1/* Tests for loading and unloading of iconv modules.
2 Copyright (C) 2000-2022 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#include <iconv.h>
20#include <mcheck.h>
21#include <stdio.h>
22#include <stdlib.h>
23
24
25/* How many load/unload operations do we do. */
26#define TEST_ROUNDS 5000
27
28
29enum state { unloaded, loaded };
30
31struct
32{
33 const char *name;
34 enum state state;
35 iconv_t cd;
36} modules[] =
37{
38#define MODULE(Name) { .name = #Name, .state = unloaded }
39 MODULE (ISO-8859-1),
40 MODULE (ISO-8859-2),
41 MODULE (ISO-8859-3),
42 MODULE (ISO-8859-4),
43 MODULE (ISO-8859-5),
44 MODULE (ISO-8859-6),
45 MODULE (ISO-8859-15),
46 MODULE (EUC-JP),
47 MODULE (EUC-KR),
48 MODULE (EUC-CN),
49 MODULE (EUC-TW),
50 MODULE (SJIS),
51 MODULE (UHC),
52 MODULE (KOI8-R),
53 MODULE (BIG5),
54 MODULE (BIG5HKSCS)
55};
56#define nmodules (sizeof (modules) / sizeof (modules[0]))
57
58
59/* The test data. */
60static const char inbuf[] =
61"The first step is the function to create a handle.\n"
62"\n"
63" - Function: iconv_t iconv_open (const char *TOCODE, const char\n"
64" *FROMCODE)\n"
65" The `iconv_open' function has to be used before starting a\n"
66" conversion. The two parameters this function takes determine the\n"
67" source and destination character set for the conversion and if the\n"
68" implementation has the possibility to perform such a conversion the\n"
69" function returns a handle.\n"
70"\n"
71" If the wanted conversion is not available the function returns\n"
72" `(iconv_t) -1'. In this case the global variable `errno' can have\n"
73" the following values:\n"
74"\n"
75" `EMFILE'\n"
76" The process already has `OPEN_MAX' file descriptors open.\n"
77"\n"
78" `ENFILE'\n"
79" The system limit of open file is reached.\n"
80"\n"
81" `ENOMEM'\n"
82" Not enough memory to carry out the operation.\n"
83"\n"
84" `EINVAL'\n"
85" The conversion from FROMCODE to TOCODE is not supported.\n"
86"\n"
87" It is not possible to use the same descriptor in different threads\n"
88" to perform independent conversions. Within the data structures\n"
89" associated with the descriptor there is information about the\n"
90" conversion state. This must not be messed up by using it in\n"
91" different conversions.\n"
92"\n"
93" An `iconv' descriptor is like a file descriptor as for every use a\n"
94" new descriptor must be created. The descriptor does not stand for\n"
95" all of the conversions from FROMSET to TOSET.\n"
96"\n"
97" The GNU C library implementation of `iconv_open' has one\n"
98" significant extension to other implementations. To ease the\n"
99" extension of the set of available conversions the implementation\n"
100" allows storing the necessary files with data and code in\n"
101" arbitrarily many directories. How this extension has to be\n"
102" written will be explained below (*note glibc iconv\n"
103" Implementation::). Here it is only important to say that all\n"
104" directories mentioned in the `GCONV_PATH' environment variable are\n"
105" considered if they contain a file `gconv-modules'. These\n"
106" directories need not necessarily be created by the system\n"
107" administrator. In fact, this extension is introduced to help users\n"
108" writing and using their own, new conversions. Of course this does\n"
109" not work for security reasons in SUID binaries; in this case only\n"
110" the system directory is considered and this normally is\n"
111" `PREFIX/lib/gconv'. The `GCONV_PATH' environment variable is\n"
112" examined exactly once at the first call of the `iconv_open'\n"
113" function. Later modifications of the variable have no effect.\n";
114
115
116static int
117do_test (void)
118{
119 size_t count = TEST_ROUNDS;
120 int result = 0;
121
122 mtrace ();
123
124 /* Just a seed. */
125 srandom (TEST_ROUNDS);
126
127 while (count--)
128 {
129 int idx = random () % nmodules;
130
131 if (modules[idx].state == unloaded)
132 {
133 char outbuf[10000];
134 char *inptr = (char *) inbuf;
135 size_t insize = sizeof (inbuf) - 1;
136 char *outptr = outbuf;
137 size_t outsize = sizeof (outbuf);
138
139 /* Load the module and do the conversion. */
140 modules[idx].cd = iconv_open (tocode: "UTF-8", fromcode: modules[idx].name);
141
142 if (modules[idx].cd == (iconv_t) -1)
143 {
144 printf (format: "opening of %s failed: %m\n", modules[idx].name);
145 result = 1;
146 break;
147 }
148
149 modules[idx].state = loaded;
150
151 /* Now a simple test. */
152 if (iconv (cd: modules[idx].cd, inbuf: &inptr, inbytesleft: &insize, outbuf: &outptr, outbytesleft: &outsize) != 0
153 || *inptr != '\0')
154 {
155 printf (format: "conversion with %s failed\n", modules[idx].name);
156 result = 1;
157 }
158 }
159 else
160 {
161 /* Unload the module. */
162 if (iconv_close (cd: modules[idx].cd) != 0)
163 {
164 printf (format: "closing of %s failed: %m\n", modules[idx].name);
165 result = 1;
166 break;
167 }
168
169 modules[idx].state = unloaded;
170 }
171 }
172
173 for (count = 0; count < nmodules; ++count)
174 if (modules[count].state == loaded && iconv_close (cd: modules[count].cd) != 0)
175 {
176 printf (format: "closing of %s failed: %m\n", modules[count].name);
177 result = 1;
178 }
179
180 return result;
181}
182
183#define TIMEOUT 30
184#define TEST_FUNCTION do_test ()
185#include "../test-skeleton.c"
186

source code of glibc/iconvdata/tst-loading.c