--- /dev/null
+# source this file; set up for tests
+
+# Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Using this file in a test
+# =========================
+#
+# The typical skeleton of a test looks like this:
+#
+# #!/bin/sh
+# : ${srcdir=.}
+# . "$srcdir/init.sh"; path_prepend_ .
+# Execute some commands.
+# Note that these commands are executed in a subdirectory, therefore you
+# need to prepend "../" to relative filenames in the build directory.
+# Set the exit code 0 for success, 77 for skipped, or 1 or other for failure.
+# Use the skip_ and fail_ functions to print a diagnostic and then exit
+# with the corresponding exit code.
+# Exit $?
+
+# Executing a test that uses this file
+# ====================================
+#
+# Running a single test:
+# $ make check TESTS=test-foo.sh
+#
+# Running a single test, with verbose output:
+# $ make check TESTS=test-foo.sh VERBOSE=yes
+#
+# Running a single test, with single-stepping:
+# 1. Go into a sub-shell:
+# $ bash
+# 2. Set relevant environment variables from TESTS_ENVIRONMENT in the
+# Makefile:
+# $ export srcdir=../../tests # this is an example
+# 3. Execute the commands from the test, copy&pasting them one by one:
+# $ . "$srcdir/init.sh"; path_prepend_ .
+# ...
+# 4. Finally
+# $ exit
+
+# We use a trap below for cleanup. This requires us to go through
+# hoops to get the right exit status transported through the handler.
+# So use `Exit STATUS' instead of `exit STATUS' inside of the tests.
+# Turn off errexit here so that we don't trip the bug with OSF1/Tru64
+# sh inside this function.
+Exit () { set +e; (exit $1); exit $1; }
+
+fail_() { echo "$ME_: failed test: $@" 1>&2; Exit 1; }
+skip_() { echo "$ME_: skipped test: $@" 1>&2; Exit 77; }
+
+# This is a stub function that is run upon trap (upon regular exit and
+# interrupt). Override it with a per-test function, e.g., to unmount
+# a partition, or to undo any other global state changes.
+cleanup_() { :; }
+
+if ( diff --version < /dev/null 2>&1 | grep GNU ) 2>&1 > /dev/null; then
+ compare() { diff -u "$@"; }
+elif ( cmp --version < /dev/null 2>&1 | grep GNU ) 2>&1 > /dev/null; then
+ compare() { cmp -s "$@"; }
+else
+ compare() { cmp "$@"; }
+fi
+
+# An arbitrary prefix to help distinguish test directories.
+testdir_prefix_() { printf gt; }
+
+# Run the user-overridable cleanup_ function, remove the temporary
+# directory and exit with the incoming value of $?.
+remove_tmp_()
+{
+ __st=$?
+ cleanup_
+ # cd out of the directory we're about to remove
+ cd "$initial_cwd_" || cd / || cd /tmp
+ chmod -R u+rwx "$test_dir_"
+ # If removal fails and exit status was to be 0, then change it to 1.
+ rm -rf "$test_dir_" || { test $__st = 0 && __st=1; }
+ exit $__st
+}
+
+# Use this function to prepend to PATH an absolute name for each
+# specified, possibly-$initial_cwd_relative, directory.
+path_prepend_()
+{
+ while test $# != 0; do
+ path_dir_=$1
+ case $path_dir_ in
+ '') fail_ "invalid path dir: '$1'";;
+ /*) abs_path_dir_=$path_dir_;;
+ *) abs_path_dir_=`cd "$initial_cwd_/$path_dir_" && echo "$PWD"` \
+ || fail_ "invalid path dir: $path_dir_";;
+ esac
+ case $abs_path_dir_ in
+ *:*) fail_ "invalid path dir: '$abs_path_dir_'";;
+ esac
+ PATH="$abs_path_dir_:$PATH"
+ shift
+ done
+ export PATH
+}
+
+setup_()
+{
+ test "$VERBOSE" = yes && set -x
+
+ initial_cwd_=$PWD
+ ME_=`expr "./$0" : '.*/\(.*\)$'`
+
+ pfx_=`testdir_prefix_`
+ test_dir_=`mktempd_ "$initial_cwd_" "$pfx_-$ME_.XXXX"` \
+ || fail_ "failed to create temporary directory in $initial_cwd_"
+ cd "$test_dir_"
+
+ # This pair of trap statements ensures that the temporary directory,
+ # $test_dir_, is removed upon exit as well as upon catchable signal.
+ trap remove_tmp_ 0
+ trap 'Exit $?' 1 2 13 15
+}
+
+# Create a temporary directory, much like mktemp -d does.
+# Written by Jim Meyering.
+#
+# Usage: mktempd_ /tmp phoey.XXXXXXXXXX
+#
+# First, try to use the mktemp program.
+# Failing that, we'll roll our own mktemp-like function:
+# - try to get random bytes from /dev/urandom
+# - failing that, generate output from a combination of quickly-varying
+# sources and gzip. Ignore non-varying gzip header, and extract
+# "random" bits from there.
+# - given those bits, map to file-name bytes using tr, and try to create
+# the desired directory.
+# - make only $MAX_TRIES_ attempts
+
+# Helper function. Print $N pseudo-random bytes from a-zA-Z0-9.
+rand_bytes_()
+{
+ n_=$1
+
+ # Maybe try openssl rand -base64 $n_prime_|tr '+/=\012' abcd first?
+ # But if they have openssl, they probably have mktemp, too.
+
+ chars_=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
+ dev_rand_=/dev/urandom
+ if test -r "$dev_rand_"; then
+ # Note: 256-length($chars_) == 194; 3 copies of $chars_ is 186 + 8 = 194.
+ dd ibs=$n_ count=1 if=$dev_rand_ 2>/dev/null \
+ | tr -c $chars_ 01234567$chars_$chars_$chars_
+ return
+ fi
+
+ n_plus_50_=`expr $n_ + 50`
+ cmds_='date; date +%N; free; who -a; w; ps auxww; ps ef; netstat -n'
+ data_=` (eval "$cmds_") 2>&1 | gzip `
+
+ # Ensure that $data_ has length at least 50+$n_
+ while :; do
+ len_=`echo "$data_"|wc -c`
+ test $n_plus_50_ -le $len_ && break;
+ data_=` (echo "$data_"; eval "$cmds_") 2>&1 | gzip `
+ done
+
+ echo "$data_" \
+ | dd bs=1 skip=50 count=$n_ 2>/dev/null \
+ | tr -c $chars_ 01234567$chars_$chars_$chars_
+}
+
+mktempd_()
+{
+ case $# in
+ 2);;
+ *) fail_ "Usage: $ME DIR TEMPLATE";;
+ esac
+
+ destdir_=$1
+ template_=$2
+
+ MAX_TRIES_=4
+
+ # Disallow any trailing slash on specified destdir:
+ # it would subvert the post-mktemp "case"-based destdir test.
+ case $destdir_ in
+ /) ;;
+ */) fail_ "invalid destination dir: remove trailing slash(es)";;
+ esac
+
+ case $template_ in
+ *XXXX) ;;
+ *) fail_ "invalid template: $template_ (must have a suffix of at least 4 X's)";;
+ esac
+
+ fail=0
+
+ # First, try to use mktemp.
+ d=`env -u TMPDIR mktemp -d -t -p "$destdir_" "$template_" 2>/dev/null` \
+ || fail=1
+
+ # The resulting name must be in the specified directory.
+ case $d in "$destdir_"*);; *) fail=1;; esac
+
+ # It must have created the directory.
+ test -d "$d" || fail=1
+
+ # It must have 0700 permissions. Handle sticky "S" bits.
+ perms=`ls -dgo "$d" 2>/dev/null|tr S -` || fail=1
+ case $perms in drwx------*) ;; *) fail=1;; esac
+
+ test $fail = 0 && {
+ echo "$d"
+ return
+ }
+
+ # If we reach this point, we'll have to create a directory manually.
+
+ # Get a copy of the template without its suffix of X's.
+ base_template_=`echo "$template_"|sed 's/XX*$//'`
+
+ # Calculate how many X's we've just removed.
+ template_length_=`echo "$template_" | wc -c`
+ nx_=`echo "$base_template_" | wc -c`
+ nx_=`expr $template_length_ - $nx_`
+
+ err_=
+ i_=1
+ while :; do
+ X_=`rand_bytes_ $nx_`
+ candidate_dir_="$destdir_/$base_template_$X_"
+ err_=`mkdir -m 0700 "$candidate_dir_" 2>&1` \
+ && { echo "$candidate_dir_"; return; }
+ test $MAX_TRIES_ -le $i_ && break;
+ i_=`expr $i_ + 1`
+ done
+ fail_ "$err_"
+}
+
+# If you want to override the testdir_prefix_ function,
+# or to add more utility functions, use this file.
+test -f "$srcdir/init.cfg" \
+ && . "$srcdir/init.cfg"
+
+setup_ "$@"
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