| tty.c (72200) | tty.c (72521) |
|---|---|
| 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 * $FreeBSD: head/sys/kern/tty.c 72200 2001-02-09 06:11:45Z bmilekic $ | 39 * $FreeBSD: head/sys/kern/tty.c 72521 2001-02-15 16:34:11Z jlemon $ |
| 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. --- 60 unchanged lines hidden (view full) --- 108static void ttyecho __P((int c, struct tty *tp)); 109static int ttyoutput __P((int c, register struct tty *tp)); 110static void ttypend __P((struct tty *tp)); 111static void ttyretype __P((struct tty *tp)); 112static void ttyrub __P((int c, struct tty *tp)); 113static void ttyrubo __P((struct tty *tp, int cnt)); 114static void ttyunblock __P((struct tty *tp)); 115static int ttywflush __P((struct tty *tp)); | 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. --- 60 unchanged lines hidden (view full) --- 108static void ttyecho __P((int c, struct tty *tp)); 109static int ttyoutput __P((int c, register struct tty *tp)); 110static void ttypend __P((struct tty *tp)); 111static void ttyretype __P((struct tty *tp)); 112static void ttyrub __P((int c, struct tty *tp)); 113static void ttyrubo __P((struct tty *tp, int cnt)); 114static void ttyunblock __P((struct tty *tp)); 115static int ttywflush __P((struct tty *tp)); |
| 116static int filt_ttyread __P((struct knote *kn, long hint)); 117static void filt_ttyrdetach __P((struct knote *kn)); 118static int filt_ttywrite __P((struct knote *kn, long hint)); 119static void filt_ttywdetach __P((struct knote *kn)); |
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| 116 117/* 118 * Table with character classes and parity. The 8th bit indicates parity, 119 * the 7th bit indicates the character is an alphameric or underscore (for 120 * ALTWERASE), and the low 6 bits indicate delay type. If the low 6 bits 121 * are 0 then the character needs no special processing on output; classes 122 * other than 0 might be translated or (not currently) require delays. 123 */ --- 963 unchanged lines hidden (view full) --- 1087 revents |= events & (POLLOUT | POLLWRNORM); 1088 else 1089 selrecord(p, &tp->t_wsel); 1090 } 1091 splx(s); 1092 return (revents); 1093} 1094 | 120 121/* 122 * Table with character classes and parity. The 8th bit indicates parity, 123 * the 7th bit indicates the character is an alphameric or underscore (for 124 * ALTWERASE), and the low 6 bits indicate delay type. If the low 6 bits 125 * are 0 then the character needs no special processing on output; classes 126 * other than 0 might be translated or (not currently) require delays. 127 */ --- 963 unchanged lines hidden (view full) --- 1091 revents |= events & (POLLOUT | POLLWRNORM); 1092 else 1093 selrecord(p, &tp->t_wsel); 1094 } 1095 splx(s); 1096 return (revents); 1097} 1098 |
| 1099static struct filterops ttyread_filtops = 1100 { 1, NULL, filt_ttyrdetach, filt_ttyread }; 1101static struct filterops ttywrite_filtops = 1102 { 1, NULL, filt_ttywdetach, filt_ttywrite }; 1103 1104int 1105ttykqfilter(dev, kn) 1106 dev_t dev; 1107 struct knote *kn; 1108{ 1109 struct tty *tp = dev->si_tty; 1110 struct klist *klist; 1111 int s; 1112 1113 switch (kn->kn_filter) { 1114 case EVFILT_READ: 1115 klist = &tp->t_rsel.si_note; 1116 kn->kn_fop = &ttyread_filtops; 1117 break; 1118 case EVFILT_WRITE: 1119 klist = &tp->t_wsel.si_note; 1120 kn->kn_fop = &ttywrite_filtops; 1121 break; 1122 default: 1123 return (1); 1124 } 1125 1126 kn->kn_hook = (caddr_t)dev; 1127 1128 s = spltty(); 1129 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 1130 splx(s); 1131 1132 return (0); 1133} 1134 1135static void 1136filt_ttyrdetach(struct knote *kn) 1137{ 1138 struct tty *tp = ((dev_t)kn->kn_hook)->si_tty; 1139 int s = spltty(); 1140 1141 SLIST_REMOVE(&tp->t_rsel.si_note, kn, knote, kn_selnext); 1142 splx(s); 1143} 1144 1145static int 1146filt_ttyread(struct knote *kn, long hint) 1147{ 1148 struct tty *tp = ((dev_t)kn->kn_hook)->si_tty; 1149 1150 kn->kn_data = ttnread(tp); 1151 if (ISSET(tp->t_state, TS_ZOMBIE)) { 1152 kn->kn_flags |= EV_EOF; 1153 return (1); 1154 } 1155 return (kn->kn_data > 0); 1156} 1157 1158static void 1159filt_ttywdetach(struct knote *kn) 1160{ 1161 struct tty *tp = ((dev_t)kn->kn_hook)->si_tty; 1162 int s = spltty(); 1163 1164 SLIST_REMOVE(&tp->t_wsel.si_note, kn, knote, kn_selnext); 1165 splx(s); 1166} 1167 1168static int 1169filt_ttywrite(kn, hint) 1170 struct knote *kn; 1171 long hint; 1172{ 1173 struct tty *tp = ((dev_t)kn->kn_hook)->si_tty; 1174 1175 kn->kn_data = tp->t_outq.c_cc; 1176 if (ISSET(tp->t_state, TS_ZOMBIE)) 1177 return (1); 1178 return (kn->kn_data <= tp->t_olowat && 1179 ISSET(tp->t_state, TS_CONNECTED)); 1180} 1181 |
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| 1095/* 1096 * Must be called at spltty(). 1097 */ 1098static int 1099ttnread(tp) 1100 struct tty *tp; 1101{ 1102 int nread; --- 1010 unchanged lines hidden (view full) --- 2113 register struct tty *tp; 2114{ 2115 2116 if (tp->t_rsel.si_pid != 0) 2117 selwakeup(&tp->t_rsel); 2118 if (ISSET(tp->t_state, TS_ASYNC) && tp->t_sigio != NULL) 2119 pgsigio(tp->t_sigio, SIGIO, (tp->t_session != NULL)); 2120 wakeup(TSA_HUP_OR_INPUT(tp)); | 1182/* 1183 * Must be called at spltty(). 1184 */ 1185static int 1186ttnread(tp) 1187 struct tty *tp; 1188{ 1189 int nread; --- 1010 unchanged lines hidden (view full) --- 2200 register struct tty *tp; 2201{ 2202 2203 if (tp->t_rsel.si_pid != 0) 2204 selwakeup(&tp->t_rsel); 2205 if (ISSET(tp->t_state, TS_ASYNC) && tp->t_sigio != NULL) 2206 pgsigio(tp->t_sigio, SIGIO, (tp->t_session != NULL)); 2207 wakeup(TSA_HUP_OR_INPUT(tp)); |
| 2208 KNOTE(&tp->t_rsel.si_note, 0); |
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| 2121} 2122 2123/* 2124 * Wake up any writers on a tty. 2125 */ 2126void 2127ttwwakeup(tp) 2128 register struct tty *tp; --- 8 unchanged lines hidden (view full) --- 2137 CLR(tp->t_state, TS_SO_OCOMPLETE); 2138 wakeup(TSA_OCOMPLETE(tp)); 2139 } 2140 if (ISSET(tp->t_state, TS_SO_OLOWAT) && 2141 tp->t_outq.c_cc <= tp->t_olowat) { 2142 CLR(tp->t_state, TS_SO_OLOWAT); 2143 wakeup(TSA_OLOWAT(tp)); 2144 } | 2209} 2210 2211/* 2212 * Wake up any writers on a tty. 2213 */ 2214void 2215ttwwakeup(tp) 2216 register struct tty *tp; --- 8 unchanged lines hidden (view full) --- 2225 CLR(tp->t_state, TS_SO_OCOMPLETE); 2226 wakeup(TSA_OCOMPLETE(tp)); 2227 } 2228 if (ISSET(tp->t_state, TS_SO_OLOWAT) && 2229 tp->t_outq.c_cc <= tp->t_olowat) { 2230 CLR(tp->t_state, TS_SO_OLOWAT); 2231 wakeup(TSA_OLOWAT(tp)); 2232 } |
| 2233 KNOTE(&tp->t_wsel.si_note, 0); |
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| 2145} 2146 2147/* 2148 * Look up a code for a specified speed in a conversion table; 2149 * used by drivers to map software speed values to hardware parameters. 2150 */ 2151int 2152ttspeedtab(speed, table) --- 346 unchanged lines hidden --- | 2234} 2235 2236/* 2237 * Look up a code for a specified speed in a conversion table; 2238 * used by drivers to map software speed values to hardware parameters. 2239 */ 2240int 2241ttspeedtab(speed, table) --- 346 unchanged lines hidden --- |