source/lib/replace/replace.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    macros to go along with the lib/replace/ portability layer code
   5
   6    Copyright (C) Andrew Tridgell 2005
   7    Copyright (C) Jelmer Vernooij 2006
   8    Copyright (C) Jeremy Allison 2007.
   9
  10      ** NOTE! The following LGPL license applies to the replace
  11      ** library. This does NOT imply that all of Samba is released
  12      ** under the LGPL
  13
  14    This library is free software; you can redistribute it and/or
  15    modify it under the terms of the GNU Lesser General Public
  16    License as published by the Free Software Foundation; either
  17    version 3 of the License, or (at your option) any later version.
  18
  19    This library is distributed in the hope that it will be useful,
  20    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22    Lesser General Public License for more details.
  23
  24    You should have received a copy of the GNU Lesser General Public
  25    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  26 */
  27
  28 #ifndef _LIBREPLACE_REPLACE_H
  29 #define _LIBREPLACE_REPLACE_H
  30
  31 #ifndef NO_CONFIG_H
  32 #include "config.h"
  33 #endif
  34
  35 #ifdef HAVE_STANDARDS_H
  36 #include <standards.h>
  37 #endif
  38
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <stdarg.h>
  42 #include <errno.h>
  43
  44 #if defined(_MSC_VER) || defined(__MINGW32__)
  45 #include "win32_replace.h"
  46 #endif
  47
  48
  49 #ifdef HAVE_STDINT_H
  50 #include <stdint.h>
  51 /* force off HAVE_INTTYPES_H so that roken doesn't try to include both,
  52    which causes a warning storm on irix */
  53 #undef HAVE_INTTYPES_H
  54 #elif HAVE_INTTYPES_H
  55 #include <inttypes.h>
  56 #endif
  57
  58 #ifdef HAVE_STRING_H
  59 #include <string.h>
  60 #endif
  61
  62 #ifdef HAVE_STRINGS_H
  63 #include <strings.h>
  64 #endif
  65
  66 #ifdef HAVE_SYS_TYPES_H
  67 #include <sys/types.h>
  68 #endif
  69
  70 #if STDC_HEADERS
  71 #include <stdlib.h>
  72 #include <stddef.h>
  73 #endif
  74
  75 #ifndef HAVE_STRERROR
  76 extern char *sys_errlist[];
  77 #define strerror(i) sys_errlist[i]
  78 #endif
  79
  80 #ifndef HAVE_ERRNO_DECL
  81 extern int errno;
  82 #endif
  83
  84 #ifndef HAVE_STRDUP
  85 #define strdup rep_strdup
  86 char *rep_strdup(const char *s);
  87 #endif
  88
  89 #ifndef HAVE_MEMMOVE
  90 #define memmove rep_memmove
  91 void *rep_memmove(void *dest,const void *src,int size);
  92 #endif
  93
  94 #ifndef HAVE_MKTIME
  95 #define mktime rep_mktime
  96 /* prototype is in "system/time.h" */
  97 #endif
  98
  99 #ifndef HAVE_TIMEGM
 100 #define timegm rep_timegm
 101 /* prototype is in "system/time.h" */
 102 #endif
 103
 104 #ifndef HAVE_STRLCPY
 105 #define strlcpy rep_strlcpy
 106 size_t rep_strlcpy(char *d, const char *s, size_t bufsize);
 107 #endif
 108
 109 #ifndef HAVE_STRLCAT
 110 #define strlcat rep_strlcat
 111 size_t rep_strlcat(char *d, const char *s, size_t bufsize);
 112 #endif
 113
 114 #if (defined(BROKEN_STRNDUP) || !defined(HAVE_STRNDUP))
 115 #undef HAVE_STRNDUP
 116 #define strndup rep_strndup
 117 char *rep_strndup(const char *s, size_t n);
 118 #endif
 119
 120 #if (defined(BROKEN_STRNLEN) || !defined(HAVE_STRNLEN))
 121 #undef HAVE_STRNLEN
 122 #define strnlen rep_strnlen
 123 size_t rep_strnlen(const char *s, size_t n);
 124 #endif
 125
 126 #ifndef HAVE_SETENV
 127 #define setenv rep_setenv
 128 int rep_setenv(const char *name, const char *value, int overwrite);
 129 #else
 130 #ifndef HAVE_SETENV_DECL
 131 int setenv(const char *name, const char *value, int overwrite);
 132 #endif
 133 #endif
 134
 135 #ifndef HAVE_UNSETENV
 136 #define unsetenv rep_unsetenv
 137 int rep_unsetenv(const char *name);
 138 #endif
 139
 140 #ifndef HAVE_SETEUID
 141 #define seteuid rep_seteuid
 142 int rep_seteuid(uid_t);
 143 #endif
 144
 145 #ifndef HAVE_SETEGID
 146 #define setegid rep_setegid
 147 int rep_setegid(gid_t);
 148 #endif
 149
 150 #ifndef HAVE_SETLINEBUF
 151 #define setlinebuf rep_setlinebuf
 152 void rep_setlinebuf(FILE *);
 153 #endif
 154
 155 #ifndef HAVE_STRCASESTR
 156 #define strcasestr rep_strcasestr
 157 char *rep_strcasestr(const char *haystack, const char *needle);
 158 #endif
 159
 160 #ifndef HAVE_STRTOK_R
 161 #define strtok_r rep_strtok_r
 162 char *rep_strtok_r(char *s, const char *delim, char **save_ptr);
 163 #endif
 164
 165 #ifndef HAVE_STRTOLL
 166 #define strtoll rep_strtoll
 167 long long int rep_strtoll(const char *str, char **endptr, int base);
 168 #endif
 169
 170 #ifndef HAVE_STRTOULL
 171 #define strtoull rep_strtoull
 172 unsigned long long int rep_strtoull(const char *str, char **endptr, int base);
 173 #endif
 174
 175 #ifndef HAVE_FTRUNCATE
 176 #define ftruncate rep_ftruncate
 177 int rep_ftruncate(int,off_t);
 178 #endif
 179
 180 #ifndef HAVE_INITGROUPS
 181 #define initgroups rep_initgroups
 182 int rep_initgroups(char *name, gid_t id);
 183 #endif
 184
 185 #if !defined(HAVE_BZERO) && defined(HAVE_MEMSET)
 186 #define bzero(a,b) memset((a),'\0',(b))
 187 #endif
 188
 189 #ifndef HAVE_DLERROR
 190 #define dlerror rep_dlerror
 191 char *rep_dlerror(void);
 192 #endif
 193
 194 #ifndef HAVE_DLOPEN
 195 #define dlopen rep_dlopen
 196 #ifdef DLOPEN_TAKES_UNSIGNED_FLAGS
 197 void *rep_dlopen(const char *name, unsigned int flags);
 198 #else
 199 void *rep_dlopen(const char *name, int flags);
 200 #endif
 201 #endif
 202
 203 #ifndef HAVE_DLSYM
 204 #define dlsym rep_dlsym
 205 void *rep_dlsym(void *handle, const char *symbol);
 206 #endif
 207
 208 #ifndef HAVE_DLCLOSE
 209 #define dlclose rep_dlclose
 210 int rep_dlclose(void *handle);
 211 #endif
 212
 213 #ifndef HAVE_SOCKETPAIR
 214 #define socketpair rep_socketpair
 215 int rep_socketpair(int d, int type, int protocol, int sv[2]);
 216 #endif
 217
 218 #ifndef PRINTF_ATTRIBUTE
 219 #if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
 220 /** Use gcc attribute to check printf fns.  a1 is the 1-based index of
 221  * the parameter containing the format, and a2 the index of the first
 222  * argument. Note that some gcc 2.x versions don't handle this
 223  * properly **/
 224 #define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (__printf__, a1, a2)))
 225 #else
 226 #define PRINTF_ATTRIBUTE(a1, a2)
 227 #endif
 228 #endif
 229
 230 #ifndef _DEPRECATED_
 231 #if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
 232 #define _DEPRECATED_ __attribute__ ((deprecated))
 233 #else
 234 #define _DEPRECATED_
 235 #endif
 236 #endif
 237
 238 #ifndef HAVE_VASPRINTF
 239 #define vasprintf rep_vasprintf
 240 int rep_vasprintf(char **ptr, const char *format, va_list ap) PRINTF_ATTRIBUTE(2,0);
 241 #endif
 242
 243 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
 244 #define snprintf rep_snprintf
 245 int rep_snprintf(char *,size_t ,const char *, ...) PRINTF_ATTRIBUTE(3,4);
 246 #endif
 247
 248 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
 249 #define vsnprintf rep_vsnprintf
 250 int rep_vsnprintf(char *,size_t ,const char *, va_list ap) PRINTF_ATTRIBUTE(3,0);
 251 #endif
 252
 253 #ifndef HAVE_ASPRINTF
 254 #define asprintf rep_asprintf
 255 int rep_asprintf(char **,const char *, ...) PRINTF_ATTRIBUTE(2,3);
 256 #endif
 257
 258 #ifndef HAVE_VSYSLOG
 259 #ifdef HAVE_SYSLOG
 260 #define vsyslog rep_vsyslog
 261 void rep_vsyslog (int facility_priority, const char *format, va_list arglist) PRINTF_ATTRIBUTE(2,0);
 262 #endif
 263 #endif
 264
 265 /* we used to use these fns, but now we have good replacements
 266    for snprintf and vsnprintf */
 267 #define slprintf snprintf
 268
 269
 270 #ifndef HAVE_VA_COPY
 271 #undef va_copy
 272 #ifdef HAVE___VA_COPY
 273 #define va_copy(dest, src) __va_copy(dest, src)
 274 #else
 275 #define va_copy(dest, src) (dest) = (src)
 276 #endif
 277 #endif
 278
 279 #ifndef HAVE_VOLATILE
 280 #define volatile
 281 #endif
 282
 283 #ifndef HAVE_COMPARISON_FN_T
 284 typedef int (*comparison_fn_t)(const void *, const void *);
 285 #endif
 286
 287 #ifdef REPLACE_STRPTIME
 288 #define strptime rep_strptime
 289 struct tm;
 290 char *rep_strptime(const char *buf, const char *format, struct tm *tm);
 291 #endif
 292
 293 /* Load header file for dynamic linking stuff */
 294 #ifdef HAVE_DLFCN_H
 295 #include <dlfcn.h>
 296 #endif
 297
 298 #ifndef RTLD_LAZY
 299 #define RTLD_LAZY 0
 300 #endif
 301 #ifndef RTLD_NOW
 302 #define RTLD_NOW 0
 303 #endif
 304 #ifndef RTLD_GLOBAL
 305 #define RTLD_GLOBAL 0
 306 #endif
 307
 308 #ifndef HAVE_SECURE_MKSTEMP
 309 #define mkstemp(path) rep_mkstemp(path)
 310 int rep_mkstemp(char *temp);
 311 #endif
 312
 313 #ifndef HAVE_MKDTEMP
 314 #define mkdtemp rep_mkdtemp
 315 char *rep_mkdtemp(char *template);
 316 #endif
 317
 318 #ifndef HAVE_PREAD
 319 #define pread rep_pread
 320 ssize_t rep_pread(int __fd, void *__buf, size_t __nbytes, off_t __offset);
 321 #endif
 322
 323 #ifndef HAVE_PWRITE
 324 #define pwrite rep_pwrite
 325 ssize_t rep_pwrite(int __fd, const void *__buf, size_t __nbytes, off_t __offset);
 326 #endif
 327
 328 #ifdef REPLACE_INET_NTOA
 329 #define inet_ntoa rep_inet_ntoa
 330 /* prototype is in "system/network.h" */
 331 #endif
 332
 333 #ifndef HAVE_INET_PTON
 334 #define inet_pton rep_inet_pton
 335 /* prototype is in "system/network.h" */
 336 #endif
 337
 338 #ifndef HAVE_INET_NTOP
 339 #define inet_ntop rep_inet_ntop
 340 /* prototype is in "system/network.h" */
 341 #endif
 342
 343 #ifdef HAVE_LIMITS_H
 344 #include <limits.h>
 345 #endif
 346
 347 #ifdef HAVE_SYS_PARAM_H
 348 #include <sys/param.h>
 349 #endif
 350
 351 /* The extra casts work around common compiler bugs.  */
 352 #define _TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 353 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 354    It is necessary at least when t == time_t.  */
 355 #define _TYPE_MINIMUM(t) ((t) (_TYPE_SIGNED (t) \
 356                               ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
 357 #define _TYPE_MAXIMUM(t) ((t) (~ (t) 0 - _TYPE_MINIMUM (t)))
 358
 359 #ifndef HOST_NAME_MAX
 360 #define HOST_NAME_MAX 255
 361 #endif
 362
 363 /*
 364  * Some older systems seem not to have MAXHOSTNAMELEN
 365  * defined.
 366  */
 367 #ifndef MAXHOSTNAMELEN
 368 #define MAXHOSTNAMELEN HOST_NAME_MAX
 369 #endif
 370
 371 #ifndef UINT16_MAX
 372 #define UINT16_MAX 65535
 373 #endif
 374
 375 #ifndef UINT32_MAX
 376 #define UINT32_MAX (4294967295U)
 377 #endif
 378
 379 #ifndef UINT64_MAX
 380 #define UINT64_MAX ((uint64_t)-1)
 381 #endif
 382
 383 #ifndef CHAR_BIT
 384 #define CHAR_BIT 8
 385 #endif
 386
 387 #ifndef INT32_MAX
 388 #define INT32_MAX _TYPE_MAXIMUM(int32_t)
 389 #endif
 390
 391 #ifdef HAVE_STDBOOL_H
 392 #include <stdbool.h>
 393 #endif
 394
 395 #if !defined(HAVE_BOOL)
 396 #ifdef HAVE__Bool
 397 #define bool _Bool
 398 #else
 399 typedef int bool;
 400 #endif
 401 #endif
 402
 403 /*
 404  * to prevent <rpcsvc/yp_prot.h> from doing a redefine of 'bool'
 405  *
 406  * IRIX, HPUX, MacOS 10 and Solaris need BOOL_DEFINED
 407  * Tru64 needs _BOOL_EXISTS
 408  * AIX needs _BOOL,_TRUE,_FALSE
 409  */
 410 #ifndef BOOL_DEFINED
 411 #define BOOL_DEFINED
 412 #endif
 413 #ifndef _BOOL_EXISTS
 414 #define _BOOL_EXISTS
 415 #endif
 416 #ifndef _BOOL
 417 #define _BOOL
 418 #endif
 419
 420 #ifndef __bool_true_false_are_defined
 421 #define __bool_true_false_are_defined
 422 #endif
 423
 424 #ifndef true
 425 #define true (1)
 426 #endif
 427 #ifndef false
 428 #define false (0)
 429 #endif
 430
 431 #ifndef _TRUE
 432 #define _TRUE true
 433 #endif
 434 #ifndef _FALSE
 435 #define _FALSE false
 436 #endif
 437
 438 #ifndef HAVE_FUNCTION_MACRO
 439 #ifdef HAVE_func_MACRO
 440 #define __FUNCTION__ __func__
 441 #else
 442 #define __FUNCTION__ ("")
 443 #endif
 444 #endif
 445
 446
 447 #ifndef MIN
 448 #define MIN(a,b) ((a)<(b)?(a):(b))
 449 #endif
 450
 451 #ifndef MAX
 452 #define MAX(a,b) ((a)>(b)?(a):(b))
 453 #endif
 454
 455 #if !defined(HAVE_VOLATILE)
 456 #define volatile
 457 #endif
 458
 459 /**
 460   this is a warning hack. The idea is to use this everywhere that we
 461   get the "discarding const" warning from gcc. That doesn't actually
 462   fix the problem of course, but it means that when we do get to
 463   cleaning them up we can do it by searching the code for
 464   discard_const.
 465
 466   It also means that other error types aren't as swamped by the noise
 467   of hundreds of const warnings, so we are more likely to notice when
 468   we get new errors.
 469
 470   Please only add more uses of this macro when you find it
 471   _really_ hard to fix const warnings. Our aim is to eventually use
 472   this function in only a very few places.
 473
 474   Also, please call this via the discard_const_p() macro interface, as that
 475   makes the return type safe.
 476 */
 477 #define discard_const(ptr) ((void *)((intptr_t)(ptr)))
 478
 479 /** Type-safe version of discard_const */
 480 #define discard_const_p(type, ptr) ((type *)discard_const(ptr))
 481
 482 #ifndef __STRING
 483 #define __STRING(x)    #x
 484 #endif
 485
 486 #ifndef __STRINGSTRING
 487 #define __STRINGSTRING(x) __STRING(x)
 488 #endif
 489
 490 #ifndef __LINESTR__
 491 #define __LINESTR__ __STRINGSTRING(__LINE__)
 492 #endif
 493
 494 #ifndef __location__
 495 #define __location__ __FILE__ ":" __LINESTR__
 496 #endif
 497
 498 /**
 499  * zero a structure
 500  */
 501 #define ZERO_STRUCT(x) memset((char *)&(x), 0, sizeof(x))
 502
 503 /**
 504  * zero a structure given a pointer to the structure
 505  */
 506 #define ZERO_STRUCTP(x) do { if ((x) != NULL) memset((char *)(x), 0, sizeof(*(x))); } while(0)
 507
 508 /**
 509  * zero a structure given a pointer to the structure - no zero check
 510  */
 511 #define ZERO_STRUCTPN(x) memset((char *)(x), 0, sizeof(*(x)))
 512
 513 /* zero an array - note that sizeof(array) must work - ie. it must not be a
 514    pointer */
 515 #define ZERO_ARRAY(x) memset((char *)(x), 0, sizeof(x))
 516
 517 /**
 518  * work out how many elements there are in a static array
 519  */
 520 #define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
 521
 522 /**
 523  * pointer difference macro
 524  */
 525 #define PTR_DIFF(p1,p2) ((ptrdiff_t)(((const char *)(p1)) - (const char *)(p2)))
 526
 527 #if MMAP_BLACKLIST
 528 #undef HAVE_MMAP
 529 #endif
 530
 531 #ifdef __COMPAR_FN_T
 532 #define QSORT_CAST (__compar_fn_t)
 533 #endif
 534
 535 #ifndef QSORT_CAST
 536 #define QSORT_CAST (int (*)(const void *, const void *))
 537 #endif
 538
 539 #ifndef PATH_MAX
 540 #define PATH_MAX 1024
 541 #endif
 542
 543 #endif /* _LIBREPLACE_REPLACE_H */