1/* 2 * Copyright (c) 1997-2006 Erez Zadok 3 * Copyright (c) 1990 Jan-Simon Pendry 4 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Jan-Simon Pendry at Imperial College, London. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgment: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * 40 * File: am-utils/conf/umount/umount_bsd44.c 41 * 42 */ 43 44/* 45 * Unmounting filesystems under BSD 4.4. 46 */ 47 48#ifdef HAVE_CONFIG_H 49# include <config.h> 50#endif /* HAVE_CONFIG_H */ 51#include <am_defs.h> 52#include <amu.h> 53 54 55int 56umount_fs(char *mntdir, const char *mnttabname, u_int unmount_flags) 57{ 58 int error; 59 60eintr: 61 error = unmount(mntdir, 0); 62 if (error < 0) 63 error = errno; 64 65 switch (error) { 66 case EINVAL: 67 case ENOTBLK: 68 case ENOENT: 69 plog(XLOG_WARNING, "unmount: %s is not mounted", mntdir); 70 error = 0; /* Not really an error */ 71 break; 72 73 case EINTR: 74 /* not sure why this happens, but it does. ask kirk one day... */ 75 dlog("%s: unmount: %m", mntdir); 76 goto eintr; 77 78#ifdef MNT2_GEN_OPT_FORCE 79 case EBUSY: 80 case EIO: 81 case ESTALE: 82 /* caller determines if forced unmounts should be used */ 83 if (unmount_flags & AMU_UMOUNT_FORCE) { 84 error = umount2_fs(mntdir, unmount_flags); 85 if (error < 0) 86 error = errno; 87 else 88 return error; 89 } 90 /* fallthrough */ 91#endif /* MNT2_GEN_OPT_FORCE */ 92 93 default: 94 dlog("%s: unmount: %m", mntdir); 95 break; 96 } 97 98 return error; 99} 100 101 102#ifdef MNT2_GEN_OPT_FORCE 103/* force unmount, no questions asked, without touching mnttab file */ 104int 105umount2_fs(const char *mntdir, u_int unmount_flags) 106{ 107 int error = 0; 108 if (unmount_flags & AMU_UMOUNT_FORCE) { 109 plog(XLOG_INFO, "umount2_fs: trying unmount/forced on %s", mntdir); 110 error = unmount(mntdir, MNT2_GEN_OPT_FORCE); 111 if (error < 0 && (errno == EINVAL || errno == ENOENT)) 112 error = 0; /* ignore EINVAL/ENOENT */ 113 if (error < 0) 114 plog(XLOG_WARNING, "%s: unmount/force: %m", mntdir); 115 else 116 dlog("%s: unmount/force: OK", mntdir); 117 } 118 return error; 119} 120#endif /* MNT2_GEN_OPT_FORCE */ 121