devname.c revision 116610
11573Srgrimes/* 21573Srgrimes * Copyright (c) 1989, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * Redistribution and use in source and binary forms, with or without 61573Srgrimes * modification, are permitted provided that the following conditions 71573Srgrimes * are met: 81573Srgrimes * 1. Redistributions of source code must retain the above copyright 91573Srgrimes * notice, this list of conditions and the following disclaimer. 101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111573Srgrimes * notice, this list of conditions and the following disclaimer in the 121573Srgrimes * documentation and/or other materials provided with the distribution. 131573Srgrimes * 3. All advertising materials mentioning features or use of this software 141573Srgrimes * must display the following acknowledgement: 151573Srgrimes * This product includes software developed by the University of 161573Srgrimes * California, Berkeley and its contributors. 171573Srgrimes * 4. Neither the name of the University nor the names of its contributors 181573Srgrimes * may be used to endorse or promote products derived from this software 191573Srgrimes * without specific prior written permission. 201573Srgrimes * 211573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311573Srgrimes * SUCH DAMAGE. 321573Srgrimes */ 331573Srgrimes 341573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 3523658Speterstatic char sccsid[] = "@(#)devname.c 8.2 (Berkeley) 4/29/95"; 361573Srgrimes#endif /* LIBC_SCCS and not lint */ 3790039Sobrien#include <sys/cdefs.h> 3890039Sobrien__FBSDID("$FreeBSD: head/lib/libc/gen/devname.c 116610 2003-06-20 09:52:27Z phk $"); 391573Srgrimes 401573Srgrimes#include <sys/types.h> 4165632Sphk#include <sys/sysctl.h> 421573Srgrimes 431573Srgrimes#include <err.h> 441573Srgrimes#include <fcntl.h> 451573Srgrimes#include <stdio.h> 461573Srgrimes#include <string.h> 4765955Sphk#include <sys/param.h> 4848882Sphk#include <sys/stat.h> 491573Srgrimes 5048882Sphkchar * 51116610Sphkdevname_r(dev_t dev, mode_t type, char *buf, int len) 5248882Sphk{ 5380552Stmm int i; 5480552Stmm size_t j; 5548882Sphk char *r; 5648882Sphk 5765632Sphk if ((type & S_IFMT) == S_IFCHR) { 58116610Sphk j = len; 5965632Sphk i = sysctlbyname("kern.devname", buf, &j, &dev, sizeof (dev)); 6065632Sphk if (i == 0) 6165632Sphk return (buf); 6248882Sphk } 6365632Sphk 6465632Sphk /* Finally just format it */ 65115881Sphk if (dev == NODEV) 66115881Sphk r = "#NODEV"; 67115881Sphk else 6865955Sphk r = "#%c:%d:0x%x"; 69116610Sphk snprintf(buf, len, r, 7065955Sphk (type & S_IFMT) == S_IFCHR ? 'C' : 'B', major(dev), minor(dev)); 7165955Sphk return (buf); 7248882Sphk} 73116610Sphk 74116610Sphkchar * 75116610Sphkdevname(dev_t dev, mode_t type) 76116610Sphk{ 77116610Sphk static char buf[SPECNAMELEN + 1]; 78116610Sphk 79116610Sphk return(devname_r(dev, type, buf, sizeof(buf))); 80116610Sphk} 81