This change facilitates name translation for shared libraries. The
[openssl.git] / crypto / dso / dso_dlfcn.c
index c5db28f..cad1aed 100644 (file)
@@ -71,6 +71,9 @@ DSO_METHOD *DSO_METHOD_dlfcn(void)
 #include <dlfcn.h>
 #endif
 
+/* 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_unload(DSO *dso);
 static int dlfcn_bind(DSO *dso, const char *symname, void **symptr);
@@ -79,6 +82,7 @@ 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);
 
 static DSO_METHOD dso_meth_dlfcn = {
        "OpenSSL 'dlfcn' shared library method",
@@ -89,6 +93,7 @@ static DSO_METHOD dso_meth_dlfcn = {
 #if 0
        NULL, /* unbind */
 #endif
+       dlfcn_ctrl,
        NULL, /* init */
        NULL  /* finish */
        };
@@ -105,8 +110,25 @@ DSO_METHOD *DSO_METHOD_dlfcn(void)
 static int dlfcn_load(DSO *dso, const char *filename)
        {
        void *ptr;
+       char translated[DSO_MAX_TRANSLATED_SIZE];
+       int len;
 
-       ptr = dlopen(filename, RTLD_NOW);
+       /* 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))
+               {
+               sprintf(translated, "lib%s.so", filename);
+               ptr = dlopen(translated, RTLD_NOW);
+               }
+       else
+               {
+               ptr = dlopen(filename, RTLD_NOW);
+               }
        if(ptr == NULL)
                {
                DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
@@ -178,4 +200,28 @@ static int dlfcn_bind(DSO *dso, const char *symname, void **symptr)
        return(1);
        }
 
+static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg)
+       {
+       if(dso == NULL)
+               {
+               DSOerr(DSO_F_DLFCN_CTRL,ERR_R_PASSED_NULL_PARAMETER);
+               return(-1);
+               }
+       switch(cmd)
+               {
+       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_CTRL,DSO_R_UNKNOWN_COMMAND);
+       return(-1);
+       }
+
 #endif /* DSO_DLFCN */