1 /* 2 * This file and its contents are supplied under the terms of the 3 * Common Development and Distribution License ("CDDL"), version 1.0. 4 * You may only use this file in accordance with the terms of version 5 * 1.0 of the CDDL. 6 * 7 * A full copy of the text of the CDDL should have accompanied this 8 * source. A copy of the CDDL is also available via the Internet at 9 * http://www.illumos.org/license/CDDL. 10 */ 11 12 /* 13 * Copyright 2019 Joyent, Inc. 14 */ 15 16 #include <sys/types.h> 17 #include <sys/stat.h> 18 #include <fcntl.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <errno.h> 22 #include <string.h> 23 #include <unistd.h> 24 #include <sys/dkio.h> 25 26 int 27 main(int argc, char **argv) 28 { 29 int umap, fd; 30 31 if (argc < 2) { 32 fprintf(stderr, "missing disk name\n"); 33 exit(2); 34 } 35 36 if ((fd = open(argv[1], O_RDONLY)) == -1) { 37 fprintf(stderr, "couldn't open %s: %s\n", argv[1], 38 strerror(errno)); 39 exit(2); 40 } 41 42 if (ioctl(fd, DKIOC_CANFREE, &umap) < 0) { 43 fprintf(stderr, "ioctl failed %s: %s\n", argv[1], 44 strerror(errno)); 45 exit(2); 46 } 47 48 (void) close(fd); 49 50 return (umap ? 0 : 1); 51 } 52