/** Add a signal to the event engine. * @param[in] sig Signal to add to engine. */ static void engine_signal(struct Signal* sig) { struct kevent sigevent; struct sigaction act; assert(0 != signal); Debug((DEBUG_ENGINE, "kqueue: Adding filter for signal %d [%p]", sig_signal(sig), sig)); sigevent.ident = sig_signal(sig); /* set up the kqueue event */ sigevent.filter = EVFILT_SIGNAL; /* looking for signals... */ sigevent.flags = EV_ADD | EV_ENABLE; /* add and enable it */ sigevent.fflags = 0; sigevent.data = 0; sigevent.udata = sig; /* store our user data */ if (kevent(kqueue_id, &sigevent, 1, 0, 0, 0) < 0) { /* add event */ log_write(LS_SYSTEM, L_WARNING, 0, "Unable to trap signal %d", sig_signal(sig)); return; } act.sa_handler = SIG_IGN; /* ignore the signal */ act.sa_flags = 0; sigemptyset(&act.sa_mask); sigaction(sig_signal(sig), &act, 0); }
static void CloseConnection(int signo) { /* NOTE, these are manual, we've done a setsid() */ sig_signal(SIGINT, SIG_IGN); log_Printf(LogPHASE, "Caught signal %d, abort connection(s)\n", signo); bundle_Down(SignalBundle, CLOSE_STAYDOWN); sig_signal(SIGINT, CloseConnection); }
/** Signal callback for SIGTERM. * @param[in] ev Signal event descriptor. */ static void sigterm_callback(struct Event* ev) { assert(0 != ev_signal(ev)); assert(ET_SIGNAL == ev_type(ev)); assert(SIGTERM == sig_signal(ev_signal(ev))); assert(SIGTERM == ev_data(ev)); exit_schedule(0, 0, 0, "Received signal SIGTERM"); }
/** Signal callback for SIGINT. * @param[in] ev Signal event descriptor. */ static void sigint_callback(struct Event* ev) { assert(0 != ev_signal(ev)); assert(ET_SIGNAL == ev_type(ev)); assert(SIGINT == sig_signal(ev_signal(ev))); assert(SIGINT == ev_data(ev)); exit_schedule(1, 0, 0, "Received signal SIGINT"); }
static void sigint_callback(struct Event* ev) { assert(0 != ev_signal(ev)); assert(ET_SIGNAL == ev_type(ev)); assert(SIGINT == sig_signal(ev_signal(ev))); assert(SIGINT == ev_data(ev)); server_restart("caught signal: SIGINT"); }
static void sigterm_callback(struct Event* ev) { assert(0 != ev_signal(ev)); assert(ET_SIGNAL == ev_type(ev)); assert(SIGTERM == sig_signal(ev_signal(ev))); assert(SIGTERM == ev_data(ev)); server_die("received signal SIGTERM"); }
/** Signal callback for SIGHUP. * @param[in] ev Signal event descriptor. */ static void sighup_callback(struct Event* ev) { assert(0 != ev_signal(ev)); assert(ET_SIGNAL == ev_type(ev)); assert(SIGHUP == sig_signal(ev_signal(ev))); assert(SIGHUP == ev_data(ev)); ++SignalCounter.hup; rehash(&me, 1); }
void timer_TermService(void) { struct itimerval itimer; itimer.it_interval.tv_usec = itimer.it_interval.tv_sec = 0; itimer.it_value.tv_usec = itimer.it_value.tv_sec = 0; if (setitimer(ITIMER_REAL, &itimer, NULL) == -1) log_Printf(LogERROR, "Unable to set itimer (%s)\n", strerror(errno)); sig_signal(SIGALRM, SIG_IGN); }
void timer_InitService(int restart) { struct itimerval itimer; if (TimerList) { if (!restart) sig_signal(SIGALRM, (void (*)(int))TimerService); itimer.it_interval.tv_sec = 0; itimer.it_interval.tv_usec = 0; itimer.it_value.tv_sec = TimerList->rest / SECTICKS; itimer.it_value.tv_usec = (TimerList->rest % SECTICKS) * TICKUNIT; if (setitimer(ITIMER_REAL, &itimer, NULL) == -1) log_Printf(LogERROR, "Unable to set itimer (%s)\n", strerror(errno)); } }
int main(int argc, char **argv) { char *name; const char *lastlabel; int arg, f, holdfd[3], label; struct bundle *bundle; struct prompt *prompt; struct switches sw; probe_Init(); /* * We open 3 descriptors to ensure that STDIN_FILENO, STDOUT_FILENO and * STDERR_FILENO are always open. These are closed before DoLoop(), * but *after* we've avoided the possibility of erroneously closing * an important descriptor with close(STD{IN,OUT,ERR}_FILENO). */ if ((holdfd[0] = open(_PATH_DEVNULL, O_RDWR)) == -1) { fprintf(stderr, "Cannot open %s !\n", _PATH_DEVNULL); return 2; } for (f = 1; f < sizeof holdfd / sizeof *holdfd; f++) holdfd[f] = dup(holdfd[0]); name = strrchr(argv[0], '/'); log_Open(name ? name + 1 : argv[0]); #ifndef NONAT PacketAliasInit(); #endif label = ProcessArgs(argc, argv, &sw); /* * A FreeBSD & OpenBSD hack to dodge a bug in the tty driver that drops * output occasionally.... I must find the real reason some time. To * display the dodgy behaviour, comment out this bit, make yourself a large * routing table and then run ppp in interactive mode. The `show route' * command will drop chunks of data !!! */ if (sw.mode == PHYS_INTERACTIVE) { close(STDIN_FILENO); if (open(_PATH_TTY, O_RDONLY) != STDIN_FILENO) { fprintf(stderr, "Cannot open %s for input !\n", _PATH_TTY); return 2; } } /* Allow output for the moment (except in direct mode) */ if (sw.mode == PHYS_DIRECT) prompt = NULL; else SignalPrompt = prompt = prompt_Create(NULL, NULL, PROMPT_STD); ID0init(); if (ID0realuid() != 0) { char conf[200], *ptr; snprintf(conf, sizeof conf, "%s/%s", PPP_CONFDIR, CONFFILE); do { struct stat sb; if (stat(conf, &sb) == 0 && sb.st_mode & S_IWOTH) { log_Printf(LogALERT, "ppp: Access violation: Please protect %s\n", conf); return -1; } ptr = conf + strlen(conf)-2; while (ptr > conf && *ptr != '/') *ptr-- = '\0'; } while (ptr >= conf); } if (label < argc) for (arg = label; arg < argc; arg++) CheckLabel(argv[arg], prompt, sw.mode); else CheckLabel("default", prompt, sw.mode); if (!sw.quiet) prompt_Printf(prompt, "Working in %s mode\n", mode2Nam(sw.mode)); if ((bundle = bundle_Create(TUN_PREFIX, sw.mode, sw.unit)) == NULL) return EX_START; /* NOTE: We may now have changed argv[1] via a ``set proctitle'' */ if (prompt) { prompt->bundle = bundle; /* couldn't do it earlier */ if (!sw.quiet) prompt_Printf(prompt, "Using interface: %s\n", bundle->iface->name); } SignalBundle = bundle; bundle->NatEnabled = sw.nat; if (sw.nat) opt_enable(bundle, OPT_IFACEALIAS); if (system_Select(bundle, "default", CONFFILE, prompt, NULL) < 0) prompt_Printf(prompt, "Warning: No default entry found in config file.\n"); sig_signal(SIGHUP, CloseSession); sig_signal(SIGTERM, CloseSession); sig_signal(SIGINT, CloseConnection); sig_signal(SIGQUIT, CloseSession); sig_signal(SIGALRM, SIG_IGN); signal(SIGPIPE, SIG_IGN); if (sw.mode == PHYS_INTERACTIVE) sig_signal(SIGTSTP, TerminalStop); sig_signal(SIGUSR1, RestartServer); sig_signal(SIGUSR2, BringDownServer); lastlabel = argv[argc - 1]; for (arg = label; arg < argc; arg++) { /* In case we use LABEL or ``set enddisc label'' */ bundle_SetLabel(bundle, lastlabel); system_Select(bundle, argv[arg], CONFFILE, prompt, NULL); } if (label < argc) /* In case the last label did a ``load'' */ bundle_SetLabel(bundle, lastlabel); if (sw.mode == PHYS_AUTO && ncprange_family(&bundle->ncp.ipcp.cfg.peer_range) == AF_UNSPEC) { prompt_Printf(prompt, "You must ``set ifaddr'' with a peer address " "in auto mode.\n"); AbortProgram(EX_START); } if (sw.mode != PHYS_INTERACTIVE) { if (sw.mode != PHYS_DIRECT) { if (!sw.fg) { int bgpipe[2]; pid_t bgpid; if (sw.mode == PHYS_BACKGROUND && pipe(bgpipe)) { log_Printf(LogERROR, "pipe: %s\n", strerror(errno)); AbortProgram(EX_SOCK); } bgpid = fork(); if (bgpid == -1) { log_Printf(LogERROR, "fork: %s\n", strerror(errno)); AbortProgram(EX_SOCK); } if (bgpid) { char c = EX_NORMAL; int ret; if (sw.mode == PHYS_BACKGROUND) { close(bgpipe[1]); BGPid = bgpid; /* If we get a signal, kill the child */ signal(SIGHUP, KillChild); signal(SIGTERM, KillChild); signal(SIGINT, KillChild); signal(SIGQUIT, KillChild); /* Wait for our child to close its pipe before we exit */ while ((ret = read(bgpipe[0], &c, 1)) == 1) { switch (c) { case EX_NORMAL: if (!sw.quiet) { prompt_Printf(prompt, "PPP enabled\n"); log_Printf(LogPHASE, "Parent: PPP enabled\n"); } break; case EX_REDIAL: if (!sw.quiet) prompt_Printf(prompt, "Attempting redial\n"); continue; case EX_RECONNECT: if (!sw.quiet) prompt_Printf(prompt, "Attempting reconnect\n"); continue; default: prompt_Printf(prompt, "Child failed (%s)\n", ex_desc((int)c)); log_Printf(LogPHASE, "Parent: Child failed (%s)\n", ex_desc((int) c)); } break; } if (ret != 1) { prompt_Printf(prompt, "Child exit, no status.\n"); log_Printf(LogPHASE, "Parent: Child exit, no status.\n"); } close(bgpipe[0]); } return c; } else if (sw.mode == PHYS_BACKGROUND) { close(bgpipe[0]); bundle->notify.fd = bgpipe[1]; } bundle_ChangedPID(bundle); bundle_LockTun(bundle); /* we have a new pid */ } /* -auto, -dedicated, -ddial, -foreground & -background */ prompt_Destroy(prompt, 0); close(STDOUT_FILENO); close(STDERR_FILENO); close(STDIN_FILENO); if (!sw.fg) setsid(); } else { /* -direct - STDIN_FILENO gets used by physical_Open */ prompt_TtyInit(NULL); close(STDOUT_FILENO); close(STDERR_FILENO); } } else { /* -interactive */ close(STDERR_FILENO); prompt_TtyInit(prompt); prompt_TtyCommandMode(prompt); prompt_Required(prompt); } /* We can get rid of these now */ for (f = 0; f < sizeof holdfd / sizeof *holdfd; f++) close(holdfd[f]); log_Printf(LogPHASE, "PPP Started (%s mode).\n", mode2Nam(sw.mode)); DoLoop(bundle); AbortProgram(EX_NORMAL); return EX_NORMAL; }
/* * Read all relevant header fields. * Returns 0 on success; 1 if there was an error or signal. */ PUBLIC int grabh(struct header *hp, int gflags) { sig_t volatile old_sigint; int retval; #ifndef USE_EDITLINE struct termios ttybuf; # if defined(TIOCSTI) && defined(TIOCEXT) int extproc; # endif if (save_erase_and_kill(&ttybuf)) return -1; # if defined(TIOCSTI) && defined(TIOCEXT) extproc = ((ttybuf.c_lflag & EXTPROC) ? 1 : 0); if (extproc) { int flag; flag = 0; if (ioctl(fileno(stdin), TIOCEXT, &flag) == -1) warn("TIOCEXT: off"); } # endif #endif /* USE_EDITLINE */ sig_check(); old_sigint = sig_signal(SIGINT, tty_sigint); /* return here if we detect a SIGINT */ if ((retval = setjmp(tty_jmpbuf)) != 0) { (void)putc('\n', stdout); goto out; } /* * Do this irrespective of whether the initial string is empty. * Otherwise, the editing is inconsistent. */ disable_erase_and_kill(&ttybuf); if (gflags & GTO) { hp->h_to = extract(readtty("To: ", detract(hp->h_to, 0)), GTO); } if (gflags & GSUBJECT) { hp->h_subject = readtty("Subject: ", hp->h_subject); } if (gflags & GCC) { hp->h_cc = extract(readtty("Cc: ", detract(hp->h_cc, 0)), GCC); } if (gflags & GBCC) { hp->h_bcc = extract(readtty("Bcc: ", detract(hp->h_bcc, 0)), GBCC); } if (gflags & GSMOPTS) { hp->h_smopts = shextract(readtty("Smopts: ", detract(hp->h_smopts, 0)), GSMOPTS); } #ifdef MIME_SUPPORT if (gflags & GSMOPTS) { /* XXX - Use a new flag for this? */ if (hp->h_attach) { struct attachment *ap; int i; i = 0; for (ap = hp->h_attach; ap; ap = ap->a_flink) i++; (void)printf("Attachment%s: %d\n", i > 1 ? "s" : "", i); } } #endif out: restore_erase_and_kill(&ttybuf); #ifndef USE_EDITLINE # if defined(TIOCSTI) && defined(TIOCEXT) if (extproc) { int flag; flag = 1; if (ioctl(fileno(stdin), TIOCEXT, &flag) == -1) warn("TIOCEXT: on"); } # endif #endif (void)sig_signal(SIGINT, old_sigint); sig_check(); return retval; }