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#!/bin/sh
# Test df's behaviour when the mount list cannot be read.
# This test is skipped on systems that lack LD_PRELOAD support; that's fine.
# Copyright (C) 2012 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/>.
. "${srcdir=.}/init.sh"; path_prepend_ ../src
print_ver_ df
df || skip_ "df fails"
# Simulate "mtab" failure.
cat > k.c <<'EOF' || framework_failure_
#include <stdio.h>
#include <errno.h>
struct mntent *getmntent (FILE *fp)
{
/* Prove that LD_PRELOAD works. */
static int done = 0;
if (!done)
{
fclose (fopen ("x", "w"));
++done;
}
/* Now simulate the failure. */
errno = ENOENT;
return NULL;
}
EOF
# Then compile/link it:
$CC -shared -fPIC -ldl -O2 k.c -o k.so \
|| framework_failure_ 'failed to compile with -shared -fPIC'
# Test if LD_PRELOAD works:
LD_PRELOAD=./k.so df
test -f x || skip_ "internal test failure: maybe LD_PRELOAD doesn't work?"
# These tests are supposed to succeed:
LD_PRELOAD=./k.so df '.' || fail=1
LD_PRELOAD=./k.so df -i '.' || fail=1
LD_PRELOAD=./k.so df -T '.' || fail=1
LD_PRELOAD=./k.so df -Ti '.' || fail=1
LD_PRELOAD=./k.so df --total '.' || fail=1
# These tests are supposed to fail:
LD_PRELOAD=./k.so df && fail=1
LD_PRELOAD=./k.so df -i && fail=1
LD_PRELOAD=./k.so df -T && fail=1
LD_PRELOAD=./k.so df -Ti && fail=1
LD_PRELOAD=./k.so df --total && fail=1
LD_PRELOAD=./k.so df -a && fail=1
LD_PRELOAD=./k.so df -a '.' && fail=1
LD_PRELOAD=./k.so df -l && fail=1
LD_PRELOAD=./k.so df -l '.' && fail=1
LD_PRELOAD=./k.so df -t hello && fail=1
LD_PRELOAD=./k.so df -t hello '.' && fail=1
LD_PRELOAD=./k.so df -x hello && fail=1
LD_PRELOAD=./k.so df -x hello '.' && fail=1
Exit $fail
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