1 /* $NetBSD: umount_bsd44.c,v 1.1.1.3 2015/01/17 16:34:16 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2014 Erez Zadok 5 * Copyright (c) 1990 Jan-Simon Pendry 6 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 7 * Copyright (c) 1990 The Regents of the University of California. 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * Jan-Simon Pendry at Imperial College, London. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * 38 * File: am-utils/conf/umount/umount_bsd44.c 39 * 40 */ 41 42 /* 43 * Unmounting filesystems under BSD 4.4. 44 */ 45 46 #ifdef HAVE_CONFIG_H 47 # include <config.h> 48 #endif /* HAVE_CONFIG_H */ 49 #include <am_defs.h> 50 #include <amu.h> 51 52 53 int 54 umount_fs(char *mntdir, const char *mnttabname, u_int unmount_flags) 55 { 56 int error; 57 58 eintr: 59 error = unmount(mntdir, 0); 60 if (error < 0) 61 error = errno; 62 63 switch (error) { 64 case EINVAL: 65 case ENOTBLK: 66 case ENOENT: 67 plog(XLOG_WARNING, "unmount: %s is not mounted", mntdir); 68 error = 0; /* Not really an error */ 69 break; 70 71 case EINTR: 72 /* not sure why this happens, but it does. ask kirk one day... */ 73 dlog("%s: unmount: %m", mntdir); 74 goto eintr; 75 76 #ifdef MNT2_GEN_OPT_FORCE 77 case EBUSY: 78 case EIO: 79 case ESTALE: 80 /* caller determines if forced unmounts should be used */ 81 if (unmount_flags & AMU_UMOUNT_FORCE) { 82 error = umount2_fs(mntdir, unmount_flags); 83 if (error < 0) 84 error = errno; 85 else 86 return error; 87 } 88 /* fallthrough */ 89 #endif /* MNT2_GEN_OPT_FORCE */ 90 91 default: 92 dlog("%s: unmount: %m", mntdir); 93 break; 94 } 95 96 return error; 97 } 98 99 100 #ifdef MNT2_GEN_OPT_FORCE 101 /* force unmount, no questions asked, without touching mnttab file */ 102 int 103 umount2_fs(const char *mntdir, u_int unmount_flags) 104 { 105 int error = 0; 106 107 if (unmount_flags & AMU_UMOUNT_FORCE) { 108 plog(XLOG_INFO, "umount2_fs: trying unmount/forced on %s", mntdir); 109 error = unmount(mntdir, MNT2_GEN_OPT_FORCE); 110 if (error < 0 && (errno == EINVAL || errno == ENOENT)) 111 error = 0; /* ignore EINVAL/ENOENT */ 112 if (error < 0) 113 plog(XLOG_WARNING, "%s: unmount/force: %m", mntdir); 114 else 115 dlog("%s: unmount/force: OK", mntdir); 116 } 117 return error; 118 } 119 #endif /* MNT2_GEN_OPT_FORCE */ 120