2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
61 #include <openssl/dso.h>
64 DSO_METHOD *DSO_METHOD_dlfcn(void)
74 /* Part of the hack in "dlfcn_load" ... */
75 #define DSO_MAX_TRANSLATED_SIZE 256
77 static int dlfcn_load(DSO *dso, const char *filename);
78 static int dlfcn_unload(DSO *dso);
79 static int dlfcn_bind(DSO *dso, const char *symname, void **symptr);
81 static int dlfcn_unbind(DSO *dso, char *symname, void *symptr);
82 static int dlfcn_init(DSO *dso);
83 static int dlfcn_finish(DSO *dso);
85 static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg);
87 static DSO_METHOD dso_meth_dlfcn = {
88 "OpenSSL 'dlfcn' shared library method",
92 /* For now, "unbind" doesn't exist */
101 DSO_METHOD *DSO_METHOD_dlfcn(void)
103 return(&dso_meth_dlfcn);
106 /* For this DSO_METHOD, our meth_data STACK will contain;
107 * (i) the handle (void*) returned from dlopen().
110 static int dlfcn_load(DSO *dso, const char *filename)
113 char translated[DSO_MAX_TRANSLATED_SIZE];
116 /* NB: This is a hideous hack, but I'm not yet sure what
117 * to replace it with. This attempts to convert any filename,
118 * that looks like it has no path information, into a
119 * translated form, e. "blah" -> "libblah.so" */
120 len = strlen(filename);
121 if((dso->flags & DSO_FLAG_NAME_TRANSLATION) &&
122 (len + 6 < DSO_MAX_TRANSLATED_SIZE) &&
123 (strstr(filename, "/") == NULL))
125 sprintf(translated, "lib%s.so", filename);
126 ptr = dlopen(translated, RTLD_NOW);
130 ptr = dlopen(filename, RTLD_NOW);
134 DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
137 if(!sk_push(dso->meth_data, (char *)ptr))
139 DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR);
146 static int dlfcn_unload(DSO *dso)
151 DSOerr(DSO_F_DLFCN_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
154 if(sk_num(dso->meth_data) < 1)
156 ptr = (void *)sk_pop(dso->meth_data);
159 DSOerr(DSO_F_DLFCN_UNLOAD,DSO_R_NULL_HANDLE);
160 /* Should push the value back onto the stack in
161 * case of a retry. */
162 sk_push(dso->meth_data, (char *)ptr);
165 /* For now I'm not aware of any errors associated with dlclose() */
170 static int dlfcn_bind(DSO *dso, const char *symname, void **symptr)
174 if((dso == NULL) || (symptr == NULL) || (symname == NULL))
176 DSOerr(DSO_F_DLFCN_BIND,ERR_R_PASSED_NULL_PARAMETER);
179 if(sk_num(dso->meth_data) < 1)
181 DSOerr(DSO_F_DLFCN_BIND,DSO_R_STACK_ERROR);
184 ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
187 DSOerr(DSO_F_DLFCN_BIND,DSO_R_NULL_HANDLE);
190 sym = dlsym(ptr, symname);
193 DSOerr(DSO_F_DLFCN_BIND,DSO_R_SYM_FAILURE);
200 static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg)
204 DSOerr(DSO_F_DLFCN_CTRL,ERR_R_PASSED_NULL_PARAMETER);
209 case DSO_CTRL_GET_FLAGS:
211 case DSO_CTRL_SET_FLAGS:
212 dso->flags = (int)larg;
214 case DSO_CTRL_OR_FLAGS:
215 dso->flags |= (int)larg;
220 DSOerr(DSO_F_DLFCN_CTRL,DSO_R_UNKNOWN_COMMAND);
224 #endif /* DSO_DLFCN */