usr/src/usr.bin/window/wwinit.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)wwinit.c    3.37 (Berkeley) %G%";
#endif /* not lint */

#include "ww.h"
#include "tt.h"
#include <sys/signal.h>
#include <fcntl.h>
#include "char.h"

wwinit()
{
        register i, j;
        char *kp;
        int s;

        wwdtablesize = getdtablesize();
        wwhead.ww_forw = &wwhead;
        wwhead.ww_back = &wwhead;

        s = sigblock(sigmask(SIGIO));
        if (signal(SIGIO, wwrint) == BADSIG ||
            signal(SIGCHLD, wwchild) == BADSIG ||
            signal(SIGPIPE, SIG_IGN) == BADSIG) {
                wwerrno = WWE_SYS;
                return -1;
        }

        if (wwgettty(0, &wwoldtty) < 0)
                return -1;
        wwwintty = wwoldtty;
#ifndef POSIX_TTY
        wwwintty.ww_sgttyb.sg_flags &= ~XTABS;
        wwnewtty.ww_sgttyb = wwoldtty.ww_sgttyb;
        wwnewtty.ww_sgttyb.sg_erase = -1;
        wwnewtty.ww_sgttyb.sg_kill = -1;
        wwnewtty.ww_sgttyb.sg_flags |= CBREAK;
        wwnewtty.ww_sgttyb.sg_flags &= ~(ECHO|CRMOD);
        wwnewtty.ww_tchars.t_intrc = -1;
        wwnewtty.ww_tchars.t_quitc = -1;
        wwnewtty.ww_tchars.t_startc = -1;
        wwnewtty.ww_tchars.t_stopc = -1;
        wwnewtty.ww_tchars.t_eofc = -1;
        wwnewtty.ww_tchars.t_brkc = -1;
        wwnewtty.ww_ltchars.t_suspc = -1;
        wwnewtty.ww_ltchars.t_dsuspc = -1;
        wwnewtty.ww_ltchars.t_rprntc = -1;
        wwnewtty.ww_ltchars.t_flushc = -1;
        wwnewtty.ww_ltchars.t_werasc = -1;
        wwnewtty.ww_ltchars.t_lnextc = -1;
        wwnewtty.ww_lmode = wwoldtty.ww_lmode | LLITOUT;
        wwnewtty.ww_ldisc = wwoldtty.ww_ldisc;
#else
        wwwintty.ww_termios.c_oflag &= ~OXTABS;
        wwnewtty.ww_termios = wwoldtty.ww_termios;
        wwnewtty.ww_termios.c_iflag &=
                ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXOFF | IMAXBEL);
        wwnewtty.ww_termios.c_iflag |= INPCK;
        wwnewtty.ww_termios.c_oflag = 0;
        wwnewtty.ww_termios.c_cflag &= ~(CSIZE | PARENB);
        wwnewtty.ww_termios.c_cflag |= CS8;
        wwnewtty.ww_termios.c_lflag = 0;
        for (i = 0; i < NCC; i++)
                wwnewtty.ww_termios.c_cc[i] = _POSIX_VDISABLE;
#endif
        wwnewtty.ww_fflags = wwoldtty.ww_fflags | FASYNC;
        if (wwsettty(0, &wwnewtty, &wwoldtty) < 0)
                goto bad;

        if ((wwterm = getenv("TERM")) == 0) {
                wwerrno = WWE_BADTERM;
                goto bad;
        }
        if (tgetent(wwtermcap, wwterm) != 1) {
                wwerrno = WWE_BADTERM;
                goto bad;
        }
#ifndef POSIX_TTY
        wwbaud = wwbaudmap[wwoldtty.ww_sgttyb.sg_ospeed];
#else
#ifdef CBAUD
        wwbaud = wwbaudmap[wwoldtty.ww_termios.c_cflag & CBAUD];
#else
        wwbaud = wwoldtty.ww_termios.c_ospeed;
#endif
#endif

        if (xxinit() < 0)
                goto bad;
        wwnrow = tt.tt_nrow;
        wwncol = tt.tt_ncol;
        wwavailmodes = tt.tt_availmodes;
        wwwrap = tt.tt_wrap;

        if (wwavailmodes & WWM_REV)
                wwcursormodes = WWM_REV | wwavailmodes & WWM_BLK;
        else if (wwavailmodes & WWM_UL)
                wwcursormodes = WWM_UL;

        if ((wwib = malloc((unsigned) 512)) == 0)
                goto bad;
        wwibe = wwib + 512;
        wwibq = wwibp = wwib;

        if ((wwsmap = wwalloc(0, 0, wwnrow, wwncol, sizeof (char))) == 0)
                goto bad;
        for (i = 0; i < wwnrow; i++)
                for (j = 0; j < wwncol; j++)
                        wwsmap[i][j] = WWX_NOBODY;

        wwos = (union ww_char **)
                wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
        if (wwos == 0)
                goto bad;
        for (i = 0; i < wwnrow; i++)
                for (j = 0; j < wwncol; j++)
                        wwos[i][j].c_w = ' ';
        wwns = (union ww_char **)
                wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
        if (wwns == 0)
                goto bad;
        for (i = 0; i < wwnrow; i++)
                for (j = 0; j < wwncol; j++)
                        wwns[i][j].c_w = ' ';

        wwtouched = malloc((unsigned) wwnrow);
        if (wwtouched == 0) {
                wwerrno = WWE_NOMEM;
                goto bad;
        }
        for (i = 0; i < wwnrow; i++)
                wwtouched[i] = 0;

        wwupd = (struct ww_update *) malloc((unsigned) wwnrow * sizeof *wwupd);
        if (wwupd == 0) {
                wwerrno = WWE_NOMEM;
                goto bad;
        }

        wwindex[WWX_NOBODY] = &wwnobody;
        wwnobody.ww_order = NWW;

        kp = wwwintermcap;
        if (wwavailmodes & WWM_REV)
                wwaddcap1(WWT_REV, &kp);
        if (wwavailmodes & WWM_BLK)
                wwaddcap1(WWT_BLK, &kp);
        if (wwavailmodes & WWM_UL)
                wwaddcap1(WWT_UL, &kp);
        if (wwavailmodes & WWM_GRP)
                wwaddcap1(WWT_GRP, &kp);
        if (wwavailmodes & WWM_DIM)
                wwaddcap1(WWT_DIM, &kp);
        if (wwavailmodes & WWM_USR)
                wwaddcap1(WWT_USR, &kp);
        if (tt.tt_insline && tt.tt_delline || tt.tt_setscroll)
                wwaddcap1(WWT_ALDL, &kp);
        if (tt.tt_inschar)
                wwaddcap1(WWT_IMEI, &kp);
        if (tt.tt_insspace)
                wwaddcap1(WWT_IC, &kp);
        if (tt.tt_delchar)
                wwaddcap1(WWT_DC, &kp);
        wwaddcap("kb", &kp);
        wwaddcap("ku", &kp);
        wwaddcap("kd", &kp);
        wwaddcap("kl", &kp);
        wwaddcap("kr", &kp);
        wwaddcap("kh", &kp);
        if ((j = tgetnum("kn")) >= 0) {
                char cap[32];

                (void) sprintf(kp, "kn#%d:", j);
                for (; *kp; kp++)
                        ;
                for (i = 1; i <= j; i++) {
                        (void) sprintf(cap, "k%d", i);
                        wwaddcap(cap, &kp);
                        cap[0] = 'l';
                        wwaddcap(cap, &kp);
                }
        }
        /*
         * It's ok to do this here even if setenv() is destructive
         * since tt_init() has already made its own copy of it and
         * wwterm now points to the copy.
         */
        (void) setenv("TERM", WWT_TERM, 1);

        (void) sigsetmask(s);
        /* catch typeahead before ASYNC was set */
        (void) kill(getpid(), SIGIO);
        xxstart();
        return 0;
bad:
        /*
         * Don't bother to free storage.  We're supposed
         * to exit when wwinit fails anyway.
         */
        (void) wwsettty(0, &wwoldtty, &wwnewtty);
        (void) signal(SIGIO, SIG_DFL);
        (void) sigsetmask(s);
        return -1;
}

wwaddcap(cap, kp)
        register char *cap;
        register char **kp;
{
        char tbuf[512];
        char *tp = tbuf;
        register char *str, *p;

        if ((str = tgetstr(cap, &tp)) != 0) {
                while (*(*kp)++ = *cap++)
                        ;
                (*kp)[-1] = '=';
                while (*str) {
                        for (p = unctrl(*str++); *(*kp)++ = *p++;)
                                ;
                        (*kp)--;
                }
                *(*kp)++ = ':';
                **kp = 0;
        }
}

wwaddcap1(cap, kp)
        register char *cap;
        register char **kp;
{
        while (*(*kp)++ = *cap++)
                ;
        (*kp)--;
}