-/* dso_dlfcn.c */
+/* dso_dlfcn.c -*- mode:C; c-file-style: "eay" -*- */
/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
* project 2000.
*/
/* Part of the hack in "dlfcn_load" ... */
#define DSO_MAX_TRANSLATED_SIZE 256
-static int dlfcn_load(DSO *dso, const char *filename);
+static int dlfcn_load(DSO *dso);
static int dlfcn_unload(DSO *dso);
-static int dlfcn_bind(DSO *dso, const char *symname, void **symptr);
+static void *dlfcn_bind_var(DSO *dso, const char *symname);
+static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname);
#if 0
static int dlfcn_unbind(DSO *dso, char *symname, void *symptr);
static int dlfcn_init(DSO *dso);
static int dlfcn_finish(DSO *dso);
-#endif
static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg);
+#endif
+static char *dlfcn_name_converter(DSO *dso, const char *filename);
+static char *dlfcn_merger(DSO *dso, const char *filespec1,
+ const char *filespec2);
static DSO_METHOD dso_meth_dlfcn = {
"OpenSSL 'dlfcn' shared library method",
dlfcn_load,
dlfcn_unload,
- dlfcn_bind,
+ dlfcn_bind_var,
+ dlfcn_bind_func,
/* For now, "unbind" doesn't exist */
#if 0
- NULL, /* unbind */
+ NULL, /* unbind_var */
+ NULL, /* unbind_func */
#endif
- dlfcn_ctrl,
+ NULL, /* ctrl */
+ dlfcn_name_converter,
+ dlfcn_merger,
NULL, /* init */
NULL /* finish */
};
return(&dso_meth_dlfcn);
}
+/* Prior to using the dlopen() function, we should decide on the flag
+ * we send. There's a few different ways of doing this and it's a
+ * messy venn-diagram to match up which platforms support what. So
+ * as we don't have autoconf yet, I'm implementing a hack that could
+ * be hacked further relatively easily to deal with cases as we find
+ * them. Initially this is to cope with OpenBSD. */
+#if defined(__OpenBSD__) || defined(__NetBSD__)
+# ifdef DL_LAZY
+# define DLOPEN_FLAG DL_LAZY
+# else
+# ifdef RTLD_NOW
+# define DLOPEN_FLAG RTLD_NOW
+# else
+# define DLOPEN_FLAG 0
+# endif
+# endif
+#else
+# define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
+#endif
+
/* For this DSO_METHOD, our meth_data STACK will contain;
* (i) the handle (void*) returned from dlopen().
*/
-static int dlfcn_load(DSO *dso, const char *filename)
+static int dlfcn_load(DSO *dso)
{
- void *ptr;
- char translated[DSO_MAX_TRANSLATED_SIZE];
- int len;
+ void *ptr = NULL;
+ /* See applicable comments in dso_dl.c */
+ char *filename = DSO_convert_filename(dso, NULL);
+ int flags = DLOPEN_FLAG;
- /* NB: This is a hideous hack, but I'm not yet sure what
- * to replace it with. This attempts to convert any filename,
- * that looks like it has no path information, into a
- * translated form, e. "blah" -> "libblah.so" */
- len = strlen(filename);
- if((dso->flags & DSO_FLAG_NAME_TRANSLATION) &&
- (len + 6 < DSO_MAX_TRANSLATED_SIZE) &&
- (strstr(filename, "/") == NULL))
+ if(filename == NULL)
{
- sprintf(translated, "lib%s.so", filename);
- ptr = dlopen(translated, RTLD_NOW);
- }
- else
- {
- ptr = dlopen(filename, RTLD_NOW);
+ DSOerr(DSO_F_DLFCN_LOAD,DSO_R_NO_FILENAME);
+ goto err;
}
+
+#ifdef RTLD_GLOBAL
+ if (dso->flags & DSO_FLAG_GLOBAL_SYMBOLS)
+ flags |= RTLD_GLOBAL;
+#endif
+ ptr = dlopen(filename, flags);
if(ptr == NULL)
{
DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
- return(0);
+ ERR_add_error_data(4, "filename(", filename, "): ", dlerror());
+ goto err;
}
if(!sk_push(dso->meth_data, (char *)ptr))
{
DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR);
- dlclose(ptr);
- return(0);
+ goto err;
}
+ /* Success */
+ dso->loaded_filename = filename;
return(1);
- }
+err:
+ /* Cleanup! */
+ if(filename != NULL)
+ OPENSSL_free(filename);
+ if(ptr != NULL)
+ dlclose(ptr);
+ return(0);
+}
static int dlfcn_unload(DSO *dso)
{
return(0);
}
if(sk_num(dso->meth_data) < 1)
- {
- DSOerr(DSO_F_DLFCN_UNLOAD,DSO_R_STACK_ERROR);
- return(0);
- }
+ return(1);
ptr = (void *)sk_pop(dso->meth_data);
if(ptr == NULL)
{
return(1);
}
-static int dlfcn_bind(DSO *dso, const char *symname, void **symptr)
+static void *dlfcn_bind_var(DSO *dso, const char *symname)
{
void *ptr, *sym;
- if((dso == NULL) || (symptr == NULL) || (symname == NULL))
+ if((dso == NULL) || (symname == NULL))
{
- DSOerr(DSO_F_DLFCN_BIND,ERR_R_PASSED_NULL_PARAMETER);
- return(0);
+ DSOerr(DSO_F_DLFCN_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
+ return(NULL);
}
if(sk_num(dso->meth_data) < 1)
{
- DSOerr(DSO_F_DLFCN_BIND,DSO_R_STACK_ERROR);
- return(0);
+ DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_STACK_ERROR);
+ return(NULL);
}
ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
if(ptr == NULL)
{
- DSOerr(DSO_F_DLFCN_BIND,DSO_R_NULL_HANDLE);
- return(0);
+ DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_NULL_HANDLE);
+ return(NULL);
}
sym = dlsym(ptr, symname);
if(sym == NULL)
{
- DSOerr(DSO_F_DLFCN_BIND,DSO_R_SYM_FAILURE);
- return(0);
+ DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_SYM_FAILURE);
+ ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
+ return(NULL);
}
- *symptr = sym;
- return(1);
+ return(sym);
}
-static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg)
+static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname)
{
- if(dso == NULL)
+ void *ptr;
+ DSO_FUNC_TYPE sym;
+
+ if((dso == NULL) || (symname == NULL))
{
- DSOerr(DSO_F_DLFCN_CTRL,ERR_R_PASSED_NULL_PARAMETER);
- return(-1);
+ DSOerr(DSO_F_DLFCN_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
+ return(NULL);
}
- switch(cmd)
+ if(sk_num(dso->meth_data) < 1)
{
- case DSO_CTRL_GET_FLAGS:
- return dso->flags;
- case DSO_CTRL_SET_FLAGS:
- dso->flags = (int)larg;
- return(0);
- case DSO_CTRL_OR_FLAGS:
- dso->flags |= (int)larg;
- return(0);
- default:
- break;
+ DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_STACK_ERROR);
+ return(NULL);
}
- DSOerr(DSO_F_DLFCN_CTRL,DSO_R_UNKNOWN_COMMAND);
- return(-1);
+ ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
+ if(ptr == NULL)
+ {
+ DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_NULL_HANDLE);
+ return(NULL);
+ }
+ sym = (DSO_FUNC_TYPE)dlsym(ptr, symname);
+ if(sym == NULL)
+ {
+ DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_SYM_FAILURE);
+ ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
+ return(NULL);
+ }
+ return(sym);
+ }
+
+static char *dlfcn_merger(DSO *dso, const char *filespec1,
+ const char *filespec2)
+ {
+ char *merged;
+
+ if(!filespec1 && !filespec2)
+ {
+ DSOerr(DSO_F_DLFCN_MERGER,
+ ERR_R_PASSED_NULL_PARAMETER);
+ return(NULL);
+ }
+ /* If the first file specification is a rooted path, it rules.
+ same goes if the second file specification is missing. */
+ if (!filespec2 || filespec1[0] == '/')
+ {
+ merged = OPENSSL_malloc(strlen(filespec1) + 1);
+ if(!merged)
+ {
+ DSOerr(DSO_F_DLFCN_MERGER,
+ ERR_R_MALLOC_FAILURE);
+ return(NULL);
+ }
+ strcpy(merged, filespec1);
+ }
+ /* If the first file specification is missing, the second one rules. */
+ else if (!filespec1)
+ {
+ merged = OPENSSL_malloc(strlen(filespec2) + 1);
+ if(!merged)
+ {
+ DSOerr(DSO_F_DLFCN_MERGER,
+ ERR_R_MALLOC_FAILURE);
+ return(NULL);
+ }
+ strcpy(merged, filespec2);
+ }
+ else
+ /* This part isn't as trivial as it looks. It assumes that
+ the second file specification really is a directory, and
+ makes no checks whatsoever. Therefore, the result becomes
+ the concatenation of filespec2 followed by a slash followed
+ by filespec1. */
+ {
+ int spec2len, len;
+
+ spec2len = (filespec2 ? strlen(filespec2) : 0);
+ len = spec2len + (filespec1 ? strlen(filespec1) : 0);
+
+ if(filespec2 && filespec2[spec2len - 1] == '/')
+ {
+ spec2len--;
+ len--;
+ }
+ merged = OPENSSL_malloc(len + 2);
+ if(!merged)
+ {
+ DSOerr(DSO_F_DLFCN_MERGER,
+ ERR_R_MALLOC_FAILURE);
+ return(NULL);
+ }
+ strcpy(merged, filespec2);
+ merged[spec2len] = '/';
+ strcpy(&merged[spec2len + 1], filespec1);
+ }
+ return(merged);
+ }
+
+static char *dlfcn_name_converter(DSO *dso, const char *filename)
+ {
+ char *translated;
+ int len, rsize, transform;
+
+ len = strlen(filename);
+ rsize = len + 1;
+ transform = (strstr(filename, "/") == NULL);
+ if(transform)
+ {
+ /* We will convert this to "%s.so" or "lib%s.so" */
+ rsize += 3; /* The length of ".so" */
+ if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+ rsize += 3; /* The length of "lib" */
+ }
+ translated = OPENSSL_malloc(rsize);
+ if(translated == NULL)
+ {
+ DSOerr(DSO_F_DLFCN_NAME_CONVERTER,
+ DSO_R_NAME_TRANSLATION_FAILED);
+ return(NULL);
+ }
+ if(transform)
+ {
+ if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+ sprintf(translated, "lib%s.so", filename);
+ else
+ sprintf(translated, "%s.so", filename);
+ }
+ else
+ sprintf(translated, "%s", filename);
+ return(translated);
}
#endif /* DSO_DLFCN */
projects / openssl.git / blobdiff