| 1 | /* ELLE - Copyright 1982, 1984, 1987 by Ken Harrenstien, SRI International
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| 2 | * This software is quasi-public; it may be used freely with
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| 3 | * like software, but may NOT be sold or made part of licensed
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| 4 | * products without permission of the author.
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| 5 | */
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| 6 | /* EESITE Site dependent frobs
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| 7 | * Primarily TS_ routines for TTY control. Most site-dependent
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| 8 | * routine is TS_INP for detection of TTY input.
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| 9 | */
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| 10 |
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| 11 | #include "elle.h"
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| 12 |
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| 13 | #if !(V6)
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| 14 | #include <signal.h> /* For SIGTSTP in ts_pause */
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| 15 | #else
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| 16 | #include "eesigs.h"
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| 17 | #endif
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| 18 |
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| 19 | int tsf_pause = 0; /* Set if ts_pause works. Ref'd by equit in e_main */
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| 20 |
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| 21 | #if !(SYSV || BBN) /* SYSV and BBN have weird tty calls */
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| 22 |
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| 23 | #if MINIX
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| 24 | #include <termios.h>
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| 25 | struct termios origterm, newterm;
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| 26 | #else
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| 27 | #if V6
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| 28 | /* Normal V6 declarations, must provide explicitly */
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| 29 | struct sgttyb {
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| 30 | char sg_ispeed;
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| 31 | char sg_ospeed;
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| 32 | char sg_erase;
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| 33 | char sg_kill;
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| 34 | int sg_flags;
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| 35 | };
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| 36 | #define ECHO (010)
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| 37 | #define CRMOD (020)
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| 38 | #define RAW (040)
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| 39 | #else
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| 40 | /* Normal V7 UNIX declarations, can use include file */
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| 41 | #include <sgtty.h>
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| 42 | #endif
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| 43 |
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| 44 | struct sgttyb nstate; /* Both V6 and V7 */
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| 45 | struct sgttyb ostate; /* Both V6 and V7 */
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| 46 | #endif /*!(SYSV || BBN)*/
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| 47 | #endif /*!MINIX*/
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| 48 |
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| 49 |
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| 50 | #if BBN /* BBN system frobs */
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| 51 | #include "/sys/sys/h/modtty.h"
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| 52 | struct modes nstate;
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| 53 | struct modes ostate;
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| 54 | #endif /*BBN*/
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| 55 |
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| 56 | #if DNTTY /* DN TTY frobs */
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| 57 | #include <tty.h>
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| 58 | char partab[2]; /* to satisfy obscene ref in tty.h */
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| 59 | #endif /*DNTTY*/
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| 60 |
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| 61 |
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| 62 | #if (UCB || TOPS20) /* UCB, TOPS20 additional frobs */
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| 63 | #include <sys/ioctl.h> /* For ts_inp() and tldisc */
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| 64 | #if IMAGEN
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| 65 | struct tchars otchars, ntchars; /* Original and new tchars */
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| 66 | #endif /*IMAGEN*/
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| 67 | #endif /*(UCB || TOPS20)*/
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| 68 |
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| 69 | #if SYSV /* System V (and PC/IX) crocks */
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| 70 | #include <termio.h>
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| 71 | #include <sys/ioctl.h>
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| 72 |
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| 73 | struct termio /* terminal i/o status flags */
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| 74 | origterm, /* status of terminal at start of ELLE */
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| 75 | newterm; /* status of terminal when using ELLE */
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| 76 | #endif /*SYSV*/
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| 77 |
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| 78 | /* TS_INP
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| 79 | * Ask system if terminal input is available (on file descriptor 0).
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| 80 | * Returns non-zero if so, else returns zero.
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| 81 | * Very important that this call NOT hang or block in any way,
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| 82 | * because it is used to detect type-ahead by the user;
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| 83 | * return should be immediate whether or not input is waiting.
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| 84 | */
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| 85 | ts_inp()
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| 86 | {
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| 87 | #if BBN /* Idiosyncratic */
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| 88 | int cap_buf[2];
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| 89 | capac (0, &cap_buf[0], 4);
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| 90 | return (cap_buf[0]);
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| 91 | #endif /*BBN*/
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| 92 |
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| 93 | #if (DNTTY || ONYX) /* Have "empty()" syscall */
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| 94 | return(empty(0) ? 0 : 1);
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| 95 | #endif /*DNTTY || ONYX*/
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| 96 | #if (UCB || TOPS20) /* Have FIONREAD ioctl */
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| 97 | long retval;
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| 98 | if(ioctl(0,FIONREAD,&retval)) /* If this call fails, */
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| 99 | return(0); /* assume no input waiting */
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| 100 | return((retval ? 1 : 0));
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| 101 | #endif /*UCB || TOPS20*/
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| 102 | #if COHERENT
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| 103 | int retval;
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| 104 | ioctl(0, TIOCQUERY, &retval);
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| 105 | return((retval ? 1 : 0));
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| 106 | #endif /*COHERENT*/
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| 107 | #if VENIX86
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| 108 | struct sgttyb iocbuf;
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| 109 | ioctl(0, TIOCQCNT, &iocbuf);
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| 110 | return(iocbuf.sg_ispeed != 0 );
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| 111 | #endif /*VENIX86*/
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| 112 |
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| 113 | #if !(BBN||COHERENT||DNTTY||ONYX||TOPS20||UCB||VENIX86)
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| 114 | return(0); /* Default - never any type-ahead, sigh */
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| 115 | #endif
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| 116 | }
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| 117 |
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| 118 |
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| 119 | /* TS_INIT()
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| 120 | * Get terminal information from system, initialize things for
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| 121 | * ts_enter and ts_exit. This is called before t_init.
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| 122 | * Must set "trm_ospeed".
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| 123 | */
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| 124 | ts_init()
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| 125 | {
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| 126 | #if DNTTY
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| 127 | signal(16,1); /* DN peculiar - turn off ctl-A */
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| 128 | #endif /*DNTTY*/
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| 129 |
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| 130 | #if !(MINIX || SYSV || BBN) /* Normal UNIX stuff */
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| 131 | ioctl(1, TIOCGETP, &ostate); /* Remember old state */
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| 132 | nstate = ostate; /* Set up edit-mode state vars */
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| 133 | nstate.sg_flags |= RAW; /* We'll want raw mode */
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| 134 | nstate.sg_flags &= ~(ECHO|CRMOD); /* with no echoing */
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| 135 | trm_ospeed = ostate.sg_ospeed;
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| 136 |
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| 137 | #if (IMAGEN && UCB)
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| 138 | /* Get around 4.1+ remote/local flow control bug (from Gosmacs) */
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| 139 | ioctl(0, TIOCGETC, &otchars); /* Save original tchars */
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| 140 | ntchars = otchars;
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| 141 | ntchars.t_startc = -1; /* Kill start/stop */
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| 142 | ntchars.t_stopc = -1;
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| 143 | ioctl(0, TIOCSETC, &ntchars);
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| 144 | #endif /*IMAGEN && UCB*/
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| 145 | #endif /*!(SYSV || BBN)*/
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| 146 |
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| 147 | #if BBN
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| 148 | modtty(1, M_GET | M_MODES, &ostate, sizeof(ostate)); /* Save old */
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| 149 | modtty(1, M_GET | M_MODES, &nstate, sizeof(nstate)); /* Setup new */
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| 150 | nstate.t_erase = nstate.t_kill = nstate.t_intr = nstate.t_esc =
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| 151 | nstate.t_eof = nstate.t_replay = 0377;
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| 152 | nstate.t_quit = BELL; /* ^G */
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| 153 | nstate.t_breaks = TB_ALL; /* break on all */
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| 154 | nstate.t_iflags &= ~TI_ECHO & ~TI_NOSPCL & ~TI_CRMOD;
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| 155 | /* no echos, specials on, no CR -> LF*/
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| 156 | nstate.t_iflags |= TI_CLR_MSB; /* ignore parity */
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| 157 | nstate.t_oflags &= ~TO_CRMOD & ~TO_AUTONL; /* no CR -> NL */
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| 158 | if (trm_flags & NOXONOFF)
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| 159 | nstate.t_oflags &= ~TO_XONXOFF;
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| 160 | else
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| 161 | nstate.t_oflags |= TO_XONXOFF;
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| 162 |
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| 163 | nstate.t_oflags |= TO_CLR_MSB; /* no special high bits */
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| 164 | nstate.t_pagelen = 0; /* no paging of output */
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| 165 | trm_ospeed = ostate.t_ospeed;
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| 166 | #endif /*BBN*/
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| 167 |
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| 168 | #if MINIX
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| 169 | tcgetattr(0, &origterm); /* How things are now */
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| 170 | newterm = origterm; /* Save them for restore on exit */
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| 171 |
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| 172 | /* input flags */
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| 173 | newterm.c_iflag |= IGNBRK; /* Ignore break conditions.*/
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| 174 | newterm.c_iflag &= ~INLCR; /* Don't map NL to CR on input */
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| 175 | newterm.c_iflag &= ~ICRNL; /* Don't map CR to NL on input */
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| 176 | newterm.c_iflag &= ~BRKINT; /* Do not signal on break.*/
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| 177 | newterm.c_iflag &= ~IXON; /* Disable start/stop output control.*/
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| 178 | newterm.c_iflag &= ~IXOFF; /* Disable start/stop input control.*/
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| 179 |
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| 180 | /* output flags */
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| 181 | newterm.c_oflag &= ~OPOST; /* Disable output processing */
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| 182 |
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| 183 | /* line discipline */
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| 184 | newterm.c_lflag &= ~ISIG; /* Disable signals.*/
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| 185 | newterm.c_lflag &= ~ICANON; /* Want to disable canonical I/O */
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| 186 | newterm.c_lflag &= ~ECHO; /* Disable echo.*/
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| 187 | newterm.c_lflag &= ~ECHONL; /* Disable separate NL echo.*/
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| 188 | newterm.c_lflag &= ~IEXTEN; /* Disable input extensions.*/
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| 189 |
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| 190 | newterm.c_cc[VMIN] = 1; /* Min. chars. on input (immed) */
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| 191 | newterm.c_cc[VTIME] = 0; /* Min. time delay on input (immed) */
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| 192 |
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| 193 | /* Make it stick */
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| 194 | tcsetattr(0, TCSANOW, &newterm);
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| 195 | #endif /*MINIX*/
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| 196 |
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| 197 | #if SYSV
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| 198 | ioctl(0, TCGETA, &origterm); /* How things are now */
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| 199 | newterm = origterm; /* Save them for restore on exit */
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| 200 |
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| 201 | /* input flags */
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| 202 | newterm.c_iflag |= IGNBRK; /* Ignore break conditions.*/
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| 203 | newterm.c_iflag &= ~INLCR; /* Don't map NL to CR on input */
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| 204 | newterm.c_iflag &= ~ICRNL; /* Don't map CR to NL on input */
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| 205 | newterm.c_iflag &= ~BRKINT; /* Do not signal on break.*/
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| 206 | newterm.c_iflag &= ~IXON; /* Disable start/stop output control.*/
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| 207 | newterm.c_iflag &= ~IXOFF; /* Disable start/stop input control.*/
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| 208 |
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| 209 | /* line discipline */
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| 210 | newterm.c_lflag &= ~ISIG; /* Disable signals.*/
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| 211 | newterm.c_lflag &= ~ICANON; /* Want to disable canonical I/O */
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| 212 | newterm.c_lflag &= ~ECHO; /* Disable echo.*/
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| 213 |
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| 214 | newterm.c_cc[4] = 1; /* Min. chars. on input (immed) */
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| 215 | newterm.c_cc[5] = 1; /* Min. time delay on input (immed) */
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| 216 |
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| 217 | /* Make it stick */
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| 218 | ioctl(0, TCSETA, &newterm);
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| 219 | #endif /*SYSV*/
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| 220 |
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| 221 | #if (UCB || TOPS20)
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| 222 | { int tldisc;
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| 223 | ioctl(0, TIOCGETD, &tldisc); /* Find line discipline */
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| 224 |
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| 225 | /* The flag IGN_JOB_CONTROL has been introduced to allow job control haters
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| 226 | * to simply ignore the whole thing. When ELLE is compiled with
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| 227 | * -DIGN_JOB_CONTROL, it will exit properly when the Return to Superior
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| 228 | * command is executed.
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| 229 | */
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| 230 | #if SIGTSTP
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| 231 | #ifndef IGN_JOB_CONTROL
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| 232 | if(tldisc == NTTYDISC) tsf_pause = 1;
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| 233 | #endif
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| 234 | #endif /*SIGTSTP*/
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| 235 |
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| 236 | }
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| 237 | #endif /*UCB || TOPS20*/
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| 238 | }
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| 239 |
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| 240 | /* TS_ENTER()
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| 241 | * Tell system to enter right terminal mode for editing.
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| 242 | * This is called before t_enter.
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| 243 | */
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| 244 | ts_enter()
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| 245 | {
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| 246 | #if !(MINIX || SYSV || BBN)
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| 247 | ioctl(1, TIOCSETP, &nstate);
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| 248 | #if IMAGEN && UCB
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| 249 | ioctl(0, TIOCSETC, &ntchars); /* Restore new tchars */
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| 250 | #endif /*IMAGEN && UCB*/
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| 251 | #endif /*!(SYSV||BBN)*/
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| 252 |
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| 253 | #if BBN
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| 254 | modtty (1, M_SET | M_MODES, &nstate, sizeof (nstate));
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| 255 | #endif /*BBN*/
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| 256 |
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| 257 | #if MINIX
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| 258 | /* Make it behave as previously defined in ts_init */
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| 259 | tcsetattr(0, TCSANOW, &newterm);
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| 260 | #endif /*SYSV*/
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| 261 |
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| 262 | #if SYSV
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| 263 | /* Make it behave as previously defined in ts_init */
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| 264 | ioctl(0, TCSETA, &newterm);
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| 265 | #endif /*SYSV*/
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| 266 |
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| 267 | #if DNTTY /* DN hackery! Enable 8-bit input so as to read meta bit. */
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| 268 | if(dbg_isw)
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| 269 | { tpoke(TH_CSET,T_2FLGS2,EEI); /* Enable ints */
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| 270 | tpoke(TH_CSETB,T_QUIT, 0377); /* Turn off QUIT intrpt */
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| 271 | }
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| 272 | else if(trm_flags & TF_METAKEY)
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| 273 | tpoke(TH_CSET,T_2FLGS2,T2_LITIN); /* Turn on 8-bit input! */
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| 274 | #endif /*DNTTY*/
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| 275 | }
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| 276 |
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| 277 | /* TS_EXIT
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| 278 | * Tell system to restore old terminal mode (we are leaving edit mode).
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| 279 | * This is called after t_exit.
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| 280 | */
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| 281 | ts_exit()
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| 282 | {
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| 283 | #if DNTTY
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| 284 | if(dbg_isw)
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| 285 | tpoke(TH_CCLR,T_2FLGS2,EEI); /* Turn off EEI bit */
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| 286 | else if(trm_flags & TF_METAKEY)
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| 287 | tpoke(TH_CCLR,T_2FLGS2,T2_LITIN); /* Turn off 8-bit input */
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| 288 | #endif /*DNTTY*/
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| 289 |
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| 290 | #if !(MINIX || SYSV || BBN)
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| 291 | ioctl(1, TIOCSETP, &ostate); /* SYSV and BBN don't use stty */
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| 292 | #if IMAGEN && UCB
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| 293 | ioctl(0, TIOCSETC, &otchars); /* Restore original tchars */
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| 294 | #endif /*IMAGEN && UCB*/
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| 295 | #endif /*!(SYSV || BBN)*/
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| 296 |
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| 297 | #if BBN
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| 298 | modtty (1, M_SET | M_MODES, &ostate, sizeof (ostate));
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| 299 | #endif /*BBN*/
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| 300 |
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| 301 | #if MINIX
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| 302 | tcsetattr(0, TCSANOW, &origterm);
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| 303 | #endif /*MINIX*/
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| 304 |
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| 305 | #if SYSV
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| 306 | ioctl(0, TCSETA, &origterm);
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| 307 | #endif /*SYSV*/
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| 308 | }
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| 309 |
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| 310 | #if DNTTY
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| 311 | int thkcmd[] { 0, 0, -1 };
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| 312 | tpoke(cmd,bn,val)
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| 313 | int cmd, bn, val;
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| 314 | {
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| 315 | thkcmd[0] = cmd|bn;
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| 316 | thkcmd[1] = val;
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| 317 | if(ttyhak(0,&thkcmd) < 0)
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| 318 | return(-1);
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| 319 | else return(thkcmd[1]);
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| 320 | }
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| 321 | #endif /*DNTTY*/
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| 322 |
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| 323 |
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| 324 | /* TS_PAUSE - Stop process and return control of TTY to superior.
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| 325 | * There is also a flag variable, TSF_PAUSE, which indicates
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| 326 | * whether or not this routine will actually do anything.
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| 327 | */
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| 328 | #if TOPS20
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| 329 | #include <jsys.h>
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| 330 | #endif
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| 331 |
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| 332 | ts_pause()
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| 333 | {
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| 334 | #if TOPS20
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| 335 | int acs[5];
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| 336 | jsys(HALTF, acs);
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| 337 | #endif
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| 338 |
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| 339 | #if UCB
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| 340 | #if SIGTSTP
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| 341 | signal(SIGTSTP, SIG_DFL);
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| 342 | #if BSD4_2
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| 343 | #define mask(s) (1 << ((s)-1))
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| 344 | sigsetmask(sigblock(0) &~ mask(SIGTSTP));
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| 345 | #endif /*BSD4_2*/
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| 346 | kill(0, SIGTSTP);
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| 347 | #if BSD4_2
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| 348 | sigblock(mask(SIGTSTP));
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| 349 | #endif /*BSD4_2*/
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| 350 | #endif /*SIGTSTP*/
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| 351 | #endif /*UCB*/
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| 352 | }
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| 353 |
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| 354 | ts_winsize()
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| 355 | {
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| 356 | #ifdef TIOCGWINSZ
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| 357 | struct winsize winsize;
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| 358 |
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| 359 | if (ioctl(1, TIOCGWINSZ, &winsize) == 0) {
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| 360 | if (winsize.ws_row != 0) scr_ht = winsize.ws_row;
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| 361 | if (winsize.ws_col != 0) scr_wid = winsize.ws_col;
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| 362 | }
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| 363 | #endif
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| 364 | }
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