kc3-lang/gnulib/doc/posix-functions/fopen.texi

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• Hash : 79c4db53
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  Date : 2021-03-21T14:56:02
  

  doc: Update for macOS 11.1.
  
  * doc/posix-headers/*.texi: Update.
  * doc/glibc-headers/*.texi: Update.
  * doc/posix-functions/*.texi: Likewise.
  * doc/pastposix-functions/*.texi: Likewise.
  * doc/glibc-functions/*.texi: Likewise.
  * m4/aligned_alloc.m4 (gl_FUNC_ALIGNED_ALLOC): Update cross-compilation
  guess.
  

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• doc/posix-functions/fopen.texi

• @node fopen
  @section @code{fopen}
  @findex fopen
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html}
  
  Gnulib module: fopen or fopen-gnu
  
  Portability problems fixed by either Gnulib module @code{fopen} or @code{fopen-gnu}:
  @itemize
  @item
  This function does not fail when the file name argument ends in a slash
  and (without the slash) names a nonexistent file or a file that is not a
  directory, on some platforms:
  HP-UX 11.00, AIX 7.1, Solaris 9.
  @item
  On platforms where @code{off_t} is a 32-bit type, @code{fopen} may not work
  correctly with files larger than 2 GB@.  (Cf. @code{AC_SYS_LARGEFILE}.)
  @item
  On Windows platforms (excluding Cygwin), this function does usually not
  recognize the @file{/dev/null} filename.
  @end itemize
  
  Portability problems fixed by Gnulib module @code{fopen-gnu}:
  @itemize
  @item
  This function does not support the mode character
  @samp{x} (corresponding to @code{O_EXCL}), introduced in ISO C11,
  on some platforms:
  FreeBSD 8.2, NetBSD 6.1, OpenBSD 5.6, Minix 3.2, AIX 6.1, HP-UX 11.31, IRIX 6.5, Solaris 11.3, Cygwin 1.7.16 (2012), mingw, MSVC 14.
  @item
  This function does not support the mode character
  @samp{e} (corresponding to @code{O_CLOEXEC}),
  introduced into a future POSIX revision through
  @url{https://www.austingroupbugs.net/view.php?id=411}, on some platforms:
  glibc 2.6, macOS 11.1, FreeBSD 9.0, NetBSD 5.1, OpenBSD 5.6, Minix 3.2, AIX 7.2, HP-UX 11.31, IRIX 6.5, Solaris 11.3, Cygwin 1.7.16 (2012), mingw, MSVC 14.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  On Windows platforms (excluding Cygwin), this function does not set @code{errno}
  upon failure.
  @item
  On Windows, this function returns a file stream in ``text'' mode by default;
  this means that it translates @code{'\n'} to CR/LF by default.  Use the
  @code{"b"} flag if you need reliable binary I/O.
  @item
  On Windows platforms (excluding Cygwin), this function fails to open
  directories for reading.  Such streams have implementation-defined
  semantics on other platforms.  To avoid directory streams with a
  consistent error message, use @code{fstat} after @code{open} and
  @code{fdopen}, rather than @code{fopen} and @code{fileno}.
  @end itemize
  

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