1/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22#include "uv.h"
23#include "internal.h"
24
25#include <dlfcn.h>
26#include <errno.h>
27#include <string.h>
28#include <locale.h>
29
30static int uv__dlerror(uv_lib_t* lib);
31
32
33int uv_dlopen(const char* filename, uv_lib_t* lib) {
34 dlerror(); /* Reset error status. */
35 lib->errmsg = NULL;
36 lib->handle = dlopen(filename, RTLD_LAZY);
37 return lib->handle ? 0 : uv__dlerror(lib);
38}
39
40
41void uv_dlclose(uv_lib_t* lib) {
42 uv__free(lib->errmsg);
43 lib->errmsg = NULL;
44
45 if (lib->handle) {
46 /* Ignore errors. No good way to signal them without leaking memory. */
47 dlclose(lib->handle);
48 lib->handle = NULL;
49 }
50}
51
52
53int uv_dlsym(uv_lib_t* lib, const char* name, void** ptr) {
54 dlerror(); /* Reset error status. */
55 *ptr = dlsym(lib->handle, name);
56 return uv__dlerror(lib);
57}
58
59
60const char* uv_dlerror(const uv_lib_t* lib) {
61 return lib->errmsg ? lib->errmsg : "no error";
62}
63
64
65static int uv__dlerror(uv_lib_t* lib) {
66 const char* errmsg;
67
68 uv__free(lib->errmsg);
69
70 errmsg = dlerror();
71
72 if (errmsg) {
73 lib->errmsg = uv__strdup(errmsg);
74 return -1;
75 }
76 else {
77 lib->errmsg = NULL;
78 return 0;
79 }
80}
81