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2d99476b PMF |
1 | /* Copyright (C) 2009 Pierre-Marc Fournier |
2 | * | |
3 | * This library is free software; you can redistribute it and/or | |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public | |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <dlfcn.h> | |
20 | #include <unistd.h> | |
21 | #include <stdio.h> | |
22 | ||
23 | pid_t fork(void) | |
24 | { | |
25 | static pid_t (*plibc_func)(void) = NULL; | |
26 | ||
27 | pid_t retval; | |
28 | ||
29 | if(plibc_func == NULL) { | |
30 | plibc_func = dlsym(RTLD_NEXT, "fork"); | |
31 | if(plibc_func == NULL) { | |
32 | fprintf(stderr, "libcwrap: unable to find fork\n"); | |
33 | return NULL; | |
34 | } | |
35 | } | |
36 | ||
2d99476b PMF |
37 | retval = plibc_func(); |
38 | ||
39 | if(retval == 0) | |
40 | ust_fork(); | |
41 | ||
42 | return retval; | |
43 | } |