1#!/sbin/sh 2# 3# CDDL HEADER START 4# 5# The contents of this file are subject to the terms of the 6# Common Development and Distribution License (the "License"). 7# You may not use this file except in compliance with the License. 8# 9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10# or http://www.opensolaris.org/os/licensing. 11# See the License for the specific language governing permissions 12# and limitations under the License. 13# 14# When distributing Covered Code, include this CDDL HEADER in each 15# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16# If applicable, add the following below this CDDL HEADER, with the 17# fields enclosed by brackets "[]" replaced with your own identifying 18# information: Portions Copyright [yyyy] [name of copyright owner] 19# 20# CDDL HEADER END 21# 22# 23# Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24# Use is subject to license terms. 25# 26# Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T 27# All Rights Reserved 28# 29# 30 31usage () { 32 if [ -n "$1" ]; then 33 echo "umountall: $1" 1>&2 34 fi 35 echo "Usage:\n\tumountall [-k] [-s] [-F FSType] [-l|-r] [-n]" 1>&2 36 echo "\tumountall [-k] [-s] [-h host] [-n]" 1>&2 37 exit 2 38} 39 40MNTTAB=/etc/mnttab 41 42# This script is installed as both /sbin/umountall (as used in some 43# /sbin/rc? and /etc/init.d scripts) _and_ as /usr/sbin/umountall (typically 44# PATHed from the command line). As such it should not depend on /usr 45# being mounted (if /usr is a separate filesystem). 46# 47# /sbin/sh Bourne shell builtins we use: 48# echo 49# exit 50# getopts 51# test, [ ] 52# exec 53# read 54# 55# /sbin commands we use: 56# /sbin/uname 57# /sbin/umount 58# 59# The following /usr based commands may be used by this script (depending on 60# command line options). We will set our PATH to find them, but where they 61# are not present (eg, if /usr is not mounted) we will catch references to 62# them via shell functions conditionally defined after option processing 63# (don't use any of these commands before then). 64# 65# Command Command line option and use 66# /usr/bin/sleep -k, to sleep after an fuser -c -k on the mountpoint 67# /usr/sbin/fuser -k, to kill processes keeping a mount point busy 68# 69# Copyright 2007 Sun Microsystems, Inc. All rights reserved. 70# In addition, we use /usr/bin/tail if it is available; if not we use 71# slower shell constructs to reverse a file. 72 73PATH=/sbin:/usr/sbin:/usr/bin 74 75DEFERRED_ACTIVATION_PATCH_FLAG="/var/run/.patch_loopback_mode" 76SVC_STARTD="/lib/svc/bin/svc.startd" 77 78# Clear these in case they were already set in our inherited environment. 79FSType= 80FFLAG= 81HOST= 82HFLAG= 83RFLAG= 84LFLAG= 85SFLAG= 86KFLAG= 87NFLAG= 88LOCALNAME= 89UMOUNTFLAG= 90 91 92while getopts ?rslkF:h:n c 93do 94 case $c in 95 r) RFLAG="r";; 96 l) LFLAG="l";; 97 s) SFLAG="s";; 98 k) KFLAG="k";; 99 h) if [ -n "$HFLAG" ]; then 100 usage "more than one host specified" 101 fi 102 HOST=$OPTARG 103 HFLAG="h" 104 LOCALNAME=`uname -n` 105 ;; 106 F) if [ -n "$FFLAG" ]; then 107 usage "more than one FStype specified" 108 fi 109 FSType=$OPTARG 110 FFLAG="f" 111 case $FSType in 112 ?????????*) 113 usage "FSType ${FSType} exceeds 8 characters" 114 esac; 115 ;; 116 n) NFLAG="n" 117 # Alias any commands that would perform real actions to 118 # something that tells what action would have been performed 119 UMOUNTFLAG="-V" 120 fuser () { 121 echo "fuser $*" 1>&2 122 } 123 sleep () { 124 : # No need to show where we'd sleep 125 } 126 ;; 127 \?) usage "" 128 ;; 129 esac 130done 131 132# Sanity checking: 133# 1) arguments beyond those supported 134# 2) can't specify both remote and local 135# 3) can't specify a host with -r or -l 136# 4) can't specify a fstype with -h 137# 5) can't specify this host with -h (checks only uname -n) 138# 6) can't be fstype nfs and local 139# 7) only fstype nfs is remote 140 141if [ $# -ge $OPTIND ]; then # 1 142 usage "additional arguments not supported" 143fi 144 145if [ -n "$RFLAG" -a -n "$LFLAG" ]; then # 2 146 usage "options -r and -l are incompatible" 147fi 148 149if [ \( -n "$RFLAG" -o -n "$LFLAG" \) -a "$HFLAG" = "h" ]; then # 3 150 usage "option -${RFLAG}${LFLAG} incompatible with -h option" 151fi 152 153if [ -n "$FFLAG" -a "$HFLAG" = "h" ]; then # 4 154 usage "Specifying FStype incompatible with -h option" 155fi 156 157if [ -n "$HFLAG" -a "$HOST" = "$LOCALNAME" ]; then # 5 158 usage "Specifying local host illegal for -h option" 159fi 160 161if [ "$FSType" = "nfs" -a "$LFLAG" = "l" ]; then # 6 162 usage "option -l and FSType nfs are incompatible" 163fi 164 165if [ -n "$FFLAG" -a "$FSType" != "nfs" -a -n "$RFLAG" ]; then # 7 166 usage "option -r and FSType ${FSType} are incompatible" 167fi 168 169ZONENAME=`zonename` 170 171# Check and if needed sync the boot archive before unmounting everything. 172# 173if [ -z "${RFLAG}${NFLAG}${HFLAG}${FSType}" -a "$ZONENAME" = "global" \ 174 -a -x /sbin/bootadm ] ; then 175 /sbin/bootadm -a update_all 176fi 177 178 179# 180# If we are in deferred activation patching, and the caller is 181# svc.startd, then exit without unmounting any of the remaining 182# file systems since the call path is from shutdown. Note that 183# by the time we get here, smf stop methods for nfs, cachefs 184# etc, will have run. 185# 186if [ -f $DEFERRED_ACTIVATION_PATCH_FLAG ] ; then 187 ppid=`ps -o ppid= -p $$` # parent of umountall will be sh 188 # from system() 189 190 ppid=`ps -o ppid= -p $ppid` # parent of sh will be svc.startd 191 COMM=`ps -o comm= -p $ppid` 192 if [ "$COMM" = "$SVC_STARTD" ] ; then 193 exit 194 fi 195fi 196 197# 198# Take advantage of parallel unmounting at this point if we have no 199# criteria to match and we are in the global zone 200# 201if [ -z "${SFLAG}${LFLAG}${RFLAG}${HFLAG}${KFLAG}${FFLAG}" -a \ 202 "$ZONENAME" = "global" ]; then 203 umount -a ${UMOUNTFLAG} 204 exit # with return code of the umount -a 205fi 206 207# 208# Catch uses of /usr commands when /usr is not mounted 209if [ -n "$KFLAG" -a -z "$NFLAG" ]; then 210 if [ ! -x /usr/sbin/fuser ]; then 211 fuser () { 212 echo "umountall: fuser -k skipped (no /usr)" 1>&2 213 # continue - not fatal 214 } 215 sleep () { 216 : # no point in sleeping if fuser is doing nothing 217 } 218 else 219 if [ ! -x /usr/bin/sleep ]; then 220 sleep () { 221 echo "umountall: sleep after fuser -k skipped (no /usr)" 1>&2 222 # continue - not fatal 223 } 224 fi 225 fi 226fi 227 228# 229# Shell function to avoid using /usr/bin/cut. Given a dev from a 230# fstype=nfs line in mnttab (eg, "host:/export) extract the host 231# component. 232print_host () { 233 OIFS=$IFS 234 IFS=":" 235 set -- $* 236 echo $1 237 IFS=$OIFS 238} 239 240# 241# doumounts echos its return code to stdout, so commands used within 242# this function should take care to produce no other output to stdout. 243doumounts () { 244 ( 245 rc=0 246 fslist="" 247 while read dev mountp fstype mode dummy 248 do 249 case "${mountp}" in 250 / | \ 251 /dev | \ 252 /dev/fd | \ 253 /devices | \ 254 /etc/mnttab | \ 255 /etc/svc/volatile | \ 256 /lib | \ 257 /proc | \ 258 /sbin | \ 259 /system/contract | \ 260 /system/object | \ 261 /tmp | \ 262 /usr | \ 263 /var | \ 264 /var/adm | \ 265 /var/run | \ 266 '' ) 267 # 268 # file systems possibly mounted in the kernel or 269 # in the methods of some of the file system 270 # services 271 # 272 continue 273 ;; 274 * ) 275 if [ -n "$HFLAG" ]; then 276 if [ "$fstype" = "nfs" ]; then 277 thishost=`print_host $dev` 278 if [ "$HOST" != "$thishost" ]; then 279 continue 280 fi 281 else 282 continue 283 fi 284 fi 285 if [ -n "$FFLAG" -a "$FSType" != "$fstype" ]; then 286 continue 287 fi 288 if [ -n "$LFLAG" -a "$fstype" = "nfs" ]; then 289 continue 290 fi 291 if [ -n "$RFLAG" -a "$fstype" != "nfs" ]; then 292 continue 293 fi 294 if [ "$ZONENAME" != "global" ]; then 295 for option in `echo $mode | tr , '\012'`; do 296 # 297 # should not see any zone options 298 # but our own 299 # 300 if [ "$option" = "zone=$ZONENAME" ]; then 301 break 302 fi 303 done 304 if [ "$option" != "zone=$ZONENAME" ]; then 305 continue 306 fi 307 fi 308 if [ -n "${KFLAG}" ]; then 309 fuser -c -k $mountp 1>&2 310 sleep 2 311 fi 312 if [ -n "$SFLAG" ]; then 313 umount ${UMOUNTFLAG} ${mountp} 1>&2 314 trc=$? 315 if [ $trc -ne 0 ]; then 316 rc=$trc 317 fi 318 else 319 # We want to umount in parallel 320 fslist="$fslist $mountp" 321 fi 322 esac 323 done 324 325 if [ -n "$fslist" ]; then 326 umount -a ${UMOUNTFLAG} $fslist 1>&2 327 trc=$? 328 if [ $trc -ne 0 ]; then 329 rc=$trc 330 fi 331 fi 332 333 echo $rc 334 ) 335} 336 337# 338# /etc/mnttab has the most recent mounts last. Reverse it so that we 339# may umount in opposite order to the original mounts. 340# 341 342if [ ! -x /usr/bin/tail ]; then 343 exec < $MNTTAB 344 REVERSED= 345 while read line; do 346 if [ -n "$REVERSED" ]; then 347 REVERSED="$line\n$REVERSED" 348 else 349 REVERSED="$line" 350 fi 351 done 352 353 error=`echo $REVERSED | doumounts` 354else 355 error=`tail -r $MNTTAB | doumounts` 356fi 357 358exit $error 359