[apple/shell_cmds.git] / window / wwinit.c

/*	$NetBSD: wwinit.c,v 1.12 1997/11/21 08:37:26 lukem Exp $	*/

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)wwinit.c	8.2 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: wwinit.c,v 1.12 1997/11/21 08:37:26 lukem Exp $");
#endif
#endif /* not lint */

#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#ifdef __APPLE__
#include <curses.h>
#else
#include <termcap.h>
#endif
#include "ww.h"
#include "tt.h"
#include "xx.h"
#include "char.h"

int
wwinit()
{
	int i, j;
	char *kp;
	sigset_t sigset, osigset;

	wwdtablesize = 3;
	wwhead.ww_forw = &wwhead;
	wwhead.ww_back = &wwhead;

	sigemptyset(&sigset);
	sigaddset(&sigset, SIGCHLD);
	sigaddset(&sigset, SIGALRM);
	sigaddset(&sigset, SIGHUP);
	sigaddset(&sigset, SIGTERM);
	sigprocmask(SIG_BLOCK, &sigset, &osigset);

	if (signal(SIGCHLD, wwchild) == BADSIG ||
	    signal(SIGHUP, wwquit) == BADSIG ||
	    signal(SIGTERM, wwquit) == BADSIG ||
	    signal(SIGPIPE, SIG_IGN) == BADSIG) {
		wwerrno = WWE_SYS;
		return -1;
	}

	if (wwgettty(0, &wwoldtty) < 0)
		return -1;
	wwwintty = wwoldtty;
#ifdef OLD_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
#ifndef OXTABS
#define OXTABS XTABS
#endif
#ifndef _POSIX_VDISABLE
#define _POSIX_VDISABLE -1
#endif
	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_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 < NCCS; i++)
		wwnewtty.ww_termios.c_cc[i] = _POSIX_VDISABLE;
	wwnewtty.ww_termios.c_cc[VMIN] = 1;
	wwnewtty.ww_termios.c_cc[VTIME] = 0;
#endif
	if (wwsettty(0, &wwnewtty) < 0)
		goto bad;

	if ((wwterm = getenv("TERM")) == 0) {
		wwerrno = WWE_BADTERM;
		goto bad;
	}
	if (tgetent(wwtermcap, wwterm) != 1) {
		wwerrno = WWE_BADTERM;
		goto bad;
	}
#ifdef OLD_TTY
	wwospeed = wwoldtty.ww_sgttyb.sg_ospeed;
#else
	wwospeed = cfgetospeed(&wwoldtty.ww_termios);
	wwbaud = wwospeed;
#endif
	switch (wwospeed) {
	default:
	case B0:
		wwbaud = 0;
		break;
	case B50:
		wwbaud = 50;
		break;
	case B75:
		wwbaud = 75;
		break;
	case B110:
		wwbaud = 110;
		break;
	case B134:
		wwbaud = 134;
		break;
	case B150:
		wwbaud = 150;
		break;
	case B200:
		wwbaud = 200;
		break;
	case B300:
		wwbaud = 300;
		break;
	case B600:
		wwbaud = 600;
		break;
	case B1200:
		wwbaud = 1200;
		break;
	case B1800:
		wwbaud = 1800;
		break;
	case B2400:
		wwbaud = 2400;
		break;
	case B4800:
		wwbaud = 4800;
		break;
	case B9600:
		wwbaud = 9600;
		break;
#ifdef B19200
	case B19200:
#else
	case EXTA:
#endif
		wwbaud = 19200;
		break;
#ifdef B38400
	case B38400:
#else
	case EXTB:
#endif
		wwbaud = 38400;
		break;
#ifdef B57600
	case B57600:
		wwbaud= 57600;
		break;
#endif
#ifdef B115200
	case B115200:
		wwbaud = 115200;
		break;
#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;

	wwsmap = (unsigned char **)
		wwalloc(0, 0, wwnrow, wwncol, sizeof (unsigned char));
	if (wwsmap == 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;
	/* wwos is cleared in wwstart1() */
	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 = ' ';
	if (tt.tt_checkpoint) {
		/* wwcs is also cleared in wwstart1() */
		wwcs = (union ww_char **)
			wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
		if (wwcs == 0)
			goto bad;
	}

	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);
#ifdef TERMINFO
	if (wwterminfoinit() < 0)
		goto bad;
#endif

	if (tt.tt_checkpoint)
		if (signal(SIGALRM, wwalarm) == BADSIG) {
			wwerrno = WWE_SYS;
			goto bad;
		}
	wwstart1();

	sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
	return 0;

bad:
	/*
	 * Don't bother to free storage.  We're supposed
	 * to exit when wwinit fails anyway.
	 */
	(void) wwsettty(0, &wwoldtty);

	sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
	return -1;
}

void
wwaddcap(cap, kp)
	char *cap;
	char **kp;
{
	char tbuf[512];
	char *tp = tbuf;
	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;
	}
}

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

void
wwstart()
{
	int i;

	(void) wwsettty(0, &wwnewtty);
	for (i = 0; i < wwnrow; i++)
		wwtouched[i] = WWU_TOUCHED;
	wwstart1();
}

void
wwstart1()
{
	int i, j;

	for (i = 0; i < wwnrow; i++)
		for (j = 0; j < wwncol; j++) {
			wwos[i][j].c_w = ' ';
			if (tt.tt_checkpoint)
				wwcs[i][j].c_w = ' ';
		}
	xxstart();
	if (tt.tt_checkpoint)
		wwdocheckpoint = 1;
}

/*
 * Reset data structures and terminal from an unknown state.
 * Restoring wwos has been taken care of elsewhere.
 */
void
wwreset()
{
	int i;

	xxreset();
	for (i = 0; i < wwnrow; i++)
		wwtouched[i] = WWU_TOUCHED;
}
Commit	Line	Data
44bd5ea7 A	1	/* $NetBSD: wwinit.c,v 1.12 1997/11/21 08:37:26 lukem Exp $ */
	2
	3	/*
	4	* Copyright (c) 1983, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* This code is derived from software contributed to Berkeley by
	8	* Edward Wang at The University of California, Berkeley.
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in the
	17	* documentation and/or other materials provided with the distribution.
	18	* 3. All advertising materials mentioning features or use of this software
	19	* must display the following acknowledgement:
	20	* This product includes software developed by the University of
	21	* California, Berkeley and its contributors.
	22	* 4. Neither the name of the University nor the names of its contributors
	23	* may be used to endorse or promote products derived from this software
	24	* without specific prior written permission.
	25	*
	26	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	27	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	29	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	30	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	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
	39	#include <sys/cdefs.h>
	40	#ifndef lint
	41	#if 0
	42	static char sccsid[] = "@(#)wwinit.c 8.2 (Berkeley) 4/28/95";
	43	#else
	44	__RCSID("$NetBSD: wwinit.c,v 1.12 1997/11/21 08:37:26 lukem Exp $");
	45	#endif
	46	#endif /* not lint */
	47
	48	#include <fcntl.h>
	49	#include <signal.h>
	50	#include <stdlib.h>
	51	#include <stdio.h>
	52	#ifdef __APPLE__
	53	#include <curses.h>
	54	#else
	55	#include <termcap.h>
	56	#endif
	57	#include "ww.h"
	58	#include "tt.h"
	59	#include "xx.h"
	60	#include "char.h"
	61
	62	int
	63	wwinit()
	64	{
65	int i, j;
66	char *kp;
67	sigset_t sigset, osigset;
68
69	wwdtablesize = 3;
70	wwhead.ww_forw = &wwhead;
71	wwhead.ww_back = &wwhead;
72
73	sigemptyset(&sigset);
74	sigaddset(&sigset, SIGCHLD);
75	sigaddset(&sigset, SIGALRM);
76	sigaddset(&sigset, SIGHUP);
77	sigaddset(&sigset, SIGTERM);
78	sigprocmask(SIG_BLOCK, &sigset, &osigset);
79
80	if (signal(SIGCHLD, wwchild) == BADSIG \|\|
81	signal(SIGHUP, wwquit) == BADSIG \|\|
82	signal(SIGTERM, wwquit) == BADSIG \|\|
83	signal(SIGPIPE, SIG_IGN) == BADSIG) {
84	wwerrno = WWE_SYS;
85	return -1;
86	}
87
88	if (wwgettty(0, &wwoldtty) < 0)
89	return -1;
90	wwwintty = wwoldtty;
91	#ifdef OLD_TTY
92	wwwintty.ww_sgttyb.sg_flags &= ~XTABS;
93	wwnewtty.ww_sgttyb = wwoldtty.ww_sgttyb;
94	wwnewtty.ww_sgttyb.sg_erase = -1;
95	wwnewtty.ww_sgttyb.sg_kill = -1;
96	wwnewtty.ww_sgttyb.sg_flags \|= CBREAK;
97	wwnewtty.ww_sgttyb.sg_flags &= ~(ECHO\|CRMOD);
98	wwnewtty.ww_tchars.t_intrc = -1;
99	wwnewtty.ww_tchars.t_quitc = -1;
100	wwnewtty.ww_tchars.t_startc = -1;
101	wwnewtty.ww_tchars.t_stopc = -1;
102	wwnewtty.ww_tchars.t_eofc = -1;
103	wwnewtty.ww_tchars.t_brkc = -1;
104	wwnewtty.ww_ltchars.t_suspc = -1;
105	wwnewtty.ww_ltchars.t_dsuspc = -1;
106	wwnewtty.ww_ltchars.t_rprntc = -1;
107	wwnewtty.ww_ltchars.t_flushc = -1;
108	wwnewtty.ww_ltchars.t_werasc = -1;
109	wwnewtty.ww_ltchars.t_lnextc = -1;
110	wwnewtty.ww_lmode = wwoldtty.ww_lmode \| LLITOUT;
111	wwnewtty.ww_ldisc = wwoldtty.ww_ldisc;
112	#else
113	#ifndef OXTABS
114	#define OXTABS XTABS
115	#endif
116	#ifndef _POSIX_VDISABLE
117	#define _POSIX_VDISABLE -1
118	#endif
119	wwwintty.ww_termios.c_oflag &= ~OXTABS;
120	wwnewtty.ww_termios = wwoldtty.ww_termios;
121	wwnewtty.ww_termios.c_iflag &=
122	~(ISTRIP \| INLCR \| IGNCR \| ICRNL \| IXON \| IXOFF \| IMAXBEL);
123	wwnewtty.ww_termios.c_oflag = 0;
124	wwnewtty.ww_termios.c_cflag &= ~(CSIZE \| PARENB);
125	wwnewtty.ww_termios.c_cflag \|= CS8;
126	wwnewtty.ww_termios.c_lflag = 0;
127	for (i = 0; i < NCCS; i++)
128	wwnewtty.ww_termios.c_cc[i] = _POSIX_VDISABLE;
129	wwnewtty.ww_termios.c_cc[VMIN] = 1;
130	wwnewtty.ww_termios.c_cc[VTIME] = 0;
131	#endif
132	if (wwsettty(0, &wwnewtty) < 0)
133	goto bad;
134
135	if ((wwterm = getenv("TERM")) == 0) {
136	wwerrno = WWE_BADTERM;
137	goto bad;
138	}
139	if (tgetent(wwtermcap, wwterm) != 1) {
140	wwerrno = WWE_BADTERM;
141	goto bad;
142	}
143	#ifdef OLD_TTY
144	wwospeed = wwoldtty.ww_sgttyb.sg_ospeed;
145	#else
146	wwospeed = cfgetospeed(&wwoldtty.ww_termios);
147	wwbaud = wwospeed;
148	#endif
149	switch (wwospeed) {
150	default:
151	case B0:
152	wwbaud = 0;
153	break;
154	case B50:
155	wwbaud = 50;
156	break;
157	case B75:
158	wwbaud = 75;
159	break;
160	case B110:
161	wwbaud = 110;
162	break;
163	case B134:
164	wwbaud = 134;
165	break;
166	case B150:
167	wwbaud = 150;
168	break;
169	case B200:
170	wwbaud = 200;
171	break;
172	case B300:
173	wwbaud = 300;
174	break;
175	case B600:
176	wwbaud = 600;
177	break;
178	case B1200:
179	wwbaud = 1200;
180	break;
181	case B1800:
182	wwbaud = 1800;
183	break;
184	case B2400:
185	wwbaud = 2400;
186	break;
187	case B4800:
188	wwbaud = 4800;
189	break;
190	case B9600:
191	wwbaud = 9600;
192	break;
193	#ifdef B19200
194	case B19200:
195	#else
196	case EXTA:
197	#endif
198	wwbaud = 19200;
199	break;
200	#ifdef B38400
201	case B38400:
202	#else
203	case EXTB:
204	#endif
205	wwbaud = 38400;
206	break;
207	#ifdef B57600
208	case B57600:
209	wwbaud= 57600;
210	break;
211	#endif
212	#ifdef B115200
213	case B115200:
214	wwbaud = 115200;
215	break;
216	#endif
217	}
218
219	if (xxinit() < 0)
220	goto bad;
221	wwnrow = tt.tt_nrow;
222	wwncol = tt.tt_ncol;
223	wwavailmodes = tt.tt_availmodes;
224	wwwrap = tt.tt_wrap;
225
226	if (wwavailmodes & WWM_REV)
227	wwcursormodes = WWM_REV \| (wwavailmodes & WWM_BLK);
228	else if (wwavailmodes & WWM_UL)
229	wwcursormodes = WWM_UL;
230
231	if ((wwib = malloc((unsigned) 512)) == 0)
232	goto bad;
233	wwibe = wwib + 512;
234	wwibq = wwibp = wwib;
235
236	wwsmap = (unsigned char **)
237	wwalloc(0, 0, wwnrow, wwncol, sizeof (unsigned char));
238	if (wwsmap == 0)
239	goto bad;
240	for (i = 0; i < wwnrow; i++)
241	for (j = 0; j < wwncol; j++)
242	wwsmap[i][j] = WWX_NOBODY;
243
244	wwos = (union ww_char **)
245	wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
246	if (wwos == 0)
247	goto bad;
248	/* wwos is cleared in wwstart1() */
249	wwns = (union ww_char **)
250	wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
251	if (wwns == 0)
252	goto bad;
253	for (i = 0; i < wwnrow; i++)
254	for (j = 0; j < wwncol; j++)
255	wwns[i][j].c_w = ' ';
256	if (tt.tt_checkpoint) {
257	/* wwcs is also cleared in wwstart1() */
258	wwcs = (union ww_char **)
259	wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
260	if (wwcs == 0)
261	goto bad;
262	}
263
264	wwtouched = malloc((unsigned) wwnrow);
265	if (wwtouched == 0) {
266	wwerrno = WWE_NOMEM;
267	goto bad;
268	}
269	for (i = 0; i < wwnrow; i++)
270	wwtouched[i] = 0;
271
272	wwupd = (struct ww_update ) malloc((unsigned) wwnrow sizeof *wwupd);
273	if (wwupd == 0) {
274	wwerrno = WWE_NOMEM;
275	goto bad;
276	}
277
278	wwindex[WWX_NOBODY] = &wwnobody;
279	wwnobody.ww_order = NWW;
280
281	kp = wwwintermcap;
282	if (wwavailmodes & WWM_REV)
283	wwaddcap1(WWT_REV, &kp);
284	if (wwavailmodes & WWM_BLK)
285	wwaddcap1(WWT_BLK, &kp);
286	if (wwavailmodes & WWM_UL)
287	wwaddcap1(WWT_UL, &kp);
288	if (wwavailmodes & WWM_GRP)
289	wwaddcap1(WWT_GRP, &kp);
290	if (wwavailmodes & WWM_DIM)
291	wwaddcap1(WWT_DIM, &kp);
292	if (wwavailmodes & WWM_USR)
293	wwaddcap1(WWT_USR, &kp);
294	if ((tt.tt_insline && tt.tt_delline) \|\| tt.tt_setscroll)
295	wwaddcap1(WWT_ALDL, &kp);
296	if (tt.tt_inschar)
297	wwaddcap1(WWT_IMEI, &kp);
298	if (tt.tt_insspace)
299	wwaddcap1(WWT_IC, &kp);
300	if (tt.tt_delchar)
301	wwaddcap1(WWT_DC, &kp);
302	wwaddcap("kb", &kp);
303	wwaddcap("ku", &kp);
304	wwaddcap("kd", &kp);
305	wwaddcap("kl", &kp);
306	wwaddcap("kr", &kp);
307	wwaddcap("kh", &kp);
308	if ((j = tgetnum("kn")) >= 0) {
309	char cap[32];
310
311	(void) sprintf(kp, "kn#%d:", j);
312	for (; *kp; kp++)
313	;
314	for (i = 1; i <= j; i++) {
315	(void) sprintf(cap, "k%d", i);
316	wwaddcap(cap, &kp);
317	cap[0] = 'l';
318	wwaddcap(cap, &kp);
319	}
320	}
321	/*
322	* It's ok to do this here even if setenv() is destructive
323	* since tt_init() has already made its own copy of it and
324	* wwterm now points to the copy.
325	*/
326	(void) setenv("TERM", WWT_TERM, 1);
327	#ifdef TERMINFO
328	if (wwterminfoinit() < 0)
329	goto bad;
330	#endif
331
332	if (tt.tt_checkpoint)
333	if (signal(SIGALRM, wwalarm) == BADSIG) {
334	wwerrno = WWE_SYS;
335	goto bad;
336	}
337	wwstart1();
338
339	sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
340	return 0;
341
342	bad:
343	/*
344	* Don't bother to free storage. We're supposed
345	* to exit when wwinit fails anyway.
346	*/
347	(void) wwsettty(0, &wwoldtty);
348
349	sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
350	return -1;
351	}
352
353	void
354	wwaddcap(cap, kp)
355	char *cap;
356	char **kp;
357	{
358	char tbuf[512];
359	char *tp = tbuf;
360	char str, p;
361
362	if ((str = tgetstr(cap, &tp)) != 0) {
363	while (((kp)++ = *cap++))
364	;
365	(*kp)[-1] = '=';
366	while (*str) {
367	for (p = unctrl(str++); ((kp)++ = p++);)
368	;
369	(*kp)--;
370	}
371	(kp)++ = ':';
372	**kp = 0;
373	}
374	}
375
376	void
377	wwaddcap1(cap, kp)
378	char *cap;
379	char **kp;
380	{
381	while (((kp)++ = *cap++))
382	;
383	(*kp)--;
384	}
385
386	void
387	wwstart()
388	{
389	int i;
390
391	(void) wwsettty(0, &wwnewtty);
392	for (i = 0; i < wwnrow; i++)
393	wwtouched[i] = WWU_TOUCHED;
394	wwstart1();
395	}
396
397	void
398	wwstart1()
399	{
400	int i, j;
401
402	for (i = 0; i < wwnrow; i++)
403	for (j = 0; j < wwncol; j++) {
404	wwos[i][j].c_w = ' ';
405	if (tt.tt_checkpoint)
406	wwcs[i][j].c_w = ' ';
407	}
408	xxstart();
409	if (tt.tt_checkpoint)
410	wwdocheckpoint = 1;
411	}
412
413	/*
414	* Reset data structures and terminal from an unknown state.
415	* Restoring wwos has been taken care of elsewhere.
416	*/
417	void
418	wwreset()
419	{
420	int i;
421
422	xxreset();
423	for (i = 0; i < wwnrow; i++)
424	wwtouched[i] = WWU_TOUCHED;
425	}