          (defined(__STDC__) && !defined(sun) && !defined(sequent))
 347 /* use ANSI C3.159-1989 (``ANSI C'') functions if possible;
 348  * ideally we would change the code to use them and then
 349  * define them in terms of bcopy et al if !defined(__STDC__)
 350  * but that's more work.
 351  */
 352 #if defined(USE_MEMCPY)
 353 #  define bcopy(a,b,c) memcpy(b,a,c)
 354 #else
 355 #  define bcopy(a,b,c) memmove(b,a,c)
 356 #endif
 357 #  define bzero(a,b) memset(a,0,b)
 358 #  define bcmp(a,b,c) memcmp(a,b,c)
 359 # else
 360 extern void bcopy();
 361 extern void bzero();
 362 extern int bcmp();
 363 # endif /* BSD */
 364 #endif /* bcopy */
 365
 366 #if (!defined(BSD) || (BSD < 43) || defined(RISCOS_BSD)) \
 367         && !defined(USE_POSIX) && !defined(apollo) && !defined(sequent) \
 368         && !defined(M_UNIX)
 369 # define NEED_STRERROR
 370 #if !defined(ultrix) && !defined(NCR)
 371 # define NEED_PUTENV
 372 #endif
 373 #endif
 374
 375 #if defined(SUNOS4)
 376 # define NEED_STRERROR
 377 # if defined(sun386)
 378 #  define pid_t int
 379 #  define NEED_STRCASECMP
 380 # endif
 381 #endif
 382
 383 #if (!defined(BSD) || (BSD < 43))
 384 # define NEED_MKSTEMP
 385 # if !defined(__ultrix) && !defined(apollo)
 386 #  define NEED_STRCASECMP
 387 #  define NEED_MKTEMP
 388 #  if !defined(SVR4)
 389 #   define NEED_STRPBRK
 390 #  endif
 391 # endif
 392 #endif
 393
 394 #if defined(USE_POSIX)
 395 # define POSIX_SIGNALS
 396 #endif
 397
 398 /*
 399  * Attempt to configure for type of function returned by signal-catching
 400  * functions (which signal and sigvec.sv_handler take a pointer to).
 401  * This can guess for BSD; otherwise, define SIG_FN externally.
 402  */
 403 #ifndef SIG_FN
 404 # ifdef BSD
 405 #  if (BSD >= 199006) || defined(__APPLE__) || defined(__osf__) || defined(sun) \
 406         || defined(__ultrix) || defined(apollo) || defined(POSIX_SIGNALS)
 407 #   define SIG_FN void          /* signal-catching functions return void */
 408 #  else
 409 #   define SIG_FN int           /* signal-catching functions return int */
 410 #  endif
 411 # else /*BSD*/
 412 #  define SIG_FN void           /* signal-catching functions return void */
 413 # endif /*BSD*/
 414 #endif
 415
 416 #if !defined(ntohl) && !defined(htonl) && defined(BSD) && (BSD <= 43)
 417 /* if these aren't null macros in netinet/in.h, extern them here. */
 418 extern u_short htons(), ntohs();
 419 extern u_long htonl(), ntohl();
 420 #endif
 421
 422 #if defined(USE_POSIX) && !defined(sun) && !defined(__sgi) \
 423         && !defined(__convex__) && !defined(__ultrix) && !defined(_AUX_SOURCE)
 424 # define PORT_NONBLOCK  O_NONBLOCK
 425 # define PORT_WOULDBLK  EAGAIN
 426 #else
 427 # define PORT_NONBLOCK  O_NDELAY
 428 # define PORT_WOULDBLK  EWOULDBLOCK
 429 #endif
 430
 431 #if defined(USE_POSIX)
 432 # define USE_SETSID
 433 #endif
 434
 435 #if defined(USE_POSIX) || !defined(SYSV)
 436 #define USE_WAITPID
 437 #endif
 438
 439 #if !defined(USE_POSIX)
 440 #define waitpid(x,y,z) (wait3(y,z,(struct rusage *)NULL))
 441 #endif
 442
 443 #if defined(__APPLE__) || defined(_AIX) || defined(sun386)
 444 # undef WIFEXITED
 445 # undef WEXITSTATUS
 446 # undef WIFSIGNALED
 447 # undef WTERMSIG
 448 #endif /* NeXT */
 449
 450 #if defined(sequent)
 451 #define WEXITSTATUS(x)  ((x).w_retcode)
 452 #define WTERMSIG(x)     ((x).w_termsig)
 453 #endif /* sequent */
 454
 455 #if !defined(WIFEXITED)
 456 # define WIFEXITED(x) (!(x & 0177))
 457 #endif
 458 #if !defined(WEXITSTATUS)
 459 # define WEXITSTATUS(x) (x >> 8)
 460 #endif
 461 #if !defined(WIFSIGNALED)
 462 # define WIFSIGNALED(x) ((x & 0177) && ((x & 0377) != 0177))
 463 #endif
 464 #if !defined(WTERMSIG)
 465 # define WTERMSIG(x) (x & 0177)
 466 #endif
 467
 468 #ifndef S_ISDIR
 469 # ifndef S_IFMT
 470 #  define S_IFMT 0170000
 471 # endif
 472 # ifndef S_IFDIR
 473 #  define S_IFDIR 0040000
 474 # endif
 475 # define S_ISDIR(m)     ((m & S_IFMT) == S_IFDIR)
 476 #endif
 477
 478 #ifndef S_ISREG
 479 # ifndef S_IFMT
 480 #  define S_IFMT 0170000
 481 # endif
 482 # ifndef S_IFREG
 483 #  define S_IFREG 0100000
 484 # endif
 485 # define S_ISREG(m)     ((m & S_IFMT) == S_IFREG)
 486 #endif
 487
 488 #ifndef S_ISFIFO
 489 # ifndef S_IFMT
 490 #  define S_IFMT 0170000
 491 # endif
 492 # ifndef S_IFIFO
 493 #  define S_IFIFO 0010000
 494 # endif
 495 # define S_ISFIFO(m)    ((m & S_IFMT) == S_IFIFO)
 496 #endif
 497
 498 #if defined(NEED_STRTOUL) && \
 499         (defined(__ultrix) || defined(__osf__) || defined(NeXT))
 500 # undef NEED_STRTOUL
 501 #endif
 502
 503 #if defined(__ultrix) || defined(__osf__)
 504 # define MAYBE_HESIOD
 505 #endif
 506
 507 #ifndef FD_SET
 508 #define NFDBITS         32
 509 #define FD_SETSIZE      32
 510 #define FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
 511 #define FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
 512 #define FD_ISSET(n, p)  ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
 513 #define FD_ZERO(p)      bzero((char *)(p), sizeof(*(p)))
 514 #endif
 515
 516 #ifndef MIN
 517 # define MIN(x, y)      ((x > y) ?y :x)
 518 #endif
 519 #ifndef MAX
 520 # define MAX(x, y)      ((x > y) ?x :y)
 521 #endif
 522
 523 #if !defined(PATH_MAX)
 524 # if defined(_POSIX_PATH_MAX)
 525 #  define PATH_MAX _POSIX_PATH_MAX
 526 # else
 527 #  if defined(MAXPATHLEN)
 528 #   define PATH_MAX MAXPATHLEN
 529 #  endif
 530 # endif
 531 #endif
 532
 533 #if defined(BSD) || defined(__osf__) || defined(__convex__)
 534 # define HAVE_GETRUSAGE
 535 #endif
 536
 537 /* May be set in the Makefile. */
 538 #if defined(HAVE_GETRUSAGE)
 539 # include <sys/resource.h>
 540 #endif
 541
 542 /*
 543  *  Because Convex has true library function feof() which is
 544  *  patently wrong (it test bit _IOREAD) we need feof() as
 545  *  a macro.
 546  */
 547 #if defined(__convex__) && !defined(feof)
 548 #  define   feof(p)     ((p)->_flag&_IOEOF)
 549 #endif
 550
 551 #if defined(M_UNIX) || defined(linux)
 552 # define SPURIOUS_ECONNREFUSED
 553 #endif
 554
 555 /*
 556  * Assume that a system has fchmod() unless something above says otherwise.
 557  */
 558 #if !defined(HAVE_FCHMOD)
 559 # define HAVE_FCHMOD 1
 560 #endif
 561
 562 /*
 563  * Prototype the functions we'll be supplying.
 564  */
 565 #ifdef NEED_PUTENV
 566 extern int putenv __P((char *));
 567 #endif
 568
 569 #ifdef NEED_GETTIMEOFDAY
 570 extern int gettimeofday __P((struct timeval *, struct _TIMEZONE *));
 571 #endif