| tty.c (9626) | tty.c (9639) |
|---|---|
| 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 1.55 1995/07/21 22:51:50 bde Exp $ | 39 * $Id: tty.c,v 1.56 1995/07/22 01:30:31 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. --- 908 unchanged lines hidden (view full) --- 956 pgsignal(tp->t_pgrp, SIGWINCH, 1); 957 } 958 break; 959 case TIOCSDRAINWAIT: 960 error = suser(p->p_ucred, &p->p_acflag); 961 if (error) 962 return (error); 963 tp->t_timeout = *(int *)data * hz; | 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. --- 908 unchanged lines hidden (view full) --- 956 pgsignal(tp->t_pgrp, SIGWINCH, 1); 957 } 958 break; 959 case TIOCSDRAINWAIT: 960 error = suser(p->p_ucred, &p->p_acflag); 961 if (error) 962 return (error); 963 tp->t_timeout = *(int *)data * hz; |
| 964 wakeup((caddr_t)&tp->t_outq); | 964 wakeup(TSA_OLOWAT(tp)); |
| 965 break; 966 case TIOCGDRAINWAIT: 967 *(int *)data = tp->t_timeout / hz; 968 break; 969 default: 970#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 971 return (ttcompat(tp, cmd, data, flag)); 972#else --- 99 unchanged lines hidden (view full) --- 1072 * wakeups for output below low water when we only care 1073 * about output complete. 1074 */ 1075 if (!ISSET(tp->t_state, TS_BUSY)) 1076 (*tp->t_oproc)(tp); 1077 if ((tp->t_outq.c_cc || ISSET(tp->t_state, TS_BUSY)) && 1078 (ISSET(tp->t_state, TS_CARR_ON) || ISSET(tp->t_cflag, CLOCAL))) { 1079 SET(tp->t_state, TS_ASLEEP); | 965 break; 966 case TIOCGDRAINWAIT: 967 *(int *)data = tp->t_timeout / hz; 968 break; 969 default: 970#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 971 return (ttcompat(tp, cmd, data, flag)); 972#else --- 99 unchanged lines hidden (view full) --- 1072 * wakeups for output below low water when we only care 1073 * about output complete. 1074 */ 1075 if (!ISSET(tp->t_state, TS_BUSY)) 1076 (*tp->t_oproc)(tp); 1077 if ((tp->t_outq.c_cc || ISSET(tp->t_state, TS_BUSY)) && 1078 (ISSET(tp->t_state, TS_CARR_ON) || ISSET(tp->t_cflag, CLOCAL))) { 1079 SET(tp->t_state, TS_ASLEEP); |
| 1080 error = ttysleep(tp, &tp->t_outq, TTOPRI | PCATCH, | 1080 error = ttysleep(tp, TSA_OLOWAT(tp), TTOPRI | PCATCH, |
| 1081 "ttywai", tp->t_timeout); 1082 if (error == EWOULDBLOCK) 1083 error = EIO; 1084 if (error) 1085 break; 1086 } 1087 } 1088 if (!error && (tp->t_outq.c_cc || ISSET(tp->t_state, TS_BUSY))) --- 39 unchanged lines hidden (view full) --- 1128 FLUSHQ(&tp->t_rawq); 1129 tp->t_rocount = 0; 1130 tp->t_rocol = 0; 1131 CLR(tp->t_state, TS_LOCAL); 1132 ttwakeup(tp); 1133 } 1134 if (rw & FWRITE) { 1135 FLUSHQ(&tp->t_outq); | 1081 "ttywai", tp->t_timeout); 1082 if (error == EWOULDBLOCK) 1083 error = EIO; 1084 if (error) 1085 break; 1086 } 1087 } 1088 if (!error && (tp->t_outq.c_cc || ISSET(tp->t_state, TS_BUSY))) --- 39 unchanged lines hidden (view full) --- 1128 FLUSHQ(&tp->t_rawq); 1129 tp->t_rocount = 0; 1130 tp->t_rocol = 0; 1131 CLR(tp->t_state, TS_LOCAL); 1132 ttwakeup(tp); 1133 } 1134 if (rw & FWRITE) { 1135 FLUSHQ(&tp->t_outq); |
| 1136 wakeup((caddr_t)&tp->t_outq); | 1136 wakeup(TSA_OLOWAT(tp)); |
| 1137 selwakeup(&tp->t_wsel); 1138 } 1139 if ((rw & FREAD) && 1140 ISSET(tp->t_state, TS_TBLOCK) && tp->t_rawq.c_cc < TTYHOG/5) { 1141 int queue_full = 0; 1142 1143 if (ISSET(tp->t_iflag, IXOFF) && 1144 tp->t_cc[VSTART] != _POSIX_VDISABLE && --- 364 unchanged lines hidden (view full) --- 1509 if (qp->c_cc <= 0) { 1510sleep: 1511 carrier = ISSET(tp->t_state, TS_CARR_ON) || 1512 ISSET(tp->t_cflag, CLOCAL); 1513 if (!carrier && ISSET(tp->t_state, TS_ISOPEN)) { 1514 splx(s); 1515 return (0); /* EOF */ 1516 } | 1137 selwakeup(&tp->t_wsel); 1138 } 1139 if ((rw & FREAD) && 1140 ISSET(tp->t_state, TS_TBLOCK) && tp->t_rawq.c_cc < TTYHOG/5) { 1141 int queue_full = 0; 1142 1143 if (ISSET(tp->t_iflag, IXOFF) && 1144 tp->t_cc[VSTART] != _POSIX_VDISABLE && --- 364 unchanged lines hidden (view full) --- 1509 if (qp->c_cc <= 0) { 1510sleep: 1511 carrier = ISSET(tp->t_state, TS_CARR_ON) || 1512 ISSET(tp->t_cflag, CLOCAL); 1513 if (!carrier && ISSET(tp->t_state, TS_ISOPEN)) { 1514 splx(s); 1515 return (0); /* EOF */ 1516 } |
| 1517 error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH, | 1517 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, |
| 1518 carrier ? 1519 "ttyin" : "ttyhup", (int)slp); 1520 splx(s); 1521 if (error == EWOULDBLOCK) 1522 error = 0; 1523 else if (error) 1524 return (error); 1525 /* --- 139 unchanged lines hidden (view full) --- 1665 ttstart(tp); 1666 if (wait == 0 || curproc->p_siglist != oldsig) { 1667 splx(s); 1668 return (0); 1669 } 1670 timeout((void (*)__P((void *)))wakeup, 1671 (void *)&tp->t_outq, hz); 1672 SET(tp->t_state, TS_ASLEEP); | 1518 carrier ? 1519 "ttyin" : "ttyhup", (int)slp); 1520 splx(s); 1521 if (error == EWOULDBLOCK) 1522 error = 0; 1523 else if (error) 1524 return (error); 1525 /* --- 139 unchanged lines hidden (view full) --- 1665 ttstart(tp); 1666 if (wait == 0 || curproc->p_siglist != oldsig) { 1667 splx(s); 1668 return (0); 1669 } 1670 timeout((void (*)__P((void *)))wakeup, 1671 (void *)&tp->t_outq, hz); 1672 SET(tp->t_state, TS_ASLEEP); |
| 1673 (void) tsleep((caddr_t)&tp->t_outq, PZERO - 1, "ttoutq", 0); | 1673 (void) tsleep(TSA_OLOWAT(tp), PZERO - 1, "ttoutq", 0); |
| 1674 } 1675 splx(s); 1676 return (1); 1677} 1678 1679/* 1680 * Process a write call on a tty device. 1681 */ --- 20 unchanged lines hidden (view full) --- 1702 if (ISSET(tp->t_state, TS_ISOPEN)) { 1703 splx(s); 1704 return (EIO); 1705 } else if (flag & IO_NDELAY) { 1706 splx(s); 1707 error = EWOULDBLOCK; 1708 goto out; 1709 } else { | 1674 } 1675 splx(s); 1676 return (1); 1677} 1678 1679/* 1680 * Process a write call on a tty device. 1681 */ --- 20 unchanged lines hidden (view full) --- 1702 if (ISSET(tp->t_state, TS_ISOPEN)) { 1703 splx(s); 1704 return (EIO); 1705 } else if (flag & IO_NDELAY) { 1706 splx(s); 1707 error = EWOULDBLOCK; 1708 goto out; 1709 } else { |
| 1710 /* Sleep awaiting carrier. */ 1711 error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH, | 1710 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, |
| 1712 "ttydcd", 0); 1713 splx(s); 1714 if (error) 1715 goto out; 1716 goto loop; 1717 } 1718 } 1719 splx(s); --- 138 unchanged lines hidden (view full) --- 1858 goto loop; 1859 } 1860 if (flag & IO_NDELAY) { 1861 splx(s); 1862 uio->uio_resid += cc; 1863 return (uio->uio_resid == cnt ? EWOULDBLOCK : 0); 1864 } 1865 SET(tp->t_state, TS_ASLEEP); | 1711 "ttydcd", 0); 1712 splx(s); 1713 if (error) 1714 goto out; 1715 goto loop; 1716 } 1717 } 1718 splx(s); --- 138 unchanged lines hidden (view full) --- 1857 goto loop; 1858 } 1859 if (flag & IO_NDELAY) { 1860 splx(s); 1861 uio->uio_resid += cc; 1862 return (uio->uio_resid == cnt ? EWOULDBLOCK : 0); 1863 } 1864 SET(tp->t_state, TS_ASLEEP); |
| 1866 error = ttysleep(tp, &tp->t_outq, TTOPRI | PCATCH, "ttywri", tp->t_timeout); | 1865 error = ttysleep(tp, TSA_OLOWAT(tp), TTOPRI | PCATCH, "ttywri", 1866 tp->t_timeout); |
| 1867 splx(s); 1868 if (error == EWOULDBLOCK) 1869 error = EIO; 1870 if (error) 1871 goto out; 1872 goto loop; 1873} 1874 --- 170 unchanged lines hidden (view full) --- 2045void 2046ttwakeup(tp) 2047 register struct tty *tp; 2048{ 2049 2050 selwakeup(&tp->t_rsel); 2051 if (ISSET(tp->t_state, TS_ASYNC)) 2052 pgsignal(tp->t_pgrp, SIGIO, 1); | 1867 splx(s); 1868 if (error == EWOULDBLOCK) 1869 error = EIO; 1870 if (error) 1871 goto out; 1872 goto loop; 1873} 1874 --- 170 unchanged lines hidden (view full) --- 2045void 2046ttwakeup(tp) 2047 register struct tty *tp; 2048{ 2049 2050 selwakeup(&tp->t_rsel); 2051 if (ISSET(tp->t_state, TS_ASYNC)) 2052 pgsignal(tp->t_pgrp, SIGIO, 1); |
| 2053 wakeup((caddr_t)&tp->t_rawq); | 2053 wakeup(TSA_CARR_ON(tp)); |
| 2054} 2055 2056/* 2057 * Wake up any writers on a tty. 2058 */ 2059void 2060ttwwakeup(tp) 2061 register struct tty *tp; 2062{ 2063 2064 if (tp->t_outq.c_cc <= tp->t_lowat) { 2065 if (tp->t_state & TS_ASLEEP) { 2066 tp->t_state &= ~TS_ASLEEP; | 2054} 2055 2056/* 2057 * Wake up any writers on a tty. 2058 */ 2059void 2060ttwwakeup(tp) 2061 register struct tty *tp; 2062{ 2063 2064 if (tp->t_outq.c_cc <= tp->t_lowat) { 2065 if (tp->t_state & TS_ASLEEP) { 2066 tp->t_state &= ~TS_ASLEEP; |
| 2067 wakeup(&tp->t_outq); | 2067 wakeup(TSA_OLOWAT(tp)); |
| 2068 } 2069 selwakeup(&tp->t_wsel); 2070 } 2071} 2072 2073/* 2074 * Look up a code for a specified speed in a conversion table; 2075 * used by drivers to map software speed values to hardware parameters. --- 245 unchanged lines hidden --- | 2068 } 2069 selwakeup(&tp->t_wsel); 2070 } 2071} 2072 2073/* 2074 * Look up a code for a specified speed in a conversion table; 2075 * used by drivers to map software speed values to hardware parameters. --- 245 unchanged lines hidden --- |