#include #include #include #include void abort(void) /* POSIX-style abort() function */ { sigset_t mask; struct sigaction action; /* * Caller can't ignore SIGABRT, if so reset to default. */ sigaction(SIGABRT, NULL, &action); if (action.sa_handler == SIG_IGN) { action.sa_handler = SIG_DFL; sigaction(SIGABRT, &action, NULL); } if (action.sa_handler == SIG_DFL) fflush(NULL); /* flush all open stdio streams */ /* * Caller can't block SIGABRT; make sure it's unblocked. */ sigfillset(&mask); sigdelset(&mask, SIGABRT); /* mask has only SIGABRT turned off */ sigprocmask(SIG_SETMASK, &mask, NULL); kill(getpid(), SIGABRT); /* send the signal */ /* * If we're here, process caught SIGABRT and returned. */ fflush(NULL); /* flush all open stdio streams */ action.sa_handler = SIG_DFL; sigaction(SIGABRT, &action, NULL); /* reset to default */ sigprocmask(SIG_SETMASK, &mask, NULL); /* just in case ... */ kill(getpid(), SIGABRT); /* and one more time */ exit(1); /* this should never be executed ... */ }