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 2009 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] [-Z] [-n]" 1>&2 36 echo "\tumountall [-k] [-s] [-h host] [-Z] [-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# In addition, we use /usr/bin/tail if it is available; if not we use 70# slower shell constructs to reverse a file. 71 72PATH=/sbin:/usr/sbin:/usr/bin 73 74DEFERRED_ACTIVATION_PATCH_FLAG="/var/run/.patch_loopback_mode" 75SVC_STARTD="/lib/svc/bin/svc.startd" 76 77# Clear these in case they were already set in our inherited environment. 78FSType= 79FFLAG= 80HOST= 81HFLAG= 82RFLAG= 83LFLAG= 84SFLAG= 85KFLAG= 86ZFLAG= 87NFLAG= 88LOCALNAME= 89UMOUNTFLAG= 90 91 92while getopts ?rslkF:h:Zn 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 Z) ZFLAG="z";; 117 n) NFLAG="n" 118 # Alias any commands that would perform real actions to 119 # something that tells what action would have been performed 120 UMOUNTFLAG="-V" 121 fuser () { 122 echo "fuser $*" 1>&2 123 } 124 sleep () { 125 : # No need to show where we'd sleep 126 } 127 ;; 128 \?) usage "" 129 ;; 130 esac 131done 132 133# Sanity checking: 134# 1) arguments beyond those supported 135# 2) can't specify both remote and local 136# 3) can't specify a host with -r or -l 137# 4) can't specify a fstype with -h 138# 5) can't specify this host with -h (checks only uname -n) 139# 6) can't be fstype nfs and local 140# 7) only fstype nfs is remote 141 142if [ $# -ge $OPTIND ]; then # 1 143 usage "additional arguments not supported" 144fi 145 146if [ -n "$RFLAG" -a -n "$LFLAG" ]; then # 2 147 usage "options -r and -l are incompatible" 148fi 149 150if [ \( -n "$RFLAG" -o -n "$LFLAG" \) -a "$HFLAG" = "h" ]; then # 3 151 usage "option -${RFLAG}${LFLAG} incompatible with -h option" 152fi 153 154if [ -n "$FFLAG" -a "$HFLAG" = "h" ]; then # 4 155 usage "Specifying FStype incompatible with -h option" 156fi 157 158if [ -n "$HFLAG" -a "$HOST" = "$LOCALNAME" ]; then # 5 159 usage "Specifying local host illegal for -h option" 160fi 161 162if [ "$FSType" = "nfs" -a "$LFLAG" = "l" ]; then # 6 163 usage "option -l and FSType nfs are incompatible" 164fi 165 166if [ -n "$FFLAG" -a "$FSType" != "nfs" -a -n "$RFLAG" ]; then # 7 167 usage "option -r and FSType ${FSType} are incompatible" 168fi 169 170ZONENAME=`zonename` 171 172# 173# If we are in deferred activation patching, and the caller is 174# svc.startd, then exit without unmounting any of the remaining 175# file systems since the call path is from shutdown. Note that 176# by the time we get here, smf stop methods for nfs, cachefs 177# etc, will have run. 178# 179if [ -f $DEFERRED_ACTIVATION_PATCH_FLAG ] ; then 180 ppid=`ps -o ppid= -p $$` # parent of umountall will be sh 181 # from system() 182 183 ppid=`ps -o ppid= -p $ppid` # parent of sh will be svc.startd 184 COMM=`ps -o comm= -p $ppid` 185 if [ "$COMM" = "$SVC_STARTD" ] ; then 186 exit 187 fi 188fi 189 190# 191# Take advantage of parallel unmounting at this point if we have no 192# criteria to match and we are in the global zone 193# 194if [ -z "${SFLAG}${LFLAG}${RFLAG}${HFLAG}${KFLAG}${FFLAG}${ZFLAG}" -a \ 195 "$ZONENAME" = "global" ]; then 196 umount -a ${UMOUNTFLAG} 197 exit # with return code of the umount -a 198fi 199 200# 201# Catch uses of /usr commands when /usr is not mounted 202if [ -n "$KFLAG" -a -z "$NFLAG" ]; then 203 if [ ! -x /usr/sbin/fuser ]; then 204 fuser () { 205 echo "umountall: fuser -k skipped (no /usr)" 1>&2 206 # continue - not fatal 207 } 208 sleep () { 209 : # no point in sleeping if fuser is doing nothing 210 } 211 else 212 if [ ! -x /usr/bin/sleep ]; then 213 sleep () { 214 echo "umountall: sleep after fuser -k skipped (no /usr)" 1>&2 215 # continue - not fatal 216 } 217 fi 218 fi 219fi 220 221# 222# Shell function to avoid using /usr/bin/cut. Given a dev from a 223# fstype=nfs line in mnttab (eg, "host:/export) extract the host 224# component. 225print_host () { 226 OIFS=$IFS 227 IFS=":" 228 set -- $* 229 echo $1 230 IFS=$OIFS 231} 232 233# 234# doumounts echos its return code to stdout, so commands used within 235# this function should take care to produce no other output to stdout. 236doumounts () { 237 ( 238 rc=0 239 fslist="" 240 nfslist="" 241 while read dev mountp fstype mode dummy 242 do 243 case "${mountp}" in 244 / | \ 245 /dev | \ 246 /dev/fd | \ 247 /devices | \ 248 /etc/mnttab | \ 249 /etc/svc/volatile | \ 250 /lib | \ 251 /proc | \ 252 /sbin | \ 253 /system/contract | \ 254 /system/object | \ 255 /tmp | \ 256 /tmp/.libgrubmgmt* | \ 257 /usr | \ 258 /var | \ 259 /var/adm | \ 260 /var/run | \ 261 '' ) 262 # 263 # file systems possibly mounted in the kernel or 264 # in the methods of some of the file system 265 # services 266 # 267 continue 268 ;; 269 * ) 270 if [ -n "$HFLAG" ]; then 271 if [ "$fstype" = "nfs" ]; then 272 thishost=`print_host $dev` 273 if [ "$HOST" != "$thishost" ]; then 274 continue 275 fi 276 else 277 continue 278 fi 279 fi 280 if [ -n "$FFLAG" -a "$FSType" != "$fstype" ]; then 281 continue 282 fi 283 if [ -n "$LFLAG" -a "$fstype" = "nfs" ]; then 284 nfslist="$nfslist $mountp" 285 continue 286 fi 287 # 288 # This will filter out autofs mounts with nfs file 289 # system mounted on the top of it. 290 # 291 # WARNING: use of any syscall on a NFS file system has 292 # the danger to go over-the-wire and could cause nfs 293 # clients to hang on shutdown, if the nfs server is 294 # down beforehand. 295 # For the reason described above, a simple test like 296 # "df -F nfs $mountp" can't be used to filter out 297 # nfs-over-autofs mounts. We loop over a list instead: 298 # 299 if [ -n "$LFLAG" -a -n "$nfslist" -a "$fstype" = "autofs" ] 300 then 301 for m in $nfslist; do 302 if [ "$mountp" = "$m" ]; then 303 # Resume the outer while loop 304 continue 2 305 fi 306 done 307 fi 308 if [ -n "$RFLAG" -a "$fstype" != "nfs" ]; then 309 continue 310 fi 311 if [ "$ZONENAME" != "global" ]; then 312 for option in `echo $mode | tr , '\012'`; do 313 # 314 # should not see any zone options 315 # but our own 316 # 317 if [ "$option" = "zone=$ZONENAME" ]; then 318 break 319 fi 320 done 321 if [ "$option" != "zone=$ZONENAME" ]; then 322 continue 323 fi 324 # we are called from the global zone 325 else 326 for option in `echo $mode | tr , '\012'`; do 327 case "$option" in 328 zone=*) 329 option="zone=" 330 break 331 ;; 332 esac 333 done 334 # skip mounts from non-global zones if ZFLAG is not set 335 if [ "$option" = "zone=" -a -z "$ZFLAG" ]; then 336 continue 337 fi 338 # skip mounts from the global zone if ZFLAG is set 339 if [ "$option" != "zone=" -a -n "$ZFLAG" ]; then 340 continue 341 fi 342 fi 343 if [ -n "${KFLAG}" ]; then 344 fuser -c -k $mountp 1>&2 345 sleep 2 346 fi 347 if [ -n "$SFLAG" ]; then 348 umount ${UMOUNTFLAG} ${mountp} 1>&2 349 trc=$? 350 if [ $trc -ne 0 ]; then 351 rc=$trc 352 fi 353 else 354 # We want to umount in parallel 355 fslist="$fslist $mountp" 356 fi 357 esac 358 done 359 360 if [ -n "$fslist" ]; then 361 umount -a ${UMOUNTFLAG} $fslist 1>&2 362 trc=$? 363 if [ $trc -ne 0 ]; then 364 rc=$trc 365 fi 366 fi 367 368 echo $rc 369 ) 370} 371 372# 373# /etc/mnttab has the most recent mounts last. Reverse it so that we 374# may umount in opposite order to the original mounts. 375# 376 377if [ ! -x /usr/bin/tail ]; then 378 exec < $MNTTAB 379 REVERSED= 380 while read line; do 381 if [ -n "$REVERSED" ]; then 382 REVERSED="$line\n$REVERSED" 383 else 384 REVERSED="$line" 385 fi 386 done 387 388 error=`echo $REVERSED | doumounts` 389else 390 error=`tail -r $MNTTAB | doumounts` 391fi 392 393exit $error 394