lintodev.c

操作系统SunOS 4.1.3版本的源码

/*	Copyright (c) 1984 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

#ident	"@(#)lintodev.c 1.1 92/07/30 SMI" /* from S5R3 acct:lib/lintodev.c 1.3 */
/*
 *	convert linename to device
 *	return -1 if nonexistent or not character device
 */

#include "acctdef.h"
#include <sys/types.h>
#include <sys/stat.h>
static	char	devtty[5+LSZ+1]	= "/dev/xxxxxxxx";

dev_t
lintodev(linename)
char linename[LSZ];
{
	struct stat sb;
	strncpy(&devtty[5], linename, LSZ);
	if (stat(devtty, &sb) != -1 && (sb.st_mode&S_IFMT) == S_IFCHR)
		return((dev_t)sb.st_rdev);
	return((dev_t)-1);
}