5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/poll.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
13 mingw, MSVC 14, HP NonStop.
15 This function doesn't work on special files like @file{/dev/null} and ttys like
16 @file{/dev/tty} on some platforms:
20 Portability problems not fixed by Gnulib:
23 Under Windows, when passing a pipe, Gnulib's @code{poll} replacement might
24 return 0 even before the timeout has passed. Programs using it with pipes can
28 Under HP NonStop, file descriptors other than sockets do not support
29 POLLHUP; they will return a "readable" status instead.