111 lines
2.6 KiB
C
111 lines
2.6 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 <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <linux/ioctl.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/zfs_znode.h>
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#include <sys/fs/zfs.h>
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static int
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ioctl_get_msg(char *var, int fd)
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{
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int error = 0;
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char msg[ZFS_MAX_DATASET_NAME_LEN];
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error = ioctl(fd, BLKZNAME, msg);
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if (error < 0) {
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return (error);
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}
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snprintf(var, ZFS_MAX_DATASET_NAME_LEN, "%s", msg);
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return (error);
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}
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int
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main(int argc, char **argv)
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{
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int fd, error = 0;
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char zvol_name[ZFS_MAX_DATASET_NAME_LEN];
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char *zvol_name_part = NULL;
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char *dev_name;
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struct stat64 statbuf;
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int dev_minor, dev_part;
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int i;
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int rc;
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if (argc < 2) {
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printf("Usage: %s /dev/zvol_device_node\n", argv[0]);
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return (EINVAL);
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}
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dev_name = argv[1];
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error = stat64(dev_name, &statbuf);
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if (error != 0) {
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printf("Unable to access device file: %s\n", dev_name);
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return (errno);
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}
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dev_minor = minor(statbuf.st_rdev);
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dev_part = dev_minor % ZVOL_MINORS;
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fd = open(dev_name, O_RDONLY);
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if (fd < 0) {
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printf("Unable to open device file: %s\n", dev_name);
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return (errno);
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}
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error = ioctl_get_msg(zvol_name, fd);
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if (error < 0) {
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printf("ioctl_get_msg failed:%s\n", strerror(errno));
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return (errno);
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}
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if (dev_part > 0)
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rc = asprintf(&zvol_name_part, "%s-part%d", zvol_name,
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dev_part);
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else
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rc = asprintf(&zvol_name_part, "%s", zvol_name);
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if (rc == -1 || zvol_name_part == NULL)
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goto error;
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for (i = 0; i < strlen(zvol_name_part); i++) {
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if (isblank(zvol_name_part[i]))
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zvol_name_part[i] = '+';
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}
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printf("%s\n", zvol_name_part);
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free(zvol_name_part);
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error:
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close(fd);
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return (error);
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}
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