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Bruno Haible
c36a0f21b3
* doc/Makefile (undocumented-modules.texi): New rule. (%.info, %.html, %.dvi, %.pdf): Depend on undocumented-modules.texi. (mostlyclean): Remove also *.m and *.tmp. (force): New rule. * doc/*.texi: Add module index entries. * doc/*/*.texi: Likewise.
46 lines
1.4 KiB
Plaintext
46 lines
1.4 KiB
Plaintext
@node freopen
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@subsection @code{freopen}
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@findex freopen
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POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/freopen.html}
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Gnulib module: freopen
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@mindex freopen
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Portability problems fixed by Gnulib:
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@itemize
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@item
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On some platforms, if @code{stream} does not already have an open
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file descriptor, @code{freopen} returns the stream without opening
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the file: glibc 2.24.
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@item
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On platforms where @code{off_t} is a 32-bit type, @code{freopen} may not work
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correctly with files 2 GiB and larger. @xref{Large File Support}.
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@item
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On Windows platforms (excluding Cygwin), this function does usually not
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recognize the @file{/dev/null} filename.
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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On Windows platforms (excluding Cygwin), this function does not set @code{errno}
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upon failure.
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@item
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This function does not support a @code{NULL} file name argument on some
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platforms:
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OpenBSD 4.9, AIX 7.1, HP-UX 11.23, Solaris 10, mingw, MSVC 14.
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@item
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This function does not fail when the file name argument ends in a slash
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and (without the slash) names a nonexistent file or a file that is not a
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directory, on some platforms:
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HP-UX 11.00, Solaris 9.
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@item
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Applications should not assume that @code{fileno(f)} will be the same
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before and after a call to @code{freopen(name,mode,f)}.
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@mindex freopen-safer
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However, the
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module @code{freopen-safer} can at least protect @code{stdin}, @code{stdout},
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and @code{stderr}.
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@end itemize
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