blob: 9d357a0c6ade67a410eda5c14b49f541ea9f557b
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 | |
10 | |
11 | /* Convenience macros to test the version of gcc. */ |
12 | #undef __GNUC_PREREQ |
13 | #if defined __GNUC__ && defined __GNUC_MINOR__ |
14 | # define __GNUC_PREREQ(maj, min) \ |
15 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) |
16 | #else |
17 | # define __GNUC_PREREQ(maj, min) 0 |
18 | #endif |
19 | |
20 | /* __restrict is known in EGCS 1.2 and above. */ |
21 | #if !__GNUC_PREREQ(2,92) |
22 | # ifndef __restrict |
23 | # define __restrict |
24 | # endif |
25 | #endif |
26 | |
27 | #if !__GNUC_PREREQ(2,7) |
28 | # ifndef __attribute__ |
29 | # define __attribute__(x) |
30 | # endif |
31 | #endif |
32 | |
33 | #undef inline |
34 | #if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L |
35 | /* it's a keyword */ |
36 | #elif __GNUC_PREREQ(2,7) |
37 | # define inline __inline__ |
38 | #else |
39 | # define inline |
40 | #endif |
41 | |
42 | #ifndef __const |
43 | # define __const const |
44 | #endif |
45 | |
46 | #define UNUSED_PARAM __attribute__ ((__unused__)) |
47 | #define NORETURN __attribute__ ((__noreturn__)) |
48 | /* "The malloc attribute is used to tell the compiler that a function |
49 | * may be treated as if any non-NULL pointer it returns cannot alias |
50 | * any other pointer valid when the function returns. This will often |
51 | * improve optimization. Standard functions with this property include |
52 | * malloc and calloc. realloc-like functions have this property as long |
53 | * as the old pointer is never referred to (including comparing it |
54 | * to the new pointer) after the function returns a non-NULL value." |
55 | */ |
56 | #define RETURNS_MALLOC __attribute__ ((malloc)) |
57 | #define PACKED __attribute__ ((__packed__)) |
58 | #define ALIGNED(m) __attribute__ ((__aligned__(m))) |
59 | |
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 | |
79 | /* used by unit test machinery to run registration functions before calling main() */ |
80 | #define INIT_FUNC __attribute__ ((constructor)) |
81 | |
82 | /* -fwhole-program makes all symbols local. The attribute externally_visible |
83 | * forces a symbol global. */ |
84 | #if __GNUC_PREREQ(4,1) |
85 | # define EXTERNALLY_VISIBLE __attribute__(( visibility("default") )) |
86 | //__attribute__ ((__externally_visible__)) |
87 | #else |
88 | # define EXTERNALLY_VISIBLE |
89 | #endif |
90 | |
91 | /* At 4.4 gcc become much more anal about this, need to use "aliased" types */ |
92 | #if __GNUC_PREREQ(4,4) |
93 | # define FIX_ALIASING __attribute__((__may_alias__)) |
94 | #else |
95 | # define FIX_ALIASING |
96 | #endif |
97 | |
98 | /* We use __extension__ in some places to suppress -pedantic warnings |
99 | * about GCC extensions. This feature didn't work properly before |
100 | * gcc 2.8. */ |
101 | #if !__GNUC_PREREQ(2,8) |
102 | # ifndef __extension__ |
103 | # define __extension__ |
104 | # endif |
105 | #endif |
106 | |
107 | /* FAST_FUNC is a qualifier which (possibly) makes function call faster |
108 | * and/or smaller by using modified ABI. It is usually only needed |
109 | * on non-static, busybox internal functions. Recent versions of gcc |
110 | * optimize statics automatically. FAST_FUNC on static is required |
111 | * only if you need to match a function pointer's type */ |
112 | #if __GNUC_PREREQ(3,0) && defined(i386) /* || defined(__x86_64__)? */ |
113 | /* stdcall makes callee to pop arguments from stack, not caller */ |
114 | # define FAST_FUNC __attribute__((regparm(3),stdcall)) |
115 | /* #elif ... - add your favorite arch today! */ |
116 | #else |
117 | # define FAST_FUNC |
118 | #endif |
119 | |
120 | /* Make all declarations hidden (-fvisibility flag only affects definitions) */ |
121 | /* (don't include system headers after this until corresponding pop!) */ |
122 | #if __GNUC_PREREQ(4,1) && !defined(__CYGWIN__) |
123 | # define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN _Pragma("GCC visibility push(hidden)") |
124 | # define POP_SAVED_FUNCTION_VISIBILITY _Pragma("GCC visibility pop") |
125 | #else |
126 | # define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN |
127 | # define POP_SAVED_FUNCTION_VISIBILITY |
128 | #endif |
129 | |
130 | /* gcc-2.95 had no va_copy but only __va_copy. */ |
131 | #if !__GNUC_PREREQ(3,0) |
132 | # include <stdarg.h> |
133 | # if !defined va_copy && defined __va_copy |
134 | # define va_copy(d,s) __va_copy((d),(s)) |
135 | # endif |
136 | #endif |
137 | |
138 | |
139 | /* ---- Endian Detection ------------------------------------ */ |
140 | |
141 | #include <limits.h> |
142 | #if defined(__digital__) && defined(__unix__) |
143 | # include <sex.h> |
144 | #elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \ |
145 | || defined(__APPLE__) |
146 | # include <sys/resource.h> /* rlimit */ |
147 | # include <machine/endian.h> |
148 | # define bswap_64 __bswap64 |
149 | # define bswap_32 __bswap32 |
150 | # define bswap_16 __bswap16 |
151 | #else |
152 | # include <byteswap.h> |
153 | # include <endian.h> |
154 | #endif |
155 | |
156 | #if 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(BYTE_ORDER) && BYTE_ORDER == BIG_ENDIAN |
169 | # define BB_BIG_ENDIAN 1 |
170 | # define BB_LITTLE_ENDIAN 0 |
171 | #elif defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN |
172 | # define BB_BIG_ENDIAN 0 |
173 | # define BB_LITTLE_ENDIAN 1 |
174 | #elif defined(__386__) |
175 | # define BB_BIG_ENDIAN 0 |
176 | # define BB_LITTLE_ENDIAN 1 |
177 | #else |
178 | # error "Can't determine endianness" |
179 | #endif |
180 | |
181 | #if ULONG_MAX > 0xffffffff |
182 | # define bb_bswap_64(x) bswap_64(x) |
183 | #endif |
184 | |
185 | /* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */ |
186 | #if BB_BIG_ENDIAN |
187 | # define SWAP_BE16(x) (x) |
188 | # define SWAP_BE32(x) (x) |
189 | # define SWAP_BE64(x) (x) |
190 | # define SWAP_LE16(x) bswap_16(x) |
191 | # define SWAP_LE32(x) bswap_32(x) |
192 | # define SWAP_LE64(x) bb_bswap_64(x) |
193 | # define IF_BIG_ENDIAN(...) __VA_ARGS__ |
194 | # define IF_LITTLE_ENDIAN(...) |
195 | #else |
196 | # define SWAP_BE16(x) bswap_16(x) |
197 | # define SWAP_BE32(x) bswap_32(x) |
198 | # define SWAP_BE64(x) bb_bswap_64(x) |
199 | # define SWAP_LE16(x) (x) |
200 | # define SWAP_LE32(x) (x) |
201 | # define SWAP_LE64(x) (x) |
202 | # define IF_BIG_ENDIAN(...) |
203 | # define IF_LITTLE_ENDIAN(...) __VA_ARGS__ |
204 | #endif |
205 | |
206 | |
207 | /* ---- Unaligned access ------------------------------------ */ |
208 | |
209 | #include <stdint.h> |
210 | typedef int bb__aliased_int FIX_ALIASING; |
211 | typedef long bb__aliased_long FIX_ALIASING; |
212 | typedef uint16_t bb__aliased_uint16_t FIX_ALIASING; |
213 | typedef uint32_t bb__aliased_uint32_t FIX_ALIASING; |
214 | typedef uint64_t bb__aliased_uint64_t FIX_ALIASING; |
215 | |
216 | /* NB: unaligned parameter should be a pointer, aligned one - |
217 | * a lvalue. This makes it more likely to not swap them by mistake |
218 | */ |
219 | #if defined(i386) || defined(__x86_64__) || defined(__powerpc__) |
220 | # define BB_UNALIGNED_MEMACCESS_OK 1 |
221 | # define move_from_unaligned_int(v, intp) ((v) = *(bb__aliased_int*)(intp)) |
222 | # define move_from_unaligned_long(v, longp) ((v) = *(bb__aliased_long*)(longp)) |
223 | # define move_from_unaligned16(v, u16p) ((v) = *(bb__aliased_uint16_t*)(u16p)) |
224 | # define move_from_unaligned32(v, u32p) ((v) = *(bb__aliased_uint32_t*)(u32p)) |
225 | # define move_to_unaligned16(u16p, v) (*(bb__aliased_uint16_t*)(u16p) = (v)) |
226 | # define move_to_unaligned32(u32p, v) (*(bb__aliased_uint32_t*)(u32p) = (v)) |
227 | /* #elif ... - add your favorite arch today! */ |
228 | #else |
229 | # define BB_UNALIGNED_MEMACCESS_OK 0 |
230 | /* performs reasonably well (gcc usually inlines memcpy here) */ |
231 | # define move_from_unaligned_int(v, intp) (memcpy(&(v), (intp), sizeof(int))) |
232 | # define move_from_unaligned_long(v, longp) (memcpy(&(v), (longp), sizeof(long))) |
233 | # define move_from_unaligned16(v, u16p) (memcpy(&(v), (u16p), 2)) |
234 | # define move_from_unaligned32(v, u32p) (memcpy(&(v), (u32p), 4)) |
235 | # define move_to_unaligned16(u16p, v) do { \ |
236 | uint16_t __t = (v); \ |
237 | memcpy((u16p), &__t, 2); \ |
238 | } while (0) |
239 | # define move_to_unaligned32(u32p, v) do { \ |
240 | uint32_t __t = (v); \ |
241 | memcpy((u32p), &__t, 4); \ |
242 | } while (0) |
243 | #endif |
244 | |
245 | |
246 | /* ---- Size-saving "small" ints (arch-dependent) ----------- */ |
247 | |
248 | #if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__) |
249 | /* add other arches which benefit from this... */ |
250 | typedef signed char smallint; |
251 | typedef unsigned char smalluint; |
252 | #else |
253 | /* for arches where byte accesses generate larger code: */ |
254 | typedef int smallint; |
255 | typedef unsigned smalluint; |
256 | #endif |
257 | |
258 | /* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */ |
259 | #if (defined __digital__ && defined __unix__) |
260 | /* old system without (proper) C99 support */ |
261 | # define bool smalluint |
262 | #else |
263 | /* modern system, so use it */ |
264 | # include <stdbool.h> |
265 | #endif |
266 | |
267 | |
268 | /*----- Kernel versioning ------------------------------------*/ |
269 | |
270 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
271 | |
272 | #ifdef __UCLIBC__ |
273 | # define UCLIBC_VERSION KERNEL_VERSION(__UCLIBC_MAJOR__, __UCLIBC_MINOR__, __UCLIBC_SUBLEVEL__) |
274 | #else |
275 | # define UCLIBC_VERSION 0 |
276 | #endif |
277 | |
278 | |
279 | /* ---- Miscellaneous --------------------------------------- */ |
280 | |
281 | #if defined __GLIBC__ \ |
282 | || defined __UCLIBC__ \ |
283 | || defined __dietlibc__ \ |
284 | || defined __BIONIC__ \ |
285 | || defined _NEWLIB_VERSION |
286 | # include <features.h> |
287 | #endif |
288 | |
289 | /* Define bb_setpgrp */ |
290 | #if defined(__digital__) && defined(__unix__) |
291 | /* use legacy setpgrp(pid_t, pid_t) for now. move to platform.c */ |
292 | # define bb_setpgrp() do { pid_t __me = getpid(); setpgrp(__me, __me); } while (0) |
293 | #else |
294 | # define bb_setpgrp() setpgrp() |
295 | #endif |
296 | |
297 | /* fdprintf is more readable, we used it before dprintf was standardized */ |
298 | #include <unistd.h> |
299 | #define fdprintf dprintf |
300 | |
301 | /* Useful for defeating gcc's alignment of "char message[]"-like data */ |
302 | #if !defined(__s390__) |
303 | /* on s390[x], non-word-aligned data accesses require larger code */ |
304 | # define ALIGN1 __attribute__((aligned(1))) |
305 | # define ALIGN2 __attribute__((aligned(2))) |
306 | # define ALIGN4 __attribute__((aligned(4))) |
307 | #else |
308 | /* Arches which MUST have 2 or 4 byte alignment for everything are here */ |
309 | # define ALIGN1 |
310 | # define ALIGN2 |
311 | # define ALIGN4 |
312 | #endif |
313 | |
314 | /* |
315 | * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably. |
316 | * For earlier versions there is no reliable way to check if we are building |
317 | * for a mmu-less system. |
318 | */ |
319 | #if ENABLE_NOMMU || \ |
320 | (defined __UCLIBC__ && \ |
321 | UCLIBC_VERSION > KERNEL_VERSION(0, 9, 28) && \ |
322 | !defined __ARCH_USE_MMU__) |
323 | # define BB_MMU 0 |
324 | # define USE_FOR_NOMMU(...) __VA_ARGS__ |
325 | # define USE_FOR_MMU(...) |
326 | #else |
327 | # define BB_MMU 1 |
328 | # define USE_FOR_NOMMU(...) |
329 | # define USE_FOR_MMU(...) __VA_ARGS__ |
330 | #endif |
331 | |
332 | #if defined(__digital__) && defined(__unix__) |
333 | # include <standards.h> |
334 | # include <inttypes.h> |
335 | # define PRIu32 "u" |
336 | # if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET |
337 | # define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET) |
338 | # endif |
339 | # if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY |
340 | # define ADJ_FREQUENCY MOD_FREQUENCY |
341 | # endif |
342 | # if !defined ADJ_TIMECONST && defined MOD_TIMECONST |
343 | # define ADJ_TIMECONST MOD_TIMECONST |
344 | # endif |
345 | # if !defined ADJ_TICK && defined MOD_CLKB |
346 | # define ADJ_TICK MOD_CLKB |
347 | # endif |
348 | #endif |
349 | |
350 | #if defined(__CYGWIN__) |
351 | # define MAXSYMLINKS SYMLOOP_MAX |
352 | #endif |
353 | |
354 | #if defined(ANDROID) || defined(__ANDROID__) |
355 | # define BB_ADDITIONAL_PATH ":/system/sbin:/system/bin:/system/xbin" |
356 | # define SYS_ioprio_set __NR_ioprio_set |
357 | # define SYS_ioprio_get __NR_ioprio_get |
358 | #endif |
359 | |
360 | |
361 | /* ---- Who misses what? ------------------------------------ */ |
362 | |
363 | /* Assume all these functions and header files exist by default. |
364 | * Platforms where it is not true will #undef them below. |
365 | */ |
366 | #define HAVE_CLEARENV 1 |
367 | #define HAVE_FDATASYNC 1 |
368 | #define HAVE_DPRINTF 1 |
369 | #define HAVE_MEMRCHR 1 |
370 | #define HAVE_MKDTEMP 1 |
371 | #define HAVE_TTYNAME_R 1 |
372 | #define HAVE_PTSNAME_R 1 |
373 | #define HAVE_SETBIT 1 |
374 | #define HAVE_SIGHANDLER_T 1 |
375 | #define HAVE_STPCPY 1 |
376 | #define HAVE_MEMPCPY 1 |
377 | #define HAVE_STRCASESTR 1 |
378 | #define HAVE_STRCHRNUL 1 |
379 | #define HAVE_STRSEP 1 |
380 | #define HAVE_STRSIGNAL 1 |
381 | #define HAVE_STRVERSCMP 1 |
382 | #define HAVE_VASPRINTF 1 |
383 | #define HAVE_USLEEP 1 |
384 | #define HAVE_UNLOCKED_STDIO 1 |
385 | #define HAVE_UNLOCKED_LINE_OPS 1 |
386 | #define HAVE_GETLINE 1 |
387 | #define HAVE_XTABS 1 |
388 | #define HAVE_MNTENT_H 1 |
389 | #define HAVE_NET_ETHERNET_H 1 |
390 | #define HAVE_SYS_STATFS_H 1 |
391 | |
392 | #if defined(__UCLIBC__) |
393 | # if UCLIBC_VERSION < KERNEL_VERSION(0, 9, 32) |
394 | # undef HAVE_STRVERSCMP |
395 | # endif |
396 | # if UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 30) |
397 | # ifndef __UCLIBC_SUSV3_LEGACY__ |
398 | # undef HAVE_USLEEP |
399 | # endif |
400 | # endif |
401 | #endif |
402 | |
403 | #if defined(__WATCOMC__) |
404 | # undef HAVE_DPRINTF |
405 | # undef HAVE_GETLINE |
406 | # undef HAVE_MEMRCHR |
407 | # undef HAVE_MKDTEMP |
408 | # undef HAVE_SETBIT |
409 | # undef HAVE_STPCPY |
410 | # undef HAVE_STRCASESTR |
411 | # undef HAVE_STRCHRNUL |
412 | # undef HAVE_STRSEP |
413 | # undef HAVE_STRSIGNAL |
414 | # undef HAVE_STRVERSCMP |
415 | # undef HAVE_VASPRINTF |
416 | # undef HAVE_UNLOCKED_STDIO |
417 | # undef HAVE_UNLOCKED_LINE_OPS |
418 | # undef HAVE_NET_ETHERNET_H |
419 | #endif |
420 | |
421 | #if defined(__CYGWIN__) |
422 | # undef HAVE_CLEARENV |
423 | # undef HAVE_FDPRINTF |
424 | # undef HAVE_MEMRCHR |
425 | # undef HAVE_PTSNAME_R |
426 | # undef HAVE_STRVERSCMP |
427 | # undef HAVE_UNLOCKED_LINE_OPS |
428 | #endif |
429 | |
430 | /* These BSD-derived OSes share many similarities */ |
431 | #if (defined __digital__ && defined __unix__) \ |
432 | || defined __APPLE__ \ |
433 | || defined __OpenBSD__ || defined __NetBSD__ |
434 | # undef HAVE_CLEARENV |
435 | # undef HAVE_FDATASYNC |
436 | # undef HAVE_GETLINE |
437 | # undef HAVE_MNTENT_H |
438 | # undef HAVE_PTSNAME_R |
439 | # undef HAVE_SYS_STATFS_H |
440 | # undef HAVE_SIGHANDLER_T |
441 | # undef HAVE_STRVERSCMP |
442 | # undef HAVE_XTABS |
443 | # undef HAVE_DPRINTF |
444 | # undef HAVE_UNLOCKED_STDIO |
445 | # undef HAVE_UNLOCKED_LINE_OPS |
446 | #endif |
447 | |
448 | #if defined(__dietlibc__) |
449 | # undef HAVE_STRCHRNUL |
450 | #endif |
451 | |
452 | #if defined(__APPLE__) |
453 | # undef HAVE_STRCHRNUL |
454 | #endif |
455 | |
456 | #if defined(__FreeBSD__) |
457 | /* users say mempcpy is not present in FreeBSD 9.x */ |
458 | # undef HAVE_MEMPCPY |
459 | # undef HAVE_CLEARENV |
460 | # undef HAVE_FDATASYNC |
461 | # undef HAVE_MNTENT_H |
462 | # undef HAVE_PTSNAME_R |
463 | # undef HAVE_SYS_STATFS_H |
464 | # undef HAVE_SIGHANDLER_T |
465 | # undef HAVE_STRVERSCMP |
466 | # undef HAVE_XTABS |
467 | # undef HAVE_UNLOCKED_LINE_OPS |
468 | # include <osreldate.h> |
469 | # if __FreeBSD_version < 1000029 |
470 | # undef HAVE_STRCHRNUL /* FreeBSD added strchrnul() between 1000028 and 1000029 */ |
471 | # endif |
472 | #endif |
473 | |
474 | #if defined(__NetBSD__) |
475 | # define HAVE_GETLINE 1 /* Recent NetBSD versions have getline() */ |
476 | #endif |
477 | |
478 | #if defined(__digital__) && defined(__unix__) |
479 | # undef HAVE_STPCPY |
480 | #endif |
481 | |
482 | #if defined(ANDROID) || defined(__ANDROID__) |
483 | # if __ANDROID_API__ < 8 |
484 | /* ANDROID < 8 has no [f]dprintf at all */ |
485 | # undef HAVE_DPRINTF |
486 | # elif __ANDROID_API__ < 21 |
487 | /* ANDROID < 21 has fdprintf */ |
488 | # define dprintf fdprintf |
489 | # else |
490 | /* ANDROID >= 21 has standard dprintf */ |
491 | # endif |
492 | # if __ANDROID_API__ < 21 |
493 | # undef HAVE_TTYNAME_R |
494 | # undef HAVE_GETLINE |
495 | # undef HAVE_STPCPY |
496 | # endif |
497 | # undef HAVE_MEMPCPY |
498 | # undef HAVE_STRCHRNUL |
499 | # undef HAVE_STRVERSCMP |
500 | # undef HAVE_UNLOCKED_LINE_OPS |
501 | # undef HAVE_NET_ETHERNET_H |
502 | #endif |
503 | |
504 | /* |
505 | * Now, define prototypes for all the functions defined in platform.c |
506 | * These must come after all the HAVE_* macros are defined (or not) |
507 | */ |
508 | |
509 | #ifndef HAVE_DPRINTF |
510 | extern int dprintf(int fd, const char *format, ...); |
511 | #endif |
512 | |
513 | #ifndef HAVE_MEMRCHR |
514 | extern void *memrchr(const void *s, int c, size_t n) FAST_FUNC; |
515 | #endif |
516 | |
517 | #ifndef HAVE_MKDTEMP |
518 | extern char *mkdtemp(char *template) FAST_FUNC; |
519 | #endif |
520 | |
521 | #ifndef HAVE_TTYNAME_R |
522 | #define ttyname_r bb_ttyname_r |
523 | extern int ttyname_r(int fd, char *buf, size_t buflen); |
524 | #endif |
525 | |
526 | #ifndef HAVE_SETBIT |
527 | # define setbit(a, b) ((a)[(b) >> 3] |= 1 << ((b) & 7)) |
528 | # define clrbit(a, b) ((a)[(b) >> 3] &= ~(1 << ((b) & 7))) |
529 | #endif |
530 | |
531 | #ifndef HAVE_SIGHANDLER_T |
532 | typedef void (*sighandler_t)(int); |
533 | #endif |
534 | |
535 | #ifndef HAVE_STPCPY |
536 | extern char *stpcpy(char *p, const char *to_add) FAST_FUNC; |
537 | #endif |
538 | |
539 | #ifndef HAVE_MEMPCPY |
540 | #include <string.h> |
541 | /* In case we are wrong about !HAVE_MEMPCPY, and toolchain _does_ have |
542 | * mempcpy(), avoid colliding with it: |
543 | */ |
544 | #define mempcpy bb__mempcpy |
545 | static ALWAYS_INLINE void *mempcpy(void *dest, const void *src, size_t len) |
546 | { |
547 | return (char*)((uintptr_t)memcpy(dest, src, len) + len); |
548 | } |
549 | #endif |
550 | |
551 | #ifndef HAVE_STRCASESTR |
552 | extern char *strcasestr(const char *s, const char *pattern) FAST_FUNC; |
553 | #endif |
554 | |
555 | #ifndef HAVE_STRCHRNUL |
556 | extern char *strchrnul(const char *s, int c) FAST_FUNC; |
557 | #endif |
558 | |
559 | #ifndef HAVE_STRSEP |
560 | extern char *strsep(char **stringp, const char *delim) FAST_FUNC; |
561 | #endif |
562 | |
563 | #ifndef HAVE_STRSIGNAL |
564 | /* Not exactly the same: instead of "Stopped" it shows "STOP" etc */ |
565 | # define strsignal(sig) get_signame(sig) |
566 | #endif |
567 | |
568 | #ifndef HAVE_USLEEP |
569 | extern int usleep(unsigned) FAST_FUNC; |
570 | #endif |
571 | |
572 | #ifndef HAVE_VASPRINTF |
573 | extern int vasprintf(char **string_ptr, const char *format, va_list p) FAST_FUNC; |
574 | #endif |
575 | |
576 | #ifndef HAVE_GETLINE |
577 | # include <stdio.h> /* for FILE */ |
578 | # include <sys/types.h> /* size_t */ |
579 | extern ssize_t getline(char **lineptr, size_t *n, FILE *stream) FAST_FUNC; |
580 | #endif |
581 | |
582 | #endif |
583 |