| tty.c (29041) | tty.c (29354) |
|---|---|
| 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 1.94 1997/03/24 12:02:59 bde Exp $ | 39 * $Id: tty.c,v 1.95 1997/09/02 20:05:54 bde 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. --- 30 unchanged lines hidden (view full) --- 78#endif 79#include <sys/proc.h> 80#define TTYDEFCHARS 81#include <sys/tty.h> 82#undef TTYDEFCHARS 83#include <sys/fcntl.h> 84#include <sys/conf.h> 85#include <sys/dkstat.h> | 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. --- 30 unchanged lines hidden (view full) --- 78#endif 79#include <sys/proc.h> 80#define TTYDEFCHARS 81#include <sys/tty.h> 82#undef TTYDEFCHARS 83#include <sys/fcntl.h> 84#include <sys/conf.h> 85#include <sys/dkstat.h> |
| 86#include <sys/poll.h> |
|
| 86#include <sys/kernel.h> 87#include <sys/vnode.h> 88#include <sys/signalvar.h> 89#include <sys/resourcevar.h> 90#include <sys/malloc.h> 91#if NSNP > 0 92#include <sys/snoop.h> 93#endif --- 932 unchanged lines hidden (view full) --- 1026#else 1027 return (-1); 1028#endif 1029 } 1030 return (0); 1031} 1032 1033int | 87#include <sys/kernel.h> 88#include <sys/vnode.h> 89#include <sys/signalvar.h> 90#include <sys/resourcevar.h> 91#include <sys/malloc.h> 92#if NSNP > 0 93#include <sys/snoop.h> 94#endif --- 932 unchanged lines hidden (view full) --- 1027#else 1028 return (-1); 1029#endif 1030 } 1031 return (0); 1032} 1033 1034int |
| 1034ttyselect(tp, rw, p) | 1035ttypoll(tp, events, p) |
| 1035 struct tty *tp; | 1036 struct tty *tp; |
| 1036 int rw; | 1037 int events; |
| 1037 struct proc *p; 1038{ 1039 int s; | 1038 struct proc *p; 1039{ 1040 int s; |
| 1041 int revents = 0; |
|
| 1040 | 1042 |
| 1041 if (tp == NULL) 1042 return (ENXIO); | 1043 if (tp == NULL) /* XXX used to return ENXIO, but that means true! */ 1044 return ((events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)) 1045 | POLLHUP); |
| 1043 1044 s = spltty(); | 1046 1047 s = spltty(); |
| 1045 switch (rw) { 1046 case FREAD: | 1048 if (events & (POLLIN | POLLRDNORM)) |
| 1047 if (ttnread(tp) > 0 || ISSET(tp->t_state, TS_ZOMBIE)) | 1049 if (ttnread(tp) > 0 || ISSET(tp->t_state, TS_ZOMBIE)) |
| 1048 goto win; 1049 selrecord(p, &tp->t_rsel); 1050 break; 1051 case FWRITE: | 1050 revents |= events & (POLLIN | POLLRDNORM); 1051 else 1052 selrecord(p, &tp->t_rsel); 1053 1054 if (events & (POLLOUT | POLLWRNORM)) |
| 1052 if ((tp->t_outq.c_cc <= tp->t_lowat && 1053 ISSET(tp->t_state, TS_CONNECTED)) | 1055 if ((tp->t_outq.c_cc <= tp->t_lowat && 1056 ISSET(tp->t_state, TS_CONNECTED)) |
| 1054 || ISSET(tp->t_state, TS_ZOMBIE)) { 1055win: splx(s); 1056 return (1); 1057 } 1058 selrecord(p, &tp->t_wsel); 1059 break; 1060 } | 1057 || ISSET(tp->t_state, TS_ZOMBIE)) 1058 revents |= events & (POLLOUT | POLLWRNORM); 1059 else 1060 selrecord(p, &tp->t_wsel); |
| 1061 splx(s); | 1061 splx(s); |
| 1062 return (0); | 1062 return (revents); |
| 1063} 1064 1065/* 1066 * This is a wrapper for compatibility with the select vector used by 1067 * cdevsw. It relies on a proper xxxdevtotty routine. 1068 */ 1069int | 1063} 1064 1065/* 1066 * This is a wrapper for compatibility with the select vector used by 1067 * cdevsw. It relies on a proper xxxdevtotty routine. 1068 */ 1069int |
| 1070ttselect(dev, rw, p) | 1070ttpoll(dev, events, p) |
| 1071 dev_t dev; | 1071 dev_t dev; |
| 1072 int rw; | 1072 int events; |
| 1073 struct proc *p; 1074{ | 1073 struct proc *p; 1074{ |
| 1075 return ttyselect((*cdevsw[major(dev)]->d_devtotty)(dev), rw, p); | 1075 return ttypoll((*cdevsw[major(dev)]->d_devtotty)(dev), events, p); |
| 1076} 1077 1078/* 1079 * Must be called at spltty(). 1080 */ 1081static int 1082ttnread(tp) 1083 struct tty *tp; --- 1291 unchanged lines hidden --- | 1076} 1077 1078/* 1079 * Must be called at spltty(). 1080 */ 1081static int 1082ttnread(tp) 1083 struct tty *tp; --- 1291 unchanged lines hidden --- |