home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1981 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. 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.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)setterm.c 5.9 (Berkeley) 8/23/92";
- #endif /* not lint */
-
- #include <sys/ioctl.h>
-
- #include <curses.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
-
- static void zap __P((void));
-
- static char *sflags[] = {
- &AM, &BS, &DA, &EO, &HC, &HZ, &IN, &MI, &MS,
- &NC, &NS, &OS, &UL, &XB, &XN, &XT, &XS, &XX
- };
-
- static char *_PC,
- **sstrs[] = {
- &AL, &BC, &BT, &CD, &CE, &CL, &CM, &CR, &CS,
- &DC, &DL, &DM, &DO, &ED, &EI, &K0, &K1, &K2,
- &K3, &K4, &K5, &K6, &K7, &K8, &K9, &HO, &IC,
- &IM, &IP, &KD, &KE, &KH, &KL, &KR, &KS, &KU,
- &LL, &MA, &ND, &NL, &_PC, &RC, &SC, &SE, &SF,
- &SO, &SR, &TA, &TE, &TI, &UC, &UE, &UP, &US,
- &VB, &VS, &VE, &AL_PARM, &DL_PARM, &UP_PARM,
- &DOWN_PARM, &LEFT_PARM, &RIGHT_PARM,
- };
-
- static char *aoftspace; /* Address of _tspace for relocation */
- static char tspace[2048]; /* Space for capability strings */
-
- static int destcol, destline;
-
- 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
- __TRACE("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++;
- strcpy(genbuf, "xx|dumb:");
- }
- #ifdef DEBUG
- __TRACE("setterm: tty = %s\n", type);
- #endif
-
- /* Try TIOCGWINSZ, 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("ROWS")) != NULL)
- LINES = strtol(p, NULL, 10);
- if ((p = getenv("COLUMNS")) != NULL)
- COLS = strtol(p, NULL, 10);
-
- /*
- * XXX
- * Historically, curses fails if rows <= 5, cols <= 4.
- */
- if (LINES <= 5 || COLS <= 4)
- return (ERR);
-
- #ifdef DEBUG
- __TRACE("setterm: LINES = %d, COLS = %d\n", LINES, COLS);
- #endif
- aoftspace = tspace;
- zap(); /* Get terminal description. */
-
- /* Handle funny termcap capabilities. */
- if (CS && SC && RC)
- AL = DL = "";
- if (AL_PARM && AL == NULL)
- AL = "";
- if (DL_PARM && DL == NULL)
- DL = "";
- if (IC) {
- if (IM == NULL)
- IM = "";
- if (EI == NULL)
- EI = "";
- }
- if (!GT) /* If we can't tab, we can't backtab either. */
- BT = NULL;
-
- if (tgoto(CM, destcol, destline)[0] == 'O') {
- CA = 0;
- CM = 0;
- } else
- CA = 1;
-
- PC = _PC ? _PC[0] : 0;
- aoftspace = tspace;
- ttytype = longname(genbuf, __ttytype);
-
- return (unknown ? ERR : OK);
- }
-
- /*
- * zap --
- * Gets all the terminal flags from the termcap database.
- */
- static void
- zap()
- {
- register char *namp, ***sp;
- register char **fp;
- #ifdef DEBUG
- register char *cp;
- #endif
-
- namp = "ambsdadbeohchzinmimsncnsosulxbxnxtxsxx";
- fp = sflags;
- do {
- *(*fp++) = tgetflag(namp);
- #ifdef DEBUG
- __TRACE("2.2s = %s\n", namp, *fp[-1] ? "TRUE" : "FALSE");
- #endif
- namp += 2;
- } while (*namp);
- namp = "albcbtcdceclcmcrcsdcdldmdoedeik0k1k2k3k4k5k6k7k8k9hoicimipkdkekhklkrkskullmandnlpcrcscsesfsosrtatetiucueupusvbvsveALDLUPDOLERI";
- sp = sstrs;
- do {
- *(*sp++) = tgetstr(namp, &aoftspace);
- #ifdef DEBUG
- __TRACE("2.2s = %s", namp, *sp[-1] == NULL ? "NULL\n" : "\"");
- if (*sp[-1] != NULL) {
- for (cp = *sp[-1]; *cp; cp++)
- __TRACE("%s", unctrl(*cp));
- __TRACE("\"\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));
- }
-