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/* $OpenBSD: setterm.c,v 1.8 2013/12/13 22:54:08 naddy Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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. 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/ioctl.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <limits.h>
#include "curses.h"
static void zap(void);
static char *sflags[] = {
/* am bs da eo hc in mi ms */
&AM, &BS, &DA, &EO, &HC, &IN, &MI, &MS,
/* nc ns os ul xb xn xt xs xx */
&NC, &NS, &OS, &UL, &XB, &XN, &XT, &XS, &XX
};
static char *_PC,
**sstrs[] = {
/* AL bc bt cd ce cl cm cr cs */
&AL, &BC, &BT, &CD, &CE, &CL, &CM, &CR, &CS,
/* dc DL dm do ed ei k0 k1 k2 */
&DC, &DL, &DM, &DO, &ED, &EI, &K0, &K1, &K2,
/* k3 k4 k5 k6 k7 k8 k9 ho ic */
&K3, &K4, &K5, &K6, &K7, &K8, &K9, &HO, &IC,
/* im ip kd ke kh kl kr ks ku */
&IM, &IP, &KD, &KE, &KH, &KL, &KR, &KS, &KU,
/* ll ma nd nl pc rc sc se SF */
&LL, &MA, &ND, &NL, &_PC, &RC, &SC, &SE, &SF,
/* so SR ta te ti uc ue up us */
&SO, &SR, &TA, &TE, &TI, &UC, &UE, &UP, &US,
/* vb vs ve al dl sf sr AL */
&VB, &VS, &VE, &al, &dl, &sf, &sr, &AL_PARM,
/* DL UP DO LE */
&DL_PARM, &UP_PARM, &DOWN_PARM, &LEFT_PARM,
/* RI */
&RIGHT_PARM,
};
static char *aoftspace; /* Address of _tspace for relocation */
static char tspace[2048]; /* Space for capability strings */
char *ttytype;
int
setterm(type)
register char *type;
{
static char genbuf[1024];
static char __ttytype[1024];
register int unknown;
struct winsize win;
char *p;
#ifdef DEBUG
__CTRACE("setterm: (\"%s\")\nLINES = %d, COLS = %d\n",
type, LINES, COLS);
#endif
if (type[0] == '\0')
type = "xx";
unknown = 0;
if (tgetent(genbuf, type) != 1) {
unknown++;
strlcpy(genbuf, "xx|dumb:", sizeof(genbuf));
}
#ifdef DEBUG
__CTRACE("setterm: tty = %s\n", type);
#endif
/* Try TIOCGSIZE, and, if it fails, the termcap entry. */
if (ioctl(STDERR_FILENO, TIOCGWINSZ, &win) != -1 &&
win.ws_row != 0 && win.ws_col != 0) {
LINES = win.ws_row;
COLS = win.ws_col;
} else {
LINES = tgetnum("li");
COLS = tgetnum("co");
}
/* POSIX 1003.2 requires that the environment override. */
if ((p = getenv("LINES")) != NULL) {
long l = strtol(p, &p, 10);
if (l > 0 && l < INT_MAX && *p == '\0')
LINES = (int)l;
}
if ((p = getenv("COLUMNS")) != NULL) {
long l = strtol(p, &p, 10);
if (l > 0 && l < INT_MAX && *p == '\0')
COLS = (int)l;
}
/*
* Want cols > 4, otherwise things will fail.
*/
if (COLS <= 4)
return (ERR);
#ifdef DEBUG
__CTRACE("setterm: LINES = %d, COLS = %d\n", LINES, COLS);
#endif
aoftspace = tspace;
zap(); /* Get terminal description. */
/* If we can't tab, we can't backtab, either. */
if (!GT)
BT = NULL;
/*
* Test for cursor motion capbility.
*
* XXX
* This is truly stupid -- tgoto returns "OOPS" if it can't
* do cursor motions.
*/
if (tgoto(CM, 0, 0)[0] == 'O') {
CA = 0;
CM = 0;
} else
CA = 1;
PC = _PC ? _PC[0] : 0;
aoftspace = tspace;
ttytype = longname(genbuf, __ttytype);
/* If no scrolling commands, no quick change. */
__noqch =
(CS == NULL || HO == NULL ||
SF == NULL && sf == NULL || SR == NULL && sr == NULL) &&
(AL == NULL && al == NULL || DL == NULL && dl == NULL);
return (unknown ? ERR : OK);
}
/*
* zap --
* Gets all the terminal flags from the termcap database.
*/
static void
zap()
{
register char *namp, ***sp;
register char **fp;
char tmp[3];
#ifdef DEBUG
register char *cp;
#endif
tmp[2] = '\0';
namp = "ambsdaeohcinmimsncnsosulxbxnxtxsxx";
fp = sflags;
do {
*tmp = *namp;
*(tmp + 1) = *(namp + 1);
*(*fp++) = tgetflag(tmp);
#ifdef DEBUG
__CTRACE("2.2s = %s\n", namp, *fp[-1] ? "TRUE" : "FALSE");
#endif
namp += 2;
} while (*namp);
namp = "ALbcbtcdceclcmcrcsdcDLdmdoedeik0k1k2k3k4k5k6k7k8k9hoicimipkdkekhklkrkskullmandnlpcrcscseSFsoSRtatetiucueupusvbvsvealdlsfsrALDLUPDOLERI";
sp = sstrs;
do {
*tmp = *namp;
*(tmp + 1) = *(namp + 1);
*(*sp++) = tgetstr(tmp, &aoftspace);
#ifdef DEBUG
__CTRACE("2.2s = %s", namp, *sp[-1] == NULL ? "NULL\n" : "\"");
if (*sp[-1] != NULL) {
for (cp = *sp[-1]; *cp; cp++)
__CTRACE("%s", unctrl(*cp));
__CTRACE("\"\n");
}
#endif
namp += 2;
} while (*namp);
if (XS)
SO = SE = NULL;
else {
if (tgetnum("sg") > 0)
SO = NULL;
if (tgetnum("ug") > 0)
US = NULL;
if (!SO && US) {
SO = US;
SE = UE;
}
}
}
/*
* getcap --
* Return a capability from termcap.
*/
char *
getcap(name)
char *name;
{
return (tgetstr(name, &aoftspace));
}
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