termcap.c revision 101752
1/* A portion of this file is from ncurses: */ 2/*************************************************************************** 3* COPYRIGHT NOTICE * 4**************************************************************************** 5* ncurses is copyright (C) 1992-1995 * 6* Zeyd M. Ben-Halim * 7* zmbenhal@netcom.com * 8* Eric S. Raymond * 9* esr@snark.thyrsus.com * 10* * 11* Permission is hereby granted to reproduce and distribute ncurses * 12* by any means and for any fee, whether alone or as part of a * 13* larger distribution, in source or in binary form, PROVIDED * 14* this notice is included with any such distribution, and is not * 15* removed from any of its header files. Mention of ncurses in any * 16* applications linked with it is highly appreciated. * 17* * 18* ncurses comes AS IS with no warranty, implied or expressed. * 19* * 20***************************************************************************/ 21 22#include <curses.priv.h> 23 24#include <string.h> 25#include <term.h> 26#include <tic.h> 27#include <term_entry.h> 28 29/* The rest is from BSD */ 30/* 31 * Copyright (c) 1980, 1993 32 * The Regents of the University of California. All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed by the University of 45 * California, Berkeley and its contributors. 46 * 4. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63#include <sys/cdefs.h> 64__FBSDID("$FreeBSD: head/lib/ncurses/ncurses/termcap.c 101752 2002-08-12 19:13:22Z ru $"); 65 66#ifndef lint 67static const char sccsid[] = "@(#)termcap.c 8.1 (Berkeley) 6/4/93"; 68#endif /* not lint */ 69 70#include <stdio.h> 71#include <ctype.h> 72#include <stdlib.h> 73#include <string.h> 74#include <unistd.h> 75#include <sys/param.h> 76#include "pathnames.h" 77 78#define PBUFSIZ MAXPATHLEN /* max length of filename path */ 79#define PVECSIZ 32 /* max number of names in path */ 80#define TBUFSIZ 1024 /* max length of _nc_tgetent buffer */ 81 82char _nc_termcap[TBUFSIZ + 1]; /* Last getcap, provided to tgetent() emul */ 83 84/* 85 * termcap - routines for dealing with the terminal capability data base 86 * 87 * BUG: Should use a "last" pointer in tbuf, so that searching 88 * for capabilities alphabetically would not be a n**2/2 89 * process when large numbers of capabilities are given. 90 * Note: If we add a last pointer now we will screw up the 91 * tc capability. We really should compile termcap. 92 * 93 * Essentially all the work here is scanning and decoding escapes 94 * in string capabilities. We don't use stdio because the editor 95 * doesn't, and because living w/o it is not hard. 96 */ 97 98/* 99 * Get an entry for terminal name in buffer _nc_termcap from the termcap 100 * file. 101 */ 102int 103_nc_read_termcap_entry(const char *const name, TERMTYPE *const tp) 104{ 105 ENTRY *ep; 106 char *p; 107 char *cp; 108 char *dummy; 109 char **fname; 110 char *home; 111 int i; 112 char pathbuf[PBUFSIZ]; /* holds raw path of filenames */ 113 char *pathvec[PVECSIZ]; /* to point to names in pathbuf */ 114 char **pvec; /* holds usable tail of path vector */ 115 char *termpath; 116 117 _nc_termcap[0] = '\0'; /* in case */ 118 dummy = NULL; 119 fname = pathvec; 120 pvec = pathvec; 121 p = pathbuf; 122 cp = getenv("TERMCAP"); 123 /* 124 * TERMCAP can have one of two things in it. It can be the 125 * name of a file to use instead of /etc/termcap. In this 126 * case it better start with a "/". Or it can be an entry to 127 * use so we don't have to read the file. In this case it 128 * has to already have the newlines crunched out. If TERMCAP 129 * does not hold a file name then a path of names is searched 130 * instead. The path is found in the TERMPATH variable, or 131 * becomes "$HOME/.termcap /etc/termcap" if no TERMPATH exists. 132 */ 133 if (!cp || *cp != '/') { /* no TERMCAP or it holds an entry */ 134 if ( (termpath = getenv("TERMPATH")) ) 135 strncpy(pathbuf, termpath, PBUFSIZ); 136 else { 137 if ( (home = getenv("HOME")) ) {/* set up default */ 138 strncpy(pathbuf, home, PBUFSIZ - 1); /* $HOME first */ 139 pathbuf[PBUFSIZ - 2] = '\0'; /* -2 because we add a slash */ 140 p += strlen(pathbuf); /* path, looking in */ 141 *p++ = '/'; 142 } /* if no $HOME look in current directory */ 143 strncpy(p, _PATH_DEF, PBUFSIZ - (p - pathbuf)); 144 } 145 } 146 else /* user-defined name in TERMCAP */ 147 strncpy(pathbuf, cp, PBUFSIZ); /* still can be tokenized */ 148 149 /* For safety */ 150 if (issetugid()) 151 strcpy(pathbuf, _PATH_DEF_SEC); 152 153 pathbuf[PBUFSIZ - 1] = '\0'; 154 155 *fname++ = pathbuf; /* tokenize path into vector of names */ 156 while (*++p) 157 if (*p == ' ' || *p == ':') { 158 *p = '\0'; 159 while (*++p) 160 if (*p != ' ' && *p != ':') 161 break; 162 if (*p == '\0') 163 break; 164 *fname++ = p; 165 if (fname >= pathvec + PVECSIZ) { 166 fname--; 167 break; 168 } 169 } 170 *fname = (char *) 0; /* mark end of vector */ 171 if (cp && *cp && *cp != '/') 172 if (cgetset(cp) < 0) 173 return(-2); 174 175 i = cgetent(&dummy, pathvec, (char *)name); 176 177 if (i == 0) { 178 char *pd, *ps, *tok, *s, *tcs; 179 size_t len; 180 181 pd = _nc_termcap; 182 ps = dummy; 183 if ((tok = strchr(ps, ':')) == NULL) { 184 len = strlen(ps); 185 if (len >= TBUFSIZ) 186 i = -1; 187 else 188 strcpy(pd, ps); 189 goto done; 190 } 191 len = tok - ps + 1; 192 if (pd + len + 1 - _nc_termcap >= TBUFSIZ) { 193 i = -1; 194 goto done; 195 } 196 memcpy(pd, ps, len); 197 ps += len; 198 pd += len; 199 *pd = '\0'; 200 tcs = pd - 1; 201 for (;;) { 202 while ((tok = strsep(&ps, ":")) != NULL && 203 *(tok - 2) != '\\' && 204 (*tok == '\0' || *tok == '\\' || !isgraph(*tok))) 205 ; 206 if (tok == NULL) 207 break; 208 for (s = tcs; s != NULL && s[1] != '\0'; 209 s = strchr(s, ':')) { 210 s++; 211 if (s[0] == tok[0] && s[1] == tok[1]) 212 goto skip_it; 213 } 214 len = strlen(tok); 215 if (pd + len + 1 - _nc_termcap >= TBUFSIZ) { 216 i = -1; 217 break; 218 } 219 memcpy(pd, tok, len); 220 pd += len; 221 *pd++ = ':'; 222 *pd = '\0'; 223 skip_it: ; 224 } 225 } 226done: 227 if (dummy) 228 free(dummy); 229 230 231/* 232 * From here on is ncurses-specific glue code 233 */ 234 235 if (i < 0) 236 return(ERR); 237 238 _nc_set_source("TERMCAP"); 239 _nc_read_entry_source((FILE *)NULL, _nc_termcap, FALSE, TRUE, NULLHOOK); 240 241 if (_nc_head == (ENTRY *)NULL) 242 return(ERR); 243 244 /* resolve all use references */ 245 _nc_resolve_uses(TRUE); 246 247 for_entry_list(ep) 248 if (_nc_name_match(ep->tterm.term_names, name, "|:")) 249 { 250 /* 251 * Make a local copy of the terminal capabilities. free 252 * all entry storage except the string table for the 253 * loaded type (which we disconnected from the list by 254 * NULLing out ep->tterm.str_table above). 255 */ 256 memcpy(tp, &ep->tterm, sizeof(TERMTYPE)); 257 ep->tterm.str_table = (char *)NULL; 258 _nc_free_entries(_nc_head); 259 _nc_head = _nc_tail = NULL; /* do not reuse! */ 260 261 return 1; /* OK */ 262 } 263 264 _nc_free_entries(_nc_head); 265 _nc_head = _nc_tail = NULL; /* do not reuse! */ 266 return(0); /* not found */ 267} 268