platform.h 18 KB

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * Copyright 2006, Bernhard Reutner-Fischer
  4. *
  5. * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  6. */
  7. #ifndef BB_PLATFORM_H
  8. #define BB_PLATFORM_H 1
  9. /* Convenience macros to test the version of gcc. */
  10. #undef __GNUC_PREREQ
  11. #if defined __GNUC__ && defined __GNUC_MINOR__
  12. # define __GNUC_PREREQ(maj, min) \
  13. ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
  14. #else
  15. # define __GNUC_PREREQ(maj, min) 0
  16. #endif
  17. /* __restrict is known in EGCS 1.2 and above. */
  18. #if !__GNUC_PREREQ(2,92)
  19. # ifndef __restrict
  20. # define __restrict
  21. # endif
  22. #endif
  23. #if !__GNUC_PREREQ(2,7)
  24. # ifndef __attribute__
  25. # define __attribute__(x)
  26. # endif
  27. #endif
  28. #if !__GNUC_PREREQ(5,0)
  29. # define deprecated(msg) deprecated
  30. #endif
  31. #undef inline
  32. #if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L
  33. /* it's a keyword */
  34. #elif __GNUC_PREREQ(2,7)
  35. # define inline __inline__
  36. #else
  37. # define inline
  38. #endif
  39. #ifndef __const
  40. # define __const const
  41. #endif
  42. #define UNUSED_PARAM __attribute__ ((__unused__))
  43. #define NORETURN __attribute__ ((__noreturn__))
  44. #if __GNUC_PREREQ(4,5)
  45. # define bb_unreachable(altcode) __builtin_unreachable()
  46. #else
  47. # define bb_unreachable(altcode) altcode
  48. #endif
  49. /* "The malloc attribute is used to tell the compiler that a function
  50. * may be treated as if any non-NULL pointer it returns cannot alias
  51. * any other pointer valid when the function returns. This will often
  52. * improve optimization. Standard functions with this property include
  53. * malloc and calloc. realloc-like functions have this property as long
  54. * as the old pointer is never referred to (including comparing it
  55. * to the new pointer) after the function returns a non-NULL value."
  56. */
  57. #define RETURNS_MALLOC __attribute__ ((malloc))
  58. #define PACKED __attribute__ ((__packed__))
  59. #define ALIGNED(m) __attribute__ ((__aligned__(m)))
  60. /* __NO_INLINE__: some gcc's do not honor inlining! :( */
  61. #if __GNUC_PREREQ(3,0) && !defined(__NO_INLINE__)
  62. # define ALWAYS_INLINE __attribute__ ((always_inline)) inline
  63. /* I've seen a toolchain where I needed __noinline__ instead of noinline */
  64. # define NOINLINE __attribute__((__noinline__))
  65. # if !ENABLE_WERROR
  66. # define DEPRECATED __attribute__ ((__deprecated__))
  67. # define UNUSED_PARAM_RESULT __attribute__ ((warn_unused_result))
  68. # else
  69. # define DEPRECATED
  70. # define UNUSED_PARAM_RESULT
  71. # endif
  72. #else
  73. # define ALWAYS_INLINE inline
  74. # define NOINLINE
  75. # define DEPRECATED
  76. # define UNUSED_PARAM_RESULT
  77. #endif
  78. /* used by unit test machinery to run registration functions before calling main() */
  79. #define INIT_FUNC __attribute__ ((constructor))
  80. /* -fwhole-program makes all symbols local. The attribute externally_visible
  81. * forces a symbol global. */
  82. #if __GNUC_PREREQ(4,1)
  83. # define EXTERNALLY_VISIBLE __attribute__(( visibility("default") ))
  84. //__attribute__ ((__externally_visible__))
  85. #else
  86. # define EXTERNALLY_VISIBLE
  87. #endif
  88. /* At 4.4 gcc become much more anal about this, need to use "aliased" types */
  89. #if __GNUC_PREREQ(4,4)
  90. # define FIX_ALIASING __attribute__((__may_alias__))
  91. #else
  92. # define FIX_ALIASING
  93. #endif
  94. /* We use __extension__ in some places to suppress -pedantic warnings
  95. * about GCC extensions. This feature didn't work properly before
  96. * gcc 2.8. */
  97. #if !__GNUC_PREREQ(2,8)
  98. # ifndef __extension__
  99. # define __extension__
  100. # endif
  101. #endif
  102. /* FAST_FUNC is a qualifier which (possibly) makes function call faster
  103. * and/or smaller by using modified ABI. It is usually only needed
  104. * on non-static, busybox internal functions. Recent versions of gcc
  105. * optimize statics automatically. FAST_FUNC on static is required
  106. * only if you need to match a function pointer's type.
  107. * FAST_FUNC may not work well with -flto so allow user to disable this.
  108. * (-DFAST_FUNC= )
  109. */
  110. #ifndef FAST_FUNC
  111. # if __GNUC_PREREQ(3,0) && defined(i386)
  112. /* stdcall makes callee to pop arguments from stack, not caller */
  113. # define FAST_FUNC __attribute__((regparm(3),stdcall))
  114. /* #elif ... - add your favorite arch today! */
  115. # else
  116. # define FAST_FUNC
  117. # endif
  118. #endif
  119. /* Make all declarations hidden (-fvisibility flag only affects definitions) */
  120. /* (don't include system headers after this until corresponding pop!) */
  121. #if __GNUC_PREREQ(4,1) && !defined(__CYGWIN__)
  122. # define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN _Pragma("GCC visibility push(hidden)")
  123. # define POP_SAVED_FUNCTION_VISIBILITY _Pragma("GCC visibility pop")
  124. #else
  125. # define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
  126. # define POP_SAVED_FUNCTION_VISIBILITY
  127. #endif
  128. /* gcc-2.95 had no va_copy but only __va_copy. */
  129. #if !__GNUC_PREREQ(3,0)
  130. # include <stdarg.h>
  131. # if !defined va_copy && defined __va_copy
  132. # define va_copy(d,s) __va_copy((d),(s))
  133. # endif
  134. #endif
  135. /* ---- Endian Detection ------------------------------------ */
  136. #include <limits.h>
  137. #if defined(__digital__) && defined(__unix__)
  138. # include <sex.h>
  139. #elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \
  140. || defined(__APPLE__)
  141. # include <sys/resource.h> /* rlimit */
  142. # include <machine/endian.h>
  143. # define bswap_64 __bswap64
  144. # define bswap_32 __bswap32
  145. # define bswap_16 __bswap16
  146. #else
  147. # include <byteswap.h>
  148. # include <endian.h>
  149. #endif
  150. #if defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN
  151. # define BB_BIG_ENDIAN 1
  152. # define BB_LITTLE_ENDIAN 0
  153. #elif defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN
  154. # define BB_BIG_ENDIAN 0
  155. # define BB_LITTLE_ENDIAN 1
  156. #elif defined(_BYTE_ORDER) && _BYTE_ORDER == _BIG_ENDIAN
  157. # define BB_BIG_ENDIAN 1
  158. # define BB_LITTLE_ENDIAN 0
  159. #elif defined(_BYTE_ORDER) && _BYTE_ORDER == _LITTLE_ENDIAN
  160. # define BB_BIG_ENDIAN 0
  161. # define BB_LITTLE_ENDIAN 1
  162. #elif defined(BYTE_ORDER) && BYTE_ORDER == BIG_ENDIAN
  163. # define BB_BIG_ENDIAN 1
  164. # define BB_LITTLE_ENDIAN 0
  165. #elif defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN
  166. # define BB_BIG_ENDIAN 0
  167. # define BB_LITTLE_ENDIAN 1
  168. #elif defined(__386__)
  169. # define BB_BIG_ENDIAN 0
  170. # define BB_LITTLE_ENDIAN 1
  171. #else
  172. # error "Can't determine endianness"
  173. #endif
  174. #if ULONG_MAX > 0xffffffff
  175. # define bb_bswap_64(x) bswap_64(x)
  176. #endif
  177. /* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */
  178. #if BB_BIG_ENDIAN
  179. # define SWAP_BE16(x) (x)
  180. # define SWAP_BE32(x) (x)
  181. # define SWAP_BE64(x) (x)
  182. # define SWAP_LE16(x) bswap_16(x)
  183. # define SWAP_LE32(x) bswap_32(x)
  184. # define SWAP_LE64(x) bb_bswap_64(x)
  185. # define IF_BIG_ENDIAN(...) __VA_ARGS__
  186. # define IF_LITTLE_ENDIAN(...)
  187. #else
  188. # define SWAP_BE16(x) bswap_16(x)
  189. # define SWAP_BE32(x) bswap_32(x)
  190. # define SWAP_BE64(x) bb_bswap_64(x)
  191. # define SWAP_LE16(x) (x)
  192. # define SWAP_LE32(x) (x)
  193. # define SWAP_LE64(x) (x)
  194. # define IF_BIG_ENDIAN(...)
  195. # define IF_LITTLE_ENDIAN(...) __VA_ARGS__
  196. #endif
  197. /* ---- Unaligned access ------------------------------------ */
  198. #include <stdint.h>
  199. typedef int bb__aliased_int FIX_ALIASING;
  200. typedef long bb__aliased_long FIX_ALIASING;
  201. typedef uint16_t bb__aliased_uint16_t FIX_ALIASING;
  202. typedef uint32_t bb__aliased_uint32_t FIX_ALIASING;
  203. typedef uint64_t bb__aliased_uint64_t FIX_ALIASING;
  204. /* NB: unaligned parameter should be a pointer, aligned one -
  205. * a lvalue. This makes it more likely to not swap them by mistake
  206. */
  207. #if defined(i386) || defined(__x86_64__) || defined(__powerpc__)
  208. # define BB_UNALIGNED_MEMACCESS_OK 1
  209. # define move_from_unaligned_int(v, intp) ((v) = *(bb__aliased_int*)(intp))
  210. # define move_from_unaligned_long(v, longp) ((v) = *(bb__aliased_long*)(longp))
  211. # define move_from_unaligned16(v, u16p) ((v) = *(bb__aliased_uint16_t*)(u16p))
  212. # define move_from_unaligned32(v, u32p) ((v) = *(bb__aliased_uint32_t*)(u32p))
  213. # define move_to_unaligned16(u16p, v) (*(bb__aliased_uint16_t*)(u16p) = (v))
  214. # define move_to_unaligned32(u32p, v) (*(bb__aliased_uint32_t*)(u32p) = (v))
  215. # define move_to_unaligned64(u64p, v) (*(bb__aliased_uint64_t*)(u64p) = (v))
  216. /* #elif ... - add your favorite arch today! */
  217. #else
  218. # define BB_UNALIGNED_MEMACCESS_OK 0
  219. /* performs reasonably well (gcc usually inlines memcpy here) */
  220. # define move_from_unaligned_int(v, intp) (memcpy(&(v), (intp), sizeof(int)))
  221. # define move_from_unaligned_long(v, longp) (memcpy(&(v), (longp), sizeof(long)))
  222. # define move_from_unaligned16(v, u16p) (memcpy(&(v), (u16p), 2))
  223. # define move_from_unaligned32(v, u32p) (memcpy(&(v), (u32p), 4))
  224. # define move_to_unaligned16(u16p, v) do { \
  225. uint16_t __t = (v); \
  226. memcpy((u16p), &__t, 2); \
  227. } while (0)
  228. # define move_to_unaligned32(u32p, v) do { \
  229. uint32_t __t = (v); \
  230. memcpy((u32p), &__t, 4); \
  231. } while (0)
  232. # define move_to_unaligned64(u64p, v) do { \
  233. uint64_t __t = (v); \
  234. memcpy((u64p), &__t, 8); \
  235. } while (0)
  236. #endif
  237. /* Unaligned, fixed-endian accessors */
  238. #define get_unaligned_le32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_LE32(v); })
  239. #define get_unaligned_be32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_BE32(v); })
  240. #define put_unaligned_le32(val, buf) move_to_unaligned32(buf, SWAP_LE32(val))
  241. #define put_unaligned_be32(val, buf) move_to_unaligned32(buf, SWAP_BE32(val))
  242. /* unxz needs an aligned fixed-endian accessor.
  243. * (however, the compiler does not realize it's aligned, the cast is still necessary)
  244. */
  245. #define get_le32(u32p) ({ uint32_t v = *(bb__aliased_uint32_t*)(u32p); SWAP_LE32(v); })
  246. /* ---- Size-saving "small" ints (arch-dependent) ----------- */
  247. #if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__)
  248. /* add other arches which benefit from this... */
  249. typedef signed char smallint;
  250. typedef unsigned char smalluint;
  251. #else
  252. /* for arches where byte accesses generate larger code: */
  253. typedef int smallint;
  254. typedef unsigned smalluint;
  255. #endif
  256. /* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */
  257. #if (defined __digital__ && defined __unix__)
  258. /* old system without (proper) C99 support */
  259. # define bool smalluint
  260. #else
  261. /* modern system, so use it */
  262. # include <stdbool.h>
  263. #endif
  264. /*----- Kernel versioning ------------------------------------*/
  265. #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
  266. #ifdef __UCLIBC__
  267. # define UCLIBC_VERSION KERNEL_VERSION(__UCLIBC_MAJOR__, __UCLIBC_MINOR__, __UCLIBC_SUBLEVEL__)
  268. #else
  269. # define UCLIBC_VERSION 0
  270. #endif
  271. /* ---- Miscellaneous --------------------------------------- */
  272. #if defined __GLIBC__ \
  273. || defined __UCLIBC__ \
  274. || defined __dietlibc__ \
  275. || defined __BIONIC__ \
  276. || defined _NEWLIB_VERSION
  277. # include <features.h>
  278. #endif
  279. /* Define bb_setpgrp */
  280. #if (defined(__digital__) && defined(__unix__)) || defined(__FreeBSD__)
  281. /* use legacy setpgrp(pid_t, pid_t) for now. move to platform.c */
  282. # define bb_setpgrp() do { pid_t __me = getpid(); setpgrp(__me, __me); } while (0)
  283. #else
  284. # define bb_setpgrp() setpgrp()
  285. #endif
  286. /* fdprintf is more readable, we used it before dprintf was standardized */
  287. #include <unistd.h>
  288. #define fdprintf dprintf
  289. /* Useful for defeating gcc's alignment of "char message[]"-like data */
  290. #if !defined(__s390__)
  291. /* on s390[x], non-word-aligned data accesses require larger code */
  292. # define ALIGN1 __attribute__((aligned(1)))
  293. # define ALIGN2 __attribute__((aligned(2)))
  294. # define ALIGN4 __attribute__((aligned(4)))
  295. #else
  296. /* Arches which MUST have 2 or 4 byte alignment for everything are here */
  297. # define ALIGN1
  298. # define ALIGN2
  299. # define ALIGN4
  300. #endif
  301. #define ALIGN8 __attribute__((aligned(8)))
  302. #define ALIGN_PTR __attribute__((aligned(sizeof(void*))))
  303. /*
  304. * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably.
  305. * For earlier versions there is no reliable way to check if we are building
  306. * for a mmu-less system.
  307. */
  308. #if ENABLE_NOMMU || \
  309. (defined __UCLIBC__ && \
  310. UCLIBC_VERSION > KERNEL_VERSION(0, 9, 28) && \
  311. !defined __ARCH_USE_MMU__)
  312. # define BB_MMU 0
  313. # define USE_FOR_NOMMU(...) __VA_ARGS__
  314. # define USE_FOR_MMU(...)
  315. #else
  316. # define BB_MMU 1
  317. # define USE_FOR_NOMMU(...)
  318. # define USE_FOR_MMU(...) __VA_ARGS__
  319. #endif
  320. #if defined(__digital__) && defined(__unix__)
  321. # include <standards.h>
  322. # include <inttypes.h>
  323. # define PRIu32 "u"
  324. # if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
  325. # define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
  326. # endif
  327. # if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
  328. # define ADJ_FREQUENCY MOD_FREQUENCY
  329. # endif
  330. # if !defined ADJ_TIMECONST && defined MOD_TIMECONST
  331. # define ADJ_TIMECONST MOD_TIMECONST
  332. # endif
  333. # if !defined ADJ_TICK && defined MOD_CLKB
  334. # define ADJ_TICK MOD_CLKB
  335. # endif
  336. #endif
  337. #if defined(__CYGWIN__)
  338. # define MAXSYMLINKS SYMLOOP_MAX
  339. #endif
  340. #if defined(ANDROID) || defined(__ANDROID__)
  341. # define BB_ADDITIONAL_PATH ":/system/sbin:/system/bin:/system/xbin"
  342. # define SYS_ioprio_set __NR_ioprio_set
  343. # define SYS_ioprio_get __NR_ioprio_get
  344. #endif
  345. /* ---- Who misses what? ------------------------------------ */
  346. /* Assume all these functions and header files exist by default.
  347. * Platforms where it is not true will #undef them below.
  348. */
  349. #define HAVE_CLEARENV 1
  350. #define HAVE_FDATASYNC 1
  351. #define HAVE_DPRINTF 1
  352. #define HAVE_MEMRCHR 1
  353. #define HAVE_MKDTEMP 1
  354. #define HAVE_TTYNAME_R 1
  355. #define HAVE_PTSNAME_R 1
  356. #define HAVE_SETBIT 1
  357. #define HAVE_SIGHANDLER_T 1
  358. #define HAVE_STPCPY 1
  359. #define HAVE_STPNCPY 1
  360. #define HAVE_MEMPCPY 1
  361. #define HAVE_STRCASESTR 1
  362. #define HAVE_STRCHRNUL 1
  363. #define HAVE_STRSEP 1
  364. #define HAVE_STRSIGNAL 1
  365. #define HAVE_STRVERSCMP 1
  366. #define HAVE_VASPRINTF 1
  367. #define HAVE_USLEEP 1
  368. #define HAVE_UNLOCKED_STDIO 1
  369. #define HAVE_UNLOCKED_LINE_OPS 1
  370. #define HAVE_GETLINE 1
  371. #define HAVE_XTABS 1
  372. #define HAVE_MNTENT_H 1
  373. #define HAVE_NET_ETHERNET_H 1
  374. #define HAVE_SYS_STATFS_H 1
  375. #define HAVE_PRINTF_PERCENTM 1
  376. #if defined(__UCLIBC__)
  377. # if UCLIBC_VERSION < KERNEL_VERSION(0, 9, 32)
  378. # undef HAVE_STRVERSCMP
  379. # endif
  380. # if UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 30)
  381. # ifndef __UCLIBC_SUSV3_LEGACY__
  382. # undef HAVE_USLEEP
  383. # endif
  384. # endif
  385. #endif
  386. #if defined(__WATCOMC__)
  387. # undef HAVE_DPRINTF
  388. # undef HAVE_GETLINE
  389. # undef HAVE_MEMRCHR
  390. # undef HAVE_MKDTEMP
  391. # undef HAVE_SETBIT
  392. # undef HAVE_STPCPY
  393. # undef HAVE_STPNCPY
  394. # undef HAVE_STRCASESTR
  395. # undef HAVE_STRCHRNUL
  396. # undef HAVE_STRSEP
  397. # undef HAVE_STRSIGNAL
  398. # undef HAVE_STRVERSCMP
  399. # undef HAVE_VASPRINTF
  400. # undef HAVE_UNLOCKED_STDIO
  401. # undef HAVE_UNLOCKED_LINE_OPS
  402. # undef HAVE_NET_ETHERNET_H
  403. #endif
  404. #if defined(__CYGWIN__)
  405. # undef HAVE_CLEARENV
  406. # undef HAVE_FDPRINTF
  407. # undef HAVE_MEMRCHR
  408. # undef HAVE_PTSNAME_R
  409. # undef HAVE_STRVERSCMP
  410. # undef HAVE_UNLOCKED_LINE_OPS
  411. #endif
  412. /* These BSD-derived OSes share many similarities */
  413. #if (defined __digital__ && defined __unix__) \
  414. || defined __APPLE__ \
  415. || defined __OpenBSD__ || defined __NetBSD__
  416. # undef HAVE_CLEARENV
  417. # undef HAVE_FDATASYNC
  418. # undef HAVE_GETLINE
  419. # undef HAVE_MNTENT_H
  420. # undef HAVE_PTSNAME_R
  421. # undef HAVE_SYS_STATFS_H
  422. # undef HAVE_SIGHANDLER_T
  423. # undef HAVE_STRVERSCMP
  424. # undef HAVE_XTABS
  425. # undef HAVE_DPRINTF
  426. # undef HAVE_UNLOCKED_STDIO
  427. # undef HAVE_UNLOCKED_LINE_OPS
  428. # undef HAVE_PRINTF_PERCENTM
  429. #endif
  430. #if defined(__dietlibc__)
  431. # undef HAVE_STRCHRNUL
  432. #endif
  433. #if defined(__APPLE__)
  434. # undef HAVE_STRCHRNUL
  435. #endif
  436. #if defined(__FreeBSD__)
  437. /* users say mempcpy is not present in FreeBSD 9.x */
  438. # undef HAVE_MEMPCPY
  439. # undef HAVE_CLEARENV
  440. # undef HAVE_FDATASYNC
  441. # undef HAVE_MNTENT_H
  442. # undef HAVE_PTSNAME_R
  443. # undef HAVE_SYS_STATFS_H
  444. # undef HAVE_SIGHANDLER_T
  445. # undef HAVE_STRVERSCMP
  446. # undef HAVE_XTABS
  447. # undef HAVE_UNLOCKED_LINE_OPS
  448. # undef HAVE_PRINTF_PERCENTM
  449. # include <osreldate.h>
  450. # if __FreeBSD_version < 1000029
  451. # undef HAVE_STRCHRNUL /* FreeBSD added strchrnul() between 1000028 and 1000029 */
  452. # endif
  453. #endif
  454. #if defined(__NetBSD__)
  455. # define HAVE_GETLINE 1 /* Recent NetBSD versions have getline() */
  456. #endif
  457. #if defined(__digital__) && defined(__unix__)
  458. # undef HAVE_STPCPY
  459. # undef HAVE_STPNCPY
  460. #endif
  461. #if defined(ANDROID) || defined(__ANDROID__)
  462. # if __ANDROID_API__ < 8
  463. /* ANDROID < 8 has no [f]dprintf at all */
  464. # undef HAVE_DPRINTF
  465. # elif __ANDROID_API__ < 21
  466. /* ANDROID < 21 has fdprintf */
  467. # define dprintf fdprintf
  468. # else
  469. /* ANDROID >= 21 has standard dprintf */
  470. # endif
  471. # if __ANDROID_API__ < 21
  472. # undef HAVE_TTYNAME_R
  473. # undef HAVE_GETLINE
  474. # undef HAVE_STPCPY
  475. # undef HAVE_STPNCPY
  476. # endif
  477. # undef HAVE_MEMPCPY
  478. # undef HAVE_STRCHRNUL
  479. # undef HAVE_STRVERSCMP
  480. # undef HAVE_UNLOCKED_LINE_OPS
  481. # undef HAVE_NET_ETHERNET_H
  482. # undef HAVE_PRINTF_PERCENTM
  483. #endif
  484. /*
  485. * Now, define prototypes for all the functions defined in platform.c
  486. * These must come after all the HAVE_* macros are defined (or not)
  487. */
  488. #ifndef HAVE_DPRINTF
  489. extern int dprintf(int fd, const char *format, ...);
  490. #endif
  491. #ifndef HAVE_MEMRCHR
  492. extern void *memrchr(const void *s, int c, size_t n) FAST_FUNC;
  493. #endif
  494. #ifndef HAVE_MKDTEMP
  495. extern char *mkdtemp(char *template) FAST_FUNC;
  496. #endif
  497. #ifndef HAVE_TTYNAME_R
  498. #define ttyname_r bb_ttyname_r
  499. extern int ttyname_r(int fd, char *buf, size_t buflen);
  500. #endif
  501. #ifndef HAVE_SETBIT
  502. # define setbit(a, b) ((a)[(b) >> 3] |= 1 << ((b) & 7))
  503. # define clrbit(a, b) ((a)[(b) >> 3] &= ~(1 << ((b) & 7)))
  504. #endif
  505. #ifndef HAVE_SIGHANDLER_T
  506. typedef void (*sighandler_t)(int);
  507. #endif
  508. #ifndef HAVE_STPCPY
  509. extern char *stpcpy(char *p, const char *to_add) FAST_FUNC;
  510. #endif
  511. #ifndef HAVE_STPNCPY
  512. extern char *stpncpy(char *p, const char *to_add, size_t n) FAST_FUNC;
  513. #endif
  514. #ifndef HAVE_MEMPCPY
  515. #include <string.h>
  516. /* In case we are wrong about !HAVE_MEMPCPY, and toolchain _does_ have
  517. * mempcpy(), avoid colliding with it:
  518. */
  519. #define mempcpy bb__mempcpy
  520. static ALWAYS_INLINE void *mempcpy(void *dest, const void *src, size_t len)
  521. {
  522. return memcpy(dest, src, len) + len;
  523. }
  524. #endif
  525. #ifndef HAVE_STRCASESTR
  526. extern char *strcasestr(const char *s, const char *pattern) FAST_FUNC;
  527. #endif
  528. #ifndef HAVE_STRCHRNUL
  529. extern char *strchrnul(const char *s, int c) FAST_FUNC;
  530. #endif
  531. #ifndef HAVE_STRSEP
  532. extern char *strsep(char **stringp, const char *delim) FAST_FUNC;
  533. #endif
  534. #ifndef HAVE_STRSIGNAL
  535. /* Not exactly the same: instead of "Stopped" it shows "STOP" etc */
  536. # define strsignal(sig) get_signame(sig)
  537. #endif
  538. #ifndef HAVE_USLEEP
  539. extern int usleep(unsigned) FAST_FUNC;
  540. #endif
  541. #ifndef HAVE_VASPRINTF
  542. extern int vasprintf(char **string_ptr, const char *format, va_list p) FAST_FUNC;
  543. #endif
  544. #ifndef HAVE_GETLINE
  545. # include <stdio.h> /* for FILE */
  546. # include <sys/types.h> /* size_t */
  547. extern ssize_t getline(char **lineptr, size_t *n, FILE *stream) FAST_FUNC;
  548. #endif
  549. #endif