2 * Helper header for LD_PRELOAD related headers macros. Must be loaded _first_
5 * Copyright (C) 2012-2013 Simon Ruderich
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 /* Necessary for RTLD_NEXT. */
33 /* Load the function name using dlsym() if necessary and store it in pointer.
34 * Terminate program on failure. */
35 #define DLSYM_FUNCTION(pointer, name) \
36 if (NULL == (pointer)) { \
38 dlerror(); /* Clear possibly existing error. */ \
40 *(void **) (&(pointer)) = dlsym(RTLD_NEXT, (name)); \
42 if (NULL != (error = dlerror())) { \
43 /* Not much we can do. Most likely the other output functions \
44 * failed to load too. */ \