tests/functions.sh

   1 #
   2 # Copyright (C) 2007 Karel Zak <kzak@redhat.com>
   3 #
   4 # This file is part of util-linux.
   5 #
   6 # This file is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This file is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16
  17
  18 function ts_abspath {
  19         cd $1
  20         pwd
  21 }
  22
  23 function ts_canonicalize {
  24         P="$1"
  25         C=$(readlink -f $P)
  26
  27         if [ -n "$C" ]; then
  28                 echo "$C"
  29         else
  30                 echo "$P"
  31         fi
  32 }
  33
  34 function ts_cd {
  35         if [ $# -eq 0 ]; then
  36                 ts_failed "ul_cd: not enough arguments"
  37         fi
  38         DEST=$(readlink -f "$1" 2>/dev/null)
  39         if [ "x$DEST" = "x" ] || [ ! -d "$DEST" ]; then
  40                 ts_failed "ul_cd: $1: no such directory"
  41         fi
  42         cd "$DEST" 2>/dev/null || ts_failed "ul_cd: $1: cannot change directory"
  43         if [ "$PWD" != "$DEST" ]; then
  44                 ts_failed "ul_cd: $PWD is not $DEST"
  45         fi
  46 }
  47
  48 function ts_report {
  49         if [ "$TS_PARALLEL" == "yes" ]; then
  50                 echo "$TS_TITLE $1"
  51         else
  52                 echo "$1"
  53         fi
  54 }
  55
  56 function ts_check_test_command {
  57         if [ ! -x "$1" ]; then
  58                 ts_skip "${1##*/} not found"
  59         fi
  60 }
  61
  62 function ts_check_prog {
  63         local cmd=$1
  64         type "$cmd" >/dev/null 2>&1 || ts_skip "missing in PATH: $cmd"
  65 }
  66
  67 function ts_check_losetup {
  68         local tmp
  69         ts_check_test_command "$TS_CMD_LOSETUP"
  70
  71         if [ "$TS_SKIP_LOOPDEVS" = "yes" ]; then
  72                 ts_skip "loop-device tests disabled"
  73         fi
  74
  75         # assuming that losetup -f works ... to be checked somewhere else
  76         tmp=$($TS_CMD_LOSETUP -f 2>/dev/null)
  77         if test -b "$tmp"; then
  78                 return 0
  79         fi
  80         ts_skip "no loop-device support"
  81 }
  82
  83 function ts_skip_subtest {
  84         ts_report " SKIPPED ($1)"
  85 }
  86
  87 function ts_skip {
  88         ts_skip_subtest "$1"
  89         if [ -n "$2" -a -b "$2" ]; then
  90                 ts_device_deinit "$2"
  91         fi
  92         exit 0
  93 }
  94
  95 function ts_skip_nonroot {
  96         if [ $UID -ne 0 ]; then
  97                 ts_skip "no root permissions"
  98         fi
  99 }
 100
 101 function ts_failed_subtest {
 102         local msg="FAILED"
 103         local ret=1
 104         if [ "$TS_KNOWN_FAIL" = "yes" ]; then
 105                 msg="KNOWN FAILED"
 106                 ret=0
 107         fi
 108
 109         if [ x"$1" == x"" ]; then
 110                 ts_report " $msg ($TS_NS)"
 111         else
 112                 ts_report " $msg ($1)"
 113         fi
 114
 115         return $ret
 116 }
 117
 118 function ts_failed {
 119         ts_failed_subtest "$1"
 120         exit $?
 121 }
 122
 123 function ts_ok_subtest {
 124         if [ x"$1" == x"" ]; then
 125                 ts_report " OK"
 126         else
 127                 ts_report " OK ($1)"
 128         fi
 129 }
 130
 131 function ts_ok {
 132         ts_ok_subtest "$1"
 133         exit 0
 134 }
 135
 136 function ts_log {
 137         echo "$1" >> $TS_OUTPUT
 138         [ "$TS_VERBOSE" == "yes" ] && echo "$1"
 139 }
 140
 141 function ts_has_option {
 142         NAME="$1"
 143         ALL="$2"
 144
 145         # user may set options by env for a single test or whole component
 146         # e.g. TS_OPT_ipcs_limits2_fake="yes" or TS_OPT_ipcs_fake="yes"
 147         local v_test=${TS_TESTNAME//[-.]/_}
 148         local v_comp=${TS_COMPONENT//[-.]/_}
 149         local v_name=${NAME//[-.]/_}
 150         eval local env_opt_test=\$TS_OPT_${v_comp}_${v_test}_${v_name}
 151         eval local env_opt_comp=\$TS_OPT_${v_comp}_${v_name}
 152         if [ "$env_opt_test" = "yes" \
 153                 -o "$env_opt_comp" = "yes" -a "$env_opt_test" != "no" ]; then
 154                 echo "yes"
 155                 return
 156         elif [ "$env_opt_test" = "no" \
 157                 -o "$env_opt_comp" = "no" -a "$env_opt_test" != "yes" ]; then
 158                 return
 159         fi
 160
 161         # or just check the global command line options
 162         echo -n $ALL | sed 's/ //g' | awk 'BEGIN { FS="="; RS="--" } /('$NAME'$|'$NAME'=)/ { print "yes" }'
 163 }
 164
 165 function ts_option_argument {
 166         NAME="$1"
 167         ALL="$2"
 168         echo -n $ALL | sed 's/ //g' | awk 'BEGIN { FS="="; RS="--" } /'$NAME'=/ { print $2 }'
 169 }
 170
 171 function ts_init_core_env {
 172         TS_NS="$TS_COMPONENT/$TS_TESTNAME"
 173         TS_OUTPUT="$TS_OUTDIR/$TS_TESTNAME"
 174         TS_VGDUMP="$TS_OUTDIR/$TS_TESTNAME.vgdump"
 175         TS_DIFF="$TS_DIFFDIR/$TS_TESTNAME"
 176         TS_EXPECTED="$TS_TOPDIR/expected/$TS_NS"
 177         TS_MOUNTPOINT="$TS_OUTDIR/${TS_TESTNAME}-mnt"
 178 }
 179
 180 function ts_init_core_subtest_env {
 181         TS_NS="$TS_COMPONENT/$TS_TESTNAME-$TS_SUBNAME"
 182         TS_OUTPUT="$TS_OUTDIR/$TS_TESTNAME-$TS_SUBNAME"
 183         TS_VGDUMP="$TS_OUTDIR/$TS_TESTNAME-$TS_SUBNAME.vgdump"
 184         TS_DIFF="$TS_DIFFDIR/$TS_TESTNAME-$TS_SUBNAME"
 185         TS_EXPECTED="$TS_TOPDIR/expected/$TS_NS"
 186         TS_MOUNTPOINT="$TS_OUTDIR/${TS_TESTNAME}-${TS_SUBNAME}-mnt"
 187
 188         rm -f $TS_OUTPUT $TS_VGDUMP
 189         [ -d "$TS_OUTDIR" ]  || mkdir -p "$TS_OUTDIR"
 190
 191         touch $TS_OUTPUT
 192         [ -n "$TS_VALGRIND_CMD" ] && touch $TS_VGDUMP
 193 }
 194
 195 function ts_init_env {
 196         local mydir=$(ts_abspath ${0%/*})
 197         local tmp
 198
 199         LANG="POSIX"
 200         LANGUAGE="POSIX"
 201         LC_ALL="POSIX"
 202         CHARSET="UTF-8"
 203
 204         export LANG LANGUAGE LC_ALL CHARSET
 205
 206         mydir=$(ts_canonicalize "$mydir")
 207
 208         # automake directories
 209         top_srcdir=$(ts_option_argument "srcdir" "$*")
 210         top_builddir=$(ts_option_argument "builddir" "$*")
 211
 212         # where is this script
 213         TS_TOPDIR=$(ts_abspath $mydir/../../)
 214
 215         # default
 216         if [ -z "$top_srcdir" ]; then
 217                 top_srcdir="$TS_TOPDIR/.."
 218         fi
 219         if [ -z "$top_builddir" ]; then
 220                 top_builddir="$TS_TOPDIR/.."
 221         fi
 222
 223         top_srcdir=$(ts_abspath $top_srcdir)
 224         top_builddir=$(ts_abspath $top_builddir)
 225
 226         TS_SCRIPT="$mydir/$(basename $0)"
 227         TS_SUBDIR=$(dirname $TS_SCRIPT)
 228         TS_TESTNAME=$(basename $TS_SCRIPT)
 229         TS_COMPONENT=$(basename $TS_SUBDIR)
 230
 231         TS_NSUBTESTS=0
 232         TS_NSUBFAILED=0
 233
 234         TS_SELF="$TS_SUBDIR"
 235
 236         TS_OUTDIR="$top_builddir/tests/output/$TS_COMPONENT"
 237         TS_DIFFDIR="$top_builddir/tests/diff/$TS_COMPONENT"
 238
 239         ts_init_core_env
 240
 241         TS_VERBOSE=$(ts_has_option "verbose" "$*")
 242         TS_PARALLEL=$(ts_has_option "parallel" "$*")
 243         TS_KNOWN_FAIL=$(ts_has_option "known-fail" "$*")
 244         TS_SKIP_LOOPDEVS=$(ts_has_option "skip-loopdevs" "$*")
 245
 246         tmp=$( ts_has_option "memcheck" "$*")
 247         if [ "$tmp" == "yes" -a -f /usr/bin/valgrind ]; then
 248                 TS_VALGRIND_CMD="/usr/bin/valgrind"
 249         fi
 250
 251         BLKID_FILE="$TS_OUTDIR/${TS_TESTNAME}.blkidtab"
 252
 253         declare -a TS_SUID_PROGS
 254         declare -a TS_SUID_USER
 255         declare -a TS_SUID_GROUP
 256
 257         if [ -f $TS_TOPDIR/commands.sh ]; then
 258                 . $TS_TOPDIR/commands.sh
 259         fi
 260
 261         export BLKID_FILE
 262
 263         rm -f $TS_OUTPUT $TS_VGDUMP
 264         [ -d "$TS_OUTDIR" ]  || mkdir -p "$TS_OUTDIR"
 265
 266         touch $TS_OUTPUT
 267         [ -n "$TS_VALGRIND_CMD" ] && touch $TS_VGDUMP
 268
 269         if [ "$TS_VERBOSE" == "yes" ]; then
 270                 echo
 271                 echo "     script: $TS_SCRIPT"
 272                 echo "    sub dir: $TS_SUBDIR"
 273                 echo "    top dir: $TS_TOPDIR"
 274                 echo "       self: $TS_SELF"
 275                 echo "  test name: $TS_TESTNAME"
 276                 echo "  test desc: $TS_DESC"
 277                 echo "  component: $TS_COMPONENT"
 278                 echo "  namespace: $TS_NS"
 279                 echo "    verbose: $TS_VERBOSE"
 280                 echo "     output: $TS_OUTPUT"
 281                 echo "   valgrind: $TS_VGDUMP"
 282                 echo "   expected: $TS_EXPECTED"
 283                 echo " mountpoint: $TS_MOUNTPOINT"
 284                 echo
 285         fi
 286 }
 287
 288 function ts_init_subtest {
 289
 290         TS_SUBNAME="$1"
 291
 292         ts_init_core_subtest_env
 293
 294         [ $TS_NSUBTESTS -eq 0 ] && echo
 295         TS_NSUBTESTS=$(( $TS_NSUBTESTS + 1 ))
 296
 297         if [ "$TS_PARALLEL" == "yes" ]; then
 298                 TS_TITLE=$(printf "%13s: %-30s ...\n%16s: %-27s ..." "$TS_COMPONENT" "$TS_DESC" "" "$TS_SUBNAME")
 299         else
 300                 TS_TITLE=$(printf "%16s: %-27s ..." "" "$TS_SUBNAME")
 301                 echo -n "$TS_TITLE"
 302         fi
 303 }
 304
 305 function ts_init {
 306         ts_init_env "$*"
 307
 308         local is_fake=$( ts_has_option "fake" "$*")
 309         local is_force=$( ts_has_option "force" "$*")
 310
 311         if [ "$TS_PARALLEL" == "yes" ]; then
 312                 TS_TITLE=$(printf "%13s: %-30s ..." "$TS_COMPONENT" "$TS_DESC")
 313         else
 314                 TS_TITLE=$(printf "%13s: %-30s ..." "$TS_COMPONENT" "$TS_DESC")
 315                 echo -n "$TS_TITLE"
 316         fi
 317
 318         [ "$is_fake" == "yes" ] && ts_skip "fake mode"
 319         [ "$TS_OPTIONAL" == "yes" -a "$is_force" != "yes" ] && ts_skip "optional"
 320 }
 321
 322 function ts_init_suid {
 323         PROG="$1"
 324         ct=${#TS_SUID_PROGS[*]}
 325
 326         # Save info about original setting
 327         TS_SUID_PROGS[$ct]=$PROG
 328         TS_SUID_USER[$ct]=$(stat --printf="%U" $PROG)
 329         TS_SUID_GROUP[$ct]=$(stat --printf="%G" $PROG)
 330
 331         chown root.root $PROG &> /dev/null
 332         chmod u+s $PROG &> /dev/null
 333 }
 334
 335 function ts_init_py {
 336         LIBNAME="$1"
 337
 338         [ -f "$top_builddir/py${LIBNAME}.la" ] || ts_skip "py${LIBNAME} not compiled"
 339
 340         export LD_LIBRARY_PATH="$top_builddir/.libs:$LD_LIBRARY_PATH"
 341         export PYTHONPATH="$top_builddir/$LIBNAME/python:$top_builddir/.libs:$PYTHONPATH"
 342
 343         export PYTHON_VERSION=$(awk '/^PYTHON_VERSION/ { print $3 }' $top_builddir/Makefile)
 344         export PYTHON_MAJOR_VERSION=$(echo $PYTHON_VERSION | sed 's/\..*//')
 345
 346         export PYTHON="python${PYTHON_MAJOR_VERSION}"
 347 }
 348
 349 function ts_valgrind {
 350         if [ -z "$TS_VALGRIND_CMD" ]; then
 351                 $*
 352         else
 353                 $TS_VALGRIND_CMD --tool=memcheck --leak-check=full \
 354                                  --leak-resolution=high --num-callers=20 \
 355                                  --log-file="$TS_VGDUMP" $*
 356         fi
 357 }
 358
 359 function ts_gen_diff {
 360         local res=0
 361
 362         if [ -s "$TS_OUTPUT" ]; then
 363
 364                 # remove libtool lt- prefixes
 365                 sed --in-place 's/^lt\-\(.*\: \)/\1/g' $TS_OUTPUT
 366
 367                 [ -d "$TS_DIFFDIR" ] || mkdir -p "$TS_DIFFDIR"
 368                 diff -u $TS_EXPECTED $TS_OUTPUT > $TS_DIFF
 369
 370                 if [ -s $TS_DIFF ]; then
 371                         res=1
 372                 else
 373                         rm -f $TS_DIFF;
 374                 fi
 375         else
 376                 res=1
 377         fi
 378         return $res
 379 }
 380
 381 function tt_gen_mem_report {
 382         [ -z "$TS_VALGRIND_CMD" ] && echo "$1"
 383
 384         grep -q -E 'ERROR SUMMARY: [1-9]' $TS_VGDUMP &> /dev/null
 385         if [ $? -eq 0 ]; then
 386                 echo "mem-error detected!"
 387         fi
 388 }
 389
 390 function ts_finalize_subtest {
 391         local res=0
 392
 393         if [ -s "$TS_EXPECTED" ]; then
 394                 ts_gen_diff
 395                 if [ $? -eq 1 ]; then
 396                         ts_failed_subtest "$1"
 397                         res=1
 398                 else
 399                         ts_ok_subtest "$(tt_gen_mem_report "$1")"
 400                 fi
 401         else
 402                 ts_skip_subtest "output undefined"
 403         fi
 404
 405         [ $res -ne 0 ] && TS_NSUBFAILED=$(( $TS_NSUBFAILED + 1 ))
 406
 407         # reset environment back to parental test
 408         ts_init_core_env
 409
 410         return $res
 411 }
 412
 413 function ts_finalize {
 414         for idx in $(seq 0 $((${#TS_SUID_PROGS[*]} - 1))); do
 415                 PROG=${TS_SUID_PROGS[$idx]}
 416                 chmod a-s $PROG &> /dev/null
 417                 chown ${TS_SUID_USER[$idx]}.${TS_SUID_GROUP[$idx]} $PROG &> /dev/null
 418         done
 419
 420         if [ $TS_NSUBTESTS -ne 0 ]; then
 421                 printf "%11s..."
 422                 if [ $TS_NSUBFAILED -ne 0 ]; then
 423                         ts_failed "$TS_NSUBFAILED from $TS_NSUBTESTS sub-tests"
 424                 else
 425                         ts_ok "all $TS_NSUBTESTS sub-tests PASSED"
 426                 fi
 427         fi
 428
 429         if [ -s $TS_EXPECTED ]; then
 430                 ts_gen_diff
 431                 if [ $? -eq 1 ]; then
 432                         ts_failed "$1"
 433                 fi
 434                 ts_ok "$1"
 435         fi
 436
 437         ts_skip "output undefined"
 438 }
 439
 440 function ts_die {
 441         ts_log "$1"
 442         if [ -n "$2" ] && [ -b "$2" ]; then
 443                 ts_device_deinit "$2"
 444                 ts_fstab_clean          # for sure...
 445         fi
 446         ts_finalize
 447 }
 448
 449 function ts_image_md5sum {
 450         local img=${1:-"$TS_OUTDIR/${TS_TESTNAME}.img"}
 451         echo $(md5sum "$img" | awk '{printf $1}') $(basename "$img")
 452 }
 453
 454 function ts_image_init {
 455         local mib=${1:-"5"}     # size in MiBs
 456         local img=${2:-"$TS_OUTDIR/${TS_TESTNAME}.img"}
 457
 458         dd if=/dev/zero of="$img" bs=1M count=$mib &> /dev/null
 459         echo "$img"
 460         return 0
 461 }
 462
 463 function ts_device_init {
 464         local img
 465         local dev
 466
 467         img=$(ts_image_init $1 $2)
 468         dev=$($TS_CMD_LOSETUP --show -f "$img")
 469
 470         echo $dev
 471 }
 472
 473 function ts_device_deinit {
 474         local DEV="$1"
 475
 476         if [ -b "$DEV" ]; then
 477                 $TS_CMD_UMOUNT "$DEV" &> /dev/null
 478                 $TS_CMD_LOSETUP -d "$DEV" &> /dev/null
 479         fi
 480 }
 481
 482 function ts_uuid_by_devname {
 483         echo $($TS_CMD_BLKID -p -s UUID -o value $1)
 484 }
 485
 486 function ts_label_by_devname {
 487         echo $($TS_CMD_BLKID -p -s LABEL -o value $1)
 488 }
 489
 490 function ts_fstype_by_devname {
 491         echo $($TS_CMD_BLKID -p -s TYPE -o value $1)
 492 }
 493
 494 function ts_device_has {
 495         local TAG="$1"
 496         local VAL="$2"
 497         local DEV="$3"
 498         local vl=""
 499
 500         case $TAG in
 501                 "TYPE") vl=$(ts_fstype_by_devname $DEV);;
 502                 "LABEL") vl=$(ts_label_by_devname $DEV);;
 503                 "UUID") vl=$(ts_uuid_by_devname $DEV);;
 504                 *) return 1;;
 505         esac
 506
 507         if [ "$vl" == "$VAL" ]; then
 508                 return 0
 509         fi
 510         return 1
 511 }
 512
 513 function ts_device_has_uuid {
 514         ts_uuid_by_devname "$1" | egrep -q '^[0-9a-z]{8}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12}$'
 515         return $?
 516 }
 517
 518 function ts_mount {
 519         local out
 520         local result
 521         local msg
 522         local fs
 523         local fs_exp=$1
 524         shift
 525
 526         out=$($TS_CMD_MOUNT "$@" 2>&1)
 527         result=$?
 528         echo -n "$out" >> $TS_OUTPUT
 529
 530         if [ $result != 0 ] \
 531                 && msg=$(echo "$out" | grep -m1 "unknown filesystem type")
 532         then
 533                 # skip only if reported fs correctly and if it's not available
 534                 fs=$(echo "$msg" | sed -n "s/.*type '\(.*\)'$/\1/p")
 535                 [ "$fs" = "fs_exp" ] \
 536                  && grep -qe "[[:space:]]${fs}$" /proc/filesystems &>/dev/null \
 537                  || ts_skip "$msg"
 538         fi
 539         return $result
 540 }
 541
 542 function ts_is_mounted {
 543         local DEV=$(ts_canonicalize "$1")
 544
 545         grep -q $DEV /proc/mounts && return 0
 546
 547         if [ "${DEV#/dev/loop/}" != "$DEV" ]; then
 548                 return grep -q "/dev/loop${DEV#/dev/loop/}" /proc/mounts
 549         fi
 550         return 1
 551 }
 552
 553 function ts_fstab_open {
 554         echo "# <!-- util-linux test entry" >> /etc/fstab
 555 }
 556
 557 function ts_fstab_close {
 558         echo "# -->" >> /etc/fstab
 559 }
 560
 561 function ts_fstab_addline {
 562         local SPEC="$1"
 563         local MNT=${2:-"$TS_MOUNTPOINT"}
 564         local FS=${3:-"auto"}
 565         local OPT=${4:-"defaults"}
 566
 567         echo "$SPEC   $MNT   $FS   $OPT   0   0" >> /etc/fstab
 568 }
 569
 570 function ts_fstab_add {
 571         ts_fstab_open
 572         ts_fstab_addline $*
 573         ts_fstab_close
 574 }
 575
 576 function ts_fstab_clean {
 577         sed --in-place "
 578 /# <!-- util-linux/!b
 579 :a
 580 /# -->/!{
 581   N
 582   ba
 583 }
 584 s/# <!-- util-linux.*-->//;
 585 /^$/d" /etc/fstab
 586 }
 587
 588 function ts_fdisk_clean {
 589         local DEVNAME=$1
 590
 591         # remove non comparable parts of fdisk output
 592         if [ x"${DEVNAME}" != x"" ]; then
 593                sed -i -e "s:${DEVNAME}:<removed>:g" $TS_OUTPUT
 594         fi
 595
 596         sed -i -e 's/Disk identifier:.*/Disk identifier: <removed>/g' \
 597                -e 's/Created a new.*/Created a new <removed>./g' \
 598                -e 's/^Device[[:blank:]]*Start/Device             Start/g' \
 599                -e 's/^Device[[:blank:]]*Boot/Device     Boot/g' \
 600                -e 's/^Device[[:blank:]]*Flag/Device     Flag/g' \
 601                -e 's/Welcome to fdisk.*/Welcome to fdisk <removed>./g' \
 602                $TS_OUTPUT
 603 }
 604
 605 function ts_scsi_debug_init {
 606         local devname
 607         TS_DEVICE="none"
 608
 609         # dry run is not really reliable, real modprobe may still fail
 610         modprobe --dry-run --quiet scsi_debug &>/dev/null \
 611                 || ts_skip "missing scsi_debug module (dry-run)"
 612
 613         # skip if still in use or removal of modules not supported at all
 614         modprobe -r scsi_debug &>/dev/null \
 615                 || ts_skip "cannot remove scsi_debug module (rmmod)"
 616
 617         modprobe -b scsi_debug "$@" &>/dev/null \
 618                 || ts_skip "cannot load scsi_debug module (modprobe)"
 619
 620         # it might be still not loaded, modprobe.conf or whatever
 621         lsmod | grep -q "^scsi_debug " \
 622                 || ts_skip "scsi_debug module not loaded (lsmod)"
 623
 624         sleep 1
 625         udevadm settle
 626
 627         devname=$(grep --with-filename scsi_debug /sys/block/*/device/model | awk -F '/' '{print $4}')
 628         [ "x${devname}" == "x" ] && ts_die "cannot find scsi_debug device"
 629
 630         TS_DEVICE="/dev/${devname}"
 631 }
 632
 633 function ts_resolve_host {
 634         local host="$1"
 635         local tmp
 636
 637         # currently we just resolve default records (might be "A", ipv4 only)
 638         if type "dig" >/dev/null 2>&1; then
 639                 tmp=$(dig "$host" +short 2>/dev/null) || return 1
 640         elif type "nslookup" >/dev/null 2>&1; then
 641                 tmp=$(nslookup "$host" 2>/dev/null) || return 1
 642                 tmp=$(echo "$tmp"| grep -A1 "^Name:"| grep "^Address:"| cut -d" " -f2)
 643         elif type "host" >/dev/null 2>&1; then
 644                 tmp=$(host "$host" 2>/dev/null) || return 1
 645                 tmp=$(echo "$tmp" | grep " has address " | cut -d " " -f4)
 646         elif type "getent" >/dev/null 2>&1; then
 647                 tmp=$(getent ahosts "$host" 2>/dev/null) || return 1
 648                 tmp=$(echo "$tmp" | cut -d " " -f 1 | sort -u)
 649         fi
 650
 651         # we return 1 if tmp is empty
 652         test -n "$tmp" || return 1
 653         echo "$tmp" | sort -R | head -n 1
 654 }
 655
 656 # listen to unix socket (background socat)
 657 function ts_init_socket_to_file {
 658         local socket=$1
 659         local outfile=$2
 660         local pid="0"
 661
 662         ts_check_prog "socat"
 663         rm -f "$socket" "$outfile"
 664
 665         socat -u UNIX-LISTEN:$socket,fork,max-children=1,backlog=128 \
 666                 STDOUT > "$outfile" &
 667         pid=$!
 668
 669         # check for running background process
 670         if [ "$pid" -le "0" ] || ! kill -s 0 "$pid"; then
 671                 ts_skip "unable to run socat"
 672         fi
 673         # wait for the socket listener
 674         if ! socat -u /dev/null UNIX-CONNECT:$socket,retry=30,interval=0.1; then
 675                 kill -9 "$pid"
 676                 ts_skip "timeout waiting for socket"
 677         fi
 678         # check socket again
 679         if ! socat -u /dev/null UNIX-CONNECT:$socket; then
 680                 kill -9 "$pid"
 681                 ts_skip "socket stopped listening"
 682         fi
 683 }