diff options
| author | alfred <alfred@FreeBSD.org> | 2002-01-14 22:03:48 +0000 |
|---|---|---|
| committer | alfred <alfred@FreeBSD.org> | 2002-01-14 22:03:48 +0000 |
| commit | c8a759143f8689504efbb41dfca02009a497548e (patch) | |
| tree | fbe2d61149ddb25f961f4713e1fd423963eea4c7 /sys/kern | |
| parent | d5ccc496a64277c6ec707c6dd76aef59342cae27 (diff) | |
| download | FreeBSD-src-c8a759143f8689504efbb41dfca02009a497548e.zip FreeBSD-src-c8a759143f8689504efbb41dfca02009a497548e.tar.gz | |
Fix select on fifos.
Backout revision 1.56 and 1.57 of fifo_vnops.c.
Introduce a new poll op "POLLINIGNEOF" that can be used to ignore
EOF on a fifo, POLLIN/POLLRDNORM is converted to POLLINIGNEOF within
the FIFO implementation to effect the correct behavior.
This should allow one to view a fifo pretty much as a data source
rather than worry about connections coming and going.
Reviewed by: bde
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/uipc_socket.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/sys/kern/uipc_socket.c b/sys/kern/uipc_socket.c index 114aae6..d81a97d 100644 --- a/sys/kern/uipc_socket.c +++ b/sys/kern/uipc_socket.c @@ -1538,6 +1538,11 @@ sopoll(struct socket *so, int events, struct ucred *cred, struct thread *td) if (soreadable(so)) revents |= events & (POLLIN | POLLRDNORM); + if (events & POLLINIGNEOF) + if (so->so_rcv.sb_cc >= so->so_rcv.sb_lowat || + !TAILQ_EMPTY(&so->so_comp) || so->so_error) + revents |= POLLINIGNEOF; + if (events & (POLLOUT | POLLWRNORM)) if (sowriteable(so)) revents |= events & (POLLOUT | POLLWRNORM); @@ -1547,7 +1552,9 @@ sopoll(struct socket *so, int events, struct ucred *cred, struct thread *td) revents |= events & (POLLPRI | POLLRDBAND); if (revents == 0) { - if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) { + if (events & + (POLLIN | POLLINIGNEOF | POLLPRI | POLLRDNORM | + POLLRDBAND)) { selrecord(td, &so->so_rcv.sb_sel); so->so_rcv.sb_flags |= SB_SEL; } |
