243 lines
6.6 KiB
C
243 lines
6.6 KiB
C
/* $NetBSD: setterm.c,v 1.12 1999/06/28 13:32:43 simonb Exp $ */
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/*
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* Copyright (c) 1981, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)setterm.c 8.8 (Berkeley) 10/25/94";
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#else
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__RCSID("$NetBSD: setterm.c,v 1.12 1999/06/28 13:32:43 simonb Exp $");
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#endif
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#endif /* not lint */
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#include <sys/ioctl.h> /* TIOCGWINSZ on old systems. */
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include "curses.h"
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static void zap __P((void));
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static char *sflags[] = {
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/* am bs da eo hc in mi ms */
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&AM, &BS, &DA, &EO, &HC, &IN, &MI, &MS,
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/* nc ns os ul xb xn xt xs xx */
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&NC, &NS, &OS, &UL, &XB, &XN, &XT, &XS, &XX
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};
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static char *_PC,
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**sstrs[] = {
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/* AL bc bl bt cd ce cl cm cr */
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&AL, &BC, &BL, &BT, &CD, &CE, &CL, &CM, &CR,
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/* cs dc DL dm do ed ei k0 k1 */
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&CS, &DC, &DL, &DM, &DO, &ED, &EI, &K0, &K1,
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/* k2 k3 k4 k5 k6 k7 k8 k9 ho */
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&K2, &K3, &K4, &K5, &K6, &K7, &K8, &K9, &HO,
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/* ic im ip kd ke kh kl kr ks */
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&IC, &IM, &IP, &KD, &KE, &KH, &KL, &KR, &KS,
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/* ku ll ma mb md me mh mk mp */
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&KU, &LL, &MA, &MB, &MD, &ME, &MH, &MK, &MP,
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/* mr nd nl pc rc sc se SF so */
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&MR, &ND, &NL, &_PC, &RC, &SC, &SE, &SF, &SO,
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/* SR ta te ti uc ue up us vb */
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&SR, &TA, &TE, &TI, &UC, &UE, &UP, &US, &VB,
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/* vs ve al dl sf sr AL DL */
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&VS, &VE, &al, &dl, &sf, &sr, &AL_PARM, &DL_PARM,
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/* UP DO LE RI */
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&UP_PARM, &DOWN_PARM, &LEFT_PARM, &RIGHT_PARM,
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};
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static char *aoftspace; /* Address of _tspace for relocation */
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static char tspace[2048]; /* Space for capability strings */
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char *ttytype;
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int
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setterm(type)
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char *type;
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{
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static char genbuf[1024];
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static char __ttytype[1024];
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int unknown;
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struct winsize win;
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char *p;
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#ifdef DEBUG
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__CTRACE("setterm: (\"%s\")\nLINES = %d, COLS = %d\n",
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type, LINES, COLS);
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#endif
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if (type[0] == '\0')
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type = "xx";
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unknown = 0;
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if (tgetent(genbuf, type) != 1) {
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unknown++;
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(void)strncpy(genbuf, "xx|dumb:", sizeof(genbuf) - 1);
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}
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#ifdef DEBUG
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__CTRACE("setterm: tty = %s\n", type);
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#endif
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/* Try TIOCGWINSZ, and, if it fails, the termcap entry. */
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if (ioctl(STDERR_FILENO, TIOCGWINSZ, &win) != -1 &&
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win.ws_row != 0 && win.ws_col != 0) {
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LINES = win.ws_row;
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COLS = win.ws_col;
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} else {
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LINES = tgetnum("li");
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COLS = tgetnum("co");
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}
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/* POSIX 1003.2 requires that the environment override. */
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if ((p = getenv("LINES")) != NULL)
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LINES = (int) strtol(p, NULL, 10);
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if ((p = getenv("COLUMNS")) != NULL)
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COLS = (int) strtol(p, NULL, 10);
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/*
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* Want cols > 4, otherwise things will fail.
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*/
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if (COLS <= 4)
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return (ERR);
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#ifdef DEBUG
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__CTRACE("setterm: LINES = %d, COLS = %d\n", LINES, COLS);
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#endif
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aoftspace = tspace;
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zap(); /* Get terminal description. */
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/* If we can't tab, we can't backtab, either. */
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if (!GT)
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BT = NULL;
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/*
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* Test for cursor motion capbility.
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*
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* XXX
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* This is truly stupid -- historically, tgoto returns "OOPS" if it
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* can't do cursor motions. Some systems have been fixed to return
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* a NULL pointer.
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*/
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if ((p = tgoto(CM, 0, 0)) == NULL || *p == 'O') {
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CA = 0;
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CM = 0;
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} else
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CA = 1;
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PC = _PC ? _PC[0] : 0;
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aoftspace = tspace;
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ttytype = longname(genbuf, __ttytype);
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/* If no scrolling commands, no quick change. */
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__noqch =
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(CS == NULL || HO == NULL ||
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(SF == NULL && sf == NULL) || (SR == NULL && sr == NULL)) &&
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((AL == NULL && al == NULL) || (DL == NULL && dl == NULL));
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return (unknown ? ERR : OK);
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}
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/*
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* zap --
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* Gets all the terminal flags from the termcap database.
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*/
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static void
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zap()
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{
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char *namp, ***sp;
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char **fp;
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char tmp[3];
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#ifdef DEBUG
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char *cp;
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#endif
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tmp[2] = '\0';
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namp = "ambsdaeohcinmimsncnsosulxbxnxtxsxx";
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fp = sflags;
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do {
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*tmp = *namp;
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*(tmp + 1) = *(namp + 1);
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*(*fp++) = tgetflag(tmp);
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#ifdef DEBUG
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__CTRACE("%2.2s = %s\n", namp, *fp[-1] ? "TRUE" : "FALSE");
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#endif
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namp += 2;
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} while (*namp);
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namp = "ALbcblbtcdceclcmcrcsdcDLdmdoedeik0k1k2k3k4k5k6k7k8k9hoicimipkdkekhklkrkskullmambmdmemhmkmpmrndnlpcrcscseSFsoSRtatetiucueupusvbvsvealdlsfsrALDLUPDOLERI";
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sp = sstrs;
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do {
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*tmp = *namp;
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*(tmp + 1) = *(namp + 1);
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*(*sp++) = tgetstr(tmp, &aoftspace);
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#ifdef DEBUG
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__CTRACE("%2.2s = %s", namp, *sp[-1] == NULL ? "NULL\n" : "\"");
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if (*sp[-1] != NULL) {
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for (cp = *sp[-1]; *cp; cp++)
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{
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__CTRACE("%c", unctrl(*cp));
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}
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__CTRACE("\"\n");
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}
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#endif
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namp += 2;
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} while (*namp);
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if (XS)
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SO = SE = NULL;
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else {
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if (tgetnum("sg") > 0)
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SO = NULL;
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if (tgetnum("ug") > 0)
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US = NULL;
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if (!SO && US) {
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SO = US;
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SE = UE;
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}
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}
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}
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/*
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* getcap --
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* Return a capability from termcap.
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*/
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char *
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getcap(name)
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char *name;
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{
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return (tgetstr(name, &aoftspace));
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}
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