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annotate doc/posix-functions/fopen.texi @ 10472:a4dc39a18d54

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Ensure that a filename ending in a slash cannot be used to access a non-directory.
author Bruno Haible <bruno@clisp.org>
date Wed, 24 Sep 2008 13:50:02 +0200
parents 76082cdf54ba
children 541a421c693f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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070329237839 Rename two directories: headers -> posix-headers, functions -> posix-functions.
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1 @node fopen
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2 @section @code{fopen}
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3 @findex fopen
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4
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5 POSIX specification: @url{http://www.opengroup.org/susv3xsh/fopen.html}
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6
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7 Gnulib module: fopen
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8
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9 Portability problems fixed by Gnulib:
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10 @itemize
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11 @item
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12 This function does not fail when the file name argument ends in a slash
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13 and (without the slash) names a nonexistent file or a file that is not a
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14 directory, on some platforms:
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15 HP-UX 11.00, Solaris 9.
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16 @item
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17 On Windows platforms (excluding Cygwin), this function does usually not
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18 recognize the @file{/dev/null} filename.
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19 @end itemize
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20
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21 Portability problems not fixed by Gnulib:
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22 @itemize
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23 @item
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24 On Windows platforms (excluding Cygwin), this function does not set @code{errno}
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25 upon failure.
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26 @item
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27 On Windows, this function returns a file stream in ``text'' mode by default;
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28 this means that it translates @code{'\n'} to CR/LF by default. Use the
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29 @code{"b"} flag if you need reliable binary I/O.
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30 @item
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31 On Windows platforms (excluding Cygwin), this function fails to open
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32 directories for reading. Such streams have implementation-defined
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33 semantics on other platforms. To avoid directory streams with a
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34 consistent error message, use @code{fstat} after @code{open} and
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35 @code{fdopen}, rather than @code{fopen} and @code{fileno}.
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36 @end itemize