1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/lib/libc/gen/devname.c,v 1.2.2.2 2001/07/31 20:10:19 tmm Exp $ 30 * 31 * @(#)devname.c 8.2 (Berkeley) 4/29/95 32 */ 33 34 #include "namespace.h" 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 #include <sys/param.h> 38 #include <sys/sysctl.h> 39 40 #include <err.h> 41 #include <fcntl.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include "un-namespace.h" 46 47 char * 48 devname_r(dev_t dev, mode_t type, char *buf, size_t len) 49 { 50 size_t n = len; 51 52 if (sysctlbyname("kern.devname", buf, &n, &dev, sizeof(dev)) == 0) 53 return buf; 54 55 /* Just format it if failed to get its name */ 56 snprintf(buf, len, "#%c%d:0x%x", 57 (type & S_IFMT) == S_IFCHR ? 'C' : 'B', 58 major(dev), minor(dev)); 59 60 return (buf); 61 } 62 63 char * 64 devname(dev_t dev, mode_t type) 65 { 66 static char buf[MAXPATHLEN]; 67 68 strlcpy(buf, devname_r(dev, type, buf, sizeof(buf)), sizeof(buf)); 69 70 return (buf); 71 } 72