lib/stdio.in.h

   1 /* A GNU-like <stdio.h>.
   2
   3    Copyright (C) 2004, 2007-2017 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #if __GNUC__ >= 3
  19 @PRAGMA_SYSTEM_HEADER@
  20 #endif
  21 @PRAGMA_COLUMNS@
  22
  23 #if defined __need_FILE || defined __need___FILE || defined _GL_ALREADY_INCLUDING_STDIO_H
  24 /* Special invocation convention:
  25    - Inside glibc header files.
  26    - On OSF/1 5.1 we have a sequence of nested includes
  27      <stdio.h> -> <getopt.h> -> <ctype.h> -> <sys/localedef.h> ->
  28      <sys/lc_core.h> -> <nl_types.h> -> <mesg.h> -> <stdio.h>.
  29      In this situation, the functions are not yet declared, therefore we cannot
  30      provide the C++ aliases.  */
  31
  32 #@INCLUDE_NEXT@ @NEXT_STDIO_H@
  33
  34 #else
  35 /* Normal invocation convention.  */
  36
  37 #ifndef _@GUARD_PREFIX@_STDIO_H
  38
  39 #define _GL_ALREADY_INCLUDING_STDIO_H
  40
  41 /* The include_next requires a split double-inclusion guard.  */
  42 #@INCLUDE_NEXT@ @NEXT_STDIO_H@
  43
  44 #undef _GL_ALREADY_INCLUDING_STDIO_H
  45
  46 #ifndef _@GUARD_PREFIX@_STDIO_H
  47 #define _@GUARD_PREFIX@_STDIO_H
  48
  49 /* Get va_list.  Needed on many systems, including glibc 2.8.  */
  50 #include <stdarg.h>
  51
  52 #include <stddef.h>
  53
  54 /* Get off_t and ssize_t.  Needed on many systems, including glibc 2.8
  55    and eglibc 2.11.2.
  56    May also define off_t to a 64-bit type on native Windows.  */
  57 #include <sys/types.h>
  58
  59 /* The __attribute__ feature is available in gcc versions 2.5 and later.
  60    The __-protected variants of the attributes 'format' and 'printf' are
  61    accepted by gcc versions 2.6.4 (effectively 2.7) and later.
  62    We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
  63    gnulib and libintl do '#define printf __printf__' when they override
  64    the 'printf' function.  */
  65 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
  66 # define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
  67 #else
  68 # define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
  69 #endif
  70
  71 /* _GL_ATTRIBUTE_FORMAT_PRINTF
  72    indicates to GCC that the function takes a format string and arguments,
  73    where the format string directives are the ones standardized by ISO C99
  74    and POSIX.  */
  75 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
  76 # define _GL_ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
  77    _GL_ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
  78 #else
  79 # define _GL_ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
  80    _GL_ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
  81 #endif
  82
  83 /* _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM is like _GL_ATTRIBUTE_FORMAT_PRINTF,
  84    except that it indicates to GCC that the supported format string directives
  85    are the ones of the system printf(), rather than the ones standardized by
  86    ISO C99 and POSIX.  */
  87 #if GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU
  88 # define _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM(formatstring_parameter, first_argument) \
  89   _GL_ATTRIBUTE_FORMAT_PRINTF (formatstring_parameter, first_argument)
  90 #else
  91 # define _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM(formatstring_parameter, first_argument) \
  92   _GL_ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
  93 #endif
  94
  95 /* _GL_ATTRIBUTE_FORMAT_SCANF
  96    indicates to GCC that the function takes a format string and arguments,
  97    where the format string directives are the ones standardized by ISO C99
  98    and POSIX.  */
  99 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
 100 # define _GL_ATTRIBUTE_FORMAT_SCANF(formatstring_parameter, first_argument) \
 101    _GL_ATTRIBUTE_FORMAT ((__gnu_scanf__, formatstring_parameter, first_argument))
 102 #else
 103 # define _GL_ATTRIBUTE_FORMAT_SCANF(formatstring_parameter, first_argument) \
 104    _GL_ATTRIBUTE_FORMAT ((__scanf__, formatstring_parameter, first_argument))
 105 #endif
 106
 107 /* _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM is like _GL_ATTRIBUTE_FORMAT_SCANF,
 108    except that it indicates to GCC that the supported format string directives
 109    are the ones of the system scanf(), rather than the ones standardized by
 110    ISO C99 and POSIX.  */
 111 #define _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM(formatstring_parameter, first_argument) \
 112   _GL_ATTRIBUTE_FORMAT ((__scanf__, formatstring_parameter, first_argument))
 113
 114 /* Solaris 10 and NetBSD 7.0 declare renameat in <unistd.h>, not in <stdio.h>.  */
 115 /* But in any case avoid namespace pollution on glibc systems.  */
 116 #if (@GNULIB_RENAMEAT@ || defined GNULIB_POSIXCHECK) && (defined __sun || defined __NetBSD__) \
 117     && ! defined __GLIBC__
 118 # include <unistd.h>
 119 #endif
 120
 121 /* MSVC declares 'perror' in <stdlib.h>, not in <stdio.h>.  We must include
 122    it before we  #define perror rpl_perror.  */
 123 /* But in any case avoid namespace pollution on glibc systems.  */
 124 #if (@GNULIB_PERROR@ || defined GNULIB_POSIXCHECK) \
 125     && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__) \
 126     && ! defined __GLIBC__
 127 # include <stdlib.h>
 128 #endif
 129
 130 /* MSVC declares 'remove' in <io.h>, not in <stdio.h>.  We must include
 131    it before we  #define remove rpl_remove.  */
 132 /* MSVC declares 'rename' in <io.h>, not in <stdio.h>.  We must include
 133    it before we  #define rename rpl_rename.  */
 134 /* But in any case avoid namespace pollution on glibc systems.  */
 135 #if (@GNULIB_REMOVE@ || @GNULIB_RENAME@ || defined GNULIB_POSIXCHECK) \
 136     && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__) \
 137     && ! defined __GLIBC__
 138 # include <io.h>
 139 #endif
 140
 141
 142 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
 143
 144 /* The definition of _GL_ARG_NONNULL is copied here.  */
 145
 146 /* The definition of _GL_WARN_ON_USE is copied here.  */
 147
 148 /* Macros for stringification.  */
 149 #define _GL_STDIO_STRINGIZE(token) #token
 150 #define _GL_STDIO_MACROEXPAND_AND_STRINGIZE(token) _GL_STDIO_STRINGIZE(token)
 151
 152 /* When also using extern inline, suppress the use of static inline in
 153    standard headers of problematic Apple configurations, as Libc at
 154    least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
 155    <http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>.
 156    Perhaps Apple will fix this some day.  */
 157 #if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
 158      && defined __GNUC__ && defined __STDC__)
 159 # undef putc_unlocked
 160 #endif
 161
 162 #if @GNULIB_DPRINTF@
 163 # if @REPLACE_DPRINTF@
 164 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 165 #   define dprintf rpl_dprintf
 166 #  endif
 167 _GL_FUNCDECL_RPL (dprintf, int, (int fd, const char *format, ...)
 168                                 _GL_ATTRIBUTE_FORMAT_PRINTF (2, 3)
 169                                 _GL_ARG_NONNULL ((2)));
 170 _GL_CXXALIAS_RPL (dprintf, int, (int fd, const char *format, ...));
 171 # else
 172 #  if !@HAVE_DPRINTF@
 173 _GL_FUNCDECL_SYS (dprintf, int, (int fd, const char *format, ...)
 174                                 _GL_ATTRIBUTE_FORMAT_PRINTF (2, 3)
 175                                 _GL_ARG_NONNULL ((2)));
 176 #  endif
 177 _GL_CXXALIAS_SYS (dprintf, int, (int fd, const char *format, ...));
 178 # endif
 179 _GL_CXXALIASWARN (dprintf);
 180 #elif defined GNULIB_POSIXCHECK
 181 # undef dprintf
 182 # if HAVE_RAW_DECL_DPRINTF
 183 _GL_WARN_ON_USE (dprintf, "dprintf is unportable - "
 184                  "use gnulib module dprintf for portability");
 185 # endif
 186 #endif
 187
 188 #if @GNULIB_FCLOSE@
 189 /* Close STREAM and its underlying file descriptor.  */
 190 # if @REPLACE_FCLOSE@
 191 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 192 #   define fclose rpl_fclose
 193 #  endif
 194 _GL_FUNCDECL_RPL (fclose, int, (FILE *stream) _GL_ARG_NONNULL ((1)));
 195 _GL_CXXALIAS_RPL (fclose, int, (FILE *stream));
 196 # else
 197 _GL_CXXALIAS_SYS (fclose, int, (FILE *stream));
 198 # endif
 199 _GL_CXXALIASWARN (fclose);
 200 #elif defined GNULIB_POSIXCHECK
 201 # undef fclose
 202 /* Assume fclose is always declared.  */
 203 _GL_WARN_ON_USE (fclose, "fclose is not always POSIX compliant - "
 204                  "use gnulib module fclose for portable POSIX compliance");
 205 #endif
 206
 207 #if @GNULIB_FDOPEN@
 208 # if @REPLACE_FDOPEN@
 209 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 210 #   undef fdopen
 211 #   define fdopen rpl_fdopen
 212 #  endif
 213 _GL_FUNCDECL_RPL (fdopen, FILE *, (int fd, const char *mode)
 214                                   _GL_ARG_NONNULL ((2)));
 215 _GL_CXXALIAS_RPL (fdopen, FILE *, (int fd, const char *mode));
 216 # else
 217 _GL_CXXALIAS_SYS (fdopen, FILE *, (int fd, const char *mode));
 218 # endif
 219 _GL_CXXALIASWARN (fdopen);
 220 #elif defined GNULIB_POSIXCHECK
 221 # undef fdopen
 222 /* Assume fdopen is always declared.  */
 223 _GL_WARN_ON_USE (fdopen, "fdopen on native Windows platforms is not POSIX compliant - "
 224                  "use gnulib module fdopen for portability");
 225 #endif
 226
 227 #if @GNULIB_FFLUSH@
 228 /* Flush all pending data on STREAM according to POSIX rules.  Both
 229    output and seekable input streams are supported.
 230    Note! LOSS OF DATA can occur if fflush is applied on an input stream
 231    that is _not_seekable_ or on an update stream that is _not_seekable_
 232    and in which the most recent operation was input.  Seekability can
 233    be tested with lseek(fileno(fp),0,SEEK_CUR).  */
 234 # if @REPLACE_FFLUSH@
 235 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 236 #   define fflush rpl_fflush
 237 #  endif
 238 _GL_FUNCDECL_RPL (fflush, int, (FILE *gl_stream));
 239 _GL_CXXALIAS_RPL (fflush, int, (FILE *gl_stream));
 240 # else
 241 _GL_CXXALIAS_SYS (fflush, int, (FILE *gl_stream));
 242 # endif
 243 _GL_CXXALIASWARN (fflush);
 244 #elif defined GNULIB_POSIXCHECK
 245 # undef fflush
 246 /* Assume fflush is always declared.  */
 247 _GL_WARN_ON_USE (fflush, "fflush is not always POSIX compliant - "
 248                  "use gnulib module fflush for portable POSIX compliance");
 249 #endif
 250
 251 #if @GNULIB_FGETC@
 252 # if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
 253 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 254 #   undef fgetc
 255 #   define fgetc rpl_fgetc
 256 #  endif
 257 _GL_FUNCDECL_RPL (fgetc, int, (FILE *stream) _GL_ARG_NONNULL ((1)));
 258 _GL_CXXALIAS_RPL (fgetc, int, (FILE *stream));
 259 # else
 260 _GL_CXXALIAS_SYS (fgetc, int, (FILE *stream));
 261 # endif
 262 _GL_CXXALIASWARN (fgetc);
 263 #endif
 264
 265 #if @GNULIB_FGETS@
 266 # if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
 267 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 268 #   undef fgets
 269 #   define fgets rpl_fgets
 270 #  endif
 271 _GL_FUNCDECL_RPL (fgets, char *, (char *s, int n, FILE *stream)
 272                                  _GL_ARG_NONNULL ((1, 3)));
 273 _GL_CXXALIAS_RPL (fgets, char *, (char *s, int n, FILE *stream));
 274 # else
 275 _GL_CXXALIAS_SYS (fgets, char *, (char *s, int n, FILE *stream));
 276 # endif
 277 _GL_CXXALIASWARN (fgets);
 278 #endif
 279
 280 #if @GNULIB_FOPEN@
 281 # if @REPLACE_FOPEN@
 282 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 283 #   undef fopen
 284 #   define fopen rpl_fopen
 285 #  endif
 286 _GL_FUNCDECL_RPL (fopen, FILE *, (const char *filename, const char *mode)
 287                                  _GL_ARG_NONNULL ((1, 2)));
 288 _GL_CXXALIAS_RPL (fopen, FILE *, (const char *filename, const char *mode));
 289 # else
 290 _GL_CXXALIAS_SYS (fopen, FILE *, (const char *filename, const char *mode));
 291 # endif
 292 _GL_CXXALIASWARN (fopen);
 293 #elif defined GNULIB_POSIXCHECK
 294 # undef fopen
 295 /* Assume fopen is always declared.  */
 296 _GL_WARN_ON_USE (fopen, "fopen on native Windows platforms is not POSIX compliant - "
 297                  "use gnulib module fopen for portability");
 298 #endif
 299
 300 #if @GNULIB_FPRINTF_POSIX@ || @GNULIB_FPRINTF@
 301 # if (@GNULIB_FPRINTF_POSIX@ && @REPLACE_FPRINTF@) \
 302      || (@GNULIB_FPRINTF@ && @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@))
 303 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 304 #   define fprintf rpl_fprintf
 305 #  endif
 306 #  define GNULIB_overrides_fprintf 1
 307 #  if @GNULIB_FPRINTF_POSIX@ || @GNULIB_VFPRINTF_POSIX@
 308 _GL_FUNCDECL_RPL (fprintf, int, (FILE *fp, const char *format, ...)
 309                                 _GL_ATTRIBUTE_FORMAT_PRINTF (2, 3)
 310                                 _GL_ARG_NONNULL ((1, 2)));
 311 #  else
 312 _GL_FUNCDECL_RPL (fprintf, int, (FILE *fp, const char *format, ...)
 313                                 _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM (2, 3)
 314                                 _GL_ARG_NONNULL ((1, 2)));
 315 #  endif
 316 _GL_CXXALIAS_RPL (fprintf, int, (FILE *fp, const char *format, ...));
 317 # else
 318 _GL_CXXALIAS_SYS (fprintf, int, (FILE *fp, const char *format, ...));
 319 # endif
 320 _GL_CXXALIASWARN (fprintf);
 321 #endif
 322 #if !@GNULIB_FPRINTF_POSIX@ && defined GNULIB_POSIXCHECK
 323 # if !GNULIB_overrides_fprintf
 324 #  undef fprintf
 325 # endif
 326 /* Assume fprintf is always declared.  */
 327 _GL_WARN_ON_USE (fprintf, "fprintf is not always POSIX compliant - "
 328                  "use gnulib module fprintf-posix for portable "
 329                  "POSIX compliance");
 330 #endif
 331
 332 #if @GNULIB_FPURGE@
 333 /* Discard all pending buffered I/O data on STREAM.
 334    STREAM must not be wide-character oriented.
 335    When discarding pending output, the file position is set back to where it
 336    was before the write calls.  When discarding pending input, the file
 337    position is advanced to match the end of the previously read input.
 338    Return 0 if successful.  Upon error, return -1 and set errno.  */
 339 # if @REPLACE_FPURGE@
 340 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 341 #   define fpurge rpl_fpurge
 342 #  endif
 343 _GL_FUNCDECL_RPL (fpurge, int, (FILE *gl_stream) _GL_ARG_NONNULL ((1)));
 344 _GL_CXXALIAS_RPL (fpurge, int, (FILE *gl_stream));
 345 # else
 346 #  if !@HAVE_DECL_FPURGE@
 347 _GL_FUNCDECL_SYS (fpurge, int, (FILE *gl_stream) _GL_ARG_NONNULL ((1)));
 348 #  endif
 349 _GL_CXXALIAS_SYS (fpurge, int, (FILE *gl_stream));
 350 # endif
 351 _GL_CXXALIASWARN (fpurge);
 352 #elif defined GNULIB_POSIXCHECK
 353 # undef fpurge
 354 # if HAVE_RAW_DECL_FPURGE
 355 _GL_WARN_ON_USE (fpurge, "fpurge is not always present - "
 356                  "use gnulib module fpurge for portability");
 357 # endif
 358 #endif
 359
 360 #if @GNULIB_FPUTC@
 361 # if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
 362 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 363 #   undef fputc
 364 #   define fputc rpl_fputc
 365 #  endif
 366 _GL_FUNCDECL_RPL (fputc, int, (int c, FILE *stream) _GL_ARG_NONNULL ((2)));
 367 _GL_CXXALIAS_RPL (fputc, int, (int c, FILE *stream));
 368 # else
 369 _GL_CXXALIAS_SYS (fputc, int, (int c, FILE *stream));
 370 # endif
 371 _GL_CXXALIASWARN (fputc);
 372 #endif
 373
 374 #if @GNULIB_FPUTS@
 375 # if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
 376 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 377 #   undef fputs
 378 #   define fputs rpl_fputs
 379 #  endif
 380 _GL_FUNCDECL_RPL (fputs, int, (const char *string, FILE *stream)
 381                               _GL_ARG_NONNULL ((1, 2)));
 382 _GL_CXXALIAS_RPL (fputs, int, (const char *string, FILE *stream));
 383 # else
 384 _GL_CXXALIAS_SYS (fputs, int, (const char *string, FILE *stream));
 385 # endif
 386 _GL_CXXALIASWARN (fputs);
 387 #endif
 388
 389 #if @GNULIB_FREAD@
 390 # if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
 391 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 392 #   undef fread
 393 #   define fread rpl_fread
 394 #  endif
 395 _GL_FUNCDECL_RPL (fread, size_t, (void *ptr, size_t s, size_t n, FILE *stream)
 396                                  _GL_ARG_NONNULL ((4)));
 397 _GL_CXXALIAS_RPL (fread, size_t, (void *ptr, size_t s, size_t n, FILE *stream));
 398 # else
 399 _GL_CXXALIAS_SYS (fread, size_t, (void *ptr, size_t s, size_t n, FILE *stream));
 400 # endif
 401 _GL_CXXALIASWARN (fread);
 402 #endif
 403
 404 #if @GNULIB_FREOPEN@
 405 # if @REPLACE_FREOPEN@
 406 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 407 #   undef freopen
 408 #   define freopen rpl_freopen
 409 #  endif
 410 _GL_FUNCDECL_RPL (freopen, FILE *,
 411                   (const char *filename, const char *mode, FILE *stream)
 412                   _GL_ARG_NONNULL ((2, 3)));
 413 _GL_CXXALIAS_RPL (freopen, FILE *,
 414                   (const char *filename, const char *mode, FILE *stream));
 415 # else
 416 _GL_CXXALIAS_SYS (freopen, FILE *,
 417                   (const char *filename, const char *mode, FILE *stream));
 418 # endif
 419 _GL_CXXALIASWARN (freopen);
 420 #elif defined GNULIB_POSIXCHECK
 421 # undef freopen
 422 /* Assume freopen is always declared.  */
 423 _GL_WARN_ON_USE (freopen,
 424                  "freopen on native Windows platforms is not POSIX compliant - "
 425                  "use gnulib module freopen for portability");
 426 #endif
 427
 428 #if @GNULIB_FSCANF@
 429 # if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
 430 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 431 #   undef fscanf
 432 #   define fscanf rpl_fscanf
 433 #  endif
 434 _GL_FUNCDECL_RPL (fscanf, int, (FILE *stream, const char *format, ...)
 435                                _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM (2, 3)
 436                                _GL_ARG_NONNULL ((1, 2)));
 437 _GL_CXXALIAS_RPL (fscanf, int, (FILE *stream, const char *format, ...));
 438 # else
 439 _GL_CXXALIAS_SYS (fscanf, int, (FILE *stream, const char *format, ...));
 440 # endif
 441 _GL_CXXALIASWARN (fscanf);
 442 #endif
 443
 444
 445 /* Set up the following warnings, based on which modules are in use.
 446    GNU Coding Standards discourage the use of fseek, since it imposes
 447    an arbitrary limitation on some 32-bit hosts.  Remember that the
 448    fseek module depends on the fseeko module, so we only have three
 449    cases to consider:
 450
 451    1. The developer is not using either module.  Issue a warning under
 452    GNULIB_POSIXCHECK for both functions, to remind them that both
 453    functions have bugs on some systems.  _GL_NO_LARGE_FILES has no
 454    impact on this warning.
 455
 456    2. The developer is using both modules.  They may be unaware of the
 457    arbitrary limitations of fseek, so issue a warning under
 458    GNULIB_POSIXCHECK.  On the other hand, they may be using both
 459    modules intentionally, so the developer can define
 460    _GL_NO_LARGE_FILES in the compilation units where the use of fseek
 461    is safe, to silence the warning.
 462
 463    3. The developer is using the fseeko module, but not fseek.  Gnulib
 464    guarantees that fseek will still work around platform bugs in that
 465    case, but we presume that the developer is aware of the pitfalls of
 466    fseek and was trying to avoid it, so issue a warning even when
 467    GNULIB_POSIXCHECK is undefined.  Again, _GL_NO_LARGE_FILES can be
 468    defined to silence the warning in particular compilation units.
 469    In C++ compilations with GNULIB_NAMESPACE, in order to avoid that
 470    fseek gets defined as a macro, it is recommended that the developer
 471    uses the fseek module, even if he is not calling the fseek function.
 472
 473    Most gnulib clients that perform stream operations should fall into
 474    category 3.  */
 475
 476 #if @GNULIB_FSEEK@
 477 # if defined GNULIB_POSIXCHECK && !defined _GL_NO_LARGE_FILES
 478 #  define _GL_FSEEK_WARN /* Category 2, above.  */
 479 #  undef fseek
 480 # endif
 481 # if @REPLACE_FSEEK@
 482 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 483 #   undef fseek
 484 #   define fseek rpl_fseek
 485 #  endif
 486 _GL_FUNCDECL_RPL (fseek, int, (FILE *fp, long offset, int whence)
 487                               _GL_ARG_NONNULL ((1)));
 488 _GL_CXXALIAS_RPL (fseek, int, (FILE *fp, long offset, int whence));
 489 # else
 490 _GL_CXXALIAS_SYS (fseek, int, (FILE *fp, long offset, int whence));
 491 # endif
 492 _GL_CXXALIASWARN (fseek);
 493 #endif
 494
 495 #if @GNULIB_FSEEKO@
 496 # if !@GNULIB_FSEEK@ && !defined _GL_NO_LARGE_FILES
 497 #  define _GL_FSEEK_WARN /* Category 3, above.  */
 498 #  undef fseek
 499 # endif
 500 # if @REPLACE_FSEEKO@
 501 /* Provide an fseeko function that is aware of a preceding fflush(), and which
 502    detects pipes.  */
 503 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 504 #   undef fseeko
 505 #   define fseeko rpl_fseeko
 506 #  endif
 507 _GL_FUNCDECL_RPL (fseeko, int, (FILE *fp, off_t offset, int whence)
 508                                _GL_ARG_NONNULL ((1)));
 509 _GL_CXXALIAS_RPL (fseeko, int, (FILE *fp, off_t offset, int whence));
 510 # else
 511 #  if ! @HAVE_DECL_FSEEKO@
 512 _GL_FUNCDECL_SYS (fseeko, int, (FILE *fp, off_t offset, int whence)
 513                                _GL_ARG_NONNULL ((1)));
 514 #  endif
 515 _GL_CXXALIAS_SYS (fseeko, int, (FILE *fp, off_t offset, int whence));
 516 # endif
 517 _GL_CXXALIASWARN (fseeko);
 518 #elif defined GNULIB_POSIXCHECK
 519 # define _GL_FSEEK_WARN /* Category 1, above.  */
 520 # undef fseek
 521 # undef fseeko
 522 # if HAVE_RAW_DECL_FSEEKO
 523 _GL_WARN_ON_USE (fseeko, "fseeko is unportable - "
 524                  "use gnulib module fseeko for portability");
 525 # endif
 526 #endif
 527
 528 #ifdef _GL_FSEEK_WARN
 529 # undef _GL_FSEEK_WARN
 530 /* Here, either fseek is undefined (but C89 guarantees that it is
 531    declared), or it is defined as rpl_fseek (declared above).  */
 532 _GL_WARN_ON_USE (fseek, "fseek cannot handle files larger than 4 GB "
 533                  "on 32-bit platforms - "
 534                  "use fseeko function for handling of large files");
 535 #endif
 536
 537
 538 /* ftell, ftello.  See the comments on fseek/fseeko.  */
 539
 540 #if @GNULIB_FTELL@
 541 # if defined GNULIB_POSIXCHECK && !defined _GL_NO_LARGE_FILES
 542 #  define _GL_FTELL_WARN /* Category 2, above.  */
 543 #  undef ftell
 544 # endif
 545 # if @REPLACE_FTELL@
 546 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 547 #   undef ftell
 548 #   define ftell rpl_ftell
 549 #  endif
 550 _GL_FUNCDECL_RPL (ftell, long, (FILE *fp) _GL_ARG_NONNULL ((1)));
 551 _GL_CXXALIAS_RPL (ftell, long, (FILE *fp));
 552 # else
 553 _GL_CXXALIAS_SYS (ftell, long, (FILE *fp));
 554 # endif
 555 _GL_CXXALIASWARN (ftell);
 556 #endif
 557
 558 #if @GNULIB_FTELLO@
 559 # if !@GNULIB_FTELL@ && !defined _GL_NO_LARGE_FILES
 560 #  define _GL_FTELL_WARN /* Category 3, above.  */
 561 #  undef ftell
 562 # endif
 563 # if @REPLACE_FTELLO@
 564 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 565 #   undef ftello
 566 #   define ftello rpl_ftello
 567 #  endif
 568 _GL_FUNCDECL_RPL (ftello, off_t, (FILE *fp) _GL_ARG_NONNULL ((1)));
 569 _GL_CXXALIAS_RPL (ftello, off_t, (FILE *fp));
 570 # else
 571 #  if ! @HAVE_DECL_FTELLO@
 572 _GL_FUNCDECL_SYS (ftello, off_t, (FILE *fp) _GL_ARG_NONNULL ((1)));
 573 #  endif
 574 _GL_CXXALIAS_SYS (ftello, off_t, (FILE *fp));
 575 # endif
 576 _GL_CXXALIASWARN (ftello);
 577 #elif defined GNULIB_POSIXCHECK
 578 # define _GL_FTELL_WARN /* Category 1, above.  */
 579 # undef ftell
 580 # undef ftello
 581 # if HAVE_RAW_DECL_FTELLO
 582 _GL_WARN_ON_USE (ftello, "ftello is unportable - "
 583                  "use gnulib module ftello for portability");
 584 # endif
 585 #endif
 586
 587 #ifdef _GL_FTELL_WARN
 588 # undef _GL_FTELL_WARN
 589 /* Here, either ftell is undefined (but C89 guarantees that it is
 590    declared), or it is defined as rpl_ftell (declared above).  */
 591 _GL_WARN_ON_USE (ftell, "ftell cannot handle files larger than 4 GB "
 592                  "on 32-bit platforms - "
 593                  "use ftello function for handling of large files");
 594 #endif
 595
 596
 597 #if @GNULIB_FWRITE@
 598 # if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
 599 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 600 #   undef fwrite
 601 #   define fwrite rpl_fwrite
 602 #  endif
 603 _GL_FUNCDECL_RPL (fwrite, size_t,
 604                   (const void *ptr, size_t s, size_t n, FILE *stream)
 605                   _GL_ARG_NONNULL ((1, 4)));
 606 _GL_CXXALIAS_RPL (fwrite, size_t,
 607                   (const void *ptr, size_t s, size_t n, FILE *stream));
 608 # else
 609 _GL_CXXALIAS_SYS (fwrite, size_t,
 610                   (const void *ptr, size_t s, size_t n, FILE *stream));
 611
 612 /* Work around bug 11959 when fortifying glibc 2.4 through 2.15
 613    <http://sources.redhat.com/bugzilla/show_bug.cgi?id=11959>,
 614    which sometimes causes an unwanted diagnostic for fwrite calls.
 615    This affects only function declaration attributes under certain
 616    versions of gcc and clang, and is not needed for C++.  */
 617 #  if (0 < __USE_FORTIFY_LEVEL                                          \
 618        && __GLIBC__ == 2 && 4 <= __GLIBC_MINOR__ && __GLIBC_MINOR__ <= 15 \
 619        && 3 < __GNUC__ + (4 <= __GNUC_MINOR__)                          \
 620        && !defined __cplusplus)
 621 #   undef fwrite
 622 #   undef fwrite_unlocked
 623 extern size_t __REDIRECT (rpl_fwrite,
 624                           (const void *__restrict, size_t, size_t,
 625                            FILE *__restrict),
 626                           fwrite);
 627 extern size_t __REDIRECT (rpl_fwrite_unlocked,
 628                           (const void *__restrict, size_t, size_t,
 629                            FILE *__restrict),
 630                           fwrite_unlocked);
 631 #   define fwrite rpl_fwrite
 632 #   define fwrite_unlocked rpl_fwrite_unlocked
 633 #  endif
 634 # endif
 635 _GL_CXXALIASWARN (fwrite);
 636 #endif
 637
 638 #if @GNULIB_GETC@
 639 # if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
 640 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 641 #   undef getc
 642 #   define getc rpl_fgetc
 643 #  endif
 644 _GL_FUNCDECL_RPL (fgetc, int, (FILE *stream) _GL_ARG_NONNULL ((1)));
 645 _GL_CXXALIAS_RPL_1 (getc, rpl_fgetc, int, (FILE *stream));
 646 # else
 647 _GL_CXXALIAS_SYS (getc, int, (FILE *stream));
 648 # endif
 649 _GL_CXXALIASWARN (getc);
 650 #endif
 651
 652 #if @GNULIB_GETCHAR@
 653 # if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
 654 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 655 #   undef getchar
 656 #   define getchar rpl_getchar
 657 #  endif
 658 _GL_FUNCDECL_RPL (getchar, int, (void));
 659 _GL_CXXALIAS_RPL (getchar, int, (void));
 660 # else
 661 _GL_CXXALIAS_SYS (getchar, int, (void));
 662 # endif
 663 _GL_CXXALIASWARN (getchar);
 664 #endif
 665
 666 #if @GNULIB_GETDELIM@
 667 /* Read input, up to (and including) the next occurrence of DELIMITER, from
 668    STREAM, store it in *LINEPTR (and NUL-terminate it).
 669    *LINEPTR is a pointer returned from malloc (or NULL), pointing to *LINESIZE
 670    bytes of space.  It is realloc'd as necessary.
 671    Return the number of bytes read and stored at *LINEPTR (not including the
 672    NUL terminator), or -1 on error or EOF.  */
 673 # if @REPLACE_GETDELIM@
 674 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 675 #   undef getdelim
 676 #   define getdelim rpl_getdelim
 677 #  endif
 678 _GL_FUNCDECL_RPL (getdelim, ssize_t,
 679                   (char **lineptr, size_t *linesize, int delimiter,
 680                    FILE *stream)
 681                   _GL_ARG_NONNULL ((1, 2, 4)));
 682 _GL_CXXALIAS_RPL (getdelim, ssize_t,
 683                   (char **lineptr, size_t *linesize, int delimiter,
 684                    FILE *stream));
 685 # else
 686 #  if !@HAVE_DECL_GETDELIM@
 687 _GL_FUNCDECL_SYS (getdelim, ssize_t,
 688                   (char **lineptr, size_t *linesize, int delimiter,
 689                    FILE *stream)
 690                   _GL_ARG_NONNULL ((1, 2, 4)));
 691 #  endif
 692 _GL_CXXALIAS_SYS (getdelim, ssize_t,
 693                   (char **lineptr, size_t *linesize, int delimiter,
 694                    FILE *stream));
 695 # endif
 696 _GL_CXXALIASWARN (getdelim);
 697 #elif defined GNULIB_POSIXCHECK
 698 # undef getdelim
 699 # if HAVE_RAW_DECL_GETDELIM
 700 _GL_WARN_ON_USE (getdelim, "getdelim is unportable - "
 701                  "use gnulib module getdelim for portability");
 702 # endif
 703 #endif
 704
 705 #if @GNULIB_GETLINE@
 706 /* Read a line, up to (and including) the next newline, from STREAM, store it
 707    in *LINEPTR (and NUL-terminate it).
 708    *LINEPTR is a pointer returned from malloc (or NULL), pointing to *LINESIZE
 709    bytes of space.  It is realloc'd as necessary.
 710    Return the number of bytes read and stored at *LINEPTR (not including the
 711    NUL terminator), or -1 on error or EOF.  */
 712 # if @REPLACE_GETLINE@
 713 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 714 #   undef getline
 715 #   define getline rpl_getline
 716 #  endif
 717 _GL_FUNCDECL_RPL (getline, ssize_t,
 718                   (char **lineptr, size_t *linesize, FILE *stream)
 719                   _GL_ARG_NONNULL ((1, 2, 3)));
 720 _GL_CXXALIAS_RPL (getline, ssize_t,
 721                   (char **lineptr, size_t *linesize, FILE *stream));
 722 # else
 723 #  if !@HAVE_DECL_GETLINE@
 724 _GL_FUNCDECL_SYS (getline, ssize_t,
 725                   (char **lineptr, size_t *linesize, FILE *stream)
 726                   _GL_ARG_NONNULL ((1, 2, 3)));
 727 #  endif
 728 _GL_CXXALIAS_SYS (getline, ssize_t,
 729                   (char **lineptr, size_t *linesize, FILE *stream));
 730 # endif
 731 # if @HAVE_DECL_GETLINE@
 732 _GL_CXXALIASWARN (getline);
 733 # endif
 734 #elif defined GNULIB_POSIXCHECK
 735 # undef getline
 736 # if HAVE_RAW_DECL_GETLINE
 737 _GL_WARN_ON_USE (getline, "getline is unportable - "
 738                  "use gnulib module getline for portability");
 739 # endif
 740 #endif
 741
 742 /* It is very rare that the developer ever has full control of stdin,
 743    so any use of gets warrants an unconditional warning; besides, C11
 744    removed it.  */
 745 #undef gets
 746 #if HAVE_RAW_DECL_GETS && !defined __cplusplus
 747 _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
 748 #endif
 749
 750 #if @GNULIB_OBSTACK_PRINTF@ || @GNULIB_OBSTACK_PRINTF_POSIX@
 751 struct obstack;
 752 /* Grow an obstack with formatted output.  Return the number of
 753    bytes added to OBS.  No trailing nul byte is added, and the
 754    object should be closed with obstack_finish before use.  Upon
 755    memory allocation error, call obstack_alloc_failed_handler.  Upon
 756    other error, return -1.  */
 757 # if @REPLACE_OBSTACK_PRINTF@
 758 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 759 #   define obstack_printf rpl_obstack_printf
 760 #  endif
 761 _GL_FUNCDECL_RPL (obstack_printf, int,
 762                   (struct obstack *obs, const char *format, ...)
 763                   _GL_ATTRIBUTE_FORMAT_PRINTF (2, 3)
 764                   _GL_ARG_NONNULL ((1, 2)));
 765 _GL_CXXALIAS_RPL (obstack_printf, int,
 766                   (struct obstack *obs, const char *format, ...));
 767 # else
 768 #  if !@HAVE_DECL_OBSTACK_PRINTF@
 769 _GL_FUNCDECL_SYS (obstack_printf, int,
 770                   (struct obstack *obs, const char *format, ...)
 771                   _GL_ATTRIBUTE_FORMAT_PRINTF (2, 3)
 772                   _GL_ARG_NONNULL ((1, 2)));
 773 #  endif
 774 _GL_CXXALIAS_SYS (obstack_printf, int,
 775                   (struct obstack *obs, const char *format, ...));
 776 # endif
 777 _GL_CXXALIASWARN (obstack_printf);
 778 # if @REPLACE_OBSTACK_PRINTF@
 779 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 780 #   define obstack_vprintf rpl_obstack_vprintf
 781 #  endif
 782 _GL_FUNCDECL_RPL (obstack_vprintf, int,
 783                   (struct obstack *obs, const char *format, va_list args)
 784                   _GL_ATTRIBUTE_FORMAT_PRINTF (2, 0)
 785                   _GL_ARG_NONNULL ((1, 2)));
 786 _GL_CXXALIAS_RPL (obstack_vprintf, int,
 787                   (struct obstack *obs, const char *format, va_list args));
 788 # else
 789 #  if !@HAVE_DECL_OBSTACK_PRINTF@
 790 _GL_FUNCDECL_SYS (obstack_vprintf, int,
 791                   (struct obstack *obs, const char *format, va_list args)
 792                   _GL_ATTRIBUTE_FORMAT_PRINTF (2, 0)
 793                   _GL_ARG_NONNULL ((1, 2)));
 794 #  endif
 795 _GL_CXXALIAS_SYS (obstack_vprintf, int,
 796                   (struct obstack *obs, const char *format, va_list args));
 797 # endif
 798 _GL_CXXALIASWARN (obstack_vprintf);
 799 #endif
 800
 801 #if @GNULIB_PCLOSE@
 802 # if !@HAVE_PCLOSE@
 803 _GL_FUNCDECL_SYS (pclose, int, (FILE *stream) _GL_ARG_NONNULL ((1)));
 804 # endif
 805 _GL_CXXALIAS_SYS (pclose, int, (FILE *stream));
 806 _GL_CXXALIASWARN (pclose);
 807 #elif defined GNULIB_POSIXCHECK
 808 # undef pclose
 809 # if HAVE_RAW_DECL_PCLOSE
 810 _GL_WARN_ON_USE (pclose, "pclose is unportable - "
 811                  "use gnulib module pclose for more portability");
 812 # endif
 813 #endif
 814
 815 #if @GNULIB_PERROR@
 816 /* Print a message to standard error, describing the value of ERRNO,
 817    (if STRING is not NULL and not empty) prefixed with STRING and ": ",
 818    and terminated with a newline.  */
 819 # if @REPLACE_PERROR@
 820 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 821 #   define perror rpl_perror
 822 #  endif
 823 _GL_FUNCDECL_RPL (perror, void, (const char *string));
 824 _GL_CXXALIAS_RPL (perror, void, (const char *string));
 825 # else
 826 _GL_CXXALIAS_SYS (perror, void, (const char *string));
 827 # endif
 828 _GL_CXXALIASWARN (perror);
 829 #elif defined GNULIB_POSIXCHECK
 830 # undef perror
 831 /* Assume perror is always declared.  */
 832 _GL_WARN_ON_USE (perror, "perror is not always POSIX compliant - "
 833                  "use gnulib module perror for portability");
 834 #endif
 835
 836 #if @GNULIB_POPEN@
 837 # if @REPLACE_POPEN@
 838 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 839 #   undef popen
 840 #   define popen rpl_popen
 841 #  endif
 842 _GL_FUNCDECL_RPL (popen, FILE *, (const char *cmd, const char *mode)
 843                                  _GL_ARG_NONNULL ((1, 2)));
 844 _GL_CXXALIAS_RPL (popen, FILE *, (const char *cmd, const char *mode));
 845 # else
 846 #  if !@HAVE_POPEN@
 847 _GL_FUNCDECL_SYS (popen, FILE *, (const char *cmd, const char *mode)
 848                                  _GL_ARG_NONNULL ((1, 2)));
 849 #  endif
 850 _GL_CXXALIAS_SYS (popen, FILE *, (const char *cmd, const char *mode));
 851 # endif
 852 _GL_CXXALIASWARN (popen);
 853 #elif defined GNULIB_POSIXCHECK
 854 # undef popen
 855 # if HAVE_RAW_DECL_POPEN
 856 _GL_WARN_ON_USE (popen, "popen is buggy on some platforms - "
 857                  "use gnulib module popen or pipe for more portability");
 858 # endif
 859 #endif
 860
 861 #if @GNULIB_PRINTF_POSIX@ || @GNULIB_PRINTF@
 862 # if (@GNULIB_PRINTF_POSIX@ && @REPLACE_PRINTF@) \
 863      || (@GNULIB_PRINTF@ && @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@))
 864 #  if defined __GNUC__
 865 #   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 866 /* Don't break __attribute__((format(printf,M,N))).  */
 867 #    define printf __printf__
 868 #   endif
 869 #   if @GNULIB_PRINTF_POSIX@ || @GNULIB_VFPRINTF_POSIX@
 870 _GL_FUNCDECL_RPL_1 (__printf__, int,
 871                     (const char *format, ...)
 872                     __asm__ (@ASM_SYMBOL_PREFIX@
 873                              _GL_STDIO_MACROEXPAND_AND_STRINGIZE(rpl_printf))
 874                     _GL_ATTRIBUTE_FORMAT_PRINTF (1, 2)
 875                     _GL_ARG_NONNULL ((1)));
 876 #   else
 877 _GL_FUNCDECL_RPL_1 (__printf__, int,
 878                     (const char *format, ...)
 879                     __asm__ (@ASM_SYMBOL_PREFIX@
 880                              _GL_STDIO_MACROEXPAND_AND_STRINGIZE(rpl_printf))
 881                     _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM (1, 2)
 882                     _GL_ARG_NONNULL ((1)));
 883 #   endif
 884 _GL_CXXALIAS_RPL_1 (printf, __printf__, int, (const char *format, ...));
 885 #  else
 886 #   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 887 #    define printf rpl_printf
 888 #   endif
 889 _GL_FUNCDECL_RPL (printf, int,
 890                   (const char *format, ...)
 891                   _GL_ATTRIBUTE_FORMAT_PRINTF (1, 2)
 892                   _GL_ARG_NONNULL ((1)));
 893 _GL_CXXALIAS_RPL (printf, int, (const char *format, ...));
 894 #  endif
 895 #  define GNULIB_overrides_printf 1
 896 # else
 897 _GL_CXXALIAS_SYS (printf, int, (const char *format, ...));
 898 # endif
 899 _GL_CXXALIASWARN (printf);
 900 #endif
 901 #if !@GNULIB_PRINTF_POSIX@ && defined GNULIB_POSIXCHECK
 902 # if !GNULIB_overrides_printf
 903 #  undef printf
 904 # endif
 905 /* Assume printf is always declared.  */
 906 _GL_WARN_ON_USE (printf, "printf is not always POSIX compliant - "
 907                  "use gnulib module printf-posix for portable "
 908                  "POSIX compliance");
 909 #endif
 910
 911 #if @GNULIB_PUTC@
 912 # if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
 913 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 914 #   undef putc
 915 #   define putc rpl_fputc
 916 #  endif
 917 _GL_FUNCDECL_RPL (fputc, int, (int c, FILE *stream) _GL_ARG_NONNULL ((2)));
 918 _GL_CXXALIAS_RPL_1 (putc, rpl_fputc, int, (int c, FILE *stream));
 919 # else
 920 _GL_CXXALIAS_SYS (putc, int, (int c, FILE *stream));
 921 # endif
 922 _GL_CXXALIASWARN (putc);
 923 #endif
 924
 925 #if @GNULIB_PUTCHAR@
 926 # if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
 927 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 928 #   undef putchar
 929 #   define putchar rpl_putchar
 930 #  endif
 931 _GL_FUNCDECL_RPL (putchar, int, (int c));
 932 _GL_CXXALIAS_RPL (putchar, int, (int c));
 933 # else
 934 _GL_CXXALIAS_SYS (putchar, int, (int c));
 935 # endif
 936 _GL_CXXALIASWARN (putchar);
 937 #endif
 938
 939 #if @GNULIB_PUTS@
 940 # if @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@)
 941 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 942 #   undef puts
 943 #   define puts rpl_puts
 944 #  endif
 945 _GL_FUNCDECL_RPL (puts, int, (const char *string) _GL_ARG_NONNULL ((1)));
 946 _GL_CXXALIAS_RPL (puts, int, (const char *string));
 947 # else
 948 _GL_CXXALIAS_SYS (puts, int, (const char *string));
 949 # endif
 950 _GL_CXXALIASWARN (puts);
 951 #endif
 952
 953 #if @GNULIB_REMOVE@
 954 # if @REPLACE_REMOVE@
 955 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 956 #   undef remove
 957 #   define remove rpl_remove
 958 #  endif
 959 _GL_FUNCDECL_RPL (remove, int, (const char *name) _GL_ARG_NONNULL ((1)));
 960 _GL_CXXALIAS_RPL (remove, int, (const char *name));
 961 # else
 962 _GL_CXXALIAS_SYS (remove, int, (const char *name));
 963 # endif
 964 _GL_CXXALIASWARN (remove);
 965 #elif defined GNULIB_POSIXCHECK
 966 # undef remove
 967 /* Assume remove is always declared.  */
 968 _GL_WARN_ON_USE (remove, "remove cannot handle directories on some platforms - "
 969                  "use gnulib module remove for more portability");
 970 #endif
 971
 972 #if @GNULIB_RENAME@
 973 # if @REPLACE_RENAME@
 974 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 975 #   undef rename
 976 #   define rename rpl_rename
 977 #  endif
 978 _GL_FUNCDECL_RPL (rename, int,
 979                   (const char *old_filename, const char *new_filename)
 980                   _GL_ARG_NONNULL ((1, 2)));
 981 _GL_CXXALIAS_RPL (rename, int,
 982                   (const char *old_filename, const char *new_filename));
 983 # else
 984 _GL_CXXALIAS_SYS (rename, int,
 985                   (const char *old_filename, const char *new_filename));
 986 # endif
 987 _GL_CXXALIASWARN (rename);
 988 #elif defined GNULIB_POSIXCHECK
 989 # undef rename
 990 /* Assume rename is always declared.  */
 991 _GL_WARN_ON_USE (rename, "rename is buggy on some platforms - "
 992                  "use gnulib module rename for more portability");
 993 #endif
 994
 995 #if @GNULIB_RENAMEAT@
 996 # if @REPLACE_RENAMEAT@
 997 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 998 #   undef renameat
 999 #   define renameat rpl_renameat
1000 #  endif
1001 _GL_FUNCDECL_RPL (renameat, int,
1002                   (int fd1, char const *file1, int fd2, char const *file2)
1003                   _GL_ARG_NONNULL ((2, 4)));
1004 _GL_CXXALIAS_RPL (renameat, int,
1005                   (int fd1, char const *file1, int fd2, char const *file2));
1006 # else
1007 #  if !@HAVE_RENAMEAT@
1008 _GL_FUNCDECL_SYS (renameat, int,
1009                   (int fd1, char const *file1, int fd2, char const *file2)
1010                   _GL_ARG_NONNULL ((2, 4)));
1011 #  endif
1012 _GL_CXXALIAS_SYS (renameat, int,
1013                   (int fd1, char const *file1, int fd2, char const *file2));
1014 # endif
1015 _GL_CXXALIASWARN (renameat);
1016 #elif defined GNULIB_POSIXCHECK
1017 # undef renameat
1018 # if HAVE_RAW_DECL_RENAMEAT
1019 _GL_WARN_ON_USE (renameat, "renameat is not portable - "
1020                  "use gnulib module renameat for portability");
1021 # endif
1022 #endif
1023
1024 #if @GNULIB_SCANF@
1025 # if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
1026 #  if defined __GNUC__
1027 #   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1028 #    undef scanf
1029 /* Don't break __attribute__((format(scanf,M,N))).  */
1030 #    define scanf __scanf__
1031 #   endif
1032 _GL_FUNCDECL_RPL_1 (__scanf__, int,
1033                     (const char *format, ...)
1034                     __asm__ (@ASM_SYMBOL_PREFIX@
1035                              _GL_STDIO_MACROEXPAND_AND_STRINGIZE(rpl_scanf))
1036                     _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM (1, 2)
1037                     _GL_ARG_NONNULL ((1)));
1038 _GL_CXXALIAS_RPL_1 (scanf, __scanf__, int, (const char *format, ...));
1039 #  else
1040 #   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1041 #    undef scanf
1042 #    define scanf rpl_scanf
1043 #   endif
1044 _GL_FUNCDECL_RPL (scanf, int, (const char *format, ...)
1045                               _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM (1, 2)
1046                               _GL_ARG_NONNULL ((1)));
1047 _GL_CXXALIAS_RPL (scanf, int, (const char *format, ...));
1048 #  endif
1049 # else
1050 _GL_CXXALIAS_SYS (scanf, int, (const char *format, ...));
1051 # endif
1052 _GL_CXXALIASWARN (scanf);
1053 #endif
1054
1055 #if @GNULIB_SNPRINTF@
1056 # if @REPLACE_SNPRINTF@
1057 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1058 #   define snprintf rpl_snprintf
1059 #  endif
1060 _GL_FUNCDECL_RPL (snprintf, int,
1061                   (char *str, size_t size, const char *format, ...)
1062                   _GL_ATTRIBUTE_FORMAT_PRINTF (3, 4)
1063                   _GL_ARG_NONNULL ((3)));
1064 _GL_CXXALIAS_RPL (snprintf, int,
1065                   (char *str, size_t size, const char *format, ...));
1066 # else
1067 #  if !@HAVE_DECL_SNPRINTF@
1068 _GL_FUNCDECL_SYS (snprintf, int,
1069                   (char *str, size_t size, const char *format, ...)
1070                   _GL_ATTRIBUTE_FORMAT_PRINTF (3, 4)
1071                   _GL_ARG_NONNULL ((3)));
1072 #  endif
1073 _GL_CXXALIAS_SYS (snprintf, int,
1074                   (char *str, size_t size, const char *format, ...));
1075 # endif
1076 _GL_CXXALIASWARN (snprintf);
1077 #elif defined GNULIB_POSIXCHECK
1078 # undef snprintf
1079 # if HAVE_RAW_DECL_SNPRINTF
1080 _GL_WARN_ON_USE (snprintf, "snprintf is unportable - "
1081                  "use gnulib module snprintf for portability");
1082 # endif
1083 #endif
1084
1085 /* Some people would argue that all sprintf uses should be warned about
1086    (for example, OpenBSD issues a link warning for it),
1087    since it can cause security holes due to buffer overruns.
1088    However, we believe that sprintf can be used safely, and is more
1089    efficient than snprintf in those safe cases; and as proof of our
1090    belief, we use sprintf in several gnulib modules.  So this header
1091    intentionally avoids adding a warning to sprintf except when
1092    GNULIB_POSIXCHECK is defined.  */
1093
1094 #if @GNULIB_SPRINTF_POSIX@
1095 # if @REPLACE_SPRINTF@
1096 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1097 #   define sprintf rpl_sprintf
1098 #  endif
1099 _GL_FUNCDECL_RPL (sprintf, int, (char *str, const char *format, ...)
1100                                 _GL_ATTRIBUTE_FORMAT_PRINTF (2, 3)
1101                                 _GL_ARG_NONNULL ((1, 2)));
1102 _GL_CXXALIAS_RPL (sprintf, int, (char *str, const char *format, ...));
1103 # else
1104 _GL_CXXALIAS_SYS (sprintf, int, (char *str, const char *format, ...));
1105 # endif
1106 _GL_CXXALIASWARN (sprintf);
1107 #elif defined GNULIB_POSIXCHECK
1108 # undef sprintf
1109 /* Assume sprintf is always declared.  */
1110 _GL_WARN_ON_USE (sprintf, "sprintf is not always POSIX compliant - "
1111                  "use gnulib module sprintf-posix for portable "
1112                  "POSIX compliance");
1113 #endif
1114
1115 #if @GNULIB_TMPFILE@
1116 # if @REPLACE_TMPFILE@
1117 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1118 #   define tmpfile rpl_tmpfile
1119 #  endif
1120 _GL_FUNCDECL_RPL (tmpfile, FILE *, (void));
1121 _GL_CXXALIAS_RPL (tmpfile, FILE *, (void));
1122 # else
1123 _GL_CXXALIAS_SYS (tmpfile, FILE *, (void));
1124 # endif
1125 _GL_CXXALIASWARN (tmpfile);
1126 #elif defined GNULIB_POSIXCHECK
1127 # undef tmpfile
1128 # if HAVE_RAW_DECL_TMPFILE
1129 _GL_WARN_ON_USE (tmpfile, "tmpfile is not usable on mingw - "
1130                  "use gnulib module tmpfile for portability");
1131 # endif
1132 #endif
1133
1134 #if @GNULIB_VASPRINTF@
1135 /* Write formatted output to a string dynamically allocated with malloc().
1136    If the memory allocation succeeds, store the address of the string in
1137    *RESULT and return the number of resulting bytes, excluding the trailing
1138    NUL.  Upon memory allocation error, or some other error, return -1.  */
1139 # if @REPLACE_VASPRINTF@
1140 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1141 #   define asprintf rpl_asprintf
1142 #  endif
1143 _GL_FUNCDECL_RPL (asprintf, int,
1144                   (char **result, const char *format, ...)
1145                   _GL_ATTRIBUTE_FORMAT_PRINTF (2, 3)
1146                   _GL_ARG_NONNULL ((1, 2)));
1147 _GL_CXXALIAS_RPL (asprintf, int,
1148                   (char **result, const char *format, ...));
1149 # else
1150 #  if !@HAVE_VASPRINTF@
1151 _GL_FUNCDECL_SYS (asprintf, int,
1152                   (char **result, const char *format, ...)
1153                   _GL_ATTRIBUTE_FORMAT_PRINTF (2, 3)
1154                   _GL_ARG_NONNULL ((1, 2)));
1155 #  endif
1156 _GL_CXXALIAS_SYS (asprintf, int,
1157                   (char **result, const char *format, ...));
1158 # endif
1159 _GL_CXXALIASWARN (asprintf);
1160 # if @REPLACE_VASPRINTF@
1161 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1162 #   define vasprintf rpl_vasprintf
1163 #  endif
1164 _GL_FUNCDECL_RPL (vasprintf, int,
1165                   (char **result, const char *format, va_list args)
1166                   _GL_ATTRIBUTE_FORMAT_PRINTF (2, 0)
1167                   _GL_ARG_NONNULL ((1, 2)));
1168 _GL_CXXALIAS_RPL (vasprintf, int,
1169                   (char **result, const char *format, va_list args));
1170 # else
1171 #  if !@HAVE_VASPRINTF@
1172 _GL_FUNCDECL_SYS (vasprintf, int,
1173                   (char **result, const char *format, va_list args)
1174                   _GL_ATTRIBUTE_FORMAT_PRINTF (2, 0)
1175                   _GL_ARG_NONNULL ((1, 2)));
1176 #  endif
1177 _GL_CXXALIAS_SYS (vasprintf, int,
1178                   (char **result, const char *format, va_list args));
1179 # endif
1180 _GL_CXXALIASWARN (vasprintf);
1181 #endif
1182
1183 #if @GNULIB_VDPRINTF@
1184 # if @REPLACE_VDPRINTF@
1185 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1186 #   define vdprintf rpl_vdprintf
1187 #  endif
1188 _GL_FUNCDECL_RPL (vdprintf, int, (int fd, const char *format, va_list args)
1189                                  _GL_ATTRIBUTE_FORMAT_PRINTF (2, 0)
1190                                  _GL_ARG_NONNULL ((2)));
1191 _GL_CXXALIAS_RPL (vdprintf, int, (int fd, const char *format, va_list args));
1192 # else
1193 #  if !@HAVE_VDPRINTF@
1194 _GL_FUNCDECL_SYS (vdprintf, int, (int fd, const char *format, va_list args)
1195                                  _GL_ATTRIBUTE_FORMAT_PRINTF (2, 0)
1196                                  _GL_ARG_NONNULL ((2)));
1197 #  endif
1198 /* Need to cast, because on Solaris, the third parameter will likely be
1199                                                     __va_list args.  */
1200 _GL_CXXALIAS_SYS_CAST (vdprintf, int,
1201                        (int fd, const char *format, va_list args));
1202 # endif
1203 _GL_CXXALIASWARN (vdprintf);
1204 #elif defined GNULIB_POSIXCHECK
1205 # undef vdprintf
1206 # if HAVE_RAW_DECL_VDPRINTF
1207 _GL_WARN_ON_USE (vdprintf, "vdprintf is unportable - "
1208                  "use gnulib module vdprintf for portability");
1209 # endif
1210 #endif
1211
1212 #if @GNULIB_VFPRINTF_POSIX@ || @GNULIB_VFPRINTF@
1213 # if (@GNULIB_VFPRINTF_POSIX@ && @REPLACE_VFPRINTF@) \
1214      || (@GNULIB_VFPRINTF@ && @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@))
1215 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1216 #   define vfprintf rpl_vfprintf
1217 #  endif
1218 #  define GNULIB_overrides_vfprintf 1
1219 #  if @GNULIB_VFPRINTF_POSIX@
1220 _GL_FUNCDECL_RPL (vfprintf, int, (FILE *fp, const char *format, va_list args)
1221                                  _GL_ATTRIBUTE_FORMAT_PRINTF (2, 0)
1222                                  _GL_ARG_NONNULL ((1, 2)));
1223 #  else
1224 _GL_FUNCDECL_RPL (vfprintf, int, (FILE *fp, const char *format, va_list args)
1225                                  _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM (2, 0)
1226                                  _GL_ARG_NONNULL ((1, 2)));
1227 #  endif
1228 _GL_CXXALIAS_RPL (vfprintf, int, (FILE *fp, const char *format, va_list args));
1229 # else
1230 /* Need to cast, because on Solaris, the third parameter is
1231                                                       __va_list args
1232    and GCC's fixincludes did not change this to __gnuc_va_list.  */
1233 _GL_CXXALIAS_SYS_CAST (vfprintf, int,
1234                        (FILE *fp, const char *format, va_list args));
1235 # endif
1236 _GL_CXXALIASWARN (vfprintf);
1237 #endif
1238 #if !@GNULIB_VFPRINTF_POSIX@ && defined GNULIB_POSIXCHECK
1239 # if !GNULIB_overrides_vfprintf
1240 #  undef vfprintf
1241 # endif
1242 /* Assume vfprintf is always declared.  */
1243 _GL_WARN_ON_USE (vfprintf, "vfprintf is not always POSIX compliant - "
1244                  "use gnulib module vfprintf-posix for portable "
1245                       "POSIX compliance");
1246 #endif
1247
1248 #if @GNULIB_VFSCANF@
1249 # if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
1250 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1251 #   undef vfscanf
1252 #   define vfscanf rpl_vfscanf
1253 #  endif
1254 _GL_FUNCDECL_RPL (vfscanf, int,
1255                   (FILE *stream, const char *format, va_list args)
1256                   _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM (2, 0)
1257                   _GL_ARG_NONNULL ((1, 2)));
1258 _GL_CXXALIAS_RPL (vfscanf, int,
1259                   (FILE *stream, const char *format, va_list args));
1260 # else
1261 _GL_CXXALIAS_SYS (vfscanf, int,
1262                   (FILE *stream, const char *format, va_list args));
1263 # endif
1264 _GL_CXXALIASWARN (vfscanf);
1265 #endif
1266
1267 #if @GNULIB_VPRINTF_POSIX@ || @GNULIB_VPRINTF@
1268 # if (@GNULIB_VPRINTF_POSIX@ && @REPLACE_VPRINTF@) \
1269      || (@GNULIB_VPRINTF@ && @REPLACE_STDIO_WRITE_FUNCS@ && (@GNULIB_STDIO_H_NONBLOCKING@ || @GNULIB_STDIO_H_SIGPIPE@))
1270 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1271 #   define vprintf rpl_vprintf
1272 #  endif
1273 #  define GNULIB_overrides_vprintf 1
1274 #  if @GNULIB_VPRINTF_POSIX@ || @GNULIB_VFPRINTF_POSIX@
1275 _GL_FUNCDECL_RPL (vprintf, int, (const char *format, va_list args)
1276                                 _GL_ATTRIBUTE_FORMAT_PRINTF (1, 0)
1277                                 _GL_ARG_NONNULL ((1)));
1278 #  else
1279 _GL_FUNCDECL_RPL (vprintf, int, (const char *format, va_list args)
1280                                 _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM (1, 0)
1281                                 _GL_ARG_NONNULL ((1)));
1282 #  endif
1283 _GL_CXXALIAS_RPL (vprintf, int, (const char *format, va_list args));
1284 # else
1285 /* Need to cast, because on Solaris, the second parameter is
1286                                                           __va_list args
1287    and GCC's fixincludes did not change this to __gnuc_va_list.  */
1288 _GL_CXXALIAS_SYS_CAST (vprintf, int, (const char *format, va_list args));
1289 # endif
1290 _GL_CXXALIASWARN (vprintf);
1291 #endif
1292 #if !@GNULIB_VPRINTF_POSIX@ && defined GNULIB_POSIXCHECK
1293 # if !GNULIB_overrides_vprintf
1294 #  undef vprintf
1295 # endif
1296 /* Assume vprintf is always declared.  */
1297 _GL_WARN_ON_USE (vprintf, "vprintf is not always POSIX compliant - "
1298                  "use gnulib module vprintf-posix for portable "
1299                  "POSIX compliance");
1300 #endif
1301
1302 #if @GNULIB_VSCANF@
1303 # if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
1304 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1305 #   undef vscanf
1306 #   define vscanf rpl_vscanf
1307 #  endif
1308 _GL_FUNCDECL_RPL (vscanf, int, (const char *format, va_list args)
1309                                _GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM (1, 0)
1310                                _GL_ARG_NONNULL ((1)));
1311 _GL_CXXALIAS_RPL (vscanf, int, (const char *format, va_list args));
1312 # else
1313 _GL_CXXALIAS_SYS (vscanf, int, (const char *format, va_list args));
1314 # endif
1315 _GL_CXXALIASWARN (vscanf);
1316 #endif
1317
1318 #if @GNULIB_VSNPRINTF@
1319 # if @REPLACE_VSNPRINTF@
1320 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1321 #   define vsnprintf rpl_vsnprintf
1322 #  endif
1323 _GL_FUNCDECL_RPL (vsnprintf, int,
1324                   (char *str, size_t size, const char *format, va_list args)
1325                   _GL_ATTRIBUTE_FORMAT_PRINTF (3, 0)
1326                   _GL_ARG_NONNULL ((3)));
1327 _GL_CXXALIAS_RPL (vsnprintf, int,
1328                   (char *str, size_t size, const char *format, va_list args));
1329 # else
1330 #  if !@HAVE_DECL_VSNPRINTF@
1331 _GL_FUNCDECL_SYS (vsnprintf, int,
1332                   (char *str, size_t size, const char *format, va_list args)
1333                   _GL_ATTRIBUTE_FORMAT_PRINTF (3, 0)
1334                   _GL_ARG_NONNULL ((3)));
1335 #  endif
1336 _GL_CXXALIAS_SYS (vsnprintf, int,
1337                   (char *str, size_t size, const char *format, va_list args));
1338 # endif
1339 _GL_CXXALIASWARN (vsnprintf);
1340 #elif defined GNULIB_POSIXCHECK
1341 # undef vsnprintf
1342 # if HAVE_RAW_DECL_VSNPRINTF
1343 _GL_WARN_ON_USE (vsnprintf, "vsnprintf is unportable - "
1344                  "use gnulib module vsnprintf for portability");
1345 # endif
1346 #endif
1347
1348 #if @GNULIB_VSPRINTF_POSIX@
1349 # if @REPLACE_VSPRINTF@
1350 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1351 #   define vsprintf rpl_vsprintf
1352 #  endif
1353 _GL_FUNCDECL_RPL (vsprintf, int,
1354                   (char *str, const char *format, va_list args)
1355                   _GL_ATTRIBUTE_FORMAT_PRINTF (2, 0)
1356                   _GL_ARG_NONNULL ((1, 2)));
1357 _GL_CXXALIAS_RPL (vsprintf, int,
1358                   (char *str, const char *format, va_list args));
1359 # else
1360 /* Need to cast, because on Solaris, the third parameter is
1361                                                        __va_list args
1362    and GCC's fixincludes did not change this to __gnuc_va_list.  */
1363 _GL_CXXALIAS_SYS_CAST (vsprintf, int,
1364                        (char *str, const char *format, va_list args));
1365 # endif
1366 _GL_CXXALIASWARN (vsprintf);
1367 #elif defined GNULIB_POSIXCHECK
1368 # undef vsprintf
1369 /* Assume vsprintf is always declared.  */
1370 _GL_WARN_ON_USE (vsprintf, "vsprintf is not always POSIX compliant - "
1371                  "use gnulib module vsprintf-posix for portable "
1372                       "POSIX compliance");
1373 #endif
1374
1375 #endif /* _@GUARD_PREFIX@_STDIO_H */
1376 #endif /* _@GUARD_PREFIX@_STDIO_H */
1377 #endif