tests/generic/005

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
#
# FS QA Test No. 005
#
# Test symlinks & ELOOP
#
#
# Note: On Linux, ELOOP limit used to be 32 but changed to 8, and lately
# its become 5.  Who knows what it might be next.
# 
# 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).
# 

. ./common/preamble
_begin_fstest dir udf auto quick

status=0	# success is the default!

# Override the default cleanup function.
_cleanup()
{
    cd $TEST_DIR
    rm -f symlink_{0,1,2,3,4}{0,1,2,3,4,5,6,7,8,9} symlink_self empty_file
    cd /
}

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

# Import common functions.
. ./common/filter

_require_test
_require_symlinks

cd $TEST_DIR

o=empty_file
touch $o
for f in symlink_{0,1,2,3,4}{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_{0,1,2,3,4}{0,1,2,3,4,5,6,7,8,9}
echo ""
echo "*** touch recusive symlinks"
echo ""
_touch symlink_self

exit