#! /bin/sh
# FS QA Test No. 005
#
# Test symlinks & ELOOP
#
#-----------------------------------------------------------------------
# Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
#
# 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.
#
# This program is distributed in the hope that it would 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 the Free Software Foundation,
# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#
#-----------------------------------------------------------------------
#
# creator
owner=dxm@sgi.com

#
# Note1: On Linux, ELOOP limit used to be 32 but changed to 8, and lately
# its become 5.  Who knows what it might be next.
# Note2: On IRIX, the limit is around the 30 mark.
# 
# What we are looking for here is: no panic due to blowing the stack;
# and that the ELOOP error code is returned at some point (the actual
# limit point is unimportant, just checking that we do hit it).
# 

seq=`basename $0`
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=0	# success is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
    cd $testdir
    rm -f symlink_{0,1,2,3}{0,1,2,3,4,5,6,7,8,9} symlink_self empty_file
    cd /
    _cleanup_testdir
}

_touch()
{
    # On IRIX: Too many symbolic links in path name traversal
    # On Linux: Too many levels of symbolic links
    touch $@ 2>&1 | grep -q 'Too many.*symbolic links'
    if [ $? -eq 0 ]; then
	echo "ELOOP returned.  Good."
    else
	echo "No ELOOP?  Unexpected!"
    fi
}

# get standard environment, filters and checks
. ./common.rc
. ./common.filter

# real QA test starts here
_supported_fs xfs udf nfs

# IRIX UDF does not support symlinks
if [ $FSTYP == 'udf' ]; then
    _supported_os Linux
else
    _supported_os Linux IRIX
fi

_setup_testdir

cd $testdir

o=empty_file
touch $o
for f in symlink_{0,1,2,3}{0,1,2,3,4,5,6,7,8,9}
do
    ln -s $o $f
    o=$f
done

ln -s symlink_self symlink_self

echo "*** touch deep symlinks"
echo ""
_touch symlink_{0,1,2,3}{0,1,2,3,4,5,6,7,8,9}
echo ""
echo "*** touch recusive symlinks"
echo ""
_touch symlink_self

exit