1 /* $NetBSD: getdiskrawname.c,v 1.1 2012/04/07 16:44:39 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __RCSID("$NetBSD: getdiskrawname.c,v 1.1 2012/04/07 16:44:39 christos Exp $"); 33 34 #include <sys/stat.h> 35 36 #include <stdio.h> 37 #include <string.h> 38 #include <errno.h> 39 #include <util.h> 40 41 const char * 42 getdiskrawname(char *buf, size_t bufsiz, const char *name) 43 { 44 const char *dp = strrchr(name, '/'); 45 struct stat st; 46 47 if (dp == NULL) { 48 errno = EINVAL; 49 return NULL; 50 } 51 52 if (stat(name, &st) == -1) 53 return NULL; 54 55 if (!S_ISBLK(st.st_mode)) { 56 errno = EFTYPE; 57 return NULL; 58 } 59 60 (void)snprintf(buf, bufsiz, "%.*s/r%s", (int)(dp - name), name, dp + 1); 61 62 return buf; 63 } 64 65 const char * 66 getdiskcookedname(char *buf, size_t bufsiz, const char *name) 67 { 68 const char *dp; 69 struct stat st; 70 71 if ((dp = strrchr(name, '/')) == NULL) { 72 errno = EINVAL; 73 return NULL; 74 } 75 if (stat(name, &st) == -1) 76 return NULL; 77 78 if (!S_ISCHR(st.st_mode)) { 79 errno = EFTYPE; 80 return NULL; 81 } 82 if (dp[1] != 'r') { 83 errno = EINVAL; 84 return NULL; 85 } 86 (void)snprintf(buf, bufsiz, "%.*s/%s", (int)(dp - name), name, dp + 2); 87 88 return buf; 89 } 90