security revision 1.34
1#!/bin/sh - 2# 3# $NetBSD: security,v 1.34 1999/02/18 18:53:33 abs Exp $ 4# from: @(#)security 8.1 (Berkeley) 6/9/93 5# 6 7PATH=/sbin:/usr/sbin:/bin:/usr/bin 8 9if [ -f /etc/rc.subr ]; then 10 . /etc/rc.subr 11else 12 echo "Can't read /etc/rc.subr; aborting." 13 exit 1; 14fi 15 16umask 077 17 18if [ -s /etc/security.conf ]; then 19 . /etc/security.conf 20fi 21 22SECUREDIR=/tmp/_securedir.$$ 23if ! mkdir $SECUREDIR; then 24 echo can not create $SECUREDIR. 25 exit 1 26fi 27 28if ! cd $SECUREDIR; then 29 echo can not chdir to $SECUREDIR. 30 exit 1 31fi 32 33if [ -z "$max_loginlen" ];then 34 max_loginlen=8 35fi 36 37ERR=secure1.$$ 38TMP1=secure2.$$ 39TMP2=secure3.$$ 40MPBYUID=secure4.$$ 41MPBYPATH=secure5.$$ 42LIST=secure6.$$ 43OUTPUT=secure7.$$ 44LABELS=secure8.$$ 45 46trap '/bin/rm -rf $SECUREDIR ; exit 0' 0 2 3 47 48MP=/etc/master.passwd 49 50# these is used several times. 51awk -F: '!/^+/ { print $1 " " $3 }' $MP | sort -k2n > $MPBYUID 52awk -F: '{ print $1 " " $9 }' $MP | sort -k2 > $MPBYPATH 53 54# Check the master password file syntax. 55# 56if checkyesno check_passwd; then 57 awk -v "len=$max_loginlen" ' 58 BEGIN { 59 while ( getline < "/etc/shells" > 0 ) { 60 if ($LINE ~ /^\#/ || $LINE ~ /^$/ ) 61 continue; 62 shells[$1]++; 63 } 64 FS=":"; 65 } 66 67 { 68 if ($0 ~ /^[ ]*$/) { 69 printf "Line %d is a blank line.\n", NR; 70 next; 71 } 72 if (NF != 10 && ($1 != "+" || NF != 1)) 73 printf "Line %d has the wrong number of fields.\n", NR; 74 if ($1 == "+" ) { 75 if (NF != 1 && $3 == 0) 76 printf "Line %d includes entries with uid 0.\n", NR; 77 next; 78 } 79 if ($1 !~ /^[A-Za-z0-9]*$/) 80 printf "Login %s has non-alphanumeric characters.\n", 81 $1; 82 if (length($1) > len) 83 printf "Login %s has more than "len" characters.\n", $1; 84 if ($2 == "") 85 printf "Login %s has no password.\n", $1; 86 if (length($2) != 13 && length($2) != 20 && $2 != "") { 87 if ($10 == "" || shells[$10]) 88 printf "Login %s is off but still has a valid shell (%s)\n", 89 $1, $10; 90 } else if (! shells[$10]) 91 printf "Login %s does not have a valid shell (%s)\n", 92 $1, $10; 93 if ($3 == 0 && $1 != "root" && $1 != "toor") 94 printf "Login %s has a user id of 0.\n", $1; 95 if ($3 < 0) 96 printf "Login %s has a negative user id.\n", $1; 97 if ($4 < 0) 98 printf "Login %s has a negative group id.\n", $1; 99 }' < $MP > $OUTPUT 100 if [ -s $OUTPUT ] ; then 101 printf "\nChecking the $MP file:\n" 102 cat $OUTPUT 103 fi 104 105 awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT 106 if [ -s $OUTPUT ] ; then 107 printf "\n$MP has duplicate user names.\n" 108 column $OUTPUT 109 fi 110 111 < $MPBYUID uniq -d -f 1 | awk '{ print $2 }' > $TMP2 112 if [ -s $TMP2 ] ; then 113 printf "\n$MP has duplicate user id's.\n" 114 while read uid; do 115 grep -w $uid $MPBYUID 116 done < $TMP2 | column 117 fi 118fi 119 120# Backup the master password file; a special case, the normal backup 121# mechanisms also print out file differences and we don't want to do 122# that because this file has encrypted passwords in it. 123# 124CUR=/var/backups/`basename $MP`.current 125BACK=/var/backups/`basename $MP`.backup 126if [ -s $CUR ] ; then 127 if cmp -s $CUR $MP; then 128 : 129 else 130 cp -p $CUR $BACK 131 cp -p $MP $CUR 132 chown root.wheel $CUR 133 fi 134else 135 cp -p $MP $CUR 136 chown root.wheel $CUR 137fi 138 139# Check the group file syntax. 140# 141if checkyesno check_group; then 142 GRP=/etc/group 143 awk -F: '{ 144 if ($0 ~ /^[ ]*$/) { 145 printf "Line %d is a blank line.\n", NR; 146 next; 147 } 148 if (NF != 4 && ($1 != "+" || NF != 1)) 149 printf "Line %d has the wrong number of fields.\n", NR; 150 if ($1 == "+" ) { 151 next; 152 } 153 if ($1 !~ /^[A-za-z0-9]*$/) 154 printf "Group %s has non-alphanumeric characters.\n", 155 $1; 156 if (length($1) > 8) 157 printf "Group %s has more than 8 characters.\n", $1; 158 if ($3 !~ /[0-9]*/) 159 printf "Login %s has a negative group id.\n", $1; 160 }' < $GRP > $OUTPUT 161 if [ -s $OUTPUT ] ; then 162 printf "\nChecking the $GRP file:\n" 163 cat $OUTPUT 164 fi 165 166 awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT 167 if [ -s $OUTPUT ] ; then 168 printf "\n$GRP has duplicate group names.\n" 169 column $OUTPUT 170 fi 171fi 172 173# Check for root paths, umask values in startup files. 174# The check for the root paths is problematical -- it's likely to fail 175# in other environments. Once the shells have been modified to warn 176# of '.' in the path, the path tests should go away. 177# 178if checkyesno check_rootdotfiles; then 179 > $OUTPUT 180 rhome=`csh -fc "echo ~root"` 181 umaskset=no 182 list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login" 183 for i in $list ; do 184 if [ -f $i ] ; then 185 if egrep umask $i > /dev/null ; then 186 umaskset=yes 187 fi 188 egrep umask $i | 189 awk '$2 % 100 < 20 \ 190 { print "\tRoot umask is group writeable" } 191 $2 % 10 < 2 \ 192 { print "\tRoot umask is other writeable" }' \ 193 >> $OUTPUT 194 SAVE_PATH=$PATH 195 unset PATH 196 /bin/csh -f -s << end-of-csh > /dev/null 2>&1 197 source $i 198 /bin/ls -ldgT \$path > $TMP1 199end-of-csh 200 PATH=$SAVE_PATH 201 awk '{ 202 if ($10 ~ /^\.$/) { 203 print "\tThe root path includes ."; 204 next; 205 } 206 } 207 $1 ~ /^d....w/ \ 208 { print "\tRoot path directory " $10 " is group writeable." } \ 209 $1 ~ /^d.......w/ \ 210 { print "\tRoot path directory " $10 " is other writeable." }' \ 211 < $TMP1 >> $OUTPUT 212 fi 213 done 214 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 215 printf "\nChecking root csh paths, umask values:\n$list\n\n" 216 if [ -s $OUTPUT ]; then 217 cat $OUTPUT 218 fi 219 if [ $umaskset = "no" ] ; then 220 printf "\tRoot csh startup files do not set the umask.\n" 221 fi 222 fi 223 224 > $OUTPUT 225 rhome=/root 226 umaskset=no 227 list="/etc/profile ${rhome}/.profile" 228 for i in $list; do 229 if [ -f $i ] ; then 230 if egrep umask $i > /dev/null ; then 231 umaskset=yes 232 fi 233 egrep umask $i | 234 awk '$2 % 100 < 20 \ 235 { print "\tRoot umask is group writeable" } \ 236 $2 % 10 < 2 \ 237 { print "\tRoot umask is other writeable" }' \ 238 >> $OUTPUT 239 SAVE_PATH=$PATH 240 unset PATH 241 /bin/sh << end-of-sh > /dev/null 2>&1 242 . $i 243 list=\`echo \$PATH | /usr/bin/sed -e \ 244 's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g'\` 245 /bin/ls -ldgT \$list > $TMP1 246end-of-sh 247 PATH=$SAVE_PATH 248 awk '{ 249 if ($10 ~ /^\.$/) { 250 print "\tThe root path includes ."; 251 next; 252 } 253 } 254 $1 ~ /^d....w/ \ 255 { print "\tRoot path directory " $10 " is group writeable." } \ 256 $1 ~ /^d.......w/ \ 257 { print "\tRoot path directory " $10 " is other writeable." }' \ 258 < $TMP1 >> $OUTPUT 259 260 fi 261 done 262 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 263 printf "\nChecking root sh paths, umask values:\n$list\n" 264 if [ -s $OUTPUT ]; then 265 cat $OUTPUT 266 fi 267 if [ $umaskset = "no" ] ; then 268 printf "\tRoot sh startup files do not set the umask.\n" 269 fi 270 fi 271fi 272 273# Root and uucp should both be in /etc/ftpusers. 274# 275if checkyesno check_ftpusers; then 276 > $OUTPUT 277 list="uucp "`awk '$2 == 0 { print $1 }' $MPBYUID` 278 for i in $list; do 279 if /usr/libexec/ftpd -C $i ; then 280 printf "\t$i is not denied\n" >> $OUTPUT 281 fi 282 done 283 if [ -s $OUTPUT ]; then 284 printf "\nChecking the /etc/ftpusers configuration:\n" 285 cat $OUTPUT 286 fi 287fi 288 289# Uudecode should not be in the /etc/aliases file. 290# 291if checkyesno check_aliases; then 292 if egrep '^[^#]*(uudecode|decode).*\|' /etc/aliases; then 293 printf "\nEntry for uudecode in /etc/aliases file.\n" 294 fi 295fi 296 297# Files that should not have + signs. 298# 299if checkyesno check_rhosts; then 300 list="/etc/hosts.equiv /etc/hosts.lpd" 301 for f in $list ; do 302 if [ -f $f ] && egrep '\+' $f > /dev/null ; then 303 printf "\nPlus sign in $f file.\n" 304 fi 305 done 306 307 # Check for special users with .rhosts files. Only root and toor should 308 # have .rhosts files. Also, .rhosts files should not have plus signs. 309 awk -F: '$1 != "root" && $1 != "toor" && \ 310 ($3 < 100 || $1 == "ftp" || $1 == "uucp") \ 311 { print $1 " " $9 }' $MP | 312 sort -k2 | 313 while read uid homedir; do 314 if [ -f ${homedir}/.rhosts ] ; then 315 rhost=`ls -ldgT ${homedir}/.rhosts` 316 printf "$uid: $rhost\n" 317 fi 318 done > $OUTPUT 319 if [ -s $OUTPUT ] ; then 320 printf "\nChecking for special users with .rhosts files.\n" 321 cat $OUTPUT 322 fi 323 324 while read uid homedir; do 325 if [ -f ${homedir}/.rhosts ] && \ 326 egrep '\+' ${homedir}/.rhosts > /dev/null ; then 327 printf "$uid: + in .rhosts file.\n" 328 fi 329 done < $MPBYPATH > $OUTPUT 330 if [ -s $OUTPUT ] ; then 331 printf "\nChecking .rhosts files syntax.\n" 332 cat $OUTPUT 333 fi 334fi 335 336# Check home directories. Directories should not be owned by someone else 337# or writeable. 338# 339if checkyesno check_homes; then 340 while read uid homedir; do 341 if [ -d ${homedir}/ ] ; then 342 file=`ls -ldgT ${homedir}` 343 printf "$uid $file\n" 344 fi 345 done < $MPBYPATH | 346 awk '$1 != $4 && $4 != "root" \ 347 { print "user " $1 " home directory is owned by " $4 } 348 $2 ~ /^-....w/ \ 349 { print "user " $1 " home directory is group writeable" } 350 $2 ~ /^-.......w/ \ 351 { print "user " $1 " home directory is other writeable" }' \ 352 > $OUTPUT 353 if [ -s $OUTPUT ] ; then 354 printf "\nChecking home directories.\n" 355 cat $OUTPUT 356 fi 357 358 # Files that should not be owned by someone else or readable. 359 list=".Xauthority .netrc" 360 while read uid homedir; do 361 for f in $list ; do 362 file=${homedir}/${f} 363 if [ -f $file ] ; then 364 printf "$uid $f `ls -ldgT $file`\n" 365 fi 366 done 367 done < $MPBYPATH | 368 awk '$1 != $5 && $5 != "root" \ 369 { print "user " $1 " " $2 " file is owned by " $5 } 370 $3 ~ /^-...r/ \ 371 { print "user " $1 " " $2 " file is group readable" } 372 $3 ~ /^-......r/ \ 373 { print "user " $1 " " $2 " file is other readable" } 374 $3 ~ /^-....w/ \ 375 { print "user " $1 " " $2 " file is group writeable" } 376 $3 ~ /^-.......w/ \ 377 { print "user " $1 " " $2 " file is other writeable" }' \ 378 > $OUTPUT 379 380 # Files that should not be owned by someone else or writeable. 381 list=".bash_history .bash_login .bash_logout .bash_profile .bashrc \ 382 .cshrc .emacs .exrc .forward .history .klogin .login .logout \ 383 .profile .qmail .rc_history .rhosts .tcshrc .twmrc .xinitrc \ 384 .xsession" 385 while read uid homedir; do 386 for f in $list ; do 387 file=${homedir}/${f} 388 if [ -f $file ] ; then 389 printf "$uid $f `ls -ldgT $file`\n" 390 fi 391 done 392 done < $MPBYPATH | 393 awk '$1 != $5 && $5 != "root" \ 394 { print "user " $1 " " $2 " file is owned by " $5 } 395 $3 ~ /^-....w/ \ 396 { print "user " $1 " " $2 " file is group writeable" } 397 $3 ~ /^-.......w/ \ 398 { print "user " $1 " " $2 " file is other writeable" }' \ 399 >> $OUTPUT 400 if [ -s $OUTPUT ] ; then 401 printf "\nChecking dot files.\n" 402 cat $OUTPUT 403 fi 404fi 405 406# Mailboxes should be owned by user and unreadable. 407# 408if checkyesno check_varmail; then 409 ls -l /var/mail | sed 1d | \ 410 awk '$3 != $9 \ 411 { print "user " $9 " mailbox is owned by " $3 } 412 $1 != "-rw-------" \ 413 { print "user " $9 " mailbox is " $1 ", group " $4 }' > $OUTPUT 414 if [ -s $OUTPUT ] ; then 415 printf "\nChecking mailbox ownership.\n" 416 cat $OUTPUT 417 fi 418fi 419 420# NFS exports shouldn't be globally exported 421# 422if checkyesno check_nfs && [ -f /etc/exports ]; then 423 awk '{ 424 # ignore comments and blank lines 425 if ($LINE ~ /^\#/ || $LINE ~ /^$/ ) 426 next; 427 428 readonly = 0; 429 for (i = 2; i <= NF; ++i) { 430 if ($i ~ /-ro/) 431 readonly = 1; 432 else if ($i !~ /^-/) 433 next; 434 } 435 if (readonly) 436 print "File system " $1 " globally exported, read-only." 437 else 438 print "File system " $1 " globally exported, read-write." 439 }' < /etc/exports > $OUTPUT 440 if [ -s $OUTPUT ] ; then 441 printf "\nChecking for globally exported file systems.\n" 442 cat $OUTPUT 443 fi 444fi 445 446# Display any changes in setuid files and devices. 447# 448if checkyesno check_devices; then 449 > $ERR 450 (find / \( ! -fstype local -o -fstype fdesc -o -fstype kernfs \ 451 -o -fstype procfs \) -a -prune -o \ 452 \( \( -perm -u+s -a ! -type d \) -o \ 453 \( -perm -g+s -a ! -type d \) -o \ 454 -type b -o -type c \) -print0 | \ 455 xargs -0 ls -ldgTq | sort +9 > $LIST) 2> $OUTPUT 456 457 # Display any errors that occurred during system file walk. 458 if [ -s $OUTPUT ] ; then 459 printf "Setuid/device find errors:\n" >> $ERR 460 cat $OUTPUT >> $ERR 461 printf "\n" >> $ERR 462 fi 463 464 # Display any changes in the setuid file list. 465 egrep -v '^[bc]' $LIST > $TMP1 466 if [ -s $TMP1 ] ; then 467 # Check to make sure uudecode isn't setuid. 468 if grep -w uudecode $TMP1 > /dev/null ; then 469 printf "\nUudecode is setuid.\n" >> $ERR 470 fi 471 472 CUR=/var/backups/setuid.current 473 BACK=/var/backups/setuid.backup 474 475 if [ -s $CUR ] ; then 476 if cmp -s $CUR $TMP1 ; then 477 : 478 else 479 > $TMP2 480 join -110 -210 -v2 $CUR $TMP1 > $OUTPUT 481 if [ -s $OUTPUT ] ; then 482 printf "Setuid additions:\n" >> $ERR 483 tee -a $TMP2 < $OUTPUT >> $ERR 484 printf "\n" >> $ERR 485 fi 486 487 join -110 -210 -v1 $CUR $TMP1 > $OUTPUT 488 if [ -s $OUTPUT ] ; then 489 printf "Setuid deletions:\n" >> $ERR 490 tee -a $TMP2 < $OUTPUT >> $ERR 491 printf "\n" >> $ERR 492 fi 493 494 sort -k10 $TMP2 $CUR $TMP1 | \ 495 sed -e 's/[ ][ ]*/ /g' | \ 496 uniq -u > $OUTPUT 497 if [ -s $OUTPUT ] ; then 498 printf "Setuid changes:\n" >> $ERR 499 column -t $OUTPUT >> $ERR 500 printf "\n" >> $ERR 501 fi 502 503 cp $CUR $BACK 504 cp $TMP1 $CUR 505 fi 506 else 507 printf "Setuid additions:\n" >> $ERR 508 column -t $TMP1 >> $ERR 509 printf "\n" >> $ERR 510 cp $TMP1 $CUR 511 fi 512 fi 513 514 # Check for block and character disk devices that are readable or 515 # writeable or not owned by root.operator. 516 >$TMP1 517 DISKLIST="acd ccd cd ch fd hk hp mcd md ra rb rd rl rx rz \ 518 sd se ss tz uk up vnd wd xd xy" 519# DISKLIST="$DISKLIST ct mt st wt" 520 for i in $DISKLIST; do 521 egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 522 egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 523 done 524 525 awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \ 526 { printf "Disk %s is user %s, group %s, permissions %s.\n", \ 527 $11, $3, $4, $1; }' < $TMP1 > $OUTPUT 528 if [ -s $OUTPUT ] ; then 529 printf "\nChecking disk ownership and permissions.\n" >> $ERR 530 cat $OUTPUT >> $ERR 531 printf "\n" >> $ERR 532 fi 533 534 # Display any changes in the device file list. 535 egrep '^[bc]' $LIST | sort -k11 > $TMP1 536 if [ -s $TMP1 ] ; then 537 CUR=/var/backups/device.current 538 BACK=/var/backups/device.backup 539 540 if [ -s $CUR ] ; then 541 if cmp -s $CUR $TMP1 ; then 542 : 543 else 544 > $TMP2 545 join -111 -211 -v2 $CUR $TMP1 > $OUTPUT 546 if [ -s $OUTPUT ] ; then 547 printf "Device additions:\n" >> $ERR 548 tee -a $TMP2 < $OUTPUT >> $ERR 549 printf "\n" >> $ERR 550 fi 551 552 join -111 -211 -v1 $CUR $TMP1 > $OUTPUT 553 if [ -s $OUTPUT ] ; then 554 printf "Device deletions:\n" >> $ERR 555 tee -a $TMP2 < $OUTPUT >> $ERR 556 printf "\n" >> $ERR 557 fi 558 559 # Report any block device change. Ignore 560 # character devices, only the name is 561 # significant. 562 cat $TMP2 $CUR $TMP1 | \ 563 sed -e '/^c/d' | \ 564 sort -k11 | \ 565 sed -e 's/[ ][ ]*/ /g' | \ 566 uniq -u > $OUTPUT 567 if [ -s $OUTPUT ] ; then 568 printf "Block device changes:\n" >> $ERR 569 column -t $OUTPUT >> $ERR 570 printf "\n" >> $ERR 571 fi 572 573 cp $CUR $BACK 574 cp $TMP1 $CUR 575 fi 576 else 577 printf "Device additions:\n" >> $ERR 578 column -t $TMP1 >> $ERR 579 printf "\n" >> $ERR 580 cp $TMP1 $CUR >> $ERR 581 fi 582 fi 583 if [ -s $ERR ] ; then 584 printf "\nChecking setuid files and devices:\n" 585 cat $ERR 586 printf "\n" 587 fi 588fi 589 590# Check special files. 591# Check system binaries. 592# 593# Create the mtree tree specifications using: 594# 595# mtree -cx -pDIR -kcksum,gid,mode,nlink,size,link,time,uid > DIR.secure 596# chown root.wheel DIR.secure 597# chmod 600 DIR.secure 598# 599# Note, this is not complete protection against Trojan horsed binaries, as 600# the hacker can modify the tree specification to match the replaced binary. 601# For details on really protecting yourself against modified binaries, see 602# the mtree(8) manual page. 603# 604if checkyesno check_mtree; then 605 mtree -e -p / -f /etc/mtree/special > $OUTPUT 606 if [ -s $OUTPUT ]; then 607 printf "\nChecking special files and directories.\n" 608 cat $OUTPUT 609 fi 610 611 > $OUTPUT 612 for file in /etc/mtree/*.secure; do 613 [ $file = '/etc/mtree/*.secure' ] && continue 614 tree=`sed -n -e '3s/.* //p' -e 3q $file` 615 mtree -f $file -p $tree > $TMP1 616 if [ -s $TMP1 ]; then 617 printf "\nChecking $tree:\n" >> $OUTPUT 618 cat $TMP1 >> $OUTPUT 619 fi 620 done 621 if [ -s $OUTPUT ]; then 622 printf "\nChecking system binaries:\n" 623 cat $OUTPUT 624 fi 625fi 626 627CHANGELIST="" 628 629# Backup disklabels of available disks 630# 631if checkyesno check_disklabels; then 632 # generate list of old disklabels and remove them 633 ls -1d /var/backups/disklabel.* 2>/dev/null | 634 egrep -v '\.(backup|current)$' > $LABELS 635 xargs rm < $LABELS 636 637 disks=`iostat -x | sed 1d | awk '$1 !~ /^[mf]d/ { print $1; }'` 638 for i in $disks; do 639 dlf="/var/backups/disklabel.$i" 640 disklabel $i > $dlf 2>/dev/null 641 done 642 643 # append list of new disklabels, sort list 644 ls -1d /var/backups/disklabel.* 2>/dev/null | 645 egrep -v '\.(backup|current)$' >> $LABELS 646 sort -u -o $LABELS $LABELS 647 CHANGELIST=$LABELS 648fi 649 650# List of files that get backed up and checked for any modifications. Each 651# file is expected to have two backups, /var/backups/file.{current,backup}. 652# Any changes cause the files to rotate. 653# 654if checkyesno check_changelist && [ -s /etc/changelist ] ; then 655 CHANGELIST="/etc/changelist $CHANGELIST" 656fi 657 658if [ -n "$CHANGELIST" ]; then 659 for file in `egrep -hv "^#|$MP" $CHANGELIST`; do 660 CUR=/var/backups/`basename $file`.current 661 BACK=/var/backups/`basename $file`.backup 662 if [ -f $file ]; then 663 if [ -f $CUR ] ; then 664 diff $CUR $file > $OUTPUT 665 if [ -s $OUTPUT ] ; then 666 printf "\n======\n%s diffs (OLD < > NEW)\n======\n" $file 667 cat $OUTPUT 668 mv -f $CUR $BACK 669 cp -p $file $CUR 670 chown root.wheel $CUR 671 fi 672 else 673 printf "\n======\n%s added\n======\n" $file 674 diff /dev/null $file 675 cp -p $file $CUR 676 chown root.wheel $CUR 677 fi 678 else 679 if [ -f $CUR ]; then 680 printf "\n======\n%s removed\n======\n" $file 681 diff $CUR /dev/null 682 mv -f $CUR $BACK 683 fi 684 fi 685 done 686fi 687