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edc5bc5020
* tests/cp/no-ctx.sh: Scope of `var=val func` is inconsistent across shells, so avoid that construct with functions. * tests/df/no-mtab-status.sh: Likewise. * tests/tail-2/inotify-race.sh: `read` needs an argument. * tests/tail-2/inotify-race2.sh: Likewise.
126 lines
3.2 KiB
Bash
Executable File
126 lines
3.2 KiB
Bash
Executable File
#!/bin/sh
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# Test df's behaviour when the mount list cannot be read.
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# This test is skipped on systems that lack LD_PRELOAD support; that's fine.
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# Copyright (C) 2012-2015 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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# Protect against inaccessible remote mounts etc.
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timeout 10 df || skip_ "df fails"
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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 "mtab" failure.
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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 <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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struct mntent *getmntent (FILE *fp)
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{
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/* Prove that LD_PRELOAD works. */
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static int done = 0;
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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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/* Now simulate the failure. */
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errno = ENOENT;
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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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cleanup_() { unset LD_PRELOAD; }
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export LD_PRELOAD=./k.so
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# Test if LD_PRELOAD works:
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df 2>/dev/null
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test -f x || skip_ "internal test failure: maybe LD_PRELOAD doesn't work?"
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# These tests are supposed to succeed:
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df '.' || fail=1
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df -i '.' || fail=1
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df -T '.' || fail=1
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df -Ti '.' || fail=1
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df --total '.' || fail=1
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# These tests are supposed to fail:
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returns_ 1 df || fail=1
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returns_ 1 df -i || fail=1
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returns_ 1 df -T || fail=1
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returns_ 1 df -Ti || fail=1
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returns_ 1 df --total || fail=1
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returns_ 1 df -a || fail=1
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returns_ 1 df -a '.' || fail=1
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returns_ 1 df -l || fail=1
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returns_ 1 df -l '.' || fail=1
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returns_ 1 df -t hello || fail=1
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returns_ 1 df -t hello '.' || fail=1
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returns_ 1 df -x hello || fail=1
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returns_ 1 df -x hello '.' || fail=1
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Exit $fail
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