1 /* 2 * Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/disk.h> 31 #include <sys/ioctl.h> 32 #include <sys/param.h> 33 #include <sys/mount.h> 34 #include <sys/stat.h> 35 #include <err.h> 36 #include <fcntl.h> 37 #include <unistd.h> 38 39 #include "mkuz_cfg.h" 40 #include "mkuz_insize.h" 41 42 off_t 43 mkuz_get_insize(struct mkuz_cfg *cfp) 44 { 45 int ffd; 46 off_t ms; 47 struct stat sb; 48 struct statfs statfsbuf; 49 50 if (fstat(cfp->fdr, &sb) != 0) { 51 warn("fstat(%s)", cfp->iname); 52 return (-1); 53 } 54 if ((sb.st_flags & SF_SNAPSHOT) != 0) { 55 if (fstatfs(cfp->fdr, &statfsbuf) != 0) { 56 warn("fstatfs(%s)", cfp->iname); 57 return (-1); 58 } 59 ffd = open(statfsbuf.f_mntfromname, O_RDONLY); 60 if (ffd < 0) { 61 warn("open(%s, O_RDONLY)", statfsbuf.f_mntfromname); 62 return (-1); 63 } 64 if (ioctl(ffd, DIOCGMEDIASIZE, &ms) < 0) { 65 warn("ioctl(DIOCGMEDIASIZE)"); 66 close(ffd); 67 return (-1); 68 } 69 close(ffd); 70 sb.st_size = ms; 71 } else if (S_ISCHR(sb.st_mode)) { 72 if (ioctl(cfp->fdr, DIOCGMEDIASIZE, &ms) < 0) { 73 warn("ioctl(DIOCGMEDIASIZE)"); 74 return (-1); 75 } 76 sb.st_size = ms; 77 } else if (!S_ISREG(sb.st_mode)) { 78 warnx("%s: not a character device or regular file\n", 79 cfp->iname); 80 return (-1); 81 } 82 return (sb.st_size); 83 } 84