shadow/libmisc/ttytype.c

/*
 * Copyright 1989 - 1994, Julianne Frances Haugh
 * 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 Julianne F. Haugh 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 JULIE HAUGH 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 JULIE HAUGH 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 <config.h>

#include "rcsid.h"
RCSID ("$Id: ttytype.c,v 1.7 2004/08/18 09:53:58 kloczek Exp $")
#include <stdio.h>
#include "prototypes.h"
#include "defines.h"
#include "getdef.h"

/*
 * ttytype - set ttytype from port to terminal type mapping database
 */

void ttytype (const char *line)
{
	FILE *fp;
	char buf[BUFSIZ];
	char *typefile;
	char *cp;
	char type[BUFSIZ];
	char port[BUFSIZ];

	if (getenv ("TERM"))
		return;
	if ((typefile = getdef_str ("TTYTYPE_FILE")) == NULL)
		return;
	if (access (typefile, F_OK))
		return;

	if (!(fp = fopen (typefile, "r"))) {
		perror (typefile);
		return;
	}
	while (fgets (buf, sizeof buf, fp)) {
		if (buf[0] == '#')
			continue;

		if ((cp = strchr (buf, '\n')))
			*cp = '\0';

#if defined(SUN) || defined(BSD) || defined(SUN4)
		if ((sscanf (buf, "%s \"%*[^\"]\" %s", port, type) == 2 ||
		     sscanf (buf, "%s %*s %s", port, type) == 2) &&
		    strcmp (line, port) == 0)
			break;
#else				/* USG */
		if (sscanf (buf, "%s %s", type, port) == 2 &&
		    strcmp (line, port) == 0)
			break;
#endif
	}
	if (!feof (fp) && !ferror (fp))
		addenv ("TERM", type);

	fclose (fp);
}