131 lines
2.9 KiB
C
131 lines
2.9 KiB
C
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/*
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* Copyright © 2005 Novell, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Novell, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior permission.
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* Novell, Inc. makes no representations about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*
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* NOVELL, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
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* NO EVENT SHALL NOVELL, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: David Reveman <davidr@novell.com>
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*/
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#include "xgl.h"
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#include "xglmodule.h"
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#ifdef XGL_MODULAR
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#include <dlfcn.h>
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#define SYM(ptr, name) { (void **) &(ptr), (name) }
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void *
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xglLoadModule (const char *name,
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int flag)
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{
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ModuleVersionProcPtr moduleVersion;
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ModuleInitProcPtr moduleInit;
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void *handle = 0;
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char *module;
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xglSymbolRec mSym[] = {
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SYM (moduleVersion, "moduleVersion"),
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SYM (moduleInit, "moduleInit")
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};
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module = malloc (strlen (XGL_MODULE_PATH "/lib.so") + strlen (name) + 1);
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if (!module)
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return 0;
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sprintf (module, XGL_MODULE_PATH "/lib%s.so", name);
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handle = dlopen (module, flag);
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if (handle)
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{
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if (xglLookupSymbols (handle, mSym, sizeof (mSym) / sizeof (mSym[0])))
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{
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const char *version;
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version = (*moduleVersion) ();
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if (strcmp (VERSION, version) == 0)
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{
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if (!(*moduleInit) (module))
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{
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dlclose (handle);
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handle = 0;
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}
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}
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else
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{
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ErrorF ("Module version mismatch. "
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"%s is %s Xserver is" VERSION "\n",
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module, version);
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dlclose (handle);
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handle = 0;
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}
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}
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else
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{
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dlclose (handle);
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handle = 0;
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}
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}
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else
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ErrorF ("dlopen: %s\n", dlerror ());
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free (module);
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return handle;
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}
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void
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xglUnloadModule (void *handle)
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{
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dlclose (handle);
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}
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Bool
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xglLookupSymbols (void *handle,
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xglSymbolPtr sym,
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int nSym)
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{
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void *symbol;
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char *error;
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int i;
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/* avoid previous error */
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dlerror ();
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for (i = 0; i < nSym; i++)
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{
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symbol = dlsym (handle, sym[i].name);
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if (!symbol)
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{
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error = dlerror ();
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if (error != 0)
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ErrorF ("dlsym: %s: %s\n", sym[i].name, error);
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return FALSE;
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}
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*(sym[i].ptr) = symbol;
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}
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return TRUE;
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}
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#endif
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