xref: /freebsd-11-stable/usr.bin/tset/wrterm.c

/*-
 * Copyright (c) 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.
 * 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: head/usr.bin/tset/wrterm.c 229403 2012-01-03 18:51:58Z ed $");

#ifndef lint
static const char sccsid[] = "@(#)wrterm.c	8.1 (Berkeley) 6/9/93";
#endif

#include <sys/types.h>

#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <string.h>

#include "extern.h"

/*
 * Output termcap entry to stdout, quoting characters that would give the
 * shell problems and omitting empty fields.
 */
void
wrtermcap(char *bp)
{
	register int ch;
	register char *p;
	char *t, *sep;

	/* Find the end of the terminal names. */
	if ((t = strchr(bp, ':')) == NULL)
		errx(1, "termcap names not colon terminated");
	*t++ = '\0';

	/* Output terminal names that don't have whitespace. */
	sep = strdup("");
	while ((p = strsep(&bp, "|")) != NULL)
		if (*p != '\0' && strpbrk(p, " \t") == NULL) {
			(void)printf("%s%s", sep, p);
			sep = strdup("|");
		}
	(void)putchar(':');

	/*
	 * Output fields, transforming any dangerous characters.  Skip
	 * empty fields or fields containing only whitespace.
	 */
	while ((p = strsep(&t, ":")) != NULL) {
		while ((ch = *p) != '\0' && isspace(ch))
			++p;
		if (ch == '\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(':');
	}
}