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

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• Hash : 2f7479a1
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  Date : 2022-12-02T14:45:23
  

  doc: poll: document poll of special files not supported on macOS
  
  * doc/posix-functions/poll.texi: Reinstate (updated) macOS info,
  removed in recent cleanup re removal of support for Mac OS X <= 10.4.
  * m4/poll.m4: Update macOS to latest tested version.
  

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• doc/posix-functions/poll.texi

• @node poll
  @section @code{poll}
  @findex poll
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/poll.html}
  
  Gnulib module: poll
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  This function is missing on some platforms:
  mingw, MSVC 14, HP NonStop.
  @item
  This function doesn't work on special files like @file{/dev/null} and ttys like
  @file{/dev/tty} on some platforms:
  macOS 10.15, AIX 5.3.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  Under Windows, when passing a pipe, Gnulib's @code{poll} replacement might
  return 0 even before the timeout has passed.  Programs using it with pipes can
  thus busy wait.
  @item
  On some platforms, file descriptors other than sockets do not support
  POLLHUP; they will return a "readable" or "writable" status instead:
  AIX 7.2, HP NonStop.
  @end itemize
  

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