getdiskrawname.c revision 1.1.2.3
1 1.1.2.3 yamt /* $NetBSD: getdiskrawname.c,v 1.1.2.3 2014/05/22 11:37:00 yamt Exp $ */ 2 1.1.2.2 yamt 3 1.1.2.2 yamt /*- 4 1.1.2.2 yamt * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 1.1.2.2 yamt * All rights reserved. 6 1.1.2.2 yamt * 7 1.1.2.2 yamt * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 yamt * by Christos Zoulas. 9 1.1.2.2 yamt * 10 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 yamt * modification, are permitted provided that the following conditions 12 1.1.2.2 yamt * are met: 13 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 18 1.1.2.2 yamt * 19 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.2 yamt */ 31 1.1.2.2 yamt #include <sys/cdefs.h> 32 1.1.2.3 yamt __RCSID("$NetBSD: getdiskrawname.c,v 1.1.2.3 2014/05/22 11:37:00 yamt Exp $"); 33 1.1.2.2 yamt 34 1.1.2.2 yamt #include <sys/stat.h> 35 1.1.2.2 yamt 36 1.1.2.2 yamt #include <stdio.h> 37 1.1.2.2 yamt #include <string.h> 38 1.1.2.2 yamt #include <errno.h> 39 1.1.2.2 yamt #include <util.h> 40 1.1.2.3 yamt #include <unistd.h> 41 1.1.2.2 yamt 42 1.1.2.2 yamt const char * 43 1.1.2.2 yamt getdiskrawname(char *buf, size_t bufsiz, const char *name) 44 1.1.2.2 yamt { 45 1.1.2.2 yamt const char *dp = strrchr(name, '/'); 46 1.1.2.2 yamt struct stat st; 47 1.1.2.3 yamt ssize_t len; 48 1.1.2.2 yamt 49 1.1.2.2 yamt if (dp == NULL) { 50 1.1.2.2 yamt errno = EINVAL; 51 1.1.2.2 yamt return NULL; 52 1.1.2.2 yamt } 53 1.1.2.2 yamt 54 1.1.2.3 yamt len = readlink(name, buf, bufsiz-1); 55 1.1.2.3 yamt if (len > 0) { 56 1.1.2.3 yamt buf[len] = '\0'; 57 1.1.2.3 yamt name = buf; 58 1.1.2.3 yamt } 59 1.1.2.3 yamt 60 1.1.2.2 yamt if (stat(name, &st) == -1) 61 1.1.2.2 yamt return NULL; 62 1.1.2.2 yamt 63 1.1.2.2 yamt if (!S_ISBLK(st.st_mode)) { 64 1.1.2.2 yamt errno = EFTYPE; 65 1.1.2.2 yamt return NULL; 66 1.1.2.2 yamt } 67 1.1.2.2 yamt 68 1.1.2.2 yamt (void)snprintf(buf, bufsiz, "%.*s/r%s", (int)(dp - name), name, dp + 1); 69 1.1.2.2 yamt 70 1.1.2.2 yamt return buf; 71 1.1.2.2 yamt } 72 1.1.2.2 yamt 73 1.1.2.2 yamt const char * 74 1.1.2.2 yamt getdiskcookedname(char *buf, size_t bufsiz, const char *name) 75 1.1.2.2 yamt { 76 1.1.2.2 yamt const char *dp; 77 1.1.2.2 yamt struct stat st; 78 1.1.2.3 yamt ssize_t len; 79 1.1.2.2 yamt 80 1.1.2.2 yamt if ((dp = strrchr(name, '/')) == NULL) { 81 1.1.2.2 yamt errno = EINVAL; 82 1.1.2.2 yamt return NULL; 83 1.1.2.2 yamt } 84 1.1.2.3 yamt 85 1.1.2.3 yamt len = readlink(name, buf, bufsiz-1); 86 1.1.2.3 yamt if (len > 0) { 87 1.1.2.3 yamt buf[len] = '\0'; 88 1.1.2.3 yamt name = buf; 89 1.1.2.3 yamt } 90 1.1.2.3 yamt 91 1.1.2.2 yamt if (stat(name, &st) == -1) 92 1.1.2.2 yamt return NULL; 93 1.1.2.2 yamt 94 1.1.2.2 yamt if (!S_ISCHR(st.st_mode)) { 95 1.1.2.2 yamt errno = EFTYPE; 96 1.1.2.2 yamt return NULL; 97 1.1.2.2 yamt } 98 1.1.2.3 yamt 99 1.1.2.2 yamt if (dp[1] != 'r') { 100 1.1.2.2 yamt errno = EINVAL; 101 1.1.2.2 yamt return NULL; 102 1.1.2.2 yamt } 103 1.1.2.3 yamt 104 1.1.2.2 yamt (void)snprintf(buf, bufsiz, "%.*s/%s", (int)(dp - name), name, dp + 2); 105 1.1.2.2 yamt 106 1.1.2.2 yamt return buf; 107 1.1.2.2 yamt } 108
Indexes created Mon Sep 29 18:09:42 GMT 2025