1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Chris Torek. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef _STDIO_H_ 36 #define _STDIO_H_ 37 38 #include <sys/cdefs.h> 39 #include <sys/_null.h> 40 #include <sys/_types.h> 41 42 __NULLABILITY_PRAGMA_PUSH 43 44 typedef __off_t fpos_t; 45 46 #ifndef _SIZE_T_DECLARED 47 typedef __size_t size_t; 48 #define _SIZE_T_DECLARED 49 #endif 50 51 #ifndef _RSIZE_T_DEFINED 52 #define _RSIZE_T_DEFINED 53 typedef size_t rsize_t; 54 #endif 55 56 #if __POSIX_VISIBLE >= 200809 57 #ifndef _OFF_T_DECLARED 58 #define _OFF_T_DECLARED 59 typedef __off_t off_t; 60 #endif 61 #ifndef _SSIZE_T_DECLARED 62 #define _SSIZE_T_DECLARED 63 typedef __ssize_t ssize_t; 64 #endif 65 #endif 66 67 #ifndef _OFF64_T_DECLARED 68 #define _OFF64_T_DECLARED 69 typedef __off64_t off64_t; 70 #endif 71 72 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 73 #ifndef _VA_LIST_DECLARED 74 typedef __va_list va_list; 75 #define _VA_LIST_DECLARED 76 #endif 77 #endif 78 79 #define _FSTDIO /* Define for new stdio with functions. */ 80 81 /* 82 * NB: to fit things in six character monocase externals, the stdio 83 * code uses the prefix `__s' for stdio objects, typically followed 84 * by a three-character attempt at a mnemonic. 85 */ 86 87 /* stdio buffers */ 88 struct __sbuf { 89 unsigned char *_base; 90 int _size; 91 }; 92 93 /* 94 * stdio state variables. 95 * 96 * The following always hold: 97 * 98 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), 99 * _lbfsize is -_bf._size, else _lbfsize is 0 100 * if _flags&__SRD, _w is 0 101 * if _flags&__SWR, _r is 0 102 * 103 * This ensures that the getc and putc macros (or inline functions) never 104 * try to write or read from a file that is in `read' or `write' mode. 105 * (Moreover, they can, and do, automatically switch from read mode to 106 * write mode, and back, on "r+" and "w+" files.) 107 * 108 * _lbfsize is used only to make the inline line-buffered output stream 109 * code as compact as possible. 110 * 111 * _ub, _up, and _ur are used when ungetc() pushes back more characters 112 * than fit in the current _bf, or when ungetc() pushes back a character 113 * that does not match the previous one in _bf. When this happens, 114 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff 115 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. 116 * 117 * Certain members of __sFILE are accessed directly via macros or 118 * inline functions. To preserve ABI compat, these members must not 119 * be disturbed. These members are marked below with (*). 120 */ 121 struct __sFILE { 122 unsigned char *_p; /* (*) current position in (some) buffer */ 123 int _r; /* (*) read space left for getc() */ 124 int _w; /* (*) write space left for putc() */ 125 short _flags; /* (*) flags, below; this FILE is free if 0 */ 126 short _file; /* (*) fileno, if Unix descriptor, else -1 */ 127 struct __sbuf _bf; /* (*) the buffer (at least 1 byte, if !NULL) */ 128 int _lbfsize; /* (*) 0 or -_bf._size, for inline putc */ 129 130 /* operations */ 131 void *_cookie; /* (*) cookie passed to io functions */ 132 int (* _Nullable _close)(void *); 133 int (* _Nullable _read)(void *, char *, int); 134 fpos_t (* _Nullable _seek)(void *, fpos_t, int); 135 int (* _Nullable _write)(void *, const char *, int); 136 137 /* separate buffer for long sequences of ungetc() */ 138 struct __sbuf _ub; /* ungetc buffer */ 139 unsigned char *_up; /* saved _p when _p is doing ungetc data */ 140 int _ur; /* saved _r when _r is counting ungetc data */ 141 142 /* tricks to meet minimum requirements even when malloc() fails */ 143 unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */ 144 unsigned char _nbuf[1]; /* guarantee a getc() buffer */ 145 146 /* separate buffer for fgetln() when line crosses buffer boundary */ 147 struct __sbuf _lb; /* buffer for fgetln() */ 148 149 /* Unix stdio files get aligned to block boundaries on fseek() */ 150 int _blksize; /* stat.st_blksize (may be != _bf._size) */ 151 fpos_t _offset; /* current lseek offset */ 152 153 struct pthread_mutex *_fl_mutex; /* used for MT-safety */ 154 struct pthread *_fl_owner; /* current owner */ 155 int _fl_count; /* recursive lock count */ 156 int _orientation; /* orientation for fwide() */ 157 __mbstate_t _mbstate; /* multibyte conversion state */ 158 int _flags2; /* additional flags */ 159 }; 160 #ifndef _STDFILE_DECLARED 161 #define _STDFILE_DECLARED 162 typedef struct __sFILE FILE; 163 #endif 164 #ifndef _STDSTREAM_DECLARED 165 __BEGIN_DECLS 166 extern FILE *__stdinp; 167 extern FILE *__stdoutp; 168 extern FILE *__stderrp; 169 __END_DECLS 170 #define _STDSTREAM_DECLARED 171 #endif 172 173 #define __SLBF 0x0001 /* line buffered */ 174 #define __SNBF 0x0002 /* unbuffered */ 175 #define __SRD 0x0004 /* OK to read */ 176 #define __SWR 0x0008 /* OK to write */ 177 /* RD and WR are never simultaneously asserted */ 178 #define __SRW 0x0010 /* open for reading & writing */ 179 #define __SEOF 0x0020 /* found EOF */ 180 #define __SERR 0x0040 /* found error */ 181 #define __SMBF 0x0080 /* _bf._base is from malloc */ 182 #define __SAPP 0x0100 /* fdopen()ed in append mode */ 183 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ 184 #define __SOPT 0x0400 /* do fseek() optimization */ 185 #define __SNPT 0x0800 /* do not do fseek() optimization */ 186 #define __SOFF 0x1000 /* set iff _offset is in fact correct */ 187 #define __SMOD 0x2000 /* true => fgetln modified _p text */ 188 #define __SALC 0x4000 /* allocate string space dynamically */ 189 #define __SIGN 0x8000 /* ignore this file in _fwalk */ 190 191 #define __S2OAP 0x0001 /* O_APPEND mode is set */ 192 193 /* 194 * The following three definitions are for ANSI C, which took them 195 * from System V, which brilliantly took internal interface macros and 196 * made them official arguments to setvbuf(), without renaming them. 197 * Hence, these ugly _IOxxx names are *supposed* to appear in user code. 198 * 199 * Although numbered as their counterparts above, the implementation 200 * does not rely on this. 201 */ 202 #define _IOFBF 0 /* setvbuf should set fully buffered */ 203 #define _IOLBF 1 /* setvbuf should set line buffered */ 204 #define _IONBF 2 /* setvbuf should set unbuffered */ 205 206 #define BUFSIZ 1024 /* size of buffer used by setbuf */ 207 #define EOF (-1) 208 209 /* 210 * FOPEN_MAX is a minimum maximum, and is the number of streams that 211 * stdio can provide without attempting to allocate further resources 212 * (which could fail). Do not use this for anything. 213 */ 214 /* must be == _POSIX_STREAM_MAX <limits.h> */ 215 #ifndef FOPEN_MAX 216 #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ 217 #endif 218 #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ 219 220 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */ 221 #if __XSI_VISIBLE 222 #define P_tmpdir "/tmp/" 223 #endif 224 #define L_tmpnam 1024 /* XXX must be == PATH_MAX */ 225 #define TMP_MAX 308915776 226 227 #ifndef SEEK_SET 228 #define SEEK_SET 0 /* set file offset to offset */ 229 #endif 230 #ifndef SEEK_CUR 231 #define SEEK_CUR 1 /* set file offset to current plus offset */ 232 #endif 233 #ifndef SEEK_END 234 #define SEEK_END 2 /* set file offset to EOF plus offset */ 235 #endif 236 237 #define stdin __stdinp 238 #define stdout __stdoutp 239 #define stderr __stderrp 240 241 /* 242 * Functions defined in all versions of POSIX 1003.1. 243 */ 244 #if __BSD_VISIBLE || (__POSIX_VISIBLE && __POSIX_VISIBLE <= 199506) 245 #define L_cuserid 17 /* size for cuserid(3); MAXLOGNAME, legacy */ 246 #endif 247 248 #if __POSIX_VISIBLE 249 #define L_ctermid 1024 /* size for ctermid(3); PATH_MAX */ 250 #endif /* __POSIX_VISIBLE */ 251 252 #if !defined(_STANDALONE) && defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 253 #include <ssp/stdio.h> 254 #endif 255 256 __BEGIN_DECLS 257 #ifdef _XLOCALE_H_ 258 #include <xlocale/_stdio.h> 259 #endif 260 /* 261 * Functions defined in ANSI C standard. 262 */ 263 void clearerr(FILE *); 264 int fclose(FILE *); 265 int feof(FILE *); 266 int ferror(FILE *); 267 int fflush(FILE *); 268 int fgetc(FILE *); 269 int fgetpos(FILE * __restrict, fpos_t * __restrict); 270 char *(fgets)(char * __restrict, int, FILE * __restrict); 271 FILE *fopen(const char * __restrict, const char * __restrict); 272 int fprintf(FILE * __restrict, const char * __restrict, ...); 273 int fputc(int, FILE *); 274 int fputs(const char * __restrict, FILE * __restrict); 275 size_t fread(void * __restrict, size_t, size_t, FILE * __restrict); 276 FILE *freopen(const char * __restrict, const char * __restrict, FILE * __restrict); 277 int fscanf(FILE * __restrict, const char * __restrict, ...); 278 int fseek(FILE *, long, int); 279 int fsetpos(FILE *, const fpos_t *); 280 long ftell(FILE *); 281 size_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict); 282 int getc(FILE *); 283 int getchar(void); 284 #if __EXT1_VISIBLE 285 char *gets_s(char *, rsize_t); 286 #endif 287 void perror(const char *); 288 int printf(const char * __restrict, ...); 289 int putc(int, FILE *); 290 int putchar(int); 291 int puts(const char *); 292 int remove(const char *); 293 int rename(const char *, const char *); 294 void rewind(FILE *); 295 int scanf(const char * __restrict, ...); 296 void setbuf(FILE * __restrict, char * __restrict); 297 int setvbuf(FILE * __restrict, char * __restrict, int, size_t); 298 int (sprintf)(char * __restrict, const char * __restrict, ...); 299 int sscanf(const char * __restrict, const char * __restrict, ...); 300 FILE *tmpfile(void); 301 char *tmpnam(char *); 302 int ungetc(int, FILE *); 303 int vfprintf(FILE * __restrict, const char * __restrict, 304 __va_list); 305 int vprintf(const char * __restrict, __va_list); 306 int (vsprintf)(char * __restrict, const char * __restrict, 307 __va_list); 308 309 #if __ISO_C_VISIBLE >= 1999 || __POSIX_VISIBLE >= 199506 310 int (snprintf)(char * __restrict, size_t, const char * __restrict, 311 ...) __printflike(3, 4); 312 int (vsnprintf)(char * __restrict, size_t, const char * __restrict, 313 __va_list) __printflike(3, 0); 314 #endif 315 #if __ISO_C_VISIBLE >= 1999 316 int vfscanf(FILE * __restrict, const char * __restrict, __va_list) 317 __scanflike(2, 0); 318 int vscanf(const char * __restrict, __va_list) __scanflike(1, 0); 319 int vsscanf(const char * __restrict, const char * __restrict, __va_list) 320 __scanflike(2, 0); 321 #endif 322 323 #if __POSIX_VISIBLE 324 char *ctermid(char *); 325 FILE *fdopen(int, const char *); 326 int fileno(FILE *); 327 #endif /* __POSIX_VISIBLE */ 328 329 #if __POSIX_VISIBLE >= 199209 330 int pclose(FILE *); 331 FILE *popen(const char *, const char *); 332 #endif 333 334 #if __POSIX_VISIBLE >= 199506 335 int ftrylockfile(FILE *); 336 void flockfile(FILE *); 337 void funlockfile(FILE *); 338 339 /* 340 * These are normally used through macros as defined below, but POSIX 341 * requires functions as well. 342 */ 343 int getc_unlocked(FILE *); 344 int getchar_unlocked(void); 345 int putc_unlocked(int, FILE *); 346 int putchar_unlocked(int); 347 #endif 348 #if __BSD_VISIBLE 349 void clearerr_unlocked(FILE *); 350 int feof_unlocked(FILE *); 351 int ferror_unlocked(FILE *); 352 int fflush_unlocked(FILE *); 353 int fileno_unlocked(FILE *); 354 int fputc_unlocked(int, FILE *); 355 int fputs_unlocked(const char * __restrict, FILE * __restrict); 356 size_t fread_unlocked(void * __restrict, size_t, size_t, FILE * __restrict); 357 size_t fwrite_unlocked(const void * __restrict, size_t, size_t, 358 FILE * __restrict); 359 #endif 360 361 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE >= 500 362 int fseeko(FILE *, __off_t, int); 363 __off_t ftello(FILE *); 364 #endif 365 366 #if __BSD_VISIBLE || __XSI_VISIBLE > 0 && __XSI_VISIBLE < 600 367 int getw(FILE *); 368 int putw(int, FILE *); 369 #endif /* BSD or X/Open before issue 6 */ 370 371 #if __XSI_VISIBLE 372 char *tempnam(const char *, const char *); 373 #endif 374 375 #if __POSIX_VISIBLE >= 200809 376 FILE *fmemopen(void * __restrict, size_t, const char * __restrict); 377 ssize_t getdelim(char ** __restrict, size_t * __restrict, int, 378 FILE * __restrict); 379 FILE *open_memstream(char **, size_t *); 380 int renameat(int, const char *, int, const char *); 381 int vdprintf(int, const char * __restrict, __va_list) __printflike(2, 0); 382 /* _WITH_GETLINE to allow pre 11 sources to build on 11+ systems */ 383 ssize_t getline(char ** __restrict, size_t * __restrict, FILE * __restrict); 384 int dprintf(int, const char * __restrict, ...) __printflike(2, 3); 385 #endif /* __POSIX_VISIBLE >= 200809 */ 386 387 /* 388 * Routines that are purely local. 389 */ 390 #if __BSD_VISIBLE 391 int asprintf(char **, const char *, ...) __printflike(2, 3); 392 char *ctermid_r(char *); 393 void fcloseall(void); 394 int fdclose(FILE *, int *); 395 char *fgetln(FILE *, size_t *); 396 const char *fmtcheck(const char *, const char *) __format_arg(2); 397 int fpurge(FILE *); 398 void setbuffer(FILE *, char *, int); 399 int setlinebuf(FILE *); 400 int vasprintf(char **, const char *, __va_list) 401 __printflike(2, 0); 402 403 /* 404 * The system error table contains messages for the first sys_nerr 405 * positive errno values. Use strerror() or strerror_r() from <string.h> 406 * instead. 407 */ 408 extern const int sys_nerr; 409 extern const char * const sys_errlist[]; 410 411 /* 412 * Stdio function-access interface. 413 */ 414 FILE *funopen(const void *, 415 int (* _Nullable)(void *, char *, int), 416 int (* _Nullable)(void *, const char *, int), 417 fpos_t (* _Nullable)(void *, fpos_t, int), 418 int (* _Nullable)(void *)); 419 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) 420 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) 421 422 #if __BSD_VISIBLE 423 typedef __ssize_t cookie_read_function_t(void *, char *, size_t); 424 typedef __ssize_t cookie_write_function_t(void *, const char *, size_t); 425 typedef int cookie_seek_function_t(void *, off64_t *, int); 426 typedef int cookie_close_function_t(void *); 427 typedef struct { 428 cookie_read_function_t *read; 429 cookie_write_function_t *write; 430 cookie_seek_function_t *seek; 431 cookie_close_function_t *close; 432 } cookie_io_functions_t; 433 FILE *fopencookie(void *, const char *, cookie_io_functions_t); 434 #endif 435 436 /* 437 * Portability hacks. See <sys/types.h>. 438 */ 439 #ifndef _FTRUNCATE_DECLARED 440 #define _FTRUNCATE_DECLARED 441 int ftruncate(int, __off_t); 442 #endif 443 #ifndef _LSEEK_DECLARED 444 #define _LSEEK_DECLARED 445 __off_t lseek(int, __off_t, int); 446 #endif 447 #ifndef _MMAP_DECLARED 448 #define _MMAP_DECLARED 449 void *mmap(void *, size_t, int, int, int, __off_t); 450 #endif 451 #ifndef _TRUNCATE_DECLARED 452 #define _TRUNCATE_DECLARED 453 int truncate(const char *, __off_t); 454 #endif 455 #endif /* __BSD_VISIBLE */ 456 457 /* 458 * Functions internal to the implementation. 459 */ 460 int __srget(FILE *); 461 int __swbuf(int, FILE *); 462 463 /* 464 * The __sfoo macros are here so that we can 465 * define function versions in the C library. 466 */ 467 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) 468 #if defined(__GNUC__) && defined(__STDC__) 469 static __inline int __sputc(int _c, FILE *_p) { 470 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) 471 return (*_p->_p++ = _c); 472 else 473 return (__swbuf(_c, _p)); 474 } 475 #else 476 /* 477 * This has been tuned to generate reasonable code on the vax using pcc. 478 */ 479 #define __sputc(c, p) \ 480 (--(p)->_w < 0 ? \ 481 (p)->_w >= (p)->_lbfsize ? \ 482 (*(p)->_p = (c)), *(p)->_p != '\n' ? \ 483 (int)*(p)->_p++ : \ 484 __swbuf('\n', p) : \ 485 __swbuf((int)(c), p) : \ 486 (*(p)->_p = (c), (int)*(p)->_p++)) 487 #endif 488 489 #ifndef __LIBC_ISTHREADED_DECLARED 490 #define __LIBC_ISTHREADED_DECLARED 491 extern int __isthreaded; 492 #endif 493 494 #ifndef __cplusplus 495 496 #define __sfeof(p) (((p)->_flags & __SEOF) != 0) 497 #define __sferror(p) (((p)->_flags & __SERR) != 0) 498 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) 499 #define __sfileno(p) ((p)->_file) 500 501 502 #define feof(p) (!__isthreaded ? __sfeof(p) : (feof)(p)) 503 #define ferror(p) (!__isthreaded ? __sferror(p) : (ferror)(p)) 504 #define clearerr(p) (!__isthreaded ? __sclearerr(p) : (clearerr)(p)) 505 506 #if __POSIX_VISIBLE 507 #define fileno(p) (!__isthreaded ? __sfileno(p) : (fileno)(p)) 508 #endif 509 510 #define getc(fp) (!__isthreaded ? __sgetc(fp) : (getc)(fp)) 511 #define putc(x, fp) (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp)) 512 513 #define getchar() getc(stdin) 514 #define putchar(x) putc(x, stdout) 515 516 #if __BSD_VISIBLE 517 /* 518 * See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12 519 * B.8.2.7 for the rationale behind the *_unlocked() macros. 520 */ 521 #define clearerr_unlocked(p) __sclearerr(p) 522 #define feof_unlocked(p) __sfeof(p) 523 #define ferror_unlocked(p) __sferror(p) 524 #define fileno_unlocked(p) __sfileno(p) 525 #define fputc_unlocked(s, p) __sputc(s, p) 526 #endif 527 #if __POSIX_VISIBLE >= 199506 528 #define getc_unlocked(fp) __sgetc(fp) 529 #define putc_unlocked(x, fp) __sputc(x, fp) 530 531 #define getchar_unlocked() getc_unlocked(stdin) 532 #define putchar_unlocked(x) putc_unlocked(x, stdout) 533 #endif 534 #endif /* __cplusplus */ 535 536 __END_DECLS 537 __NULLABILITY_PRAGMA_POP 538 539 #endif /* !_STDIO_H_ */ 540