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/* Test --no-hard-links option to localedef.
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Copyright (C) 2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* The test is designed to run in a container and execute localedef
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once without --no-hard-links, verify that there are 2 hard links to
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LC_CTYPE, and then run again *with* --no-hard-links and verify there
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are no hard links and link counts remain at 1. The expectation here
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is that LC_CTYPE is identical for both locales because they are same
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empty locale but with a different name. We use tests-container in
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this test because the hard link optimziation is only carried out for
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the default locale installation directory, and to write to that we
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need write access to that directory, enabled by 'su' via
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tests-container framework. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/xunistd.h>
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#include <support/capture_subprocess.h>
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/* Each test compiles a locale to output, and has an expected link count
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for LC_CTYPE. This test expects that localedef removes the existing
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files before installing new copies of the files, and we do not
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cleanup between localedef runs. We can't cleanup between each pair
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of runs since localedef must see the existing locale in order to
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determine that space could be saved by using a hardlink. */
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struct test_data
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{
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/* Arguments to localedef for this step. */
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const char * argv[16];
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/* Expected output file generated by running localedef. */
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const char *output;
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/* Expected st_nlink count for the output. */
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int st_nlink;
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};
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/* Check for link count. */
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void
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check_link (struct test_data step)
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{
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struct stat64 locale;
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char *output;
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output = xasprintf ("%s/%s", support_complocaledir_prefix, step.output);
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xstat (output, &locale);
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free (output);
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TEST_COMPARE (locale.st_nlink, step.st_nlink);
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}
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static void
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run_localedef (void *step)
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{
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const char *prog = xasprintf ("%s/localedef", support_bindir_prefix);
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struct test_data *one = (struct test_data *) step;
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one->argv[0] = prog;
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execv (prog, (char * const *) one->argv);
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FAIL_EXIT1 ("execv: %m");
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}
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#define TEST1DIR "test1_locale.dir"
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#define TEST2DIR "test2_locale.dir"
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/* The whole test has 4 steps described below. Note the argv[0] NULL
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will be filled in at runtime by run_localedef. */
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static struct test_data step[4] = {
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{ .argv = { NULL, "--no-archive", "-i", "/test1_locale", TEST1DIR, NULL },
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.output = TEST1DIR "/LC_CTYPE",
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.st_nlink = 1 },
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{ .argv = { NULL, "--no-archive", "-i", "/test2_locale", TEST2DIR, NULL },
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.output = TEST2DIR "/LC_CTYPE",
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.st_nlink = 2 },
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{ .argv = { NULL, "--no-archive", "--no-hard-links", "-i", "/test1_locale",
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TEST1DIR, NULL },
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.output = TEST1DIR "/LC_CTYPE",
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.st_nlink = 1 },
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{ .argv = { NULL, "--no-archive", "--no-hard-links", "-i", "/test2_locale",
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TEST1DIR, NULL },
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.output = TEST2DIR "/LC_CTYPE",
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.st_nlink = 1 },
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};
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static int
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do_test (void)
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{
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struct support_capture_subprocess result;
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printf ("INFO: $complocaledir is %s\n", support_complocaledir_prefix);
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/* Compile the first locale. */
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result = support_capture_subprocess (run_localedef, (void *) &step[0]);
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support_capture_subprocess_check (&result, "execv", 1, sc_allow_stderr);
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check_link (step[0]);
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/* This time around we should have link counts of 2 for the second
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linked locale since categories are identical. */
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result = support_capture_subprocess (run_localedef, (void *) &step[1]);
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support_capture_subprocess_check (&result, "execv", 1, sc_allow_stderr);
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check_link (step[1]);
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/* Again with --no-hard-links (link count is always one). */
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result = support_capture_subprocess (run_localedef, (void *) &step[2]);
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support_capture_subprocess_check (&result, "execv", 1, sc_allow_stderr);
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check_link (step[2]);
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/* Again with --no-hard-links, and the link count must remain 1. */
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result = support_capture_subprocess (run_localedef, (void *) &step[3]);
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support_capture_subprocess_check (&result, "execv", 1, sc_allow_stderr);
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check_link (step[3]);
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/* Tested without and with --no-hard-links and link counts were
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consistent. */
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return EXIT_SUCCESS;
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}
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#include <support/test-driver.c>
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Carlos O'Donell