tests/init.sh

   1 # source this file; set up for tests
   2
   3 # Copyright (C) 2009-2011 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: $@"; Exit 99; }
  95
  96 # Sanitize this shell to POSIX mode, if possible.
  97 DUALCASE=1; export DUALCASE
  98 if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
  99   emulate sh
 100   NULLCMD=:
 101   alias -g '${1+"$@"}'='"$@"'
 102   setopt NO_GLOB_SUBST
 103 else
 104   case `(set -o) 2>/dev/null` in
 105     *posix*) set -o posix ;;
 106   esac
 107 fi
 108
 109 # We require $(...) support unconditionally.
 110 # We require a few additional shell features only when $EXEEXT is nonempty,
 111 # in order to support automatic $EXEEXT emulation:
 112 # - hyphen-containing alias names
 113 # - we prefer to use ${var#...} substitution, rather than having
 114 #   to work around lack of support for that feature.
 115 # The following code attempts to find a shell with support for these features.
 116 # If the current shell passes the test, we're done.  Otherwise, test other
 117 # shells until we find one that passes.  If one is found, re-exec it.
 118 # If no acceptable shell is found, skip the current test.
 119 #
 120 # The "...set -x; P=1 true 2>err..." test is to disqualify any shell that
 121 # emits "P=1" into err, as /bin/sh from SunOS 5.11 and OpenBSD 4.7 do.
 122 #
 123 # Use "9" to indicate success (rather than 0), in case some shell acts
 124 # like Solaris 10's /bin/sh but exits successfully instead of with status 2.
 125
 126 # Eval this code in a subshell to determine a shell's suitability.
 127 # 10 - passes all tests; ok to use
 128 #  9 - ok, but enabling "set -x" corrupts app stderr; prefer higher score
 129 #  ? - not ok
 130 gl_shell_test_script_='
 131 test $(echo y) = y || exit 1
 132 score_=10
 133 if test "$VERBOSE" = yes; then
 134   test -n "$( (exec 3>&1; set -x; P=1 true 2>&3) 2> /dev/null)" && score_=9
 135 fi
 136 test -z "$EXEEXT" && exit $score_
 137 shopt -s expand_aliases
 138 alias a-b="echo zoo"
 139 v=abx
 140      test ${v%x} = ab \
 141   && test ${v#a} = bx \
 142   && test $(a-b) = zoo \
 143   && exit $score_
 144 '
 145
 146 if test "x$1" = "x--no-reexec"; then
 147   shift
 148 else
 149   # Assume a working shell.  Export to subshells (setup_ needs this).
 150   gl_set_x_corrupts_stderr_=false
 151   export gl_set_x_corrupts_stderr_
 152
 153   # Record the first marginally acceptable shell.
 154   marginal_=
 155
 156   # Search for a shell that meets our requirements.
 157   for re_shell_ in __current__ "${CONFIG_SHELL:-no_shell}" \
 158       /bin/sh bash dash zsh pdksh fail
 159   do
 160     test "$re_shell_" = no_shell && continue
 161
 162     # If we've made it all the way to the sentinel, "fail" without
 163     # finding even a marginal shell, skip this test.
 164     if test "$re_shell_" = fail; then
 165       test -z "$marginal_" && skip_ failed to find an adequate shell
 166       re_shell_=$marginal_
 167       break
 168     fi
 169
 170     # When testing the current shell, simply "eval" the test code.
 171     # Otherwise, run it via $re_shell_ -c ...
 172     if test "$re_shell_" = __current__; then
 173       # 'eval'ing this code makes Solaris 10's /bin/sh exit with
 174       # $? set to 2.  It does not evaluate any of the code after the
 175       # "unexpected" first `('.  Thus, we must run it in a subshell.
 176       ( eval "$gl_shell_test_script_" ) > /dev/null 2>&1
 177     else
 178       "$re_shell_" -c "$gl_shell_test_script_" 2>/dev/null
 179     fi
 180
 181     st_=$?
 182
 183     # $re_shell_ works just fine.  Use it.
 184     if test $st_ = 10; then
 185       gl_set_x_corrupts_stderr_=false
 186       break
 187     fi
 188
 189     # If this is our first marginally acceptable shell, remember it.
 190     if test "$st_:$marginal_" = 9: ; then
 191       marginal_="$re_shell_"
 192       gl_set_x_corrupts_stderr_=true
 193     fi
 194   done
 195
 196   if test "$re_shell_" != __current__; then
 197     # Found a usable shell.  Preserve -v and -x.
 198     case $- in
 199       *v*x* | *x*v*) opts_=-vx ;;
 200       *v*) opts_=-v ;;
 201       *x*) opts_=-x ;;
 202       *) opts_= ;;
 203     esac
 204     exec "$re_shell_" $opts_ "$0" --no-reexec "$@"
 205     echo "$ME_: exec failed" 1>&2
 206     exit 127
 207   fi
 208 fi
 209
 210 test -n "$EXEEXT" && shopt -s expand_aliases
 211
 212 # Enable glibc's malloc-perturbing option.
 213 # This is useful for exposing code that depends on the fact that
 214 # malloc-related functions often return memory that is mostly zeroed.
 215 # If you have the time and cycles, use valgrind to do an even better job.
 216 : ${MALLOC_PERTURB_=87}
 217 export MALLOC_PERTURB_
 218
 219 # This is a stub function that is run upon trap (upon regular exit and
 220 # interrupt).  Override it with a per-test function, e.g., to unmount
 221 # a partition, or to undo any other global state changes.
 222 cleanup_ () { :; }
 223
 224 if ( diff -u "$0" "$0" < /dev/null ) > /dev/null 2>&1; then
 225   compare () { diff -u "$@"; }
 226 elif ( cmp --version < /dev/null 2>&1 | grep GNU ) > /dev/null 2>&1; then
 227   compare () { cmp -s "$@"; }
 228 else
 229   compare () { cmp "$@"; }
 230 fi
 231
 232 # An arbitrary prefix to help distinguish test directories.
 233 testdir_prefix_ () { printf gt; }
 234
 235 # Run the user-overridable cleanup_ function, remove the temporary
 236 # directory and exit with the incoming value of $?.
 237 remove_tmp_ ()
 238 {
 239   __st=$?
 240   cleanup_
 241   # cd out of the directory we're about to remove
 242   cd "$initial_cwd_" || cd / || cd /tmp
 243   chmod -R u+rwx "$test_dir_"
 244   # If removal fails and exit status was to be 0, then change it to 1.
 245   rm -rf "$test_dir_" || { test $__st = 0 && __st=1; }
 246   exit $__st
 247 }
 248
 249 # Given a directory name, DIR, if every entry in it that matches *.exe
 250 # contains only the specified bytes (see the case stmt below), then print
 251 # a space-separated list of those names and return 0.  Otherwise, don't
 252 # print anything and return 1.  Naming constraints apply also to DIR.
 253 find_exe_basenames_ ()
 254 {
 255   feb_dir_=$1
 256   feb_fail_=0
 257   feb_result_=
 258   feb_sp_=
 259   for feb_file_ in $feb_dir_/*.exe; do
 260     # If there was no *.exe file, or there existed a file named "*.exe" that
 261     # was deleted between the above glob expansion and the existence test
 262     # below, just skip it.
 263     test "x$feb_file_" = "x$feb_dir_/*.exe" && test ! -f "$feb_file_" \
 264       && continue
 265     # Exempt [.exe, since we can't create a function by that name, yet
 266     # we can't invoke [ by PATH search anyways due to shell builtins.
 267     test "x$feb_file_" = "x$feb_dir_/[.exe" && continue
 268     case $feb_file_ in
 269       *[!-a-zA-Z/0-9_.+]*) feb_fail_=1; break;;
 270       *) # Remove leading file name components as well as the .exe suffix.
 271          feb_file_=${feb_file_##*/}
 272          feb_file_=${feb_file_%.exe}
 273          feb_result_="$feb_result_$feb_sp_$feb_file_";;
 274     esac
 275     feb_sp_=' '
 276   done
 277   test $feb_fail_ = 0 && printf %s "$feb_result_"
 278   return $feb_fail_
 279 }
 280
 281 # Consider the files in directory, $1.
 282 # For each file name of the form PROG.exe, create an alias named
 283 # PROG that simply invokes PROG.exe, then return 0.  If any selected
 284 # file name or the directory name, $1, contains an unexpected character,
 285 # define no alias and return 1.
 286 create_exe_shims_ ()
 287 {
 288   case $EXEEXT in
 289     '') return 0 ;;
 290     .exe) ;;
 291     *) echo "$0: unexpected \$EXEEXT value: $EXEEXT" 1>&2; return 1 ;;
 292   esac
 293
 294   base_names_=`find_exe_basenames_ $1` \
 295     || { echo "$0 (exe_shim): skipping directory: $1" 1>&2; return 0; }
 296
 297   if test -n "$base_names_"; then
 298     for base_ in $base_names_; do
 299       alias "$base_"="$base_$EXEEXT"
 300     done
 301   fi
 302
 303   return 0
 304 }
 305
 306 # Use this function to prepend to PATH an absolute name for each
 307 # specified, possibly-$initial_cwd_-relative, directory.
 308 path_prepend_ ()
 309 {
 310   while test $# != 0; do
 311     path_dir_=$1
 312     case $path_dir_ in
 313       '') fail_ "invalid path dir: '$1'";;
 314       /*) abs_path_dir_=$path_dir_;;
 315       *) abs_path_dir_=`cd "$initial_cwd_/$path_dir_" && echo "$PWD"` \
 316            || fail_ "invalid path dir: $path_dir_";;
 317     esac
 318     case $abs_path_dir_ in
 319       *:*) fail_ "invalid path dir: '$abs_path_dir_'";;
 320     esac
 321     PATH="$abs_path_dir_:$PATH"
 322
 323     # Create an alias, FOO, for each FOO.exe in this directory.
 324     create_exe_shims_ "$abs_path_dir_" \
 325       || fail_ "something failed (above): $abs_path_dir_"
 326     shift
 327   done
 328   export PATH
 329 }
 330
 331 setup_ ()
 332 {
 333   if test "$VERBOSE" = yes; then
 334     # Test whether set -x may cause the selected shell to corrupt an
 335     # application's stderr.  Many do, including zsh-4.3.10 and the /bin/sh
 336     # from SunOS 5.11, OpenBSD 4.7 and Irix 5.x and 6.5.
 337     # If enabling verbose output this way would cause trouble, simply
 338     # issue a warning and refrain.
 339     if $gl_set_x_corrupts_stderr_; then
 340       warn_ "using SHELL=$SHELL with 'set -x' corrupts stderr"
 341     else
 342       set -x
 343     fi
 344   fi
 345
 346   initial_cwd_=$PWD
 347   fail=0
 348
 349   pfx_=`testdir_prefix_`
 350   test_dir_=`mktempd_ "$initial_cwd_" "$pfx_-$ME_.XXXX"` \
 351     || fail_ "failed to create temporary directory in $initial_cwd_"
 352   cd "$test_dir_"
 353
 354   # As autoconf-generated configure scripts do, ensure that IFS
 355   # is defined initially, so that saving and restoring $IFS works.
 356   gl_init_sh_nl_='
 357 '
 358   IFS=" ""      $gl_init_sh_nl_"
 359
 360   # This trap statement, along with a trap on 0 below, ensure that the
 361   # temporary directory, $test_dir_, is removed upon exit as well as
 362   # upon receipt of any of the listed signals.
 363   for sig_ in 1 2 3 13 15; do
 364     eval "trap 'Exit $(expr $sig_ + 128)' $sig_"
 365   done
 366 }
 367
 368 # Create a temporary directory, much like mktemp -d does.
 369 # Written by Jim Meyering.
 370 #
 371 # Usage: mktempd_ /tmp phoey.XXXXXXXXXX
 372 #
 373 # First, try to use the mktemp program.
 374 # Failing that, we'll roll our own mktemp-like function:
 375 #  - try to get random bytes from /dev/urandom
 376 #  - failing that, generate output from a combination of quickly-varying
 377 #      sources and gzip.  Ignore non-varying gzip header, and extract
 378 #      "random" bits from there.
 379 #  - given those bits, map to file-name bytes using tr, and try to create
 380 #      the desired directory.
 381 #  - make only $MAX_TRIES_ attempts
 382
 383 # Helper function.  Print $N pseudo-random bytes from a-zA-Z0-9.
 384 rand_bytes_ ()
 385 {
 386   n_=$1
 387
 388   # Maybe try openssl rand -base64 $n_prime_|tr '+/=\012' abcd first?
 389   # But if they have openssl, they probably have mktemp, too.
 390
 391   chars_=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
 392   dev_rand_=/dev/urandom
 393   if test -r "$dev_rand_"; then
 394     # Note: 256-length($chars_) == 194; 3 copies of $chars_ is 186 + 8 = 194.
 395     dd ibs=$n_ count=1 if=$dev_rand_ 2>/dev/null \
 396       | LC_ALL=C tr -c $chars_ 01234567$chars_$chars_$chars_
 397     return
 398   fi
 399
 400   n_plus_50_=`expr $n_ + 50`
 401   cmds_='date; date +%N; free; who -a; w; ps auxww; ps ef; netstat -n'
 402   data_=` (eval "$cmds_") 2>&1 | gzip `
 403
 404   # Ensure that $data_ has length at least 50+$n_
 405   while :; do
 406     len_=`echo "$data_"|wc -c`
 407     test $n_plus_50_ -le $len_ && break;
 408     data_=` (echo "$data_"; eval "$cmds_") 2>&1 | gzip `
 409   done
 410
 411   echo "$data_" \
 412     | dd bs=1 skip=50 count=$n_ 2>/dev/null \
 413     | LC_ALL=C tr -c $chars_ 01234567$chars_$chars_$chars_
 414 }
 415
 416 mktempd_ ()
 417 {
 418   case $# in
 419   2);;
 420   *) fail_ "Usage: mktempd_ DIR TEMPLATE";;
 421   esac
 422
 423   destdir_=$1
 424   template_=$2
 425
 426   MAX_TRIES_=4
 427
 428   # Disallow any trailing slash on specified destdir:
 429   # it would subvert the post-mktemp "case"-based destdir test.
 430   case $destdir_ in
 431   /) ;;
 432   */) fail_ "invalid destination dir: remove trailing slash(es)";;
 433   esac
 434
 435   case $template_ in
 436   *XXXX) ;;
 437   *) fail_ \
 438        "invalid template: $template_ (must have a suffix of at least 4 X's)";;
 439   esac
 440
 441   # First, try to use mktemp.
 442   d=`unset TMPDIR; mktemp -d -t -p "$destdir_" "$template_" 2>/dev/null` \
 443     || fail=1
 444
 445   # The resulting name must be in the specified directory.
 446   case $d in "$destdir_"*);; *) fail=1;; esac
 447
 448   # It must have created the directory.
 449   test -d "$d" || fail=1
 450
 451   # It must have 0700 permissions.  Handle sticky "S" bits.
 452   perms=`ls -dgo "$d" 2>/dev/null|tr S -` || fail=1
 453   case $perms in drwx------*) ;; *) fail=1;; esac
 454
 455   test $fail = 0 && {
 456     echo "$d"
 457     return
 458   }
 459
 460   # If we reach this point, we'll have to create a directory manually.
 461
 462   # Get a copy of the template without its suffix of X's.
 463   base_template_=`echo "$template_"|sed 's/XX*$//'`
 464
 465   # Calculate how many X's we've just removed.
 466   template_length_=`echo "$template_" | wc -c`
 467   nx_=`echo "$base_template_" | wc -c`
 468   nx_=`expr $template_length_ - $nx_`
 469
 470   err_=
 471   i_=1
 472   while :; do
 473     X_=`rand_bytes_ $nx_`
 474     candidate_dir_="$destdir_/$base_template_$X_"
 475     err_=`mkdir -m 0700 "$candidate_dir_" 2>&1` \
 476       && { echo "$candidate_dir_"; return; }
 477     test $MAX_TRIES_ -le $i_ && break;
 478     i_=`expr $i_ + 1`
 479   done
 480   fail_ "$err_"
 481 }
 482
 483 # If you want to override the testdir_prefix_ function,
 484 # or to add more utility functions, use this file.
 485 test -f "$srcdir/init.cfg" \
 486   && . "$srcdir/init.cfg"
 487
 488 setup_ "$@"
 489 # This trap is here, rather than in the setup_ function, because some
 490 # shells run the exit trap at shell function exit, rather than script exit.
 491 trap remove_tmp_ 0