Hi, On Tue, Nov 22, 2022 at 07:32:20PM +0100, J.H. van de Water wrote: > Clarify that select(2) will block on the read end of a pipe/fifo, if the > write end of the pipe/fifo has never been opened before, unlike read(2). > > Signed-off-by: J.H. vd Water <henri.van.de.water@xxxxxxxxx> I just saw this mail in my inbox; sorry for the delay! > --- > man2/select.2 | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/man2/select.2 b/man2/select.2 > index 199522a01..673d626a9 100644 > --- a/man2/select.2 > +++ b/man2/select.2 > @@ -77,6 +77,15 @@ perform a corresponding I/O operation (e.g., > or a sufficiently small > .BR write (2)) > without blocking. > +.PP > +However, note that > +.BR select () > +will block on the read end of a pipe/fifo, if the write end of > +the pipe/fifo has never been opened before, unlike > +.BR read (2). > +(read(2) will always return with zero if the write end of > +the pipe/fifo is closed - see pipe(7) where the text starts with read(2) and pipe(7) above should be marked up as man page references. Thanks, Alex > +I/O on pipes and FIFOs). > .\" > .SS fd_set > A structure type that can represent a set of file descriptors. > -- > 2.38.1 >
Attachment:
signature.asc
Description: PGP signature
