mirror of
git://git.sv.gnu.org/coreutils.git
synced 2026-04-20 10:51:48 +02:00
616fa9c7b3
* src/df.c (filter_mount_list): Initialize devlist->dev_num correctly when unable to stat() a mount point. This will avoid possible invalid deduplication done on the list due to use of uninitialized memory. * tests/df/skip-duplicates.sh: Ensure this code path is exercised. Also refactor the test to be table driven. * NEWS: Mention the bug fix.
95 lines
3.0 KiB
Bash
Executable File
95 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
|
|
# Test df's behavior when the mount list contains duplicate entries.
|
|
# This test is skipped on systems that lack LD_PRELOAD support; that's fine.
|
|
|
|
# Copyright (C) 2012-2013 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=.}/tests/init.sh"; path_prepend_ ./src
|
|
print_ver_ df
|
|
require_gcc_shared_
|
|
|
|
df || skip_ "df fails"
|
|
|
|
# Simulate an mtab file with two entries of the same device number.
|
|
# Also add entries with unstatable mount dirs to ensure that's handled.
|
|
cat > k.c <<'EOF' || framework_failure_
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <mntent.h>
|
|
|
|
struct mntent *getmntent (FILE *fp)
|
|
{
|
|
/* Prove that LD_PRELOAD works. */
|
|
static int done = 0;
|
|
if (!done)
|
|
{
|
|
fclose (fopen ("x", "w"));
|
|
++done;
|
|
}
|
|
|
|
static struct mntent mntents[] = {
|
|
{.mnt_fsname="/short", .mnt_dir="/invalid/mount/dir"},
|
|
{.mnt_fsname="fsname", .mnt_dir="/",},
|
|
{.mnt_fsname="/fsname", .mnt_dir="/root"},
|
|
{.mnt_fsname="/fsname", .mnt_dir="/"},
|
|
};
|
|
|
|
if (!getenv ("CU_TEST_DUPE_INVALID") && done == 1)
|
|
done++; /* skip the first entry. */
|
|
|
|
while (done++ <= 4)
|
|
{
|
|
mntents[done-2].mnt_type = "-";
|
|
return &mntents[done-2];
|
|
}
|
|
return NULL;
|
|
}
|
|
EOF
|
|
|
|
# Then compile/link it:
|
|
gcc --std=gnu99 -shared -fPIC -ldl -O2 k.c -o k.so \
|
|
|| framework_failure_ 'failed to build shared library'
|
|
|
|
# Test if LD_PRELOAD works:
|
|
LD_PRELOAD=./k.so df
|
|
test -f x || skip_ "internal test failure: maybe LD_PRELOAD doesn't work?"
|
|
|
|
# The fake mtab file should only contain entries
|
|
# having the same device number; thus the output should
|
|
# consist of a header and one entry.
|
|
LD_PRELOAD=./k.so df >out || fail=1
|
|
test $(wc -l <out) -eq 2 || { fail=1; cat out; }
|
|
|
|
# Ensure we fail when unable to stat invalid entries
|
|
LD_PRELOAD=./k.so CU_TEST_DUPE_INVALID=1 df >out && fail=1
|
|
test $(wc -l <out) -eq 2 || { fail=1; cat out; }
|
|
|
|
# df should also prefer "/fsname" over "fsname"
|
|
test $(grep -c '/fsname' <out) -eq 1 || { fail=1; cat out; }
|
|
# ... and "/fsname" with '/' as Mounted on over '/root'
|
|
test $(grep -c '/root' <out) -eq 0 || { fail=1; cat out; }
|
|
|
|
# Ensure that filtering duplicates does not affect -a processing.
|
|
LD_PRELOAD=./k.so df -a >out || fail=1
|
|
test $(wc -l <out) -eq 4 || { fail=1; cat out; }
|
|
|
|
# Ensure that filtering duplicates does not affect
|
|
# argument processing (now without the fake getmntent()).
|
|
df '.' '.' >out || fail=1
|
|
test $(wc -l <out) -eq 3 || { fail=1; cat out; }
|
|
|
|
Exit $fail
|