1 /* $NetBSD: umount_bsd44.c,v 1.1.1.2 2009/03/20 20:26:52 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2009 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. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgment: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * 42 * File: am-utils/conf/umount/umount_bsd44.c 43 * 44 */ 45 46 /* 47 * Unmounting filesystems under BSD 4.4. 48 */ 49 50 #ifdef HAVE_CONFIG_H 51 # include <config.h> 52 #endif /* HAVE_CONFIG_H */ 53 #include <am_defs.h> 54 #include <amu.h> 55 56 57 int 58 umount_fs(char *mntdir, const char *mnttabname, u_int unmount_flags) 59 { 60 int error; 61 62 eintr: 63 error = unmount(mntdir, 0); 64 if (error < 0) 65 error = errno; 66 67 switch (error) { 68 case EINVAL: 69 case ENOTBLK: 70 case ENOENT: 71 plog(XLOG_WARNING, "unmount: %s is not mounted", mntdir); 72 error = 0; /* Not really an error */ 73 break; 74 75 case EINTR: 76 /* not sure why this happens, but it does. ask kirk one day... */ 77 dlog("%s: unmount: %m", mntdir); 78 goto eintr; 79 80 #ifdef MNT2_GEN_OPT_FORCE 81 case EBUSY: 82 case EIO: 83 case ESTALE: 84 /* caller determines if forced unmounts should be used */ 85 if (unmount_flags & AMU_UMOUNT_FORCE) { 86 error = umount2_fs(mntdir, unmount_flags); 87 if (error < 0) 88 error = errno; 89 else 90 return error; 91 } 92 /* fallthrough */ 93 #endif /* MNT2_GEN_OPT_FORCE */ 94 95 default: 96 dlog("%s: unmount: %m", mntdir); 97 break; 98 } 99 100 return error; 101 } 102 103 104 #ifdef MNT2_GEN_OPT_FORCE 105 /* force unmount, no questions asked, without touching mnttab file */ 106 int 107 umount2_fs(const char *mntdir, u_int unmount_flags) 108 { 109 int error = 0; 110 111 if (unmount_flags & AMU_UMOUNT_FORCE) { 112 plog(XLOG_INFO, "umount2_fs: trying unmount/forced on %s", mntdir); 113 error = unmount(mntdir, MNT2_GEN_OPT_FORCE); 114 if (error < 0 && (errno == EINVAL || errno == ENOENT)) 115 error = 0; /* ignore EINVAL/ENOENT */ 116 if (error < 0) 117 plog(XLOG_WARNING, "%s: unmount/force: %m", mntdir); 118 else 119 dlog("%s: unmount/force: OK", mntdir); 120 } 121 return error; 122 } 123 #endif /* MNT2_GEN_OPT_FORCE */ 124