1 /* Copyright (C) 1991-2007, 2009 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <http://www.gnu.org/licenses/>. */ 17 18 /* 19 * ISO C99 Standard: 7.20 General utilities <stdlib.h> 20 */ 21 22 #ifndef _STDLIB_H 23 24 #include <features.h> 25 26 /* Get size_t, wchar_t and NULL from <stddef.h>. */ 27 #define __need_size_t 28 #ifndef __need_malloc_and_calloc 29 # ifdef __UCLIBC_HAS_WCHAR__ 30 # define __need_wchar_t 31 # endif 32 # define __need_NULL 33 #endif 34 #include <stddef.h> 35 36 __BEGIN_DECLS 37 38 #ifndef __need_malloc_and_calloc 39 #define _STDLIB_H 1 40 41 #if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H 42 /* XPG requires a few symbols from <sys/wait.h> being defined. */ 43 # include <bits/waitflags.h> 44 # include <bits/waitstatus.h> 45 46 # ifdef __USE_BSD 47 48 /* Lots of hair to allow traditional BSD use of `union wait' 49 as well as POSIX.1 use of `int' for the status word. */ 50 51 # if defined __GNUC__ && !defined __cplusplus 52 # define __WAIT_INT(status) \ 53 (__extension__ (((union { __typeof(status) __in; int __i; }) \ 54 { .__in = (status) }).__i)) 55 # else 56 # define __WAIT_INT(status) (*(int *) &(status)) 57 # endif 58 59 /* This is the type of the argument to `wait'. The funky union 60 causes redeclarations with either `int *' or `union wait *' to be 61 allowed without complaint. __WAIT_STATUS_DEFN is the type used in 62 the actual function definitions. */ 63 64 # if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus 65 # define __WAIT_STATUS void * 66 # define __WAIT_STATUS_DEFN void * 67 # else 68 /* This works in GCC 2.6.1 and later. */ 69 typedef union 70 { 71 union wait *__uptr; 72 int *__iptr; 73 } __WAIT_STATUS __attribute__ ((__transparent_union__)); 74 # define __WAIT_STATUS_DEFN int * 75 # endif 76 77 # else /* Don't use BSD. */ 78 79 # define __WAIT_INT(status) (status) 80 # define __WAIT_STATUS int * 81 # define __WAIT_STATUS_DEFN int * 82 83 # endif /* Use BSD. */ 84 85 /* Define the macros <sys/wait.h> also would define this way. */ 86 # define WEXITSTATUS(status) __WEXITSTATUS (__WAIT_INT (status)) 87 # define WTERMSIG(status) __WTERMSIG (__WAIT_INT (status)) 88 # define WSTOPSIG(status) __WSTOPSIG (__WAIT_INT (status)) 89 # define WIFEXITED(status) __WIFEXITED (__WAIT_INT (status)) 90 # define WIFSIGNALED(status) __WIFSIGNALED (__WAIT_INT (status)) 91 # define WIFSTOPPED(status) __WIFSTOPPED (__WAIT_INT (status)) 92 # ifdef __WIFCONTINUED 93 # define WIFCONTINUED(status) __WIFCONTINUED (__WAIT_INT (status)) 94 # endif 95 #endif /* X/Open and <sys/wait.h> not included. */ 96 97 __BEGIN_NAMESPACE_STD 98 /* Returned by `div'. */ 99 typedef struct 100 { 101 int quot; /* Quotient. */ 102 int rem; /* Remainder. */ 103 } div_t; 104 105 /* Returned by `ldiv'. */ 106 #ifndef __ldiv_t_defined 107 typedef struct 108 { 109 long int quot; /* Quotient. */ 110 long int rem; /* Remainder. */ 111 } ldiv_t; 112 # define __ldiv_t_defined 1 113 #endif 114 __END_NAMESPACE_STD 115 116 #if defined __USE_ISOC99 && !defined __lldiv_t_defined 117 __BEGIN_NAMESPACE_C99 118 /* Returned by `lldiv'. */ 119 __extension__ typedef struct 120 { 121 long long int quot; /* Quotient. */ 122 long long int rem; /* Remainder. */ 123 } lldiv_t; 124 # define __lldiv_t_defined 1 125 __END_NAMESPACE_C99 126 #endif 127 128 129 /* The largest number rand will return (same as INT_MAX). */ 130 #define RAND_MAX 2147483647 131 132 133 /* We define these the same for all machines. 134 Changes from this to the outside world should be done in `_exit'. */ 135 #define EXIT_FAILURE 1 /* Failing exit status. */ 136 #define EXIT_SUCCESS 0 /* Successful exit status. */ 137 138 139 /* Maximum length of a multibyte character in the current locale. */ 140 #if 0 141 #define MB_CUR_MAX (__ctype_get_mb_cur_max ()) 142 extern size_t __ctype_get_mb_cur_max (void) __THROW __wur; 143 #else 144 #ifdef __UCLIBC_HAS_WCHAR__ 145 # define MB_CUR_MAX (_stdlib_mb_cur_max ()) 146 extern size_t _stdlib_mb_cur_max (void) __THROW __wur; 147 libc_hidden_proto(_stdlib_mb_cur_max) 148 #else 149 # define MB_CUR_MAX 1 150 #endif 151 #endif 152 153 154 __BEGIN_NAMESPACE_STD 155 #ifdef __UCLIBC_HAS_FLOATS__ 156 /* Convert a string to a floating-point number. */ 157 extern double atof (const char *__nptr) 158 __THROW __attribute_pure__ __nonnull ((1)) __wur; 159 #endif /* __UCLIBC_HAS_FLOATS__ */ 160 /* Convert a string to an integer. */ 161 extern int atoi (const char *__nptr) 162 __THROW __attribute_pure__ __nonnull ((1)) __wur; 163 libc_hidden_proto(atoi) 164 /* Convert a string to a long integer. */ 165 extern long int atol (const char *__nptr) 166 __THROW __attribute_pure__ __nonnull ((1)) __wur; 167 __END_NAMESPACE_STD 168 169 #if defined __USE_ISOC99 || defined __USE_MISC 170 __BEGIN_NAMESPACE_C99 171 /* Convert a string to a long long integer. */ 172 __extension__ extern long long int atoll (const char *__nptr) 173 __THROW __attribute_pure__ __nonnull ((1)) __wur; 174 __END_NAMESPACE_C99 175 #endif 176 177 #ifdef __UCLIBC_HAS_FLOATS__ 178 __BEGIN_NAMESPACE_STD 179 /* Convert a string to a floating-point number. */ 180 extern double strtod (const char *__restrict __nptr, 181 char **__restrict __endptr) 182 __THROW __nonnull ((1)) __wur; 183 libc_hidden_proto(strtod) 184 __END_NAMESPACE_STD 185 186 #ifdef __USE_ISOC99 187 __BEGIN_NAMESPACE_C99 188 /* Likewise for `float' and `long double' sizes of floating-point numbers. */ 189 extern float strtof (const char *__restrict __nptr, 190 char **__restrict __endptr) __THROW __nonnull ((1)) __wur; 191 192 extern long double strtold (const char *__restrict __nptr, 193 char **__restrict __endptr) 194 __THROW __nonnull ((1)) __wur; 195 __END_NAMESPACE_C99 196 #endif 197 #endif /* __UCLIBC_HAS_FLOATS__ */ 198 199 __BEGIN_NAMESPACE_STD 200 /* Convert a string to a long integer. */ 201 extern long int strtol (const char *__restrict __nptr, 202 char **__restrict __endptr, int __base) 203 __THROW __nonnull ((1)) __wur; 204 libc_hidden_proto(strtol) 205 /* Convert a string to an unsigned long integer. */ 206 extern unsigned long int strtoul (const char *__restrict __nptr, 207 char **__restrict __endptr, int __base) 208 __THROW __nonnull ((1)) __wur; 209 libc_hidden_proto(strtoul) 210 __END_NAMESPACE_STD 211 212 #ifdef __USE_BSD 213 #include <sys/types.h> /* for u_quad_t */ 214 215 /* Convert a string to a quadword integer. */ 216 __extension__ 217 extern quad_t strtoq (const char *__restrict __nptr, 218 char **__restrict __endptr, int __base) 219 __THROW __nonnull ((1)) __wur; 220 /* Convert a string to an unsigned quadword integer. */ 221 __extension__ 222 extern u_quad_t strtouq (const char *__restrict __nptr, 223 char **__restrict __endptr, int __base) 224 __THROW __nonnull ((1)) __wur; 225 #endif /* GCC and use BSD. */ 226 227 #if defined __USE_ISOC99 || defined __USE_MISC 228 __BEGIN_NAMESPACE_C99 229 /* Convert a string to a quadword integer. */ 230 __extension__ 231 extern long long int strtoll (const char *__restrict __nptr, 232 char **__restrict __endptr, int __base) 233 __THROW __nonnull ((1)) __wur; 234 libc_hidden_proto(strtoll) 235 /* Convert a string to an unsigned quadword integer. */ 236 __extension__ 237 extern unsigned long long int strtoull (const char *__restrict __nptr, 238 char **__restrict __endptr, int __base) 239 __THROW __nonnull ((1)) __wur; 240 __END_NAMESPACE_C99 241 #endif /* ISO C99 or GCC and use MISC. */ 242 243 244 #if defined __USE_GNU && defined __UCLIBC_HAS_XLOCALE__ 245 /* The concept of one static locale per category is not very well 246 thought out. Many applications will need to process its data using 247 information from several different locales. Another problem is 248 the implementation of the internationalization handling in the 249 ISO C++ standard library. To support this another set of 250 the functions using locale data exist which take an additional 251 argument. 252 253 Attention: even though several *_l interfaces are part of POSIX:2008, 254 these are not. */ 255 256 /* Structure for reentrant locale using functions. This is an 257 (almost) opaque type for the user level programs. */ 258 # include <xlocale.h> 259 260 /* Special versions of the functions above which take the locale to 261 use as an additional parameter. */ 262 extern long int strtol_l (const char *__restrict __nptr, 263 char **__restrict __endptr, int __base, 264 __locale_t __loc) __THROW __nonnull ((1, 4)) __wur; 265 libc_hidden_proto(strtol_l) 266 267 extern unsigned long int strtoul_l (const char *__restrict __nptr, 268 char **__restrict __endptr, 269 int __base, __locale_t __loc) 270 __THROW __nonnull ((1, 4)) __wur; 271 libc_hidden_proto(strtoul_l) 272 273 __extension__ 274 extern long long int strtoll_l (const char *__restrict __nptr, 275 char **__restrict __endptr, int __base, 276 __locale_t __loc) 277 __THROW __nonnull ((1, 4)) __wur; 278 279 __extension__ 280 extern unsigned long long int strtoull_l (const char *__restrict __nptr, 281 char **__restrict __endptr, 282 int __base, __locale_t __loc) 283 __THROW __nonnull ((1, 4)) __wur; 284 285 #ifdef __UCLIBC_HAS_FLOATS__ 286 extern double strtod_l (const char *__restrict __nptr, 287 char **__restrict __endptr, __locale_t __loc) 288 __THROW __nonnull ((1, 3)) __wur; 289 290 extern float strtof_l (const char *__restrict __nptr, 291 char **__restrict __endptr, __locale_t __loc) 292 __THROW __nonnull ((1, 3)) __wur; 293 294 extern long double strtold_l (const char *__restrict __nptr, 295 char **__restrict __endptr, 296 __locale_t __loc) 297 __THROW __nonnull ((1, 3)) __wur; 298 #endif /* __UCLIBC_HAS_FLOATS__ */ 299 #endif /* GNU */ 300 301 302 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED 303 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant 304 digit first. Returns a pointer to static storage overwritten by the 305 next call. */ 306 extern char *l64a (long int __n) __THROW __wur; 307 308 /* Read a number from a string S in base 64 as above. */ 309 extern long int a64l (const char *__s) 310 __THROW __attribute_pure__ __nonnull ((1)) __wur; 311 312 #endif /* Use SVID || extended X/Open. */ 313 314 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD 315 # include <sys/types.h> /* we need int32_t... */ 316 317 /* These are the functions that actually do things. The `random', `srandom', 318 `initstate' and `setstate' functions are those from BSD Unices. 319 The `rand' and `srand' functions are required by the ANSI standard. 320 We provide both interfaces to the same random number generator. */ 321 /* Return a random long integer between 0 and RAND_MAX inclusive. */ 322 extern long int random (void) __THROW; 323 libc_hidden_proto(random) 324 325 /* Seed the random number generator with the given number. */ 326 extern void srandom (unsigned int __seed) __THROW; 327 328 /* Initialize the random number generator to use state buffer STATEBUF, 329 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16, 330 32, 64, 128 and 256, the bigger the better; values less than 8 will 331 cause an error and values greater than 256 will be rounded down. */ 332 extern char *initstate (unsigned int __seed, char *__statebuf, 333 size_t __statelen) __THROW __nonnull ((2)); 334 335 /* Switch the random number generator to state buffer STATEBUF, 336 which should have been previously initialized by `initstate'. */ 337 extern char *setstate (char *__statebuf) __THROW __nonnull ((1)); 338 339 340 # ifdef __USE_MISC 341 /* Reentrant versions of the `random' family of functions. 342 These functions all use the following data structure to contain 343 state, rather than global state variables. */ 344 345 struct random_data 346 { 347 int32_t *fptr; /* Front pointer. */ 348 int32_t *rptr; /* Rear pointer. */ 349 int32_t *state; /* Array of state values. */ 350 #if 0 351 int rand_type; /* Type of random number generator. */ 352 int rand_deg; /* Degree of random number generator. */ 353 int rand_sep; /* Distance between front and rear. */ 354 #else 355 /* random_r.c, TYPE_x, DEG_x, SEP_x - small enough for int8_t */ 356 int8_t rand_type; /* Type of random number generator. */ 357 int8_t rand_deg; /* Degree of random number generator. */ 358 int8_t rand_sep; /* Distance between front and rear. */ 359 #endif 360 int32_t *end_ptr; /* Pointer behind state table. */ 361 }; 362 363 extern int random_r (struct random_data *__restrict __buf, 364 int32_t *__restrict __result) __THROW __nonnull ((1, 2)); 365 libc_hidden_proto(random_r) 366 367 extern int srandom_r (unsigned int __seed, struct random_data *__buf) 368 __THROW __nonnull ((2)); 369 libc_hidden_proto(srandom_r) 370 371 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf, 372 size_t __statelen, 373 struct random_data *__restrict __buf) 374 __THROW __nonnull ((2, 4)); 375 libc_hidden_proto(initstate_r) 376 377 extern int setstate_r (char *__restrict __statebuf, 378 struct random_data *__restrict __buf) 379 __THROW __nonnull ((1, 2)); 380 libc_hidden_proto(setstate_r) 381 # endif /* Use misc. */ 382 #endif /* Use SVID || extended X/Open || BSD. */ 383 384 385 __BEGIN_NAMESPACE_STD 386 /* Return a random integer between 0 and RAND_MAX inclusive. */ 387 extern int rand (void) __THROW; 388 /* Seed the random number generator with the given number. */ 389 extern void srand (unsigned int __seed) __THROW; 390 __END_NAMESPACE_STD 391 392 #ifdef __USE_POSIX 393 /* Reentrant interface according to POSIX.1. */ 394 extern int rand_r (unsigned int *__seed) __THROW; 395 #endif 396 397 398 #if defined __USE_SVID || defined __USE_XOPEN 399 /* System V style 48-bit random number generator functions. */ 400 401 #ifdef __UCLIBC_HAS_FLOATS__ 402 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */ 403 extern double drand48 (void) __THROW; 404 extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1)); 405 #endif /* __UCLIBC_HAS_FLOATS__ */ 406 407 /* Return non-negative, long integer in [0,2^31). */ 408 extern long int lrand48 (void) __THROW; 409 extern long int nrand48 (unsigned short int __xsubi[3]) 410 __THROW __nonnull ((1)); 411 412 /* Return signed, long integers in [-2^31,2^31). */ 413 extern long int mrand48 (void) __THROW; 414 extern long int jrand48 (unsigned short int __xsubi[3]) 415 __THROW __nonnull ((1)); 416 417 /* Seed random number generator. */ 418 extern void srand48 (long int __seedval) __THROW; 419 extern unsigned short int *seed48 (unsigned short int __seed16v[3]) 420 __THROW __nonnull ((1)); 421 extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1)); 422 423 # ifdef __USE_MISC 424 /* Data structure for communication with thread safe versions. This 425 type is to be regarded as opaque. It's only exported because users 426 have to allocate objects of this type. */ 427 struct drand48_data 428 { 429 unsigned short int __x[3]; /* Current state. */ 430 unsigned short int __old_x[3]; /* Old state. */ 431 unsigned short int __c; /* Additive const. in congruential formula. */ 432 unsigned short int __init; /* Flag for initializing. */ 433 unsigned long long int __a; /* Factor in congruential formula. */ 434 }; 435 436 #ifdef __UCLIBC_HAS_FLOATS__ 437 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */ 438 extern int drand48_r (struct drand48_data *__restrict __buffer, 439 double *__restrict __result) __THROW __nonnull ((1, 2)); 440 extern int erand48_r (unsigned short int __xsubi[3], 441 struct drand48_data *__restrict __buffer, 442 double *__restrict __result) __THROW __nonnull ((1, 2)); 443 libc_hidden_proto(erand48_r) 444 #endif /* __UCLIBC_HAS_FLOATS__ */ 445 446 /* Return non-negative, long integer in [0,2^31). */ 447 extern int lrand48_r (struct drand48_data *__restrict __buffer, 448 long int *__restrict __result) 449 __THROW __nonnull ((1, 2)); 450 libc_hidden_proto(lrand48_r) 451 extern int nrand48_r (unsigned short int __xsubi[3], 452 struct drand48_data *__restrict __buffer, 453 long int *__restrict __result) 454 __THROW __nonnull ((1, 2)); 455 libc_hidden_proto(nrand48_r) 456 457 /* Return signed, long integers in [-2^31,2^31). */ 458 extern int mrand48_r (struct drand48_data *__restrict __buffer, 459 long int *__restrict __result) 460 __THROW __nonnull ((1, 2)); 461 extern int jrand48_r (unsigned short int __xsubi[3], 462 struct drand48_data *__restrict __buffer, 463 long int *__restrict __result) 464 __THROW __nonnull ((1, 2)); 465 libc_hidden_proto(jrand48_r) 466 467 /* Seed random number generator. */ 468 extern int srand48_r (long int __seedval, struct drand48_data *__buffer) 469 __THROW __nonnull ((2)); 470 libc_hidden_proto(srand48_r) 471 472 extern int seed48_r (unsigned short int __seed16v[3], 473 struct drand48_data *__buffer) __THROW __nonnull ((1, 2)); 474 libc_hidden_proto(seed48_r) 475 476 extern int lcong48_r (unsigned short int __param[7], 477 struct drand48_data *__buffer) 478 __THROW __nonnull ((1, 2)); 479 # endif /* Use misc. */ 480 #endif /* Use SVID or X/Open. */ 481 482 #endif /* don't just need malloc and calloc */ 483 484 #ifndef __malloc_and_calloc_defined 485 # define __malloc_and_calloc_defined 486 __BEGIN_NAMESPACE_STD 487 /* Allocate SIZE bytes of memory. */ 488 extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur; 489 /* We want the malloc symbol overridable at runtime, do not hide it! */ 490 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */ 491 extern void *calloc (size_t __nmemb, size_t __size) 492 __THROW __attribute_malloc__ __wur; 493 /* We want the calloc symbol overridable at runtime, do not hide it! */ 494 __END_NAMESPACE_STD 495 #endif 496 497 #ifndef __need_malloc_and_calloc 498 __BEGIN_NAMESPACE_STD 499 /* Re-allocate the previously allocated block 500 in PTR, making the new block SIZE bytes long. */ 501 /* __attribute_malloc__ is not used, because if realloc returns 502 the same pointer that was passed to it, aliasing needs to be allowed 503 between objects pointed by the old and new pointers. */ 504 extern void *realloc (void *__ptr, size_t __size) 505 __THROW __wur; 506 /* We want the realloc symbol overridable at runtime, do not hide it! */ 507 /* Free a block allocated by `malloc', `realloc' or `calloc'. */ 508 extern void free (void *__ptr) __THROW; 509 /* We want the free symbol overridable at runtime, do not hide it! */ 510 __END_NAMESPACE_STD 511 512 #if 0 /*def __USE_MISC*/ 513 /* Free a block. An alias for `free'. (Sun Unices). */ 514 extern void cfree (void *__ptr) __THROW; 515 #endif /* Use misc. */ 516 517 #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC 518 # include <alloca.h> 519 #endif /* Use GNU, BSD, or misc. */ 520 521 #ifdef __UCLIBC_SUSV2_LEGACY__ 522 # if defined __USE_BSD || defined __USE_XOPEN_EXTENDED 523 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */ 524 extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur; 525 # endif 526 #endif 527 528 #if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__ 529 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */ 530 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size) 531 __THROW __nonnull ((1)) __wur; 532 #endif 533 534 #ifdef __USE_ISOC11 535 /* ISO C variant of aligned allocation. */ 536 extern void *aligned_alloc (size_t __alignment, size_t __size) 537 __THROW __attribute_malloc__ __attribute_alloc_size__ ((2)) __wur; 538 #endif 539 540 __BEGIN_NAMESPACE_STD 541 /* Abort execution and generate a core-dump. */ 542 extern void abort (void) __THROW __attribute__ ((__noreturn__)); 543 libc_hidden_proto(abort) 544 545 546 /* Register a function to be called when `exit' is called. */ 547 extern int atexit (void (*__func) (void)) __THROW __nonnull ((1)); 548 __END_NAMESPACE_STD 549 550 #ifdef __USE_MISC 551 /* Register a function to be called with the status 552 given to `exit' and the given argument. */ 553 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg) 554 __THROW __nonnull ((1)); 555 #endif 556 557 __BEGIN_NAMESPACE_STD 558 /* Call all functions registered with `atexit' and `on_exit', 559 in the reverse of the order in which they were registered, 560 perform stdio cleanup, and terminate program execution with STATUS. */ 561 extern void exit (int __status) __THROW __attribute__ ((__noreturn__)); 562 libc_hidden_proto(exit) 563 __END_NAMESPACE_STD 564 565 #ifdef __USE_ISOC99 566 __BEGIN_NAMESPACE_C99 567 /* Terminate the program with STATUS without calling any of the 568 functions registered with `atexit' or `on_exit'. */ 569 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__)); 570 __END_NAMESPACE_C99 571 #endif 572 573 574 __BEGIN_NAMESPACE_STD 575 /* Return the value of envariable NAME, or NULL if it doesn't exist. */ 576 extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur; 577 libc_hidden_proto(getenv) 578 __END_NAMESPACE_STD 579 580 /* This function is similar to the above but returns NULL if the 581 programs is running with SUID or SGID enabled. */ 582 extern char *secure_getenv (const char *__name) 583 __THROW __nonnull ((1)) __wur; 584 585 #if defined __USE_SVID || defined __USE_XOPEN 586 /* The SVID says this is in <stdio.h>, but this seems a better place. */ 587 /* Put STRING, which is of the form "NAME=VALUE", in the environment. 588 If there is no `=', remove NAME from the environment. */ 589 extern int putenv (char *__string) __THROW __nonnull ((1)); 590 #endif 591 592 #if defined __USE_BSD || defined __USE_XOPEN2K 593 /* Set NAME to VALUE in the environment. 594 If REPLACE is nonzero, overwrite an existing value. */ 595 extern int setenv (const char *__name, const char *__value, int __replace) 596 __THROW __nonnull ((2)); 597 libc_hidden_proto(setenv) 598 599 /* Remove the variable NAME from the environment. */ 600 extern int unsetenv (const char *__name) __THROW; 601 libc_hidden_proto(unsetenv) 602 #endif 603 604 /* The following is used by uClibc in atexit.c and sysconf.c */ 605 /* We have no limit when __UCLIBC_DYNAMIC_ATEXIT__ is enabled. */ 606 #ifdef __UCLIBC_DYNAMIC_ATEXIT__ 607 # define __UCLIBC_MAX_ATEXIT INT_MAX 608 #else 609 # define __UCLIBC_MAX_ATEXIT 32 610 #endif 611 612 613 #ifdef __USE_MISC 614 /* The `clearenv' was planned to be added to POSIX.1 but probably 615 never made it. Nevertheless the POSIX.9 standard (POSIX bindings 616 for Fortran 77) requires this function. */ 617 extern int clearenv (void) __THROW; 618 #endif 619 620 621 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED 622 # if defined __UCLIBC_SUSV3_LEGACY__ 623 /* Generate a unique temporary file name from TEMPLATE. 624 The last six characters of TEMPLATE must be "XXXXXX"; 625 they are replaced with a string that makes the file name unique. 626 Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */ 627 extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur; 628 # endif 629 630 /* Generate a unique temporary file name from TEMPLATE. 631 The last six characters of TEMPLATE must be "XXXXXX"; 632 they are replaced with a string that makes the filename unique. 633 Returns a file descriptor open on the file for reading and writing, 634 or -1 if it cannot create a uniquely-named file. 635 636 This function is a possible cancellation point and therefore not 637 marked with __THROW. */ 638 # ifndef __USE_FILE_OFFSET64 639 extern int mkstemp (char *__template) __nonnull ((1)) __wur; 640 # else 641 # ifdef __REDIRECT 642 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64) 643 __nonnull ((1)) __wur; 644 # else 645 # define mkstemp mkstemp64 646 # endif 647 # endif 648 # ifdef __USE_LARGEFILE64 649 extern int mkstemp64 (char *__template) __nonnull ((1)) __wur; 650 # endif 651 #endif 652 653 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED 654 # if defined __UCLIBC_SUSV3_LEGACY__ 655 extern char *mktemps (char *__template, int __suffixlen) __THROW __nonnull ((1)) __wur; 656 # endif 657 658 /* The mkstemps() function is like mkstemp(), except that the string in 659 template contains a suffix of suffixlen characters. Thus, template is 660 of the form prefixXXXXXXsuffix, and the string XXXXXX is modified as 661 for mkstemp(). 662 Returns a file descriptor open on the file for reading and writing, 663 or -1 if it cannot create a uniquely-named file. 664 665 This function is a possible cancellation point and therefore not 666 marked with __THROW. */ 667 # ifndef __USE_FILE_OFFSET64 668 extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur; 669 # else 670 # ifdef __REDIRECT 671 extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen), mkstemps64) 672 __nonnull ((1)) __wur; 673 # else 674 # define mkstemps mkstemps64 675 # endif 676 # endif 677 # ifdef __USE_LARGEFILE64 678 extern int mkstemps64 (char *__template, int __suffixlen) __nonnull ((1)) __wur; 679 # endif 680 #endif 681 682 #if defined __USE_BSD || defined __USE_XOPEN2K8 683 /* Create a unique temporary directory from TEMPLATE. 684 The last six characters of TEMPLATE must be "XXXXXX"; 685 they are replaced with a string that makes the directory name unique. 686 Returns TEMPLATE, or a null pointer if it cannot get a unique name. 687 The directory is created mode 700. */ 688 extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur; 689 #endif 690 691 #ifdef __USE_GNU 692 /* Generate a unique temporary file name from TEMPLATE similar to 693 mkstemp. But allow the caller to pass additional flags which are 694 used in the open call to create the file.. 695 696 This function is a possible cancellation point and therefore not 697 marked with __THROW. */ 698 # ifndef __USE_FILE_OFFSET64 699 extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur; 700 # else 701 # ifdef __REDIRECT 702 extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64) 703 __nonnull ((1)) __wur; 704 # else 705 # define mkostemp mkostemp64 706 # endif 707 # endif 708 # ifdef __USE_LARGEFILE64 709 extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur; 710 # endif 711 #endif 712 713 #ifdef __USE_GNU 714 /* Generate a unique temporary file name from TEMPLATE similar to 715 mkostemp. But allow the caller to pass additional file name suffix. 716 717 This function is a possible cancellation point and therefore not 718 marked with __THROW. */ 719 # ifndef __USE_FILE_OFFSET64 720 extern int mkostemps (char *__template, int __suffixlen, int __flags) __nonnull ((1)) __wur; 721 # else 722 # ifdef __REDIRECT 723 extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen, int __flags), mkostemps64) 724 __nonnull ((1)) __wur; 725 # else 726 # define mkostemps mkostemps64 727 # endif 728 # endif 729 # ifdef __USE_LARGEFILE64 730 extern int mkostemps64 (char *__template, int __suffixlen, int __flags) __nonnull ((1)) __wur; 731 # endif 732 #endif 733 734 735 __BEGIN_NAMESPACE_STD 736 /* Execute the given line as a shell command. 737 738 This function is a cancellation point and therefore not marked with 739 __THROW. */ 740 extern int system (const char *__command) __wur; 741 __END_NAMESPACE_STD 742 743 744 #ifdef __USE_GNU 745 /* Return a malloc'd string containing the canonical absolute name of the 746 existing named file. */ 747 extern char *canonicalize_file_name (const char *__name) 748 __THROW __nonnull ((1)) __wur; 749 #endif 750 751 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED 752 /* Return the canonical absolute name of file NAME. If RESOLVED is 753 null, the result is malloc'd; otherwise, if the canonical name is 754 PATH_MAX chars or more, returns null with `errno' set to 755 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, 756 returns the name in RESOLVED. */ 757 extern char *realpath (const char *__restrict __name, 758 char *__restrict __resolved) __THROW __wur; 759 libc_hidden_proto(realpath) 760 #endif 761 762 763 /* Shorthand for type of comparison functions. */ 764 #ifndef __COMPAR_FN_T 765 # define __COMPAR_FN_T 766 typedef int (*__compar_fn_t) (const void *, const void *); 767 768 # ifdef __USE_GNU 769 typedef __compar_fn_t comparison_fn_t; 770 # endif 771 #endif 772 #ifdef __USE_GNU 773 typedef int (*__compar_d_fn_t) (const void *, const void *, void *); 774 #endif 775 776 __BEGIN_NAMESPACE_STD 777 /* Do a binary search for KEY in BASE, which consists of NMEMB elements 778 of SIZE bytes each, using COMPAR to perform the comparisons. */ 779 extern void *bsearch (const void *__key, const void *__base, 780 size_t __nmemb, size_t __size, __compar_fn_t __compar) 781 __nonnull ((1, 2, 5)) __wur; 782 783 /* Sort NMEMB elements of BASE, of SIZE bytes each, 784 using COMPAR to perform the comparisons. */ 785 extern void qsort (void *__base, size_t __nmemb, size_t __size, 786 __compar_fn_t __compar) __nonnull ((1, 4)); 787 libc_hidden_proto(qsort) 788 #ifdef __USE_GNU 789 extern void qsort_r (void *__base, size_t __nmemb, size_t __size, 790 __compar_d_fn_t __compar, void *__arg) 791 __nonnull ((1, 4)); 792 libc_hidden_proto(qsort_r) 793 #endif 794 795 /* Return the absolute value of X. */ 796 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; 797 extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur; 798 __END_NAMESPACE_STD 799 800 #ifdef __USE_ISOC99 801 __extension__ extern long long int llabs (long long int __x) 802 __THROW __attribute__ ((__const__)) __wur; 803 #endif 804 805 806 __BEGIN_NAMESPACE_STD 807 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation 808 of the value of NUMER over DENOM. */ 809 /* GCC may have built-ins for these someday. */ 810 extern div_t div (int __numer, int __denom) 811 __THROW __attribute__ ((__const__)) __wur; 812 extern ldiv_t ldiv (long int __numer, long int __denom) 813 __THROW __attribute__ ((__const__)) __wur; 814 __END_NAMESPACE_STD 815 816 #ifdef __USE_ISOC99 817 __BEGIN_NAMESPACE_C99 818 __extension__ extern lldiv_t lldiv (long long int __numer, 819 long long int __denom) 820 __THROW __attribute__ ((__const__)) __wur; 821 __END_NAMESPACE_C99 822 #endif 823 824 825 #if ( defined __USE_SVID || defined __USE_XOPEN_EXTENDED ) && defined __UCLIBC_HAS_FLOATS__ 826 /* Convert floating point numbers to strings. The returned values are 827 valid only until another call to the same function. */ 828 829 # ifdef __UCLIBC_SUSV3_LEGACY__ 830 #if 0 831 /* Convert VALUE to a string with NDIGIT digits and return a pointer to 832 this. Set *DECPT with the position of the decimal character and *SIGN 833 with the sign of the number. */ 834 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt, 835 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur; 836 837 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT 838 with the position of the decimal character and *SIGN with the sign of 839 the number. */ 840 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt, 841 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur; 842 #endif 843 844 /* If possible convert VALUE to a string with NDIGIT significant digits. 845 Otherwise use exponential representation. The resulting string will 846 be written to BUF. */ 847 extern char *gcvt (double __value, int __ndigit, char *__buf) 848 __THROW __nonnull ((3)) __wur; 849 # endif /* __UCLIBC_SUSV3_LEGACY__ */ 850 851 852 # if 0 /*def __USE_MISC*/ 853 /* Long double versions of above functions. */ 854 extern char *qecvt (long double __value, int __ndigit, 855 int *__restrict __decpt, int *__restrict __sign) 856 __THROW __nonnull ((3, 4)) __wur; 857 extern char *qfcvt (long double __value, int __ndigit, 858 int *__restrict __decpt, int *__restrict __sign) 859 __THROW __nonnull ((3, 4)) __wur; 860 extern char *qgcvt (long double __value, int __ndigit, char *__buf) 861 __THROW __nonnull ((3)) __wur; 862 863 864 /* Reentrant version of the functions above which provide their own 865 buffers. */ 866 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt, 867 int *__restrict __sign, char *__restrict __buf, 868 size_t __len) __THROW __nonnull ((3, 4, 5)); 869 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt, 870 int *__restrict __sign, char *__restrict __buf, 871 size_t __len) __THROW __nonnull ((3, 4, 5)); 872 873 extern int qecvt_r (long double __value, int __ndigit, 874 int *__restrict __decpt, int *__restrict __sign, 875 char *__restrict __buf, size_t __len) 876 __THROW __nonnull ((3, 4, 5)); 877 extern int qfcvt_r (long double __value, int __ndigit, 878 int *__restrict __decpt, int *__restrict __sign, 879 char *__restrict __buf, size_t __len) 880 __THROW __nonnull ((3, 4, 5)); 881 # endif /* misc */ 882 #endif /* use MISC || use X/Open Unix */ 883 884 885 #ifdef __UCLIBC_HAS_WCHAR__ 886 __BEGIN_NAMESPACE_STD 887 /* Return the length of the multibyte character 888 in S, which is no longer than N. */ 889 extern int mblen (const char *__s, size_t __n) __THROW __wur; 890 /* Return the length of the given multibyte character, 891 putting its `wchar_t' representation in *PWC. */ 892 extern int mbtowc (wchar_t *__restrict __pwc, 893 const char *__restrict __s, size_t __n) __THROW __wur; 894 /* Put the multibyte character represented 895 by WCHAR in S, returning its length. */ 896 extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur; 897 898 899 /* Convert a multibyte string to a wide char string. */ 900 extern size_t mbstowcs (wchar_t *__restrict __pwcs, 901 const char *__restrict __s, size_t __n) __THROW; 902 /* Convert a wide char string to multibyte string. */ 903 extern size_t wcstombs (char *__restrict __s, 904 const wchar_t *__restrict __pwcs, size_t __n) 905 __THROW; 906 __END_NAMESPACE_STD 907 #endif /* __UCLIBC_HAS_WCHAR__ */ 908 909 910 #ifdef __USE_SVID 911 /* Determine whether the string value of RESPONSE matches the affirmation 912 or negative response expression as specified by the LC_MESSAGES category 913 in the program's current locale. Returns 1 if affirmative, 0 if 914 negative, and -1 if not matching. */ 915 extern int rpmatch (const char *__response) __THROW __nonnull ((1)) __wur; 916 #endif 917 918 919 #ifdef __USE_XOPEN_EXTENDED 920 /* Parse comma separated suboption from *OPTIONP and match against 921 strings in TOKENS. If found return index and set *VALUEP to 922 optional value introduced by an equal sign. If the suboption is 923 not part of TOKENS return in *VALUEP beginning of unknown 924 suboption. On exit *OPTIONP is set to the beginning of the next 925 token or at the terminating NUL character. */ 926 extern int getsubopt (char **__restrict __optionp, 927 char *const *__restrict __tokens, 928 char **__restrict __valuep) 929 __THROW __nonnull ((1, 2, 3)) __wur; 930 #endif 931 932 933 #ifdef __USE_XOPEN 934 # if defined __UCLIBC_HAS_CRYPT__ 935 /* Setup DES tables according KEY. */ 936 extern void setkey (const char *__key) __THROW __nonnull ((1)); 937 # endif /* __UCLIBC_HAS_CRYPT__ */ 938 #endif 939 940 941 /* X/Open pseudo terminal handling. */ 942 943 #ifdef __USE_XOPEN2K 944 /* Return a master pseudo-terminal handle. */ 945 extern int posix_openpt (int __oflag) __wur; 946 #endif 947 948 #ifdef __USE_XOPEN 949 /* The next four functions all take a master pseudo-tty fd and 950 perform an operation on the associated slave: */ 951 952 #ifdef __UCLIBC_HAS_PTY__ 953 /* Chown the slave to the calling user. */ 954 extern int grantpt (int __fd) __THROW; 955 956 /* Release an internal lock so the slave can be opened. 957 Call after grantpt(). */ 958 extern int unlockpt (int __fd) __THROW; 959 960 /* Return the pathname of the pseudo terminal slave assoicated with 961 the master FD is open on, or NULL on errors. 962 The returned storage is good until the next call to this function. */ 963 extern char *ptsname (int __fd) __THROW __wur; 964 #endif /* __UCLIBC_HAS_PTY__ */ 965 #endif 966 967 #ifdef __USE_GNU 968 # if defined __UCLIBC_HAS_PTY__ 969 /* Store at most BUFLEN characters of the pathname of the slave pseudo 970 terminal associated with the master FD is open on in BUF. 971 Return 0 on success, otherwise an error number. */ 972 extern int ptsname_r (int __fd, char *__buf, size_t __buflen) 973 __THROW __nonnull ((2)); 974 libc_hidden_proto(ptsname_r) 975 # endif 976 # if defined __UCLIBC_HAS_GETPT__ 977 /* Open a master pseudo terminal and return its file descriptor. */ 978 extern int getpt (void); 979 # endif 980 #endif 981 982 #ifdef __USE_BSD 983 /* Put the 1 minute, 5 minute and 15 minute load averages into the first 984 NELEM elements of LOADAVG. Return the number written (never more than 985 three, but may be less than NELEM), or -1 if an error occurred. */ 986 extern int getloadavg (double __loadavg[], int __nelem) 987 __THROW __nonnull ((1)); 988 989 /* reallocarray() only provided by the malloc-standard implementation */ 990 #if defined(__MALLOC_STANDARD__) 991 extern void *reallocarray (void *__ptr, size_t __m, size_t __n); 992 #endif 993 994 #endif 995 996 #ifdef _LIBC 997 extern int __drand48_iterate (unsigned short int xsubi[3], struct drand48_data *buffer) attribute_hidden; 998 999 /* Global state for non-reentrant functions. */ 1000 extern struct drand48_data __libc_drand48_data attribute_hidden; 1001 #endif 1002 1003 #endif /* don't just need malloc and calloc */ 1004 #undef __need_malloc_and_calloc 1005 1006 __END_DECLS 1007 1008 #endif /* stdlib.h */ 1009