1 | #include <sys/types.h> |
2 | #include <dlfcn.h> |
3 | #include <error.h> |
4 | #include <mcheck.h> |
5 | #include <stdlib.h> |
6 | #include <unistd.h> |
7 | |
8 | pid_t pid, pid2; |
9 | |
10 | pid_t getpid(void) |
11 | { |
12 | pid_t (*f)(void); |
13 | f = (pid_t (*)(void)) dlsym (RTLD_NEXT, name: "getpid" ); |
14 | if (f == NULL) |
15 | error (EXIT_FAILURE, errnum: 0, format: "dlsym (RTLD_NEXT, \"getpid\"): %s" , dlerror ()); |
16 | return (pid2 = f()) + 26; |
17 | } |
18 | |
19 | int |
20 | main (void) |
21 | { |
22 | pid_t (*f)(void); |
23 | |
24 | mtrace (); |
25 | |
26 | f = (pid_t (*)(void)) dlsym (RTLD_DEFAULT, name: "getpid" ); |
27 | if (f == NULL) |
28 | error (EXIT_FAILURE, errnum: 0, format: "dlsym (RTLD_DEFAULT, \"getpid\"): %s" , dlerror ()); |
29 | pid = f(); |
30 | if (pid != pid2 + 26) |
31 | error (EXIT_FAILURE, errnum: 0, format: "main getpid() not called" ); |
32 | return 0; |
33 | } |
34 | |