| tty.c (46112) | tty.c (46568) |
|---|---|
| 1/*- 2 * Copyright (c) 1982, 1986, 1990, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 22 unchanged lines hidden (view full) --- 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)tty.c 8.8 (Berkeley) 1/21/94 | 1/*- 2 * Copyright (c) 1982, 1986, 1990, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 22 unchanged lines hidden (view full) --- 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)tty.c 8.8 (Berkeley) 1/21/94 |
| 39 * $Id: tty.c,v 1.115 1999/02/19 19:34:49 luoqi Exp $ | 39 * $Id: tty.c,v 1.116 1999/04/27 11:16:17 phk Exp $ |
| 40 */ 41 42/*- 43 * TODO: 44 * o Fix races for sending the start char in ttyflush(). 45 * o Handle inter-byte timeout for "MIN > 0, TIME > 0" in ttyselect(). 46 * With luck, there will be MIN chars before select() returns(). 47 * o Handle CLOCAL consistently for ptys. Perhaps disallow setting it. --- 1016 unchanged lines hidden (view full) --- 1064 int s; 1065 int revents = 0; 1066 1067 if (tp == NULL) /* XXX used to return ENXIO, but that means true! */ 1068 return ((events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)) 1069 | POLLHUP); 1070 1071 s = spltty(); | 40 */ 41 42/*- 43 * TODO: 44 * o Fix races for sending the start char in ttyflush(). 45 * o Handle inter-byte timeout for "MIN > 0, TIME > 0" in ttyselect(). 46 * With luck, there will be MIN chars before select() returns(). 47 * o Handle CLOCAL consistently for ptys. Perhaps disallow setting it. --- 1016 unchanged lines hidden (view full) --- 1064 int s; 1065 int revents = 0; 1066 1067 if (tp == NULL) /* XXX used to return ENXIO, but that means true! */ 1068 return ((events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)) 1069 | POLLHUP); 1070 1071 s = spltty(); |
| 1072 if (events & (POLLIN | POLLRDNORM)) | 1072 if (events & (POLLIN | POLLRDNORM)) { |
| 1073 if (ttnread(tp) > 0 || ISSET(tp->t_state, TS_ZOMBIE)) 1074 revents |= events & (POLLIN | POLLRDNORM); 1075 else 1076 selrecord(p, &tp->t_rsel); | 1073 if (ttnread(tp) > 0 || ISSET(tp->t_state, TS_ZOMBIE)) 1074 revents |= events & (POLLIN | POLLRDNORM); 1075 else 1076 selrecord(p, &tp->t_rsel); |
| 1077 1078 if (events & (POLLOUT | POLLWRNORM)) | 1077 } 1078 if (events & (POLLOUT | POLLWRNORM)) { |
| 1079 if ((tp->t_outq.c_cc <= tp->t_olowat && 1080 ISSET(tp->t_state, TS_CONNECTED)) 1081 || ISSET(tp->t_state, TS_ZOMBIE)) 1082 revents |= events & (POLLOUT | POLLWRNORM); 1083 else 1084 selrecord(p, &tp->t_wsel); | 1079 if ((tp->t_outq.c_cc <= tp->t_olowat && 1080 ISSET(tp->t_state, TS_CONNECTED)) 1081 || ISSET(tp->t_state, TS_ZOMBIE)) 1082 revents |= events & (POLLOUT | POLLWRNORM); 1083 else 1084 selrecord(p, &tp->t_wsel); |
| 1085 } |
|
| 1085 splx(s); 1086 return (revents); 1087} 1088 1089/* 1090 * This is a wrapper for compatibility with the select vector used by 1091 * cdevsw. It relies on a proper xxxdevtotty routine. 1092 */ --- 1339 unchanged lines hidden --- | 1086 splx(s); 1087 return (revents); 1088} 1089 1090/* 1091 * This is a wrapper for compatibility with the select vector used by 1092 * cdevsw. It relies on a proper xxxdevtotty routine. 1093 */ --- 1339 unchanged lines hidden --- |