| #include <sys/types.h> |
| #include <dlfcn.h> |
| #include <error.h> |
| #include <mcheck.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| pid_t pid, pid2; |
| |
| pid_t getpid(void) |
| { |
| pid_t (*f)(void); |
| f = (pid_t (*)(void)) dlsym (RTLD_NEXT, "getpid"); |
| if (f == NULL) |
| error (EXIT_FAILURE, 0, "dlsym (RTLD_NEXT, \"getpid\"): %s", dlerror ()); |
| return (pid2 = f()) + 26; |
| } |
| |
| int |
| main (void) |
| { |
| pid_t (*f)(void); |
| |
| mtrace (); |
| |
| f = (pid_t (*)(void)) dlsym (RTLD_DEFAULT, "getpid"); |
| if (f == NULL) |
| error (EXIT_FAILURE, 0, "dlsym (RTLD_DEFAULT, \"getpid\"): %s", dlerror ()); |
| pid = f(); |
| if (pid != pid2 + 26) |
| error (EXIT_FAILURE, 0, "main getpid() not called"); |
| return 0; |
| } |