OpenBSD-4.6/lib/libocurses/termcap.c
/* $OpenBSD: termcap.c,v 1.9 2005/08/14 17:15:19 espie Exp $ */
/* $NetBSD: termcap.c,v 1.7 1995/06/05 19:45:52 pk Exp $ */
/*
* 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. 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.
*/
#define PBUFSIZ 512 /* max length of filename path */
#define PVECSIZ 32 /* max number of names in path */
#include <sys/param.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <curses.h>
#include "pathnames.h"
/*
* 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.
*/
static char *tbuf; /* termcap buffer */
/*
* Get an entry for terminal name in buffer bp from the termcap file.
*/
int
tgetent(bp, name)
char *bp, *name;
{
register char *p;
register char *cp;
char *dummy;
char **fname;
char *home;
int i;
char pathbuf[MAXPATHLEN]; /* holds raw path of filenames */
char *pathvec[PVECSIZ]; /* to point to names in pathbuf */
char **pvec; /* holds usable tail of path vector */
char *termpath;
fname = pathvec;
pvec = pathvec;
tbuf = bp;
cp = issetugid() ? NULL : getenv("TERMCAP");
/*
* TERMCAP can have one of two things in it. It can be the name
* of a file to use instead of /usr/share/misc/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 /usr/share/misc/termcap" if no TERMPATH exists.
*/
if (cp == NULL) {
strlcpy(pathbuf, _PATH_TERMCAP, sizeof(pathbuf));
} else if (!cp || *cp != '/') { /* TERMCAP holds an entry */
if ((termpath = getenv("TERMPATH")) != NULL)
strlcpy(pathbuf, termpath, sizeof(pathbuf));
else if ((home = getenv("HOME")) == NULL || *home == '\0' ||
snprintf(pathbuf, sizeof(pathbuf), "%s/%s", home,
_PATH_DEF) >= sizeof(pathbuf))
strlcpy(pathbuf, _PATH_DEF, sizeof(pathbuf));
} else { /* user-defined path in TERMCAP */
/* still can be tokenized */
strlcpy(pathbuf, cp, sizeof(pathbuf));
}
*fname++ = pathbuf; /* tokenize path into vector of names */
/* split pathbuf into a vector of paths */
p = pathbuf;
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);
dummy = NULL;
i = cgetent(&dummy, pathvec, name);
if (i == 0 && bp != NULL) {
strlcpy(bp, dummy, 1024);
if ((cp = strrchr(bp, ':')) != NULL)
if (cp[1] != '\0')
cp[1] = '\0';
}
else if (i == 0 && bp == NULL)
tbuf = dummy;
else if (dummy != NULL)
free(dummy);
/* no tc reference loop return code in libterm XXX */
if (i == -3)
return (-1);
return (i + 1);
}
/*
* Return the (numeric) option id.
* Numeric options look like
* li#80
* i.e. the option string is separated from the numeric value by
* a # character. If the option is not found we return -1.
* Note that we handle octal numbers beginning with 0.
*/
int
tgetnum(id)
char *id;
{
long num;
if (cgetnum(tbuf, id, &num) == 0)
return (num);
else
return (-1);
}
/*
* Handle a flag option.
* Flag options are given "naked", i.e. followed by a : or the end
* of the buffer. Return 1 if we find the option, or 0 if it is
* not given.
*/
int
tgetflag(id)
char *id;
{
return (cgetcap(tbuf, id, ':') != NULL);
}
/*
* Get a string valued option.
* These are given as
* cl=^Z
* Much decoding is done on the strings, and the strings are
* placed in area, which is a ref parameter which is updated.
* No checking on area overflow.
*/
char *
tgetstr(id, area)
char *id, **area;
{
char ids[3];
char *s;
int i;
/*
* XXX
* This is for all the boneheaded programs that relied on tgetstr
* to look only at the first 2 characters of the string passed...
*/
*ids = *id;
ids[1] = id[1];
ids[2] = '\0';
if ((i = cgetstr(tbuf, ids, &s)) < 0)
return NULL;
strlcpy(*area, s, 1024);
*area += i + 1;
return (s);
}