FreeBSD-5.3/lib/libncurses/termcap.c
/* A portion of this file is from ncurses: */
/***************************************************************************
* COPYRIGHT NOTICE *
****************************************************************************
* ncurses is copyright (C) 1992-1995 *
* Zeyd M. Ben-Halim *
* zmbenhal@netcom.com *
* Eric S. Raymond *
* esr@snark.thyrsus.com *
* *
* Permission is hereby granted to reproduce and distribute ncurses *
* by any means and for any fee, whether alone or as part of a *
* larger distribution, in source or in binary form, PROVIDED *
* this notice is included with any such distribution, and is not *
* removed from any of its header files. Mention of ncurses in any *
* applications linked with it is highly appreciated. *
* *
* ncurses comes AS IS with no warranty, implied or expressed. *
* *
***************************************************************************/
#include <curses.priv.h>
#include <string.h>
#include <term.h>
#include <tic.h>
#include <term_entry.h>
/* The rest is from BSD */
/*
* Copyright (c) 1980, 1993
* 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. 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libncurses/termcap.c,v 1.6 2002/08/12 19:13:22 ru Exp $");
#ifndef lint
static const char sccsid[] = "@(#)termcap.c 8.1 (Berkeley) 6/4/93";
#endif /* not lint */
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include "pathnames.h"
#define PBUFSIZ MAXPATHLEN /* max length of filename path */
#define PVECSIZ 32 /* max number of names in path */
#define TBUFSIZ 1024 /* max length of _nc_tgetent buffer */
char _nc_termcap[TBUFSIZ + 1]; /* Last getcap, provided to tgetent() emul */
/*
* termcap - routines for dealing with the terminal capability data base
*
* BUG: Should use a "last" pointer in tbuf, so that searching
* for capabilities alphabetically would not be a n**2/2
* process when large numbers of capabilities are given.
* Note: If we add a last pointer now we will screw up the
* tc capability. We really should compile termcap.
*
* Essentially all the work here is scanning and decoding escapes
* in string capabilities. We don't use stdio because the editor
* doesn't, and because living w/o it is not hard.
*/
/*
* Get an entry for terminal name in buffer _nc_termcap from the termcap
* file.
*/
int
_nc_read_termcap_entry(const char *const name, TERMTYPE *const tp)
{
ENTRY *ep;
char *p;
char *cp;
char *dummy;
char **fname;
char *home;
int i;
char pathbuf[PBUFSIZ]; /* holds raw path of filenames */
char *pathvec[PVECSIZ]; /* to point to names in pathbuf */
char **pvec; /* holds usable tail of path vector */
char *termpath;
_nc_termcap[0] = '\0'; /* in case */
dummy = NULL;
fname = pathvec;
pvec = pathvec;
p = pathbuf;
cp = getenv("TERMCAP");
/*
* TERMCAP can have one of two things in it. It can be the
* name of a file to use instead of /etc/termcap. In this
* case it better start with a "/". Or it can be an entry to
* use so we don't have to read the file. In this case it
* has to already have the newlines crunched out. If TERMCAP
* does not hold a file name then a path of names is searched
* instead. The path is found in the TERMPATH variable, or
* becomes "$HOME/.termcap /etc/termcap" if no TERMPATH exists.
*/
if (!cp || *cp != '/') { /* no TERMCAP or it holds an entry */
if ( (termpath = getenv("TERMPATH")) )
strncpy(pathbuf, termpath, PBUFSIZ);
else {
if ( (home = getenv("HOME")) ) {/* set up default */
strncpy(pathbuf, home, PBUFSIZ - 1); /* $HOME first */
pathbuf[PBUFSIZ - 2] = '\0'; /* -2 because we add a slash */
p += strlen(pathbuf); /* path, looking in */
*p++ = '/';
} /* if no $HOME look in current directory */
strncpy(p, _PATH_DEF, PBUFSIZ - (p - pathbuf));
}
}
else /* user-defined name in TERMCAP */
strncpy(pathbuf, cp, PBUFSIZ); /* still can be tokenized */
/* For safety */
if (issetugid())
strcpy(pathbuf, _PATH_DEF_SEC);
pathbuf[PBUFSIZ - 1] = '\0';
*fname++ = pathbuf; /* tokenize path into vector of names */
while (*++p)
if (*p == ' ' || *p == ':') {
*p = '\0';
while (*++p)
if (*p != ' ' && *p != ':')
break;
if (*p == '\0')
break;
*fname++ = p;
if (fname >= pathvec + PVECSIZ) {
fname--;
break;
}
}
*fname = (char *) 0; /* mark end of vector */
if (cp && *cp && *cp != '/')
if (cgetset(cp) < 0)
return(-2);
i = cgetent(&dummy, pathvec, (char *)name);
if (i == 0) {
char *pd, *ps, *tok, *s, *tcs;
size_t len;
pd = _nc_termcap;
ps = dummy;
if ((tok = strchr(ps, ':')) == NULL) {
len = strlen(ps);
if (len >= TBUFSIZ)
i = -1;
else
strcpy(pd, ps);
goto done;
}
len = tok - ps + 1;
if (pd + len + 1 - _nc_termcap >= TBUFSIZ) {
i = -1;
goto done;
}
memcpy(pd, ps, len);
ps += len;
pd += len;
*pd = '\0';
tcs = pd - 1;
for (;;) {
while ((tok = strsep(&ps, ":")) != NULL &&
*(tok - 2) != '\\' &&
(*tok == '\0' || *tok == '\\' || !isgraph(*tok)))
;
if (tok == NULL)
break;
for (s = tcs; s != NULL && s[1] != '\0';
s = strchr(s, ':')) {
s++;
if (s[0] == tok[0] && s[1] == tok[1])
goto skip_it;
}
len = strlen(tok);
if (pd + len + 1 - _nc_termcap >= TBUFSIZ) {
i = -1;
break;
}
memcpy(pd, tok, len);
pd += len;
*pd++ = ':';
*pd = '\0';
skip_it: ;
}
}
done:
if (dummy)
free(dummy);
/*
* From here on is ncurses-specific glue code
*/
if (i < 0)
return(ERR);
_nc_set_source("TERMCAP");
_nc_read_entry_source((FILE *)NULL, _nc_termcap, FALSE, TRUE, NULLHOOK);
if (_nc_head == (ENTRY *)NULL)
return(ERR);
/* resolve all use references */
_nc_resolve_uses(TRUE);
for_entry_list(ep)
if (_nc_name_match(ep->tterm.term_names, name, "|:"))
{
/*
* Make a local copy of the terminal capabilities. free
* all entry storage except the string table for the
* loaded type (which we disconnected from the list by
* NULLing out ep->tterm.str_table above).
*/
memcpy(tp, &ep->tterm, sizeof(TERMTYPE));
ep->tterm.str_table = (char *)NULL;
_nc_free_entries(_nc_head);
_nc_head = _nc_tail = NULL; /* do not reuse! */
return 1; /* OK */
}
_nc_free_entries(_nc_head);
_nc_head = _nc_tail = NULL; /* do not reuse! */
return(0); /* not found */
}