xnu-3247.1.106.tar.gz

[apple/xnu.git] / bsd / miscfs / fifofs / fifo_vnops.c

diff --git a/bsd/miscfs/fifofs/fifo_vnops.c b/bsd/miscfs/fifofs/fifo_vnops.c
index 23c596618a262f16b556e85df9b19569a70d9dde..62cc11fed13b85cc7c737ce202219acec79b4f8d 100644 (file)
--- a/bsd/miscfs/fifofs/fifo_vnops.c
+++ b/bsd/miscfs/fifofs/fifo_vnops.c
@@ -327,6 +327,8 @@ fifo_read(struct vnop_read_args *ap)
        if (error != EWOULDBLOCK) {
                error = soreceive(rso, (struct sockaddr **)0, uio, (struct mbuf **)0,
                                                (struct mbuf **)0, &rflags);
+               if (error == 0 && ap->a_vp->v_knotes.slh_first != NULL)
+                       KNOTE(&ap->a_vp->v_knotes, 0);
        }
        else {
                /* clear EWOULDBLOCK and return EOF (zero) */
@@ -358,6 +360,8 @@ fifo_write(struct vnop_write_args *ap)
 #endif
        error = sosend(wso, (struct sockaddr *)0, ap->a_uio, NULL,
                       (struct mbuf *)0, (ap->a_ioflag & IO_NDELAY) ? MSG_NBIO : 0);
+       if (error == 0 && ap->a_vp->v_knotes.slh_first != NULL)
+               KNOTE(&ap->a_vp->v_knotes, 0);
 
        return (error);
 }