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 #ifndef UID_MAX
  67 # define UID_MAX        UINT_MAX        /* max value for a uid_t */
  68 #endif
  69 #ifndef GID_MAX
  70 # define GID_MAX        UINT_MAX        /* max value for a gid_t */
  71 #endif
  72
  73 /* For flock. */
  74 #ifndef O_EXLOCK
  75 #define O_EXLOCK 0
  76 #endif
  77
  78 #ifndef HAVE_FLOCK
  79 #define LOCK_SH 0
  80 #define LOCK_EX 0
  81 #define LOCK_NB 0
  82 #define flock(fd, op) (0)
  83 #else
  84 #include <sys/file.h>
  85 #endif
  86
  87 /* POSIX doesn't define WAIT_ANY, so provide it if it's not found. */
  88 #ifndef WAIT_ANY
  89 #define WAIT_ANY (-1)
  90 #endif
  91
  92 /* On FreeBSD (and possibly others), EAI_NODATA was removed, in favour of
  93  * using EAI_NONAME.
  94  */
  95 #ifndef EAI_NODATA
  96 #define EAI_NODATA EAI_NONAME
  97 #endif
  98
  99 #ifndef __dead
 100 #define __dead __attribute__ ((__noreturn__))
 101 #endif
 102
 103 #ifndef __unused
 104 #define __unused __attribute__ ((__unused__))
 105 #endif
 106
 107 #ifndef __OpenBSD__
 108 #define pledge(s, p) (0)
 109 #define unveil(s, p) (0)
 110 #endif
 111
 112 #ifndef __FreeBSD__
 113 #define cap_enter() (0)
 114 #endif
 115
 116 #ifndef HAVE_B64_NTOP
 117 #undef b64_ntop
 118 #undef b64_pton
 119 int              b64_ntop(u_char const *, size_t, char *, size_t);
 120 int              b64_pton(char const *, u_char *, size_t);
 121 #endif
 122
 123 #ifndef HAVE_SETRESGID
 124 #define setresgid(a, b, c) (0)
 125 #endif
 126
 127 #ifndef HAVE_SETRESUID
 128 #define setresuid(a, b, c) (0)
 129 #endif
 130
 131 #ifndef HAVE_LINUX_LANDLOCK_H
 132 #define landlock_no_fs() (0)
 133 #else
 134 int     landlock_no_fs(void);
 135 #endif
 136
 137 #ifndef INFTIM
 138 #define INFTIM -1
 139 #endif
 140
 141 #ifndef HAVE_BSD_UUID
 142 #include <uuid/uuid.h>
 143 #define uuid_s_ok 0
 144 #define uuid_s_bad_version  1
 145 #define uuid_s_invalid_string_uuid 2
 146 #define uuid_s_no_memory  3
 147
 148 /* Length of a node address (an IEEE 802 address). */
 149 #define _UUID_NODE_LEN  6
 150
 151 struct uuid {
 152         uint32_t time_low;
 153         uint16_t time_mid;
 154         uint16_t time_hi_and_version;
 155         uint8_t  clock_seq_hi_and_reserved;
 156         uint8_t  clock_seq_low;
 157         uint8_t  node[_UUID_NODE_LEN];
 158 };
 159
 160 int32_t uuid_equal(struct uuid *, struct uuid *, uint32_t *);
 161 int32_t uuid_is_nil(struct uuid *, uint32_t *);
 162 void uuid_create(uuid_t *, uint32_t *);
 163 void uuid_create_nil(struct uuid *, uint32_t *);
 164 void uuid_from_string(const char *, uuid_t *, uint32_t *);
 165 void uuid_to_string(uuid_t *, char **, uint32_t *);
 166 #else
 167 #include <uuid.h>
 168 #endif
 169
 170 #ifdef HAVE_STDINT_H
 171 #include <stdint.h>
 172 #else
 173 #include <inttypes.h>
 174 #endif
 175
 176 #ifdef HAVE_QUEUE_H
 177 #include <sys/queue.h>
 178 #endif
 179
 180 #ifndef HAVE_TREE_H
 181 #include "compat/tree.h"
 182 #else
 183 #include <sys/tree.h>
 184 #endif
 185
 186 #ifdef HAVE_UTIL_H
 187 #include <util.h>
 188 #endif
 189
 190 #ifdef HAVE_LIBUTIL_H
 191 #include <libutil.h>
 192 #endif
 193
 194 #ifndef IOV_MAX
 195 # define IOV_MAX 1024
 196 #endif
 197
 198 #ifndef HAVE_IMSG
 199 #include "compat/imsg.h"
 200 #else
 201 #include <imsg.h>
 202 #endif
 203
 204 #ifndef HAVE_SIPHASH
 205 #include "compat/siphash.h"
 206 #else
 207 #include <siphash.h>
 208 #endif
 209
 210 /* Include Apple-specific headers.  Mostly for crypto.*/
 211 #if defined(__APPLE__)
 212 #define COMMON_DIGEST_FOR_OPENSSL
 213 #include <CommonCrypto/CommonDigest.h>
 214
 215 #define SHA512_BLOCK_LENGTH             128
 216 typedef struct _SHA2_CTX {
 217         union {
 218                 u_int32_t       st32[8];
 219                 u_int64_t       st64[8];
 220         } state;
 221         u_int64_t       bitcount[2];
 222         u_int8_t        buffer[SHA512_BLOCK_LENGTH];
 223 } SHA2_CTX;
 224 #endif
 225
 226 #if defined(__APPLE__) || defined(__NetBSD__)
 227 #define SHA256Init SHA256_Init
 228 #define SHA256Update SHA256_Update
 229 #define SHA256Final SHA256_Final
 230 #endif
 231
 232 #ifndef __APPLE__
 233 #ifdef HAVE_SHA_H
 234 #  include <sha.h>
 235 #endif
 236 #ifdef HAVE_SHA1_H
 237 #      include <sha1.h>
 238 #endif
 239 #ifdef HAVE_SHA2_H
 240 #    include <sha2.h>
 241 #else
 242 #    include "sha2.h"
 243 #endif
 244 #ifdef HAVE_SHA256_H
 245 #    include <sha256.h>
 246 #endif
 247 #endif
 248
 249 /* Catch-all for systems where the header files don't exist and/or the below
 250  * still are not defined.
 251  */
 252 #ifndef SHA256_DIGEST_LENGTH
 253 #define SHA256_DIGEST_LENGTH 32
 254 #endif
 255
 256 #ifndef SHA256_DIGEST_STRING_LENGTH
 257 #define SHA256_DIGEST_STRING_LENGTH (SHA256_DIGEST_LENGTH * 2 + 1)
 258 #endif
 259
 260 #if defined(__DragonFly__)
 261 #include <openssl/sha.h>
 262 #endif
 263
 264 #ifndef SHA1_DIGEST_LENGTH
 265 #define SHA1_DIGEST_LENGTH              SHA_DIGEST_LENGTH
 266 #define SHA1_DIGEST_STRING_LENGTH       (SHA1_DIGEST_LENGTH * 2 + 1)
 267
 268 #define SHA1_CTX        SHA_CTX
 269 #define SHA1Init        SHA1_Init
 270 #define SHA1Update      SHA1_Update
 271 #define SHA1Final       SHA1_Final
 272 #endif
 273
 274 /*
 275  * The following SA_LEN/SS_LEN dance comes from various source, notably
 276  * OpenSMTP by way of OpenNTPD and OpenBGPD (thanks everyone!).  got-portable
 277  * has tweaked a lot of the following macros to suit the needs of
 278  * got-portable.
 279  */
 280
 281 /* From OpenNTPD portable */
 282 #if !defined(SA_LEN)
 283 # if defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
 284 #  define SA_LEN(x)     ((x)->sa_len)
 285 # else
 286 #  define SA_LEN(x)     ((x)->sa_family == AF_INET6 ? \
 287                         sizeof(struct sockaddr_in6) : \
 288                         sizeof(struct sockaddr_in))
 289 # endif
 290
 291 #endif
 292
 293 /* From OpenBGPD portable */
 294 #if !defined(SS_LEN)
 295 # if defined(HAVE_STRUCT_SOCKADDR_STORAGE_SS_LEN)
 296 #  define SS_LEN(x)  ((x)->ss_len)
 297 # else
 298 #  define SS_LEN(x)  SA_LEN((struct sockaddr *)(x))
 299 # endif
 300 #endif
 301
 302 /* SOCK_NONBLOCK isn't available across BSDs... */
 303 #if !defined(SOCK_NONBLOCK) && !defined(__linux__)
 304 #define SOCK_NONBLOCK 00004000
 305 #endif
 306
 307 #ifndef HAVE_ASPRINTF
 308 /* asprintf.c */
 309 int              asprintf(char **, const char *, ...);
 310 int              vasprintf(char **, const char *, va_list);
 311 #endif
 312
 313 #ifndef HAVE_EXPLICIT_BZERO
 314 /* explicit_bzero.c */
 315 void             explicit_bzero(void *, size_t);
 316 #endif
 317
 318 #ifndef HAVE_GETDTABLECOUNT
 319 /* getdtablecount.c */
 320 int              getdtablecount(void);
 321 #endif
 322
 323 #ifndef HAVE_CLOSEFROM
 324 /* closefrom.c */
 325 void             closefrom(int);
 326 #endif
 327
 328 #ifndef HAVE_STRSEP
 329 /* strsep.c */
 330 char            *strsep(char **, const char *);
 331 #endif
 332
 333 #ifndef HAVE_STRTONUM
 334 /* strtonum.c */
 335 long long        strtonum(const char *, long long, long long, const char **);
 336 #endif
 337
 338 #ifndef HAVE_STRLCPY
 339 /* strlcpy.c */
 340 size_t           strlcpy(char *, const char *, size_t);
 341 #endif
 342
 343 #ifndef HAVE_STRLCAT
 344 /* strlcat.c */
 345 size_t           strlcat(char *, const char *, size_t);
 346 #endif
 347
 348 #ifndef HAVE_STRNLEN
 349 /* strnlen.c */
 350 size_t           strnlen(const char *, size_t);
 351 #endif
 352
 353 #ifndef HAVE_STRNDUP
 354 /* strndup.c */
 355 char            *strndup(const char *, size_t);
 356 #endif
 357
 358 #ifndef HAVE_GETPROGNAME
 359 /* getprogname.c */
 360 const char      *getprogname(void);
 361 #endif
 362
 363 #ifndef HAVE_GETLINE
 364 /* getline.c */
 365 ssize_t          getline(char **, size_t *, FILE *);
 366 #endif
 367
 368 #ifndef HAVE_FREEZERO
 369 /* freezero.c */
 370 void             freezero(void *, size_t);
 371 #endif
 372
 373 #ifndef HAVE_GETDTABLECOUNT
 374 /* getdtablecount.c */
 375 int              getdtablecount(void);
 376 #endif
 377
 378 #ifndef HAVE_REALLOCARRAY
 379 /* reallocarray.c */
 380 void            *reallocarray(void *, size_t, size_t);
 381 #endif
 382
 383 #ifndef HAVE_RECALLOCARRAY
 384 /* recallocarray.c */
 385 void            *recallocarray(void *, size_t, size_t, size_t);
 386 #endif
 387
 388 #ifndef HAVE_SETPROCTITLE
 389 /* setproctitle.c */
 390 void             setproctitle(const char *, ...);
 391 #endif
 392
 393 #ifndef HAVE_FMT_SCALED
 394 /* fmt_scaled.c */
 395 int fmt_scaled(long long, char *);
 396 int scan_scaled(char *, long long *);
 397 #define FMT_SCALED_STRSIZE      7  /* minus sign, 4 digits, suffix, null byte */
 398 #endif
 399
 400 #if !defined(HAVE_LIBBSD) && !defined(HAVE_GETOPT_OPTRESET)
 401 /* getopt.c */
 402 extern int      BSDopterr;
 403 extern int      BSDoptind;
 404 extern int      BSDoptopt;
 405 extern int      BSDoptreset;
 406 extern char    *BSDoptarg;
 407 int     BSDgetopt(int, char *const *, const char *);
 408 #define getopt(ac, av, o)  BSDgetopt(ac, av, o)
 409 #define opterr             BSDopterr
 410 #define optind             BSDoptind
 411 #define optopt             BSDoptopt
 412 #define optreset           BSDoptreset
 413 #define optarg             BSDoptarg
 414 #endif
 415
 416 /* Check for some of the non-portable timespec*() functions.
 417  * This should largely come from libbsd for systems which
 418  * aren't BSD, but this will depend on how old the library
 419  * is.
 420  */
 421 #ifndef timespecisset
 422 #define timespecisset(tsp) \
 423         ((tsp)->tv_sec || (tsp)->tv_nsec)
 424 #endif
 425
 426 #ifndef timespecsub
 427 #define timespecsub(tsp, usp, vsp)                                      \
 428         do {                                                            \
 429                 (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;          \
 430                 (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;       \
 431                 if ((vsp)->tv_nsec < 0) {                               \
 432                         (vsp)->tv_sec--;                                \
 433                         (vsp)->tv_nsec += 1000000000L;                  \
 434                 }                                                       \
 435         } while (0)
 436 #endif
 437
 438 #ifndef timespeccmp
 439 #define timespeccmp(tvp, uvp, cmp)                                      \
 440 (((tvp)->tv_sec == (uvp)->tv_sec) ?                                     \
 441         ((tvp)->tv_nsec cmp (uvp)->tv_nsec) :                           \
 442         ((tvp)->tv_sec cmp (uvp)->tv_sec))
 443 #endif
 444
 445 #ifndef HAVE_MERGESORT
 446 /* mergesort.c */
 447 int mergesort(void *, size_t, size_t, int (*)(const void *, const void *));
 448 #endif
 449 #endif