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| author | Paolo Bonzini <pbonzini@redhat.com> | 2012-09-13 08:51:16 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2012-09-13 08:57:01 +0200 |
| commit | 48e7c1cff9531ce0fe05108ea7ec69f2d20472b5 (patch) | |
| tree | 29badae1b4a9a5553784dabd0d39591551d99679 /doc/posix-functions/select.texi | |
| parent | 70d61f6c220a86950889eeeb41e54630e7c31c7d (diff) | |
| download | gnulib-48e7c1cff9531ce0fe05108ea7ec69f2d20472b5.tar.gz | |
poll/select: document portability problems not fixed by Gnulib.
* doc/posix-functions/poll.texi: poll does not work well on
pipes under Windows. It has the same limitations as select on
BeOS.
* doc/posix-functions/select.texi: select does not work well
on pipes under Windows.
Diffstat (limited to 'doc/posix-functions/select.texi')
| -rw-r--r-- | doc/posix-functions/select.texi | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/posix-functions/select.texi b/doc/posix-functions/select.texi index e59b3cf8e6..c13b30f55a 100644 --- a/doc/posix-functions/select.texi +++ b/doc/posix-functions/select.texi @@ -31,6 +31,10 @@ unmodified. On BeOS, @code{select} can only be called on descriptors created by the @code{socket} function, not on regular file descriptors. @item +Under Windows, when passing a pipe, Gnulib's @code{select} replacement might +return 0 even before the timeout has passed. Programs using it with pipes can +thus busy wait. +@item On Solaris 2.6 and older, @code{select} applied to a file descriptor opened for reading and associated with @code{/dev/null} hangs, waiting for input, when instead it should return immediately. |