tests/init.sh

   1 # source this file; set up for tests
   2
   3 # Copyright (C) 2009-2016 Free Software Foundation, Inc.
   4
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 3 of the License, or
   8 # (at your option) any later version.
   9
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 # Using this file in a test
  19 # =========================
  20 #
  21 # The typical skeleton of a test looks like this:
  22 #
  23 #   #!/bin/sh
  24 #   . "${srcdir=.}/init.sh"; path_prepend_ .
  25 #   Execute some commands.
  26 #   Note that these commands are executed in a subdirectory, therefore you
  27 #   need to prepend "../" to relative filenames in the build directory.
  28 #   Note that the "path_prepend_ ." is useful only if the body of your
  29 #   test invokes programs residing in the initial directory.
  30 #   For example, if the programs you want to test are in src/, and this test
  31 #   script is named tests/test-1, then you would use "path_prepend_ ../src",
  32 #   or perhaps export PATH='$(abs_top_builddir)/src$(PATH_SEPARATOR)'"$$PATH"
  33 #   to all tests via automake's TESTS_ENVIRONMENT.
  34 #   Set the exit code 0 for success, 77 for skipped, or 1 or other for failure.
  35 #   Use the skip_ and fail_ functions to print a diagnostic and then exit
  36 #   with the corresponding exit code.
  37 #   Exit $?
  38
  39 # Executing a test that uses this file
  40 # ====================================
  41 #
  42 # Running a single test:
  43 #   $ make check TESTS=test-foo.sh
  44 #
  45 # Running a single test, with verbose output:
  46 #   $ make check TESTS=test-foo.sh VERBOSE=yes
  47 #
  48 # Running a single test, with single-stepping:
  49 #   1. Go into a sub-shell:
  50 #   $ bash
  51 #   2. Set relevant environment variables from TESTS_ENVIRONMENT in the
  52 #      Makefile:
  53 #   $ export srcdir=../../tests # this is an example
  54 #   3. Execute the commands from the test, copy&pasting them one by one:
  55 #   $ . "$srcdir/init.sh"; path_prepend_ .
  56 #   ...
  57 #   4. Finally
  58 #   $ exit
  59
  60 ME_=`expr "./$0" : '.*/\(.*\)$'`
  61
  62 # We use a trap below for cleanup.  This requires us to go through
  63 # hoops to get the right exit status transported through the handler.
  64 # So use 'Exit STATUS' instead of 'exit STATUS' inside of the tests.
  65 # Turn off errexit here so that we don't trip the bug with OSF1/Tru64
  66 # sh inside this function.
  67 Exit () { set +e; (exit $1); exit $1; }
  68
  69 # Print warnings (e.g., about skipped and failed tests) to this file number.
  70 # Override by defining to say, 9, in init.cfg, and putting say,
  71 #   export ...ENVVAR_SETTINGS...; $(SHELL) 9>&2
  72 # in the definition of TESTS_ENVIRONMENT in your tests/Makefile.am file.
  73 # This is useful when using automake's parallel tests mode, to print
  74 # the reason for skip/failure to console, rather than to the .log files.
  75 : ${stderr_fileno_=2}
  76
  77 # Note that correct expansion of "$*" depends on IFS starting with ' '.
  78 # Always write the full diagnostic to stderr.
  79 # When stderr_fileno_ is not 2, also emit the first line of the
  80 # diagnostic to that file descriptor.
  81 warn_ ()
  82 {
  83   # If IFS does not start with ' ', set it and emit the warning in a subshell.
  84   case $IFS in
  85     ' '*) printf '%s\n' "$*" >&2
  86           test $stderr_fileno_ = 2 \
  87             || { printf '%s\n' "$*" | sed 1q >&$stderr_fileno_ ; } ;;
  88     *) (IFS=' '; warn_ "$@");;
  89   esac
  90 }
  91 fail_ () { warn_ "$ME_: failed test: $@"; Exit 1; }
  92 skip_ () { warn_ "$ME_: skipped test: $@"; Exit 77; }
  93 fatal_ () { warn_ "$ME_: hard error: $@"; Exit 99; }
  94 framework_failure_ () { warn_ "$ME_: set-up failure: $@"; Exit 99; }
  95
  96 # This is used to simplify checking of the return value
  97 # which is useful when ensuring a command fails as desired.
  98 # I.e., just doing `command ... &&fail=1` will not catch
  99 # a segfault in command for example.  With this helper you
 100 # instead check an explicit exit code like
 101 #   returns_ 1 command ... || fail
 102 returns_ () {
 103   # Disable tracing so it doesn't interfere with stderr of the wrapped command
 104   { set +x; } 2>/dev/null
 105
 106   local exp_exit="$1"
 107   shift
 108   "$@"
 109   test $? -eq $exp_exit && ret_=0 || ret_=1
 110
 111   if test "$VERBOSE" = yes && test "$gl_set_x_corrupts_stderr_" = false; then
 112     set -x
 113   fi
 114   { return $ret_; } 2>/dev/null
 115 }
 116
 117 # Sanitize this shell to POSIX mode, if possible.
 118 DUALCASE=1; export DUALCASE
 119 if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
 120   emulate sh
 121   NULLCMD=:
 122   alias -g '${1+"$@"}'='"$@"'
 123   setopt NO_GLOB_SUBST
 124 else
 125   case `(set -o) 2>/dev/null` in
 126     *posix*) set -o posix ;;
 127   esac
 128 fi
 129
 130 # We require $(...) support unconditionally.
 131 # We require a few additional shell features only when $EXEEXT is nonempty,
 132 # in order to support automatic $EXEEXT emulation:
 133 # - hyphen-containing alias names
 134 # - we prefer to use ${var#...} substitution, rather than having
 135 #   to work around lack of support for that feature.
 136 # The following code attempts to find a shell with support for these features.
 137 # If the current shell passes the test, we're done.  Otherwise, test other
 138 # shells until we find one that passes.  If one is found, re-exec it.
 139 # If no acceptable shell is found, skip the current test.
 140 #
 141 # The "...set -x; P=1 true 2>err..." test is to disqualify any shell that
 142 # emits "P=1" into err, as /bin/sh from SunOS 5.11 and OpenBSD 4.7 do.
 143 #
 144 # Use "9" to indicate success (rather than 0), in case some shell acts
 145 # like Solaris 10's /bin/sh but exits successfully instead of with status 2.
 146
 147 # Eval this code in a subshell to determine a shell's suitability.
 148 # 10 - passes all tests; ok to use
 149 #  9 - ok, but enabling "set -x" corrupts app stderr; prefer higher score
 150 #  ? - not ok
 151 gl_shell_test_script_='
 152 test $(echo y) = y || exit 1
 153 f_local_() { local v=1; }; f_local_ || exit 1
 154 score_=10
 155 if test "$VERBOSE" = yes; then
 156   test -n "$( (exec 3>&1; set -x; P=1 true 2>&3) 2> /dev/null)" && score_=9
 157 fi
 158 test -z "$EXEEXT" && exit $score_
 159 shopt -s expand_aliases
 160 alias a-b="echo zoo"
 161 v=abx
 162      test ${v%x} = ab \
 163   && test ${v#a} = bx \
 164   && test $(a-b) = zoo \
 165   && exit $score_
 166 '
 167
 168 if test "x$1" = "x--no-reexec"; then
 169   shift
 170 else
 171   # Assume a working shell.  Export to subshells (setup_ needs this).
 172   gl_set_x_corrupts_stderr_=false
 173   export gl_set_x_corrupts_stderr_
 174
 175   # Record the first marginally acceptable shell.
 176   marginal_=
 177
 178   # Search for a shell that meets our requirements.
 179   for re_shell_ in __current__ "${CONFIG_SHELL:-no_shell}" \
 180       /bin/sh bash dash zsh pdksh fail
 181   do
 182     test "$re_shell_" = no_shell && continue
 183
 184     # If we've made it all the way to the sentinel, "fail" without
 185     # finding even a marginal shell, skip this test.
 186     if test "$re_shell_" = fail; then
 187       test -z "$marginal_" && skip_ failed to find an adequate shell
 188       re_shell_=$marginal_
 189       break
 190     fi
 191
 192     # When testing the current shell, simply "eval" the test code.
 193     # Otherwise, run it via $re_shell_ -c ...
 194     if test "$re_shell_" = __current__; then
 195       # 'eval'ing this code makes Solaris 10's /bin/sh exit with
 196       # $? set to 2.  It does not evaluate any of the code after the
 197       # "unexpected" first '('.  Thus, we must run it in a subshell.
 198       ( eval "$gl_shell_test_script_" ) > /dev/null 2>&1
 199     else
 200       "$re_shell_" -c "$gl_shell_test_script_" 2>/dev/null
 201     fi
 202
 203     st_=$?
 204
 205     # $re_shell_ works just fine.  Use it.
 206     if test $st_ = 10; then
 207       gl_set_x_corrupts_stderr_=false
 208       break
 209     fi
 210
 211     # If this is our first marginally acceptable shell, remember it.
 212     if test "$st_:$marginal_" = 9: ; then
 213       marginal_="$re_shell_"
 214       gl_set_x_corrupts_stderr_=true
 215     fi
 216   done
 217
 218   if test "$re_shell_" != __current__; then
 219     # Found a usable shell.  Preserve -v and -x.
 220     case $- in
 221       *v*x* | *x*v*) opts_=-vx ;;
 222       *v*) opts_=-v ;;
 223       *x*) opts_=-x ;;
 224       *) opts_= ;;
 225     esac
 226     re_shell=$re_shell_
 227     export re_shell
 228     exec "$re_shell_" $opts_ "$0" --no-reexec "$@"
 229     echo "$ME_: exec failed" 1>&2
 230     exit 127
 231   fi
 232 fi
 233
 234 # If this is bash, turn off all aliases.
 235 test -n "$BASH_VERSION" && unalias -a
 236
 237 # Note that when supporting $EXEEXT (transparently mapping from PROG_NAME to
 238 # PROG_NAME.exe), we want to support hyphen-containing names like test-acos.
 239 # That is part of the shell-selection test above.  Why use aliases rather
 240 # than functions?  Because support for hyphen-containing aliases is more
 241 # widespread than that for hyphen-containing function names.
 242 test -n "$EXEEXT" && shopt -s expand_aliases
 243
 244 # Enable glibc's malloc-perturbing option.
 245 # This is useful for exposing code that depends on the fact that
 246 # malloc-related functions often return memory that is mostly zeroed.
 247 # If you have the time and cycles, use valgrind to do an even better job.
 248 : ${MALLOC_PERTURB_=87}
 249 export MALLOC_PERTURB_
 250
 251 # This is a stub function that is run upon trap (upon regular exit and
 252 # interrupt).  Override it with a per-test function, e.g., to unmount
 253 # a partition, or to undo any other global state changes.
 254 cleanup_ () { :; }
 255
 256 # Emit a header similar to that from diff -u;  Print the simulated "diff"
 257 # command so that the order of arguments is clear.  Don't bother with @@ lines.
 258 emit_diff_u_header_ ()
 259 {
 260   printf '%s\n' "diff -u $*" \
 261     "--- $1     1970-01-01" \
 262     "+++ $2     1970-01-01"
 263 }
 264
 265 # Arrange not to let diff or cmp operate on /dev/null,
 266 # since on some systems (at least OSF/1 5.1), that doesn't work.
 267 # When there are not two arguments, or no argument is /dev/null, return 2.
 268 # When one argument is /dev/null and the other is not empty,
 269 # cat the nonempty file to stderr and return 1.
 270 # Otherwise, return 0.
 271 compare_dev_null_ ()
 272 {
 273   test $# = 2 || return 2
 274
 275   if test "x$1" = x/dev/null; then
 276     test -s "$2" || return 0
 277     emit_diff_u_header_ "$@"; sed 's/^/+/' "$2"
 278     return 1
 279   fi
 280
 281   if test "x$2" = x/dev/null; then
 282     test -s "$1" || return 0
 283     emit_diff_u_header_ "$@"; sed 's/^/-/' "$1"
 284     return 1
 285   fi
 286
 287   return 2
 288 }
 289
 290 if diff_out_=`exec 2>/dev/null; diff -u "$0" "$0" < /dev/null` \
 291    && diff -u Makefile "$0" 2>/dev/null | grep '^[+]#!' >/dev/null; then
 292   # diff accepts the -u option and does not (like AIX 7 'diff') produce an
 293   # extra space on column 1 of every content line.
 294   if test -z "$diff_out_"; then
 295     compare_ () { diff -u "$@"; }
 296   else
 297     compare_ ()
 298     {
 299       if diff -u "$@" > diff.out; then
 300         # No differences were found, but Solaris 'diff' produces output
 301         # "No differences encountered". Hide this output.
 302         rm -f diff.out
 303         true
 304       else
 305         cat diff.out
 306         rm -f diff.out
 307         false
 308       fi
 309     }
 310   fi
 311 elif diff_out_=`exec 2>/dev/null; diff -c "$0" "$0" < /dev/null`; then
 312   if test -z "$diff_out_"; then
 313     compare_ () { diff -c "$@"; }
 314   else
 315     compare_ ()
 316     {
 317       if diff -c "$@" > diff.out; then
 318         # No differences were found, but AIX and HP-UX 'diff' produce output
 319         # "No differences encountered" or "There are no differences between the
 320         # files.". Hide this output.
 321         rm -f diff.out
 322         true
 323       else
 324         cat diff.out
 325         rm -f diff.out
 326         false
 327       fi
 328     }
 329   fi
 330 elif cmp -s /dev/null /dev/null 2>/dev/null; then
 331   compare_ () { cmp -s "$@"; }
 332 else
 333   compare_ () { cmp "$@"; }
 334 fi
 335
 336 # Usage: compare EXPECTED ACTUAL
 337 #
 338 # Given compare_dev_null_'s preprocessing, defer to compare_ if 2 or more.
 339 # Otherwise, propagate $? to caller: any diffs have already been printed.
 340 compare ()
 341 {
 342   # This looks like it can be factored to use a simple "case $?"
 343   # after unchecked compare_dev_null_ invocation, but that would
 344   # fail in a "set -e" environment.
 345   if compare_dev_null_ "$@"; then
 346     return 0
 347   else
 348     case $? in
 349       1) return 1;;
 350       *) compare_ "$@";;
 351     esac
 352   fi
 353 }
 354
 355 # An arbitrary prefix to help distinguish test directories.
 356 testdir_prefix_ () { printf gt; }
 357
 358 # Run the user-overridable cleanup_ function, remove the temporary
 359 # directory and exit with the incoming value of $?.
 360 remove_tmp_ ()
 361 {
 362   __st=$?
 363   cleanup_
 364   # cd out of the directory we're about to remove
 365   cd "$initial_cwd_" || cd / || cd /tmp
 366   chmod -R u+rwx "$test_dir_"
 367   # If removal fails and exit status was to be 0, then change it to 1.
 368   rm -rf "$test_dir_" || { test $__st = 0 && __st=1; }
 369   exit $__st
 370 }
 371
 372 # Given a directory name, DIR, if every entry in it that matches *.exe
 373 # contains only the specified bytes (see the case stmt below), then print
 374 # a space-separated list of those names and return 0.  Otherwise, don't
 375 # print anything and return 1.  Naming constraints apply also to DIR.
 376 find_exe_basenames_ ()
 377 {
 378   feb_dir_=$1
 379   feb_fail_=0
 380   feb_result_=
 381   feb_sp_=
 382   for feb_file_ in $feb_dir_/*.exe; do
 383     # If there was no *.exe file, or there existed a file named "*.exe" that
 384     # was deleted between the above glob expansion and the existence test
 385     # below, just skip it.
 386     test "x$feb_file_" = "x$feb_dir_/*.exe" && test ! -f "$feb_file_" \
 387       && continue
 388     # Exempt [.exe, since we can't create a function by that name, yet
 389     # we can't invoke [ by PATH search anyways due to shell builtins.
 390     test "x$feb_file_" = "x$feb_dir_/[.exe" && continue
 391     case $feb_file_ in
 392       *[!-a-zA-Z/0-9_.+]*) feb_fail_=1; break;;
 393       *) # Remove leading file name components as well as the .exe suffix.
 394          feb_file_=${feb_file_##*/}
 395          feb_file_=${feb_file_%.exe}
 396          feb_result_="$feb_result_$feb_sp_$feb_file_";;
 397     esac
 398     feb_sp_=' '
 399   done
 400   test $feb_fail_ = 0 && printf %s "$feb_result_"
 401   return $feb_fail_
 402 }
 403
 404 # Consider the files in directory, $1.
 405 # For each file name of the form PROG.exe, create an alias named
 406 # PROG that simply invokes PROG.exe, then return 0.  If any selected
 407 # file name or the directory name, $1, contains an unexpected character,
 408 # define no alias and return 1.
 409 create_exe_shims_ ()
 410 {
 411   case $EXEEXT in
 412     '') return 0 ;;
 413     .exe) ;;
 414     *) echo "$0: unexpected \$EXEEXT value: $EXEEXT" 1>&2; return 1 ;;
 415   esac
 416
 417   base_names_=`find_exe_basenames_ $1` \
 418     || { echo "$0 (exe_shim): skipping directory: $1" 1>&2; return 0; }
 419
 420   if test -n "$base_names_"; then
 421     for base_ in $base_names_; do
 422       alias "$base_"="$base_$EXEEXT"
 423     done
 424   fi
 425
 426   return 0
 427 }
 428
 429 # Use this function to prepend to PATH an absolute name for each
 430 # specified, possibly-$initial_cwd_-relative, directory.
 431 path_prepend_ ()
 432 {
 433   while test $# != 0; do
 434     path_dir_=$1
 435     case $path_dir_ in
 436       '') fail_ "invalid path dir: '$1'";;
 437       /*) abs_path_dir_=$path_dir_;;
 438       *) abs_path_dir_=$initial_cwd_/$path_dir_;;
 439     esac
 440     case $abs_path_dir_ in
 441       *:*) fail_ "invalid path dir: '$abs_path_dir_'";;
 442     esac
 443     PATH="$abs_path_dir_:$PATH"
 444
 445     # Create an alias, FOO, for each FOO.exe in this directory.
 446     create_exe_shims_ "$abs_path_dir_" \
 447       || fail_ "something failed (above): $abs_path_dir_"
 448     shift
 449   done
 450   export PATH
 451 }
 452
 453 setup_ ()
 454 {
 455   if test "$VERBOSE" = yes; then
 456     # Test whether set -x may cause the selected shell to corrupt an
 457     # application's stderr.  Many do, including zsh-4.3.10 and the /bin/sh
 458     # from SunOS 5.11, OpenBSD 4.7 and Irix 5.x and 6.5.
 459     # If enabling verbose output this way would cause trouble, simply
 460     # issue a warning and refrain.
 461     if $gl_set_x_corrupts_stderr_; then
 462       warn_ "using SHELL=$SHELL with 'set -x' corrupts stderr"
 463     else
 464       set -x
 465     fi
 466   fi
 467
 468   initial_cwd_=$PWD
 469   fail=0
 470
 471   pfx_=`testdir_prefix_`
 472   test_dir_=`mktempd_ "$initial_cwd_" "$pfx_-$ME_.XXXX"` \
 473     || fail_ "failed to create temporary directory in $initial_cwd_"
 474   cd "$test_dir_" || fail_ "failed to cd to temporary directory"
 475
 476   # As autoconf-generated configure scripts do, ensure that IFS
 477   # is defined initially, so that saving and restoring $IFS works.
 478   gl_init_sh_nl_='
 479 '
 480   IFS=" ""      $gl_init_sh_nl_"
 481
 482   # This trap statement, along with a trap on 0 below, ensure that the
 483   # temporary directory, $test_dir_, is removed upon exit as well as
 484   # upon receipt of any of the listed signals.
 485   for sig_ in 1 2 3 13 15; do
 486     eval "trap 'Exit $(expr $sig_ + 128)' $sig_"
 487   done
 488 }
 489
 490 # Create a temporary directory, much like mktemp -d does.
 491 # Written by Jim Meyering.
 492 #
 493 # Usage: mktempd_ /tmp phoey.XXXXXXXXXX
 494 #
 495 # First, try to use the mktemp program.
 496 # Failing that, we'll roll our own mktemp-like function:
 497 #  - try to get random bytes from /dev/urandom
 498 #  - failing that, generate output from a combination of quickly-varying
 499 #      sources and gzip.  Ignore non-varying gzip header, and extract
 500 #      "random" bits from there.
 501 #  - given those bits, map to file-name bytes using tr, and try to create
 502 #      the desired directory.
 503 #  - make only $MAX_TRIES_ attempts
 504
 505 # Helper function.  Print $N pseudo-random bytes from a-zA-Z0-9.
 506 rand_bytes_ ()
 507 {
 508   n_=$1
 509
 510   # Maybe try openssl rand -base64 $n_prime_|tr '+/=\012' abcd first?
 511   # But if they have openssl, they probably have mktemp, too.
 512
 513   chars_=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
 514   dev_rand_=/dev/urandom
 515   if test -r "$dev_rand_"; then
 516     # Note: 256-length($chars_) == 194; 3 copies of $chars_ is 186 + 8 = 194.
 517     dd ibs=$n_ count=1 if=$dev_rand_ 2>/dev/null \
 518       | LC_ALL=C tr -c $chars_ 01234567$chars_$chars_$chars_
 519     return
 520   fi
 521
 522   n_plus_50_=`expr $n_ + 50`
 523   cmds_='date; date +%N; free; who -a; w; ps auxww; ps ef; netstat -n'
 524   data_=` (eval "$cmds_") 2>&1 | gzip `
 525
 526   # Ensure that $data_ has length at least 50+$n_
 527   while :; do
 528     len_=`echo "$data_"|wc -c`
 529     test $n_plus_50_ -le $len_ && break;
 530     data_=` (echo "$data_"; eval "$cmds_") 2>&1 | gzip `
 531   done
 532
 533   echo "$data_" \
 534     | dd bs=1 skip=50 count=$n_ 2>/dev/null \
 535     | LC_ALL=C tr -c $chars_ 01234567$chars_$chars_$chars_
 536 }
 537
 538 mktempd_ ()
 539 {
 540   case $# in
 541   2);;
 542   *) fail_ "Usage: mktempd_ DIR TEMPLATE";;
 543   esac
 544
 545   destdir_=$1
 546   template_=$2
 547
 548   MAX_TRIES_=4
 549
 550   # Disallow any trailing slash on specified destdir:
 551   # it would subvert the post-mktemp "case"-based destdir test.
 552   case $destdir_ in
 553   /) ;;
 554   */) fail_ "invalid destination dir: remove trailing slash(es)";;
 555   esac
 556
 557   case $template_ in
 558   *XXXX) ;;
 559   *) fail_ \
 560        "invalid template: $template_ (must have a suffix of at least 4 X's)";;
 561   esac
 562
 563   # First, try to use mktemp.
 564   d=`unset TMPDIR; { mktemp -d -t -p "$destdir_" "$template_"; } 2>/dev/null` \
 565     || fail=1
 566
 567   # The resulting name must be in the specified directory.
 568   case $d in "$destdir_"*);; *) fail=1;; esac
 569
 570   # It must have created the directory.
 571   test -d "$d" || fail=1
 572
 573   # It must have 0700 permissions.  Handle sticky "S" bits.
 574   perms=`ls -dgo "$d" 2>/dev/null|tr S -` || fail=1
 575   case $perms in drwx------*) ;; *) fail=1;; esac
 576
 577   test $fail = 0 && {
 578     echo "$d"
 579     return
 580   }
 581
 582   # If we reach this point, we'll have to create a directory manually.
 583
 584   # Get a copy of the template without its suffix of X's.
 585   base_template_=`echo "$template_"|sed 's/XX*$//'`
 586
 587   # Calculate how many X's we've just removed.
 588   template_length_=`echo "$template_" | wc -c`
 589   nx_=`echo "$base_template_" | wc -c`
 590   nx_=`expr $template_length_ - $nx_`
 591
 592   err_=
 593   i_=1
 594   while :; do
 595     X_=`rand_bytes_ $nx_`
 596     candidate_dir_="$destdir_/$base_template_$X_"
 597     err_=`mkdir -m 0700 "$candidate_dir_" 2>&1` \
 598       && { echo "$candidate_dir_"; return; }
 599     test $MAX_TRIES_ -le $i_ && break;
 600     i_=`expr $i_ + 1`
 601   done
 602   fail_ "$err_"
 603 }
 604
 605 # If you want to override the testdir_prefix_ function,
 606 # or to add more utility functions, use this file.
 607 test -f "$srcdir/init.cfg" \
 608   && . "$srcdir/init.cfg"
 609
 610 setup_ "$@"
 611 # This trap is here, rather than in the setup_ function, because some
 612 # shells run the exit trap at shell function exit, rather than script exit.
 613 trap remove_tmp_ 0