1 files changed, 99 insertions, 0 deletions
diff --git a/tests/du/long-sloop b/tests/du/long-sloop
new file mode 100755
index 0000000..f5f9423
--- /dev/null
+++ b/tests/du/long-sloop
@@ -0,0 +1,99 @@
+#!/bin/sh
+# Use du to exercise a corner of fts's FTS_LOGICAL code.
+# Show that du fails with ELOOP (Too many levels of symbolic links)
+# when it encounters that condition.
+
+# Copyright (C) 2006 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 2 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, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
+
+if test "$VERBOSE" = yes; then
+  set -x
+  du --version
+fi
+
+. $srcdir/../lang-default
+
+pwd=`pwd`
+t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
+trap 'status=$?; cd "$pwd" && chmod -R u+rwx $t0 && rm -rf $t0 && exit $status' 0
+trap '(exit $?); exit $?' 1 2 13 15
+
+framework_failure=0
+mkdir -p $tmp || framework_failure=1
+cd $tmp || framework_failure=1
+
+# Create lots of directories, each containing a single symlink
+# pointing at the next directory in the list.
+
+# This number should be larger than the number of symlinks allowed in
+# file name resolution, but not too large as a number of entries
+# in a single directory.
+n=400
+
+dir_list=`seq $n`
+mkdir $dir_list || framework_failure=1
+file=1
+i_minus_1=0
+for i in $dir_list `expr $n + 1`; do
+  case $i_minus_1 in
+  0) ;;
+  *)
+    ln -s ../$i $i_minus_1/s || framework_failure=1
+    file=$file/s;;
+  esac
+  i_minus_1=$i
+done
+echo foo > $i
+
+if test $framework_failure = 1; then
+  echo "$0: failure in testing framework" 1>&2
+  (exit 1); exit 1
+fi
+
+# If a system can handle this many symlinks in a file name,
+# just skip this test.
+
+# The following also serves to record in `err' the string
+# corresponding to strerror (ELOOP).  This is necessary because while
+# Linux/libc gives `Too many levels of symbolic links', Solaris
+# renders it as `Number of symbolic links encountered during path
+# name traversal exceeds MAXSYMLINKS'.
+
+cat $file > /dev/null 2> err && \
+  {
+    cat <<EOF >&2
+$0: Your system appears to be able to handle more than $n symlinks
+in file name resolution, so skipping this test.
+EOF
+    (exit 77); exit 77
+  }
+too_many=`sed 's/.*: //' err`
+
+fail=0
+
+# With coreutils-5.93 there was no failure.
+# With coreutils-5.94 we get the desired diagnostic:
+# du: cannot access `1/s/s/s/.../s': Too many levels of symbolic links
+du -L 1 > /dev/null 2> out1 && fail=1
+sed "s, .1/s/s/s/[/s]*',," out1 > out || fail=1
+
+echo "du: cannot access: $too_many" > exp || fail=1
+
+cmp out exp || fail=1
+test $fail = 1 && diff out exp 2> /dev/null
+
+(exit $fail); exit $fail