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39e2a4cff8
* tests/df/no-mtab-status.sh: Skip if getmntent() not available. * tests/df/skip-duplicates.sh: Likewise. Fixes http://bugs.gnu.org/17863
131 lines
4.3 KiB
Bash
Executable File
131 lines
4.3 KiB
Bash
Executable File
#!/bin/sh
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# Test df's behavior when the mount list contains duplicate entries.
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# This test is skipped on systems that lack LD_PRELOAD support; that's fine.
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# Copyright (C) 2012-2014 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ df
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require_gcc_shared_
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# We use --local here so as to not activate
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# potentially very many remote mounts.
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df --local || skip_ "df fails"
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export CU_NONROOT_FS=$(df --local --output=target 2>&1 | grep /. | head -n1)
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test -z "$CU_NONROOT_FS" && unique_entries=1 || unique_entries=2
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grep '^#define HAVE_MNTENT_H 1' $CONFIG_HEADER > /dev/null \
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|| skip_ "no mntent.h available to confirm the interface"
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grep '^#define HAVE_GETMNTENT 1' $CONFIG_HEADER > /dev/null \
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|| skip_ "getmntent is not used on this system"
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# Simulate an mtab file to test various cases.
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cat > k.c <<'EOF' || framework_failure_
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <mntent.h>
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#define STREQ(a, b) (strcmp (a, b) == 0)
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struct mntent *getmntent (FILE *fp)
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{
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static char *nonroot_fs;
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static int done;
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/* Prove that LD_PRELOAD works. */
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if (!done)
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{
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fclose (fopen ("x", "w"));
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++done;
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}
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static struct mntent mntents[] = {
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{.mnt_fsname="/short", .mnt_dir="/invalid/mount/dir"},
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{.mnt_fsname="fsname", .mnt_dir="/",},
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{.mnt_fsname="/fsname", .mnt_dir="/."},
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{.mnt_fsname="/fsname", .mnt_dir="/"},
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{.mnt_fsname="virtfs", .mnt_dir="/NONROOT", .mnt_type="fstype1"},
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{.mnt_fsname="virtfs2", .mnt_dir="/NONROOT", .mnt_type="fstype2"},
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{.mnt_fsname="netns", .mnt_dir="net:[1234567]"},
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};
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if (done == 1)
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{
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nonroot_fs = getenv ("CU_NONROOT_FS");
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if (!nonroot_fs || !*nonroot_fs)
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nonroot_fs = "/"; /* merge into / entries. */
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}
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if (done == 1 && !getenv ("CU_TEST_DUPE_INVALID"))
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done++; /* skip the first entry. */
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while (done++ <= 7)
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{
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if (!mntents[done-2].mnt_type)
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mntents[done-2].mnt_type = "-";
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if (STREQ (mntents[done-2].mnt_dir, "/NONROOT"))
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mntents[done-2].mnt_dir = nonroot_fs;
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return &mntents[done-2];
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}
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return NULL;
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}
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EOF
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# Then compile/link it:
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gcc_shared_ k.c k.so \
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|| framework_failure_ 'failed to build shared library'
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# Test if LD_PRELOAD works:
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LD_PRELOAD=./k.so df
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test -f x || skip_ "internal test failure: maybe LD_PRELOAD doesn't work?"
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# The fake mtab file should only contain entries
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# having the same device number; thus the output should
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# consist of a header and unique entries.
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LD_PRELOAD=./k.so df -T >out || fail=1
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test $(wc -l <out) -eq $(expr 1 + $unique_entries) || { fail=1; cat out; }
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# Ensure we don't fail when unable to stat (currently) unavailable entries
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LD_PRELOAD=./k.so CU_TEST_DUPE_INVALID=1 df -T >out || fail=1
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test $(wc -l <out) -eq $(expr 1 + $unique_entries) || { fail=1; cat out; }
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# df should also prefer "/fsname" over "fsname"
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if test "$unique_entries" = 2; then
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test $(grep -c '/fsname' <out) -eq 1 || { fail=1; cat out; }
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# ... and "/fsname" with '/' as Mounted on over '/.'
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test $(grep -cF '/.' <out) -eq 0 || { fail=1; cat out; }
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fi
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# df should use the last seen devname (mnt_fsname) and devtype (mnt_type)
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test $(grep -c 'virtfs2.*fstype2' <out) -eq 1 || { fail=1; cat out; }
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# Ensure that filtering duplicates does not affect -a processing.
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LD_PRELOAD=./k.so df -a >out || fail=1
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test $(wc -l <out) -eq 6 || { fail=1; cat out; }
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# Ensure placeholder "-" values used for the eclipsed "virtfs"
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test $(grep -c 'virtfs *-' <out) -eq 1 || { fail=1; cat out; }
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# Ensure that filtering duplicates does not affect
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# argument processing (now without the fake getmntent()).
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df '.' '.' >out || fail=1
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test $(wc -l <out) -eq 3 || { fail=1; cat out; }
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Exit $fail
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