/* ttynew.c 4.12 81/07/08 */ /* * New version of tty driver, supported * as NTTYDISC. Adapted from a tty.c written * by J.E.Kulp of IIASA, Austria (jekulp@mc) */ #include "../h/param.h" #include "../h/systm.h" #include "../h/dir.h" #include "../h/user.h" #include "../h/tty.h" #include "../h/proc.h" #include "../h/mx.h" #include "../h/inode.h" #include "../h/file.h" #include "../h/reg.h" #include "../h/conf.h" #include "../h/buf.h" #include "../h/dk.h" char partab[]; /* * Input mapping table-- if an entry is non-zero, when the * corresponding character is typed preceded by "\" the escape * sequence is replaced by the table value. Mostly used for * upper-case only terminals. */ char maptab[]; /* see tty.c */ /* * shorthand */ #define q1 tp->t_rawq #define q2 tp->t_canq #define q3 tp->t_outq #define q4 tp->t_un.t_ctlq #define OBUFSIZ 100 /* * routine called on opens while tp->t_line == NTTYDISC * establishes a process group for distribution of * quits and interrupts from the tty. * (actually, pp->p_pgrp can't be 0 when this routine * is called since NTTYDISC is not the default discipline) */ ntyopen(dev, tp) dev_t dev; register struct tty *tp; { register struct proc *pp; pp = u.u_procp; tp->t_dev = dev; if(pp->p_pgrp == 0) { u.u_ttyp = tp; u.u_ttyd = dev; if (tp->t_pgrp == 0) tp->t_pgrp = pp->p_pid; pp->p_pgrp = tp->t_pgrp; } tp->t_state &= ~WOPEN; tp->t_state |= ISOPEN; if (tp->t_line != NTTYDISC) wflushtty(tp); } /* * clean tp on last close */ ntyclose(tp) register struct tty *tp; { wflushtty(tp); /* let ttyclose do the work if we are really closing */ } /* * block transfer input handler. */ ntyrend(tp, pb, pe) register struct tty *tp; register char *pb, *pe; { int tandem; tandem = tp->t_flags&TANDEM; if (tp->t_flags&RAW) { (void) b_to_q(pb, pe-pb, &tp->t_rawq); if (tp->t_chan) (void) sdata(tp->t_chan); wakeup((caddr_t)&tp->t_rawq); } else { tp->t_flags &= ~TANDEM; while (pb < pe) ntyinput(*pb++, tp); tp->t_flags |= tandem; } if (tandem) ttyblock(tp); } /* * reinput pending characters after state switch * call at spl5(). */ ntypend(tp) register struct tty *tp; { struct clist tq; register c; tp->t_local &= ~LPENDIN; tp->t_lstate |= LSTYPEN; tq = tp->t_rawq; tp->t_rawq.c_cc = 0; tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; while ((c = getc(&tq)) >= 0) ntyinput(c, tp); tp->t_lstate &= ~LSTYPEN; } /* * Place a character on raw TTY input queue, putting in delimiters * and waking up top half as needed. * Also echo if required. * The arguments are the character and the appropriate * tty structure. */ ntyinput(c, tp) register c; register struct tty *tp; { register int t_flags; int i; if (tp->t_local&LPENDIN) ntypend(tp); tk_nin++; c &= 0377; t_flags = tp->t_flags; if (t_flags&TANDEM) ttyblock(tp); if ((t_flags&RAW)==0) { if ((tp->t_lstate&LSTYPEN) == 0) c &= 0177; /* check for literal nexting very first */ if (tp->t_lstate&LSLNCH) { c |= 0200; tp->t_lstate &= ~LSLNCH; } if (c==tlun.t_lnextc) { if (tp->t_flags&ECHO) ntyout("^\b", tp); tp->t_lstate |= LSLNCH; /* check for output control functions */ } else if (c==tun.t_stopc) { if ((tp->t_state&TTSTOP)==0) { tp->t_state |= TTSTOP; (*cdevsw[major(tp->t_dev)].d_stop)(tp); return; } if (c!=tun.t_startc) return; } else if (c==tun.t_startc) { tp->t_state &= ~TTSTOP; tp->t_local &= ~LFLUSHO; ttstart(tp); return; } else if (c==tlun.t_flushc) { if (tp->t_local & LFLUSHO) tp->t_local &= ~LFLUSHO; else { flushtty(tp, FWRITE); ntyecho(c, tp); if (tp->t_rawq.c_cc+tp->t_canq.c_cc) ntyretype(tp); tp->t_local |= LFLUSHO; } ttstart(tp); return; } else if (c==tlun.t_suspc || c==tun.t_intrc || c==tun.t_quitc) { flushtty(tp, c==tlun.t_suspc ? FREAD : FREAD|FWRITE); ntyecho(c, tp); c = c==tun.t_intrc ? SIGINT : ((c==tun.t_quitc) ? SIGQUIT : SIGTSTP); if (tp->t_chan) scontrol(tp->t_chan, M_SIG, c); gsignal(tp->t_pgrp, c); /* check for buffer editing functions - cooked mode */ } else if ((t_flags&CBREAK) == 0) { if ((tp->t_lstate&LSQUOT) && (c==tp->t_erase||c==tp->t_kill)) { ntyrub(unputc(&tp->t_rawq), tp); c |= 0200; } if (c==tp->t_erase) { if (tp->t_rawq.c_cc) ntyrub(unputc(&tp->t_rawq), tp); } else if (c==tp->t_kill) { if (tp->t_local&LCRTKIL && tp->t_rawq.c_cc == tp->t_rocount) { while (tp->t_rawq.c_cc) ntyrub(unputc(&tp->t_rawq), tp); } else { ntyecho(c, tp); ntyecho('\n', tp); while (getc(&tp->t_rawq) > 0) ; tp->t_rocount = 0; } tp->t_lstate = 0; } else if (c==tlun.t_werasc) { if (tp->t_rawq.c_cc == 0) goto out; do { c = unputc(&tp->t_rawq); if (c != ' ' && c != '\t') goto erasenb; ntyrub(c, tp); } while (tp->t_rawq.c_cc); goto out; erasenb: do { ntyrub(c, tp); if (tp->t_rawq.c_cc == 0) goto out; c = unputc(&tp->t_rawq); } while (c != ' ' && c != '\t'); (void) putc(c, &tp->t_rawq); } else if (c==tlun.t_rprntc) { ntyretype(tp); /* check for cooked mode input buffer overflow */ } else if (tp->t_rawq.c_cc + tp->t_canq.c_cc > TTYHOG) { /* we should start a timeout that flushes the buffer if it stays full - same in CBREAK */ if (tp->t_outq.c_cc < TTHIWAT(tp)) (void) ntyoutput(CTRL(g), tp); /* put data char in q for user and wakeup if a break char */ } else if (putc(c, &tp->t_rawq) >= 0) { if (!ntbreakc(c, tp)) { if (tp->t_rocount++ == 0) tp->t_rocol = tp->t_col; } else { tp->t_rocount = 0; catq(&tp->t_rawq, &tp->t_canq); if (tp->t_chan) (void) sdata(tp->t_chan); wakeup((caddr_t)&tp->t_rawq); if (tp->t_local&LINTRUP) gsignal(tp->t_pgrp, SIGTINT); } tp->t_lstate &= ~LSQUOT; if (c == '\\') tp->t_lstate |= LSQUOT; if (tp->t_lstate&LSERASE) { tp->t_lstate &= ~LSERASE; (void) ntyoutput('/', tp); } i = tp->t_col; ntyecho(c, tp); if (c==tun.t_eofc && tp->t_flags&ECHO) { i = MIN(2, tp->t_col - i); while (i > 0) { (void) ntyoutput('\b', tp); i--; } } } /* CBREAK mode */ } else if (tp->t_rawq.c_cc > TTYHOG) { if (tp->t_outq.c_cc < TTHIWAT(tp)) (void) ntyoutput(CTRL(g), tp); } else if (putc(c, &tp->t_rawq) >= 0) { if (tp->t_local&LINTRUP) gsignal(tp->t_pgrp, SIGTINT); if (tp->t_chan) (void) sdata(tp->t_chan); wakeup((caddr_t)&tp->t_rawq); ntyecho(c, tp); } /* RAW mode */ } else if (tp->t_rawq.c_cc > TTYHOG) flushtty(tp, FREAD|FWRITE); else { if (putc(c, &tp->t_rawq) >= 0) { if (tp->t_local&LINTRUP) gsignal(tp->t_pgrp, SIGTINT); if (tp->t_chan) (void) sdata(tp->t_chan); wakeup((caddr_t)&tp->t_rawq); } ntyecho(c, tp); } out: if (tp->t_local & LDECCTQ && tp->t_state & TTSTOP && tun.t_startc != tun.t_stopc) return; tp->t_state &= ~TTSTOP; tp->t_local &= ~LFLUSHO; ttstart(tp); } /* * put character on TTY output queue, adding delays, * expanding tabs, and handling the CR/NL bit. * It is called both from the top half for output, and from * interrupt level for echoing. * The arguments are the character and the tty structure. * Returns < 0 if putc succeeds, otherwise returns char to resend * Must be recursive. */ ntyoutput(c, tp) register c; register struct tty *tp; { register char *colp; register ctype; if (tp->t_flags&RAW || tp->t_local&LLITOUT) { if (tp->t_local&LFLUSHO) return (-1); if (putc(c, &tp->t_outq)) return(c); tk_nout++; return (-1); } /* * Ignore EOT in normal mode to avoid hanging up * certain terminals. */ c &= 0177; if (c==CEOT && (tp->t_flags&CBREAK)==0) return (-1); /* * Turn tabs to spaces as required */ if (c=='\t' && (tp->t_flags&TBDELAY)==XTABS) { register int s; c = 8 - (tp->t_col&7); if ((tp->t_local&LFLUSHO) == 0) { s = spl5(); /* don't interrupt tabs */ c -= b_to_q(" ", c, &tp->t_outq); tk_nout += c; splx(s); } tp->t_col += c; return (c ? -1 : '\t'); } tk_nout++; /* * for upper-case-only terminals, * generate escapes. */ if (tp->t_flags&LCASE) { colp = "({)}!|^~'`"; while(*colp++) if(c == *colp++) { if (ntyoutput('\\', tp) >= 0) return (c); c = colp[-2]; break; } if ('A'<=c && c<='Z') { if (ntyoutput('\\', tp) >= 0) return (c); } else if ('a'<=c && c<='z') c += 'A' - 'a'; } /* * turn <nl> to <cr><lf> if desired. */ if (c=='\n' && tp->t_flags&CRMOD) if (ntyoutput('\r', tp) >= 0) return (c); if (c=='~' && tp->t_local<ILDE) c = '`'; if ((tp->t_local&LFLUSHO) == 0 && putc(c, &tp->t_outq)) return (c); /* * Calculate delays. * The numbers here represent clock ticks * and are not necessarily optimal for all terminals. * The delays are indicated by characters above 0200. * In raw mode there are no delays and the * transmission path is 8 bits wide. */ colp = &tp->t_col; ctype = partab[c]; c = 0; switch (ctype&077) { case ORDINARY: (*colp)++; case CONTROL: break; case BACKSPACE: if (*colp) (*colp)--; break; case NEWLINE: ctype = (tp->t_flags >> 8) & 03; if(ctype == 1) { /* tty 37 */ if (*colp) c = max(((unsigned)*colp>>4) + 3, (unsigned)6); } else if(ctype == 2) { /* vt05 */ c = 6; } *colp = 0; break; case TAB: ctype = (tp->t_flags >> 10) & 03; if(ctype == 1) { /* tty 37 */ c = 1 - (*colp | ~07); if(c < 5) c = 0; } *colp |= 07; (*colp)++; break; case VTAB: if(tp->t_flags & VTDELAY) /* tty 37 */ c = 0177; break; case RETURN: ctype = (tp->t_flags >> 12) & 03; if(ctype == 1) { /* tn 300 */ c = 5; } else if(ctype == 2) { /* ti 700 */ c = 10; } else if(ctype == 3) { /* concept 100 */ int i; if ((i = *colp) >= 0) for (; i<9; i++) (void) putc(0177, &tp->t_outq); } *colp = 0; } if(c && (tp->t_local&LFLUSHO) == 0) (void) putc(c|0200, &tp->t_outq); return (-1); } /* * Called from device's read routine after it has * calculated the tty-structure given as argument. */ ntread(tp) register struct tty *tp; { register struct clist *qp; register c, first; if ((tp->t_state&CARR_ON)==0) return(0); loop: (void) spl5(); if (tp->t_local&LPENDIN) ntypend(tp); (void) spl0(); while (tp == u.u_ttyp && u.u_procp->p_pgrp != tp->t_pgrp) { if (u.u_signal[SIGTTIN] == SIG_IGN || u.u_signal[SIGTTIN] == SIG_HOLD || (u.u_procp->p_flag&SDETACH) || u.u_procp->p_flag&SVFORK) return (0); gsignal(u.u_procp->p_pgrp, SIGTTIN); sleep((caddr_t)&lbolt, TTIPRI); } if (tp->t_flags&RAW) { (void) spl5(); if (tp->t_rawq.c_cc <= 0) { if ((tp->t_state&CARR_ON)==0 || (tp->t_chan && getf(u.u_ap[0])->f_flag&FMP)) { (void) spl0(); return (0); } if (tp->t_local&LINTRUP && u.u_signal[SIGTINT] != SIG_DFL) { u.u_error = EIO; (void) spl0(); return (0); } sleep((caddr_t)&tp->t_rawq, TTIPRI); (void) spl0(); goto loop; } (void) spl0(); while (tp->t_rawq.c_cc && passc(getc(&tp->t_rawq))>=0) ; return (0); } else { qp = tp->t_flags & CBREAK ? &tp->t_rawq : &tp->t_canq; (void) spl5(); if (qp->c_cc <= 0) { if ((tp->t_state&CARR_ON)==0 || (tp->t_chan!=NULL && getf(u.u_ap[0])->f_flag&FMP)) { (void) spl0(); return (0); } if (tp->t_local&LINTRUP && u.u_signal[SIGTINT] != SIG_DFL) { u.u_error = EIO; (void) spl0(); return (0); } sleep((caddr_t)&tp->t_rawq, TTIPRI); (void) spl0(); goto loop; } (void) spl0(); first = 1; while ((c = getc(qp)) >= 0) { if (tp->t_flags&CRMOD && c == '\r') c = '\n'; if (tp->t_flags&LCASE && c <= 0177) if (tp->t_lstate&LSBKSL) { if (maptab[c]) c = maptab[c]; tp->t_lstate &= ~LSBKSL; } else if (c >= 'A' && c <= 'Z') c += 'a' - 'A'; else if (c == '\\') { tp->t_lstate |= LSBKSL; continue; } if (c == tlun.t_dsuspc) { gsignal(tp->t_pgrp, SIGTSTP); if (first) { sleep((caddr_t)&lbolt, TTIPRI); goto loop; } break; } if (c == tun.t_eofc && (tp->t_flags&CBREAK)==0) break; if (passc(c & 0177) < 0) break; if ((tp->t_flags&CBREAK)==0 && ntbreakc(c, tp)) break; first = 0; } tp->t_lstate &= ~LSBKSL; } if (tp->t_state&TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { if (putc(tun.t_startc, &tp->t_outq)==0) { tp->t_state &= ~TBLOCK; ttstart(tp); } tp->t_char = 0; } return (tp->t_rawq.c_cc + tp->t_canq.c_cc); } /* * Called from the device's write routine after it has * calculated the tty-structure given as argument. */ caddr_t ntwrite(tp) register struct tty *tp; { #ifdef vax /* * THE POSITIONING OF CP, CC, AND CE ARE CRITICAL * AND MUST NOT BE CHANGED WITHOUT PATCHING * THE 'ASM' INLINES BELOW. WATCH OUT. */ #endif register char *cp; register int cc, ce; register i; char obuf[OBUFSIZ]; register c; int hiwat = TTHIWAT(tp); if ((tp->t_state&CARR_ON)==0) return (NULL); loop: while (u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && (tp->t_local<OSTOP) && (u.u_procp->p_flag&SVFORK)==0 && u.u_signal[SIGTTOU] != SIG_IGN && u.u_signal[SIGTTOU] != SIG_HOLD && (u.u_procp->p_flag&SDETACH)==0) { gsignal(u.u_procp->p_pgrp, SIGTTOU); sleep((caddr_t)&lbolt, TTIPRI); } while (u.u_count) { cc = MIN(u.u_count, OBUFSIZ); cp = obuf; iomove(cp, (unsigned)cc, B_WRITE); if (u.u_error) break; if (tp->t_outq.c_cc > hiwat) goto ovhiwat; if (tp->t_local&LFLUSHO) continue; if (tp->t_flags&LCASE || tp->t_local<ILDE) { while (cc--) { c = *cp++; tp->t_rocount = 0; while((c = ntyoutput(c, tp)) >= 0) { /* out of clists, wait a bit */ ttstart(tp); sleep((caddr_t)&lbolt, TTOPRI); tp->t_rocount = 0; } if (tp->t_outq.c_cc > hiwat) goto ovhiwat; } continue; } while (cc) { if (tp->t_flags&RAW || tp->t_local&LLITOUT) ce = cc; else { #ifdef vax asm(" scanc r9,(r10),_partab,$077"); asm(" subl3 r0,r9,r8"); #else ce=0; while(((partab[*(unsigned char *)(cp+ce)]&077)==0)&&(ce<cc)) ce++; #endif if (ce==0) { tp->t_rocount = 0; if (ntyoutput(*cp, tp) >= 0) { ttstart(tp); sleep((caddr_t)&lbolt, TTOPRI); continue; } cp++; cc--; if (tp->t_outq.c_cc > hiwat) goto ovhiwat; } } tp->t_rocount = 0; i=b_to_q(cp,ce,&tp->t_outq); ce-=i; tk_nout+=ce; tp->t_col+=ce; cp+=ce; cc-=ce; if (i) { ttstart(tp); sleep((caddr_t)&lbolt, TTOPRI); } if (ce || tp->t_outq.c_cc > hiwat) goto ovhiwat; } } ttstart(tp); return(NULL); ovhiwat: (void) spl5(); u.u_base -= cc; u.u_offset -= cc; u.u_count += cc; if (tp->t_outq.c_cc <= hiwat) { (void) spl0(); goto loop; } ttstart(tp); tp->t_state |= ASLEEP; if (tp->t_chan && u.u_segflg == 0 && (getf(u.u_ap[0])->f_flag&FMP)) { (void) spl0(); return ((caddr_t)&tp->t_outq); } sleep((caddr_t)&tp->t_outq, TTOPRI); (void) spl0(); goto loop; } /* * Rubout one character from the rawq of tp * as cleanly as possible. */ ntyrub(c, tp) register c; register struct tty *tp; { register char *cp; register int savecol; int s; char *nextc(); if ((tp->t_flags&ECHO)==0) return; tp->t_local &= ~LFLUSHO; c &= 0377; if (tp->t_local&LCRTBS) { if (tp->t_rocount == 0) { /* * Screwed by ttwrite; retype */ ntyretype(tp); return; } if (c==('\t'|0200) || c==('\n'|0200)) ntyrubo(tp, 2); else switch(partab[c&=0177] & 0177) { case ORDINARY: if (tp->t_flags&LCASE && c >= 'A' && c <= 'Z') ntyrubo(tp, 2); else ntyrubo(tp, 1); break; case VTAB: case BACKSPACE: case CONTROL: case RETURN: if (tp->t_local & LCTLECH) ntyrubo(tp, 2); break; case TAB: if (tp->t_rocount < tp->t_rawq.c_cc) { ntyretype(tp); return; } s = spl5(); savecol = tp->t_col; tp->t_lstate |= LSCNTTB; tp->t_local |= LFLUSHO; tp->t_col = tp->t_rocol; for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) ntyecho(*cp, tp); tp->t_local &= ~LFLUSHO; tp->t_lstate &= ~LSCNTTB; splx(s); /* * savecol will now be length of the tab */ savecol -= tp->t_col; tp->t_col += savecol; if (savecol > 8) savecol = 8; /* overflow screw */ while (--savecol >= 0) (void) ntyoutput('\b', tp); break; default: panic("ttyrub"); } } else if (tp->t_local&LPRTERA) { if ((tp->t_lstate&LSERASE) == 0) { (void) ntyoutput('\\', tp); tp->t_lstate |= LSERASE; } ntyecho(c, tp); } else ntyecho(tp->t_erase, tp); tp->t_rocount--; } /* * Crt back over cnt chars perhaps * erasing them. */ ntyrubo(tp, cnt) register struct tty *tp; int cnt; { while (--cnt >= 0) ntyout(tp->t_local&LCRTERA ? "\b \b" : "\b", tp); } /* * Reprint the rawq line. * We assume c_cc has already been checked. */ ntyretype(tp) register struct tty *tp; { register char *cp; char *nextc(); int s; if (tlun.t_rprntc != 0377) ntyecho(tlun.t_rprntc, tp); (void) ntyoutput('\n', tp); s = spl5(); for (cp = tp->t_canq.c_cf; cp; cp = nextc(&tp->t_canq, cp)) ntyecho(*cp, tp); for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) ntyecho(*cp, tp); tp->t_lstate &= ~LSERASE; splx(s); tp->t_rocount = tp->t_rawq.c_cc; tp->t_rocol = 0; } /* * Echo a typed character to the terminal */ ntyecho(c, tp) register c; register struct tty *tp; { if ((tp->t_lstate & LSCNTTB) == 0) tp->t_local &= ~LFLUSHO; if ((tp->t_flags&ECHO) == 0 || (c == '\033' && c == tun.t_brkc)) return; /* ers(bbn) 11aug81 */ c &= 0377; if (tp->t_flags&RAW) { (void) ntyoutput(c, tp); return; } if (c == '\r' && tp->t_flags&CRMOD) c = '\n'; if (tp->t_local&LCTLECH) { if ((c&0177) <= 037 && c!='\t' && c!='\n' || (c&0177)==0177) { (void) ntyoutput('^', tp); c &= 0177; if (c == 0177) c = '?'; else if (tp->t_flags&LCASE) c += 'a' - 1; else c += 'A' - 1; } } (void) ntyoutput(c & 0177, tp); } /* * Is c a break char for tp? */ ntbreakc(c, tp) register c; register struct tty *tp; { return (c == '\n' || c == tun.t_eofc || c == tun.t_brkc || c == '\r' && (tp->t_flags&CRMOD)); } /* * send string cp to tp */ ntyout(cp, tp) register char *cp; register struct tty *tp; { register char c; while (c = *cp++) (void) ntyoutput(c, tp); }