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#!/bin/sh
# Show fts fails on old-fashioned systems.
# Copyright (C) 2006-2008 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/>.
# Show that fts (hence du, chmod, chgrp, chown) fails when all of the
# following are true:
# - `.' is not readable
# - operating on a hierarchy containing a relative name longer than PATH_MAX
# - run on a system where gnulib's openat emulation must resort to using
# save_cwd and restore_cwd (which fail if `.' is not readable).
# Thus, the following du invocation should succeed on newer Linux and
# Solaris systems, yet it must fail on systems lacking both openat and
# /proc support. However, before coreutils-6.0 this test would fail even
# on Linux+PROC_FS systems because its fts implementation would revert
# unnecessarily to using FTS_NOCHDIR mode in this corner case.
if test "$VERBOSE" = yes; then
set -x
du --version
fi
. $srcdir/test-lib.sh
proc_file=/proc/self/fd
if test ! -d $proc_file; then
skip_test_ 'This test would fail, since your system lacks /proc support.'
fi
dir=`printf '%200s\n' ' '|tr ' ' x`
# Construct a hierarchy containing a relative file with a name
# longer than PATH_MAX.
# for i in `seq 52`; do
# mkdir $dir || framework_failure
# cd $dir || framework_failure
# done
# cd $tmp || framework_failure
# Sheesh. Bash 3.1.5 can't create this hierarchy. I get
# cd: error retrieving current directory: getcwd: cannot access parent directories:
cwd=`pwd`
# Use perl instead:
: ${PERL=perl}
$PERL \
-e 'my $d = '$dir'; foreach my $i (1..52)' \
-e ' { mkdir ($d, 0700) && chdir $d or die "$!" }' \
|| framework_failure
mkdir inaccessible || framework_failure
cd inaccessible || framework_failure
chmod 0 . || framework_failure
fail=0
du -s "$cwd/$dir" > /dev/null || fail=1
(exit $fail); exit $fail
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