1 | /* Test --no-hard-links option to localedef. |
2 | Copyright (C) 2020-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | /* The test is designed to run in a container and execute localedef |
20 | once without --no-hard-links, verify that there are 2 hard links to |
21 | LC_CTYPE, and then run again *with* --no-hard-links and verify there |
22 | are no hard links and link counts remain at 1. The expectation here |
23 | is that LC_CTYPE is identical for both locales because they are same |
24 | empty locale but with a different name. We use tests-container in |
25 | this test because the hard link optimziation is only carried out for |
26 | the default locale installation directory, and to write to that we |
27 | need write access to that directory, enabled by 'su' via |
28 | tests-container framework. */ |
29 | |
30 | #include <stdio.h> |
31 | #include <stdlib.h> |
32 | #include <sys/stat.h> |
33 | #include <sys/types.h> |
34 | #include <sys/wait.h> |
35 | |
36 | #include <support/check.h> |
37 | #include <support/support.h> |
38 | #include <support/xunistd.h> |
39 | #include <support/capture_subprocess.h> |
40 | |
41 | /* Each test compiles a locale to output, and has an expected link count |
42 | for LC_CTYPE. This test expects that localedef removes the existing |
43 | files before installing new copies of the files, and we do not |
44 | cleanup between localedef runs. We can't cleanup between each pair |
45 | of runs since localedef must see the existing locale in order to |
46 | determine that space could be saved by using a hardlink. */ |
47 | struct test_data |
48 | { |
49 | /* Arguments to localedef for this step. */ |
50 | const char * argv[16]; |
51 | /* Expected output file generated by running localedef. */ |
52 | const char *output; |
53 | /* Expected st_nlink count for the output. */ |
54 | int st_nlink; |
55 | }; |
56 | |
57 | /* Check for link count. */ |
58 | void |
59 | check_link (struct test_data step) |
60 | { |
61 | struct stat64 locale; |
62 | char *output; |
63 | |
64 | output = xasprintf (format: "%s/%s" , support_complocaledir_prefix, step.output); |
65 | xstat (path: output, &locale); |
66 | free (ptr: output); |
67 | TEST_COMPARE (locale.st_nlink, step.st_nlink); |
68 | } |
69 | |
70 | static void |
71 | run_localedef (void *step) |
72 | { |
73 | const char *prog = xasprintf (format: "%s/localedef" , support_bindir_prefix); |
74 | struct test_data *one = (struct test_data *) step; |
75 | |
76 | one->argv[0] = prog; |
77 | execv (path: prog, argv: (char * const *) one->argv); |
78 | FAIL_EXIT1 ("execv: %m" ); |
79 | } |
80 | |
81 | #define TEST1DIR "test1_locale.dir" |
82 | #define TEST2DIR "test2_locale.dir" |
83 | |
84 | /* The whole test has 4 steps described below. Note the argv[0] NULL |
85 | will be filled in at runtime by run_localedef. */ |
86 | static struct test_data step[4] = { |
87 | { .argv = { NULL, "--no-archive" , "-i" , "/test1_locale" , TEST1DIR, NULL }, |
88 | .output = TEST1DIR "/LC_CTYPE" , |
89 | .st_nlink = 1 }, |
90 | { .argv = { NULL, "--no-archive" , "-i" , "/test2_locale" , TEST2DIR, NULL }, |
91 | .output = TEST2DIR "/LC_CTYPE" , |
92 | .st_nlink = 2 }, |
93 | { .argv = { NULL, "--no-archive" , "--no-hard-links" , "-i" , "/test1_locale" , |
94 | TEST1DIR, NULL }, |
95 | .output = TEST1DIR "/LC_CTYPE" , |
96 | .st_nlink = 1 }, |
97 | { .argv = { NULL, "--no-archive" , "--no-hard-links" , "-i" , "/test2_locale" , |
98 | TEST1DIR, NULL }, |
99 | .output = TEST2DIR "/LC_CTYPE" , |
100 | .st_nlink = 1 }, |
101 | }; |
102 | |
103 | static int |
104 | do_test (void) |
105 | { |
106 | struct support_capture_subprocess result; |
107 | |
108 | printf (format: "INFO: $complocaledir is %s\n" , support_complocaledir_prefix); |
109 | /* Compile the first locale. */ |
110 | result = support_capture_subprocess (callback: run_localedef, closure: (void *) &step[0]); |
111 | support_capture_subprocess_check (&result, context: "execv" , status_or_signal: 1, allowed: sc_allow_stderr); |
112 | check_link (step: step[0]); |
113 | |
114 | /* This time around we should have link counts of 2 for the second |
115 | linked locale since categories are identical. */ |
116 | result = support_capture_subprocess (callback: run_localedef, closure: (void *) &step[1]); |
117 | support_capture_subprocess_check (&result, context: "execv" , status_or_signal: 1, allowed: sc_allow_stderr); |
118 | check_link (step: step[1]); |
119 | |
120 | /* Again with --no-hard-links (link count is always one). */ |
121 | result = support_capture_subprocess (callback: run_localedef, closure: (void *) &step[2]); |
122 | support_capture_subprocess_check (&result, context: "execv" , status_or_signal: 1, allowed: sc_allow_stderr); |
123 | check_link (step: step[2]); |
124 | |
125 | /* Again with --no-hard-links, and the link count must remain 1. */ |
126 | result = support_capture_subprocess (callback: run_localedef, closure: (void *) &step[3]); |
127 | support_capture_subprocess_check (&result, context: "execv" , status_or_signal: 1, allowed: sc_allow_stderr); |
128 | check_link (step: step[3]); |
129 | |
130 | /* Tested without and with --no-hard-links and link counts were |
131 | consistent. */ |
132 | return EXIT_SUCCESS; |
133 | } |
134 | |
135 | #include <support/test-driver.c> |
136 | |