/* $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 #include #include #include #include #include #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)); }