include/got_compat2.h

   1 /*
   2  * Copyright (c) 2023 Thomas Adam <thomas@xteddy.org>
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #ifndef _GOT_COMPAT_H_2
  18 #define _GOT_COMPAT_H_2
  19
  20 #include <limits.h>
  21 #include <sys/uio.h>
  22
  23 #if defined(__FreeBSD__)
  24 #include <sys/endian.h>
  25 #include <sys/capsicum.h>
  26 #elif defined(__APPLE__)
  27 #include <machine/endian.h>
  28 #include <libkern/OSByteOrder.h>
  29 #include "compat/bsd-poll.h"
  30
  31 #define FMT_SCALED_STRSIZE      7  /* minus sign, 4 digits, suffix, null byte */
  32
  33 #define htobe16(x) OSSwapHostToBigInt16(x)
  34 #define htole16(x) OSSwapHostToLittleInt16(x)
  35 #define be16toh(x) OSSwapBigToHostInt16(x)
  36 #define le16toh(x) OSSwapLittleToHostInt16(x)
  37
  38 #define htobe32(x) OSSwapHostToBigInt32(x)
  39 #define htole32(x) OSSwapHostToLittleInt32(x)
  40 #define be32toh(x) OSSwapBigToHostInt32(x)
  41 #define le32toh(x) OSSwapLittleToHostInt32(x)
  42
  43 #define htobe64(x) OSSwapHostToBigInt64(x)
  44 #define htole64(x) OSSwapHostToLittleInt64(x)
  45 #define be64toh(x) OSSwapBigToHostInt64(x)
  46 #define le64toh(x) OSSwapLittleToHostInt64(x)
  47
  48 #define st_atim st_atimespec
  49 #define st_ctim st_ctimespec
  50 #define st_mtim st_mtimespec
  51
  52 #else /* Linux, etc... */
  53 #include <endian.h>
  54 #include <grp.h>
  55 #include <stdlib.h>
  56 #endif
  57
  58 #ifndef __GNUC__
  59 #define __attribute__(a)
  60 #ifndef __bounded__
  61 #define __bounded__(a, b, c)
  62 #endif
  63 #endif
  64
  65
  66 /* For flock. */
  67 #ifndef O_EXLOCK
  68 #define O_EXLOCK 0
  69 #endif
  70
  71 #ifndef HAVE_FLOCK
  72 #define LOCK_SH 0
  73 #define LOCK_EX 0
  74 #define LOCK_NB 0
  75 #define flock(fd, op) (0)
  76 #else
  77 #include <sys/file.h>
  78 #endif
  79
  80 /* POSIX doesn't define WAIT_ANY, so provide it if it's not found. */
  81 #ifndef WAIT_ANY
  82 #define WAIT_ANY (-1)
  83 #endif
  84
  85 /* On FreeBSD (and possibly others), EAI_NODATA was removed, in favour of
  86  * using EAI_NONAME.
  87  */
  88 #ifndef EAI_NODATA
  89 #define EAI_NODATA EAI_NONAME
  90 #endif
  91
  92 #ifndef __dead
  93 #define __dead __attribute__ ((__noreturn__))
  94 #endif
  95
  96 #ifndef __unused
  97 #define __unused __attribute__ ((__unused__))
  98 #endif
  99
 100 #ifndef __OpenBSD__
 101 #define pledge(s, p) (0)
 102 #define unveil(s, p) (0)
 103 #endif
 104
 105 #ifndef __FreeBSD__
 106 #define cap_enter() (0)
 107 #endif
 108
 109 #ifndef HAVE_B64_NTOP
 110 #undef b64_ntop
 111 #undef b64_pton
 112 int              b64_ntop(u_char const *, size_t, char *, size_t);
 113 int              b64_pton(char const *, u_char *, size_t);
 114 #endif
 115
 116 #ifndef HAVE_SETRESGID
 117 #define setresgid(a, b, c) (0)
 118 #endif
 119
 120 #ifndef HAVE_SETRESUID
 121 #define setresuid(a, b, c) (0)
 122 #endif
 123
 124 #ifndef HAVE_LINUX_LANDLOCK_H
 125 #define landlock_no_fs() (0)
 126 #else
 127 int     landlock_no_fs(void);
 128 #endif
 129
 130 #ifndef INFTIM
 131 #define INFTIM -1
 132 #endif
 133
 134 #ifndef HAVE_BSD_UUID
 135 #include <uuid/uuid.h>
 136 #define uuid_s_ok 0
 137 #define uuid_s_bad_version  1
 138 #define uuid_s_invalid_string_uuid 2
 139 #define uuid_s_no_memory  3
 140
 141 /* Length of a node address (an IEEE 802 address). */
 142 #define _UUID_NODE_LEN  6
 143
 144 struct uuid {
 145         uint32_t time_low;
 146         uint16_t time_mid;
 147         uint16_t time_hi_and_version;
 148         uint8_t  clock_seq_hi_and_reserved;
 149         uint8_t  clock_seq_low;
 150         uint8_t  node[_UUID_NODE_LEN];
 151 };
 152
 153 int32_t uuid_equal(struct uuid *, struct uuid *, uint32_t *);
 154 int32_t uuid_is_nil(struct uuid *, uint32_t *);
 155 void uuid_create(uuid_t *, uint32_t *);
 156 void uuid_create_nil(struct uuid *, uint32_t *);
 157 void uuid_from_string(const char *, uuid_t *, uint32_t *);
 158 void uuid_to_string(uuid_t *, char **, uint32_t *);
 159 #else
 160 #include <uuid.h>
 161 #endif
 162
 163 #ifdef HAVE_STDINT_H
 164 #include <stdint.h>
 165 #else
 166 #include <inttypes.h>
 167 #endif
 168
 169 #ifdef HAVE_QUEUE_H
 170 #include <sys/queue.h>
 171 #endif
 172
 173 #ifndef HAVE_TREE_H
 174 #include "compat/tree.h"
 175 #else
 176 #include <sys/tree.h>
 177 #endif
 178
 179 #ifdef HAVE_UTIL_H
 180 #include <util.h>
 181 #endif
 182
 183 #ifdef HAVE_LIBUTIL_H
 184 #include <libutil.h>
 185 #endif
 186
 187 #ifndef IOV_MAX
 188 # define IOV_MAX 1024
 189 #endif
 190
 191 #ifndef HAVE_IMSG
 192 #include "compat/imsg.h"
 193 #else
 194 #include <imsg.h>
 195 #endif
 196
 197 #ifndef HAVE_SIPHASH
 198 #include "compat/siphash.h"
 199 #else
 200 #include <siphash.h>
 201 #endif
 202
 203 /* Include Apple-specific headers.  Mostly for crypto.*/
 204 #if defined(__APPLE__)
 205 #define COMMON_DIGEST_FOR_OPENSSL
 206 #include <CommonCrypto/CommonDigest.h>
 207
 208 #define SHA512_BLOCK_LENGTH             128
 209 typedef struct _SHA2_CTX {
 210         union {
 211                 u_int32_t       st32[8];
 212                 u_int64_t       st64[8];
 213         } state;
 214         u_int64_t       bitcount[2];
 215         u_int8_t        buffer[SHA512_BLOCK_LENGTH];
 216 } SHA2_CTX;
 217 #endif
 218
 219 #if defined(__APPLE__) || defined(__NetBSD__)
 220 #define SHA256Init SHA256_Init
 221 #define SHA256Update SHA256_Update
 222 #define SHA256Final SHA256_Final
 223 #endif
 224
 225 #ifndef __APPLE__
 226 #ifdef HAVE_SHA_H
 227 #  include <sha.h>
 228 #endif
 229 #ifdef HAVE_SHA1_H
 230 #      include <sha1.h>
 231 #endif
 232 #ifdef HAVE_SHA2_H
 233 #    include <sha2.h>
 234 #else
 235 #    include "sha2.h"
 236 #endif
 237 #ifdef HAVE_SHA256_H
 238 #    include <sha256.h>
 239 #endif
 240 #endif
 241
 242 /* Catch-all for systems where the header files don't exist and/or the below
 243  * still are not defined.
 244  */
 245 #ifndef SHA256_DIGEST_LENGTH
 246 #define SHA256_DIGEST_LENGTH 32
 247 #endif
 248
 249 #ifndef SHA256_DIGEST_STRING_LENGTH
 250 #define SHA256_DIGEST_STRING_LENGTH (SHA256_DIGEST_LENGTH * 2 + 1)
 251 #endif
 252
 253 #if defined(__DragonFly__)
 254 #include <openssl/sha.h>
 255 #endif
 256
 257 #ifndef SHA1_DIGEST_LENGTH
 258 #define SHA1_DIGEST_LENGTH              SHA_DIGEST_LENGTH
 259 #define SHA1_DIGEST_STRING_LENGTH       (SHA1_DIGEST_LENGTH * 2 + 1)
 260
 261 #define SHA1_CTX        SHA_CTX
 262 #define SHA1Init        SHA1_Init
 263 #define SHA1Update      SHA1_Update
 264 #define SHA1Final       SHA1_Final
 265 #endif
 266
 267 /*
 268  * The following SA_LEN/SS_LEN dance comes from various source, notably
 269  * OpenSMTP by way of OpenNTPD and OpenBGPD (thanks everyone!).  got-portable
 270  * has tweaked a lot of the following macros to suit the needs of
 271  * got-portable.
 272  */
 273
 274 /* From OpenNTPD portable */
 275 #if !defined(SA_LEN)
 276 # if defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
 277 #  define SA_LEN(x)     ((x)->sa_len)
 278 # else
 279 #  define SA_LEN(x)     ((x)->sa_family == AF_INET6 ? \
 280                         sizeof(struct sockaddr_in6) : \
 281                         sizeof(struct sockaddr_in))
 282 # endif
 283
 284 #endif
 285
 286 /* From OpenBGPD portable */
 287 #if !defined(SS_LEN)
 288 # if defined(HAVE_STRUCT_SOCKADDR_STORAGE_SS_LEN)
 289 #  define SS_LEN(x)  ((x)->ss_len)
 290 # else
 291 #  define SS_LEN(x)  SA_LEN((struct sockaddr *)(x))
 292 # endif
 293 #endif
 294
 295 /* SOCK_NONBLOCK isn't available across BSDs... */
 296 #if !defined(SOCK_NONBLOCK) && !defined(__linux__)
 297 #define SOCK_NONBLOCK 00004000
 298 #endif
 299
 300 #ifndef HAVE_ASPRINTF
 301 /* asprintf.c */
 302 int              asprintf(char **, const char *, ...);
 303 int              vasprintf(char **, const char *, va_list);
 304 #endif
 305
 306 #ifndef HAVE_EXPLICIT_BZERO
 307 /* explicit_bzero.c */
 308 void             explicit_bzero(void *, size_t);
 309 #endif
 310
 311 #ifndef HAVE_GETDTABLECOUNT
 312 /* getdtablecount.c */
 313 int              getdtablecount(void);
 314 #endif
 315
 316 #ifndef HAVE_CLOSEFROM
 317 /* closefrom.c */
 318 void             closefrom(int);
 319 #endif
 320
 321 #ifndef HAVE_STRSEP
 322 /* strsep.c */
 323 char            *strsep(char **, const char *);
 324 #endif
 325
 326 #ifndef HAVE_STRTONUM
 327 /* strtonum.c */
 328 long long        strtonum(const char *, long long, long long, const char **);
 329 #endif
 330
 331 #ifndef HAVE_STRLCPY
 332 /* strlcpy.c */
 333 size_t           strlcpy(char *, const char *, size_t);
 334 #endif
 335
 336 #ifndef HAVE_STRLCAT
 337 /* strlcat.c */
 338 size_t           strlcat(char *, const char *, size_t);
 339 #endif
 340
 341 #ifndef HAVE_STRNLEN
 342 /* strnlen.c */
 343 size_t           strnlen(const char *, size_t);
 344 #endif
 345
 346 #ifndef HAVE_STRNDUP
 347 /* strndup.c */
 348 char            *strndup(const char *, size_t);
 349 #endif
 350
 351 #ifndef HAVE_GETPROGNAME
 352 /* getprogname.c */
 353 const char      *getprogname(void);
 354 #endif
 355
 356 #ifndef HAVE_GETLINE
 357 /* getline.c */
 358 ssize_t          getline(char **, size_t *, FILE *);
 359 #endif
 360
 361 #ifndef HAVE_FREEZERO
 362 /* freezero.c */
 363 void             freezero(void *, size_t);
 364 #endif
 365
 366 #ifndef HAVE_GETDTABLECOUNT
 367 /* getdtablecount.c */
 368 int              getdtablecount(void);
 369 #endif
 370
 371 #ifndef HAVE_REALLOCARRAY
 372 /* reallocarray.c */
 373 void            *reallocarray(void *, size_t, size_t);
 374 #endif
 375
 376 #ifndef HAVE_RECALLOCARRAY
 377 /* recallocarray.c */
 378 void            *recallocarray(void *, size_t, size_t, size_t);
 379 #endif
 380
 381 #ifndef HAVE_SETPROCTITLE
 382 /* setproctitle.c */
 383 void             setproctitle(const char *, ...);
 384 #endif
 385
 386 #ifndef HAVE_FMT_SCALED
 387 /* fmt_scaled.c */
 388 int fmt_scaled(long long, char *);
 389 int scan_scaled(char *, long long *);
 390 #define FMT_SCALED_STRSIZE      7  /* minus sign, 4 digits, suffix, null byte */
 391 #endif
 392
 393 #if !defined(HAVE_LIBBSD) && !defined(HAVE_GETOPT_OPTRESET)
 394 /* getopt.c */
 395 extern int      BSDopterr;
 396 extern int      BSDoptind;
 397 extern int      BSDoptopt;
 398 extern int      BSDoptreset;
 399 extern char    *BSDoptarg;
 400 int     BSDgetopt(int, char *const *, const char *);
 401 #define getopt(ac, av, o)  BSDgetopt(ac, av, o)
 402 #define opterr             BSDopterr
 403 #define optind             BSDoptind
 404 #define optopt             BSDoptopt
 405 #define optreset           BSDoptreset
 406 #define optarg             BSDoptarg
 407 #endif
 408
 409 /* Check for some of the non-portable timespec*() functions.
 410  * This should largely come from libbsd for systems which
 411  * aren't BSD, but this will depend on how old the library
 412  * is.
 413  */
 414 #ifndef timespecisset
 415 #define timespecisset(tsp) \
 416         ((tsp)->tv_sec || (tsp)->tv_nsec)
 417 #endif
 418
 419 #ifndef timespecsub
 420 #define timespecsub(tsp, usp, vsp)                                      \
 421         do {                                                            \
 422                 (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;          \
 423                 (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;       \
 424                 if ((vsp)->tv_nsec < 0) {                               \
 425                         (vsp)->tv_sec--;                                \
 426                         (vsp)->tv_nsec += 1000000000L;                  \
 427                 }                                                       \
 428         } while (0)
 429 #endif
 430
 431 #ifndef timespeccmp
 432 #define timespeccmp(tvp, uvp, cmp)                                      \
 433 (((tvp)->tv_sec == (uvp)->tv_sec) ?                                     \
 434         ((tvp)->tv_nsec cmp (uvp)->tv_nsec) :                           \
 435         ((tvp)->tv_sec cmp (uvp)->tv_sec))
 436 #endif
 437
 438 #ifndef HAVE_MERGESORT
 439 /* mergesort.c */
 440 int mergesort(void *, size_t, size_t, int (*)(const void *, const void *));
 441 #endif
 442 #endif