OpenBSD-4.6/usr.bin/tset/termcap.c
/* $OpenBSD: termcap.c,v 1.6 2007/03/20 03:56:13 tedu Exp $ */
/* $NetBSD: termcap.c,v 1.7 1995/06/05 19:45:52 pk Exp $ */
/*
* Copyright (c) 1980, 1991, 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.
*/
#ifndef lint
static char rcsid[] = "$OpenBSD: termcap.c,v 1.6 2007/03/20 03:56:13 tedu Exp $";
#endif /* not lint */
#define PVECSIZ 32 /* max number of names in path */
#define _PATH_DEF ".termcap /usr/share/misc/termcap"
#include <sys/param.h>
#include <sys/types.h>
#include <stdio.h>
#include <ctype.h>
#include <err.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/*
* Get an entry for terminal name in buffer bp from the termcap file.
*/
int
tcgetent(bp, name)
char *bp;
const char *name;
{
char *p;
char *cp;
char *dummy;
char **fname;
char *home;
int i;
char pathbuf[MAXPATHLEN]; /* holds raw path of filenames */
char *pathvec[PVECSIZ]; /* to point to names in pathbuf */
char **pvec; /* holds usable tail of path vector */
char *termpath;
fname = pathvec;
pvec = pathvec;
if (!issetugid()) {
cp = getenv("TERMCAP");
/*
* TERMCAP can have one of two things in it. It can be the name
* of a file to use instead of /usr/share/misc/termcap. In this
* case it better start with a "/". Or it can be an entry to
* use so we don't have to read the file. In this case it
* has to already have the newlines crunched out. If TERMCAP
* does not hold a file name then a path of names is searched
* instead. The path is found in the TERMPATH variable, or
* becomes "$HOME/.termcap /usr/share/misc/termcap" if no
* TERMPATH exists.
*/
if (!cp || *cp != '/') { /* no TERMCAP or it holds an entry */
if ((termpath = getenv("TERMPATH")) != NULL)
strlcpy(pathbuf, termpath, sizeof(pathbuf));
else {
if ((home = getenv("HOME")) != NULL &&
*home != '\0' &&
strlen(home) + sizeof(_PATH_DEF) <
sizeof(pathbuf)) {
snprintf(pathbuf, sizeof pathbuf,
"%s/%s", home, _PATH_DEF);
} else {
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, (char *)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)
bp = dummy;
else if (dummy != NULL)
free(dummy);
/* no tc reference loop return code in libterm XXX */
if (i == -3)
return (-1);
return (i + 1);
}
/*
* Output termcap entry to stdout, quoting characters that would give the
* shell problems and omitting empty fields.
*/
void
wrtermcap(bp)
char *bp;
{
int ch;
char *p;
char *t, *sep;
/* Find the end of the terminal names. */
if ((t = strchr(bp, ':')) == NULL)
err(1, "termcap names not colon terminated");
*t++ = '\0';
/* Output terminal names that don't have whitespace. */
sep = "";
while ((p = strsep(&bp, "|")) != NULL)
if (*p != '\0' && strpbrk(p, " \t") == NULL) {
(void)printf("%s%s", sep, p);
sep = "|";
}
(void)putchar(':');
/*
* Output fields, transforming any dangerous characters. Skip
* empty fields or fields containing only whitespace.
*/
while ((p = strsep(&t, ":")) != NULL) {
while (isspace(*p))
++p;
if (*p == '\0')
continue;
while ((ch = *p++) != '\0')
switch(ch) {
case '\033':
(void)printf("\\E");
case ' ': /* No spaces. */
(void)printf("\\040");
break;
case '!': /* No csh history chars. */
(void)printf("\\041");
break;
case ',': /* No csh history chars. */
(void)printf("\\054");
break;
case '"': /* No quotes. */
(void)printf("\\042");
break;
case '\'': /* No quotes. */
(void)printf("\\047");
break;
case '`': /* No quotes. */
(void)printf("\\140");
break;
case '\\': /* Anything following is OK. */
case '^':
(void)putchar(ch);
if ((ch = *p++) == '\0')
break;
/* FALLTHROUGH */
default:
(void)putchar(ch);
}
(void)putchar(':');
}
}