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https://github.com/coreutils/coreutils.git
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32ff1d1313
Run "make update-copyright" and then... * gnulib: Update to latest with copyright year adjusted. * tests/init.sh: Sync with gnulib to pick up copyright year. * bootstrap: Likewise. * tests/sample-test: Adjust to use the single most recent year.
192 lines
6.5 KiB
Bash
Executable File
192 lines
6.5 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) 2012-2021 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 <https://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ df
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require_gcc_shared_
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# We use --local here so as to not activate
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# potentially very many remote mounts.
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df --local --output=target >LOCAL_FS || skip_ 'df fails'
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grep '^/$' LOCAL_FS || skip_ 'no root file system found'
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# Get real targets to substitute for /NONROOT and /REMOTE below.
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export CU_NONROOT_FS=$(grep /. LOCAL_FS | head -n1)
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export CU_REMOTE_FS=$(grep /. LOCAL_FS | tail -n+2 | head -n1)
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unique_entries=1
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test -z "$CU_NONROOT_FS" || unique_entries=$(expr $unique_entries + 1)
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test -z "$CU_REMOTE_FS" || unique_entries=$(expr $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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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <mntent.h>
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#include <string.h>
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#include <dlfcn.h>
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#define STREQ(a, b) (strcmp (a, b) == 0)
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FILE* fopen(const char *path, const char *mode)
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{
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static FILE* (*fopen_func)(char const *, char const *);
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/* get reference to original (libc provided) fopen */
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if (!fopen_func)
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{
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fopen_func = (FILE*(*)(char const *, char const *))
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dlsym(RTLD_NEXT, "fopen");
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if (!fopen_func)
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{
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fprintf (stderr, "Failed to find fopen()\n");
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errno = ESRCH;
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return NULL;
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}
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}
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/* Returning ENOENT here will get read_file_system_list()
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to fall back to using getmntent() below. */
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if (STREQ (path, "/proc/self/mountinfo"))
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{
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errno = ENOENT;
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return NULL;
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}
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else
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return fopen_func(path, mode);
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}
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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 char *remote_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", .mnt_opts=""},
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{.mnt_fsname="fsname", .mnt_dir="/", .mnt_opts=""},
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{.mnt_fsname="/fsname", .mnt_dir="/.", .mnt_opts=""},
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{.mnt_fsname="/fsname", .mnt_dir="/", .mnt_opts=""},
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{.mnt_fsname="virtfs", .mnt_dir="/NONROOT", .mnt_type="t1", .mnt_opts=""},
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{.mnt_fsname="virtfs2", .mnt_dir="/NONROOT", .mnt_type="t2", .mnt_opts=""},
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{.mnt_fsname="netns", .mnt_dir="net:[1234567]", .mnt_opts=""},
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{.mnt_fsname="rem:ote1",.mnt_dir="/REMOTE", .mnt_opts=""},
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{.mnt_fsname="rem:ote1",.mnt_dir="/REMOTE", .mnt_opts=""},
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{.mnt_fsname="rem:ote2",.mnt_dir="/REMOTE", .mnt_opts=""},
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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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remote_fs = getenv ("CU_REMOTE_FS");
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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++ <= 10)
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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 (!mntents[done-2].mnt_opts)
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mntents[done-2].mnt_opts = "-";
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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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if (STREQ (mntents[done-2].mnt_dir, "/REMOTE"))
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{
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if (!remote_fs || !*remote_fs)
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continue;
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else
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mntents[done-2].mnt_dir = remote_fs;
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}
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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=$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=$LD_PRELOAD:./k.so df -T >out || fail=1
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test $(wc -l <out) -eq $(expr 1 + $unique_entries) || { fail=1; cat out; }
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# With --total we should suppress the duplicate but separate remote file system
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LD_PRELOAD=$LD_PRELOAD:./k.so df --total >out || fail=1
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test "$CU_REMOTE_FS" && elide_remote=1 || elide_remote=0
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test $(wc -l <out) -eq $(expr 2 + $unique_entries - $elide_remote) ||
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{ fail=1; cat out; }
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# Ensure we don't fail when unable to stat (currently) unavailable entries
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LD_PRELOAD=$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 $(grep -c 'virtfs2.*t2' <out) -eq 1 || { fail=1; cat out; }
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# Ensure that filtering duplicates does not affect -a processing.
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LD_PRELOAD=$LD_PRELOAD:./k.so df -a >out || fail=1
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total_fs=6; test "$CU_REMOTE_FS" && total_fs=$(expr $total_fs + 3)
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test $(wc -l <out) -eq $total_fs || { 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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