1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 2011, Fajar A. Nugraha. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <ctype.h> 28 #include <errno.h> 29 #include <fcntl.h> 30 #include <stdio.h> 31 #include <string.h> 32 #include <unistd.h> 33 #include <sys/fs/zfs.h> 34 #include <sys/ioctl.h> 35 #include <sys/stat.h> 36 37 #if defined(ZFS_ASAN_ENABLED) 38 /* 39 * zvol_id is invoked by udev with the help of ptrace() 40 * making sanitized binary with leak detection croak 41 * because of tracing mechanisms collision 42 */ 43 extern const char *__asan_default_options(void); 44 45 const char *__asan_default_options(void) { 46 return ("abort_on_error=true:halt_on_error=true:" 47 "allocator_may_return_null=true:disable_coredump=false:" 48 "detect_stack_use_after_return=true:detect_leaks=false"); 49 } 50 #endif 51 52 int 53 main(int argc, const char *const *argv) 54 { 55 if (argc != 2 || strncmp(argv[1], "/dev/zd", 7) != 0) { 56 fprintf(stderr, "usage: %s /dev/zdX\n", argv[0]); 57 return (1); 58 } 59 const char *dev_name = argv[1]; 60 size_t i, len; 61 62 int fd; 63 struct stat sb; 64 if ((fd = open(dev_name, O_RDONLY|O_CLOEXEC)) == -1 || 65 fstat(fd, &sb) != 0) { 66 fprintf(stderr, "%s: %s\n", dev_name, strerror(errno)); 67 return (1); 68 } 69 70 char zvol_name[MAXNAMELEN + strlen("-part") + 10]; 71 if (ioctl(fd, BLKZNAME, zvol_name) == -1) { 72 fprintf(stderr, "%s: BLKZNAME: %s\n", 73 dev_name, strerror(errno)); 74 return (1); 75 } 76 77 const char *dev_part = strrchr(dev_name, 'p'); 78 len = strlen(zvol_name); 79 if (dev_part != NULL) { 80 sprintf(zvol_name + len, "-part%s", dev_part + 1); 81 len = strlen(zvol_name); 82 } 83 84 for (i = 0; i < len; ++i) 85 if (isblank(zvol_name[i])) 86 zvol_name[i] = '+'; 87 88 puts(zvol_name); 89 90 return (0); 91 } 92