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5a142533f8
zero-alloc, sensibler errors, don't close (or free) before exit. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #13337
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2011, Fajar A. Nugraha. All rights reserved.
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* Use is subject to license terms.
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*/
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/fs/zfs.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#if defined(ZFS_ASAN_ENABLED)
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/*
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* zvol_id is invoked by udev with the help of ptrace()
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* making sanitized binary with leak detection croak
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* because of tracing mechanisms collision
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*/
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extern const char *__asan_default_options(void);
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const char *__asan_default_options(void) {
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return ("abort_on_error=true:halt_on_error=true:"
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"allocator_may_return_null=true:disable_coredump=false:"
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"detect_stack_use_after_return=true:detect_leaks=false");
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}
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#endif
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int
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main(int argc, const char *const *argv)
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{
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if (argc != 2) {
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fprintf(stderr, "usage: %s /dev/zdX\n", argv[0]);
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return (1);
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}
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const char *dev_name = argv[1];
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int fd;
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struct stat sb;
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if ((fd = open(dev_name, O_RDONLY|O_CLOEXEC)) == -1 ||
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fstat(fd, &sb) != 0) {
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fprintf(stderr, "%s: %s\n", dev_name, strerror(errno));
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return (1);
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}
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char zvol_name[MAXNAMELEN + strlen("-part") + 10];
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if (ioctl(fd, BLKZNAME, zvol_name) == -1) {
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fprintf(stderr, "%s: BLKZNAME: %s\n",
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dev_name, strerror(errno));
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return (1);
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}
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unsigned int dev_part = minor(sb.st_rdev) % ZVOL_MINORS;
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if (dev_part != 0)
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sprintf(zvol_name + strlen(zvol_name), "-part%u", dev_part);
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for (size_t i = 0; i < strlen(zvol_name); ++i)
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if (isblank(zvol_name[i]))
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zvol_name[i] = '+';
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puts(zvol_name);
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return (0);
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}
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