2020-11-09 05:23:58 +01:00
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
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test-libmount: let's see how libmount parses stuff
With libmount-2.33.1-3.fc30.x86_64 I get:
/* test_libmount_unescaping_one escaped space + utf8 */
from '729 38 0:59 / /tmp/\342\200\236zupa\\040z\304\231bowa\342\200\235 rw,relatime shared:395 - tmpfs die\\040Br\303\274he rw,seclabel'
source: 'die Brühe'
source: 'die Br\303\274he'
source: 'die Brühe'
expected: 'die Brühe'
target: '/tmp/„zupa zębowa”'
target: '/tmp/\342\200\236zupa z\304\231bowa\342\200\235'
target: '/tmp/„zupa zębowa”'
expected: '/tmp/„zupa zębowa”'
/* test_libmount_unescaping_one escaped newline */
from '729 38 0:59 / /tmp/x\\012y rw,relatime shared:395 - tmpfs newline rw,seclabel'
source: 'newline'
source: 'newline'
source: 'newline'
expected: 'newline'
target: '/tmp/x
y'
target: '/tmp/x\ny'
target: '/tmp/x
y'
expected: '/tmp/x
y'
/* test_libmount_unescaping_one empty source */
from '760 38 0:60 / /tmp/emptysource rw,relatime shared:410 - tmpfs rw,seclabel'
source: ''
source: ''
source: ''
expected: ''
target: '/tmp/emptysource'
target: '/tmp/emptysource'
target: '/tmp/emptysource'
expected: '/tmp/emptysource'
/* test_libmount_unescaping_one foo\rbar */
from '790 38 0:61 / /tmp/foo\rbar rw,relatime shared:425 - tmpfs tmpfs rw,seclabel'
source: 'tmpfs'
source: 'tmpfs'
source: 'tmpfs'
expected: 'tmpfs'
target: '/tmp/foo'
target: '/tmp/foo'
target: '/tmp/foo'
expected: 'n/a'
With https://github.com/karelzak/util-linux/issues/780 fixed, we get
/* test_libmount_unescaping_one foo\rbar */
from '790 38 0:61 / /tmp/foo\rbar rw,relatime shared:425 - tmpfs tmpfs rw,seclabel'
source: 'tmpfs'
source: 'tmpfs'
source: 'tmpfs'
expected: 'tmpfs'
target: '/tmp/foo
bar'
target: '/tmp/foo\rbar'
target: '/tmp/foo
bar'
expected: '/tmp/foo
bar'
2019-04-05 09:43:12 +02:00
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#include "alloc-util.h"
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#include "fd-util.h"
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#include "escape.h"
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#include "libmount-util.h"
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#include "tests.h"
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static void test_libmount_unescaping_one(
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const char *title,
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const char *string,
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bool may_fail,
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const char *expected_source,
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const char *expected_target) {
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/* A test for libmount really */
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int r;
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log_info("/* %s %s */", __func__, title);
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_cleanup_(mnt_free_tablep) struct libmnt_table *table = NULL;
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_cleanup_(mnt_free_iterp) struct libmnt_iter *iter = NULL;
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_cleanup_fclose_ FILE *f = NULL;
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f = fmemopen((char*) string, strlen(string), "re");
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assert_se(f);
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2019-04-05 14:43:06 +02:00
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assert_se(libmount_parse(title, f, &table, &iter) >= 0);
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test-libmount: let's see how libmount parses stuff
With libmount-2.33.1-3.fc30.x86_64 I get:
/* test_libmount_unescaping_one escaped space + utf8 */
from '729 38 0:59 / /tmp/\342\200\236zupa\\040z\304\231bowa\342\200\235 rw,relatime shared:395 - tmpfs die\\040Br\303\274he rw,seclabel'
source: 'die Brühe'
source: 'die Br\303\274he'
source: 'die Brühe'
expected: 'die Brühe'
target: '/tmp/„zupa zębowa”'
target: '/tmp/\342\200\236zupa z\304\231bowa\342\200\235'
target: '/tmp/„zupa zębowa”'
expected: '/tmp/„zupa zębowa”'
/* test_libmount_unescaping_one escaped newline */
from '729 38 0:59 / /tmp/x\\012y rw,relatime shared:395 - tmpfs newline rw,seclabel'
source: 'newline'
source: 'newline'
source: 'newline'
expected: 'newline'
target: '/tmp/x
y'
target: '/tmp/x\ny'
target: '/tmp/x
y'
expected: '/tmp/x
y'
/* test_libmount_unescaping_one empty source */
from '760 38 0:60 / /tmp/emptysource rw,relatime shared:410 - tmpfs rw,seclabel'
source: ''
source: ''
source: ''
expected: ''
target: '/tmp/emptysource'
target: '/tmp/emptysource'
target: '/tmp/emptysource'
expected: '/tmp/emptysource'
/* test_libmount_unescaping_one foo\rbar */
from '790 38 0:61 / /tmp/foo\rbar rw,relatime shared:425 - tmpfs tmpfs rw,seclabel'
source: 'tmpfs'
source: 'tmpfs'
source: 'tmpfs'
expected: 'tmpfs'
target: '/tmp/foo'
target: '/tmp/foo'
target: '/tmp/foo'
expected: 'n/a'
With https://github.com/karelzak/util-linux/issues/780 fixed, we get
/* test_libmount_unescaping_one foo\rbar */
from '790 38 0:61 / /tmp/foo\rbar rw,relatime shared:425 - tmpfs tmpfs rw,seclabel'
source: 'tmpfs'
source: 'tmpfs'
source: 'tmpfs'
expected: 'tmpfs'
target: '/tmp/foo
bar'
target: '/tmp/foo\rbar'
target: '/tmp/foo
bar'
expected: '/tmp/foo
bar'
2019-04-05 09:43:12 +02:00
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struct libmnt_fs *fs;
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const char *source, *target;
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_cleanup_free_ char *x = NULL, *cs = NULL, *s = NULL, *ct = NULL, *t = NULL;
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/* We allow this call and the checks below to fail in some cases. See the case definitions below. */
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r = mnt_table_next_fs(table, iter, &fs);
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if (r != 0 && may_fail) {
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log_error_errno(r, "mnt_table_next_fs failed: %m");
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return;
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}
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assert_se(r == 0);
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assert_se(x = cescape(string));
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assert_se(source = mnt_fs_get_source(fs));
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assert_se(target = mnt_fs_get_target(fs));
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assert_se(cs = cescape(source));
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assert_se(ct = cescape(target));
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assert_se(cunescape(source, UNESCAPE_RELAX, &s) >= 0);
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assert_se(cunescape(target, UNESCAPE_RELAX, &t) >= 0);
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log_info("from '%s'", x);
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log_info("source: '%s'", source);
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log_info("source: '%s'", cs);
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log_info("source: '%s'", s);
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log_info("expected: '%s'", strna(expected_source));
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log_info("target: '%s'", target);
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log_info("target: '%s'", ct);
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log_info("target: '%s'", t);
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log_info("expected: '%s'", strna(expected_target));
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assert_se(may_fail || streq(source, expected_source));
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assert_se(may_fail || streq(target, expected_target));
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assert_se(mnt_table_next_fs(table, iter, &fs) == 1);
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}
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static void test_libmount_unescaping(void) {
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test_libmount_unescaping_one(
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"escaped space + utf8",
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"729 38 0:59 / /tmp/„zupa\\040zębowa” rw,relatime shared:395 - tmpfs die\\040Brühe rw,seclabel",
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false,
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"die Brühe",
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"/tmp/„zupa zębowa”"
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);
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test_libmount_unescaping_one(
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"escaped newline",
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"729 38 0:59 / /tmp/x\\012y rw,relatime shared:395 - tmpfs newline rw,seclabel",
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false,
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"newline",
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"/tmp/x\ny"
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);
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/* The result of "mount -t tmpfs '' /tmp/emptysource".
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* This will fail with libmount <= v2.33.
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* See https://github.com/karelzak/util-linux/commit/18a52a5094.
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*/
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test_libmount_unescaping_one(
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"empty source",
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"760 38 0:60 / /tmp/emptysource rw,relatime shared:410 - tmpfs rw,seclabel",
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true,
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"",
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"/tmp/emptysource"
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);
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/* The kernel leaves \r as is.
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* Also see https://github.com/karelzak/util-linux/issues/780.
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*/
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test_libmount_unescaping_one(
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"foo\\rbar",
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"790 38 0:61 / /tmp/foo\rbar rw,relatime shared:425 - tmpfs tmpfs rw,seclabel",
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true,
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"tmpfs",
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"/tmp/foo\rbar"
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);
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}
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int main(int argc, char *argv[]) {
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test_setup_logging(LOG_DEBUG);
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test_libmount_unescaping();
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return 0;
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}
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