kc3-lang/gnulib/doc/posix-functions/dup2.texi

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• Hash : 8fb59b8f
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  Date : 2017-07-06T01:10:39
  

  doc: Update for MSVC 14.
  
  * doc/posix-headers/*.texi: Add info about MSVC 14.
  * doc/posix-functions/*.texi: Likewise.
  * doc/pastposix-functions/*.texi: Likewise.
  * doc/glibc-headers/*.texi: Likewise.
  * doc/glibc-functions/*.texi: Likewise.
  

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• doc/posix-functions/dup2.texi

• @node dup2
  @section @code{dup2}
  @findex dup2
  
  POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/dup2.html}
  
  Gnulib module: dup2 or dup2-obsolete
  
  Portability problems fixed by either Gnulib module @code{dup2} or @code{dup2-obsolete}:
  @itemize
  @item
  This function always returns 0 for success on some platforms:
  mingw, MSVC 14.
  
  @item
  This function can hang when duplicating an fd to itself on some platforms:
  mingw, MSVC 14.
  
  @item
  This function crashes when invoked with invalid arguments on some platforms:
  Cygwin 1.7.17, MSVC 14.
  
  @item
  This function crashes when invoked with valid arguments on some platforms:
  Cygwin 1.7.25.
  
  @item
  This function fails with @code{EINVAL} when duplicating an fd to itself:
  Android.
  
  @item
  This function resets the @code{FD_CLOEXEC} flag when duplicating an fd
  to itself on some platforms:
  Haiku.
  
  @item
  This function returns 0 for @code{dup2 (1, 1)} on some platforms:
  Cygwin 1.5.x.
  
  @item
  This function may return @code{-EBADF} instead of @code{-1} on some platforms:
  Linux releases between July 2008 and May 2009 (versions 2.6.27 to 2.6.29).
  
  @item
  This function returns @code{EMFILE} instead of @code{EBADF} for
  large targets, which interferes with using
  @code{dup2(fd,fd)==fd)} as the minimal @code{EBADF} filter:
  AIX 7.1, FreeBSD 6.1, Cygwin 1.5.
  @end itemize
  
  Portability problems fixed by Gnulib module @code{dup2-obsolete}:
  @itemize
  @item
  This function is missing on some older platforms.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @end itemize
  

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