#include <sigevent.h>
#include <log.h>
#include <memory.h>
+#include <lib_errors.h>
#ifdef SA_SIGINFO
#ifdef HAVE_UCONTEXT_H
/* master signals descriptor struct */
-struct quagga_sigevent_master_t
-{
- struct thread *t;
+struct quagga_sigevent_master_t {
+ struct thread *t;
+
+ struct quagga_signal_t *signals;
+ int sigc;
- struct quagga_signal_t *signals;
- int sigc;
-
- volatile sig_atomic_t caught;
+ volatile sig_atomic_t caught;
} sigmaster;
-/* Generic signal handler
+/* Generic signal handler
* Schedules signal event thread
*/
-static void
-quagga_signal_handler (int signo)
+static void quagga_signal_handler(int signo)
{
- int i;
- struct quagga_signal_t *sig;
-
- for (i = 0; i < sigmaster.sigc; i++)
- {
- sig = &(sigmaster.signals[i]);
-
- if (sig->signal == signo)
- sig->caught = 1;
- }
-
- sigmaster.caught = 1;
-}
+ int i;
+ struct quagga_signal_t *sig;
+
+ for (i = 0; i < sigmaster.sigc; i++) {
+ sig = &(sigmaster.signals[i]);
+
+ if (sig->signal == signo)
+ sig->caught = 1;
+ }
+
+ sigmaster.caught = 1;
+}
/* check if signals have been caught and run appropriate handlers */
-int
-quagga_sigevent_process (void)
+int quagga_sigevent_process(void)
{
- struct quagga_signal_t *sig;
- int i;
+ struct quagga_signal_t *sig;
+ int i;
#ifdef SIGEVENT_BLOCK_SIGNALS
- /* shouldnt need to block signals, but potentially may be needed */
- sigset_t newmask, oldmask;
-
- /*
- * Block most signals, but be careful not to defer SIGTRAP because
- * doing so breaks gdb, at least on NetBSD 2.0. Avoid asking to
- * block SIGKILL, just because we shouldn't be able to do so.
- */
- sigfillset (&newmask);
- sigdelset (&newmask, SIGTRAP);
- sigdelset (&newmask, SIGKILL);
-
- if ( (sigprocmask (SIG_BLOCK, &newmask, &oldmask)) < 0)
- {
- zlog_err ("quagga_signal_timer: couldnt block signals!");
- return -1;
- }
+ /* shouldnt need to block signals, but potentially may be needed */
+ sigset_t newmask, oldmask;
+
+ /*
+ * Block most signals, but be careful not to defer SIGTRAP because
+ * doing so breaks gdb, at least on NetBSD 2.0. Avoid asking to
+ * block SIGKILL, just because we shouldn't be able to do so.
+ */
+ sigfillset(&newmask);
+ sigdelset(&newmask, SIGTRAP);
+ sigdelset(&newmask, SIGKILL);
+
+ if ((sigprocmask(SIG_BLOCK, &newmask, &oldmask)) < 0) {
+ flog_err_sys(EC_LIB_SYSTEM_CALL,
+ "quagga_signal_timer: couldnt block signals!");
+ return -1;
+ }
#endif /* SIGEVENT_BLOCK_SIGNALS */
- if (sigmaster.caught > 0)
- {
- sigmaster.caught = 0;
- /* must not read or set sigmaster.caught after here,
- * race condition with per-sig caught flags if one does
- */
-
- for (i = 0; i < sigmaster.sigc; i++)
- {
- sig = &(sigmaster.signals[i]);
-
- if (sig->caught > 0)
- {
- sig->caught = 0;
- if (sig->handler)
- sig->handler ();
- }
- }
- }
+ if (sigmaster.caught > 0) {
+ sigmaster.caught = 0;
+ /* must not read or set sigmaster.caught after here,
+ * race condition with per-sig caught flags if one does
+ */
+
+ for (i = 0; i < sigmaster.sigc; i++) {
+ sig = &(sigmaster.signals[i]);
+
+ if (sig->caught > 0) {
+ sig->caught = 0;
+ if (sig->handler)
+ sig->handler();
+ }
+ }
+ }
#ifdef SIGEVENT_BLOCK_SIGNALS
- if ( sigprocmask (SIG_UNBLOCK, &oldmask, NULL) < 0 );
- return -1;
+ if (sigprocmask(SIG_UNBLOCK, &oldmask, NULL) < 0)
+ ;
+ return -1;
#endif /* SIGEVENT_BLOCK_SIGNALS */
- return 0;
+ return 0;
}
#ifdef SIGEVENT_SCHEDULE_THREAD
/* timer thread to check signals. Shouldnt be needed */
-int
-quagga_signal_timer (struct thread *t)
+int quagga_signal_timer(struct thread *t)
{
- struct quagga_sigevent_master_t *sigm;
- struct quagga_signal_t *sig;
- int i;
-
- sigm = THREAD_ARG (t);
- sigm->t = NULL;
- thread_add_timer(sigm->t->master, quagga_signal_timer, &sigmaster, QUAGGA_SIGNAL_TIMER_INTERVAL,
- &sigm->t);
- return quagga_sigevent_process ();
+ struct quagga_sigevent_master_t *sigm;
+
+ sigm = THREAD_ARG(t);
+ sigm->t = NULL;
+ thread_add_timer(sigm->t->master, quagga_signal_timer, &sigmaster,
+ QUAGGA_SIGNAL_TIMER_INTERVAL, &sigm->t);
+ return quagga_sigevent_process();
}
#endif /* SIGEVENT_SCHEDULE_THREAD */
/* Initialization of signal handles. */
/* Signal wrapper. */
-static int
-signal_set (int signo)
+static int signal_set(int signo)
{
- int ret;
- struct sigaction sig;
- struct sigaction osig;
-
- sig.sa_handler = &quagga_signal_handler;
- sigfillset (&sig.sa_mask);
- sig.sa_flags = 0;
- if (signo == SIGALRM) {
+ int ret;
+ struct sigaction sig;
+ struct sigaction osig;
+
+ sig.sa_handler = &quagga_signal_handler;
+ sigfillset(&sig.sa_mask);
+ sig.sa_flags = 0;
+ if (signo == SIGALRM) {
#ifdef SA_INTERRUPT
- sig.sa_flags |= SA_INTERRUPT; /* SunOS */
+ sig.sa_flags |= SA_INTERRUPT; /* SunOS */
#endif
- } else {
+ } else {
#ifdef SA_RESTART
- sig.sa_flags |= SA_RESTART;
+ sig.sa_flags |= SA_RESTART;
#endif /* SA_RESTART */
- }
+ }
- ret = sigaction (signo, &sig, &osig);
- if (ret < 0)
- return ret;
- else
- return 0;
+ ret = sigaction(signo, &sig, &osig);
+ if (ret < 0)
+ return ret;
+ else
+ return 0;
}
#ifdef SA_SIGINFO
/* XXX This function should be enhanced to support more platforms
(it currently works only on Linux/x86). */
-static void *
-program_counter(void *context)
+static void *program_counter(void *context)
{
#ifdef HAVE_UCONTEXT_H
#ifdef GNU_LINUX
- /* these are from GNU libc, rather than Linux, strictly speaking */
-# if defined(REG_EIP)
+/* these are from GNU libc, rather than Linux, strictly speaking */
+#if defined(REG_EIP)
# define REG_INDEX REG_EIP
-# elif defined(REG_RIP)
+#elif defined(REG_RIP)
# define REG_INDEX REG_RIP
-# elif defined(__powerpc__)
+#elif defined(__powerpc__)
# define REG_INDEX 32
-# endif
+#endif
#elif defined(SUNOS_5) /* !GNU_LINUX */
# define REG_INDEX REG_PC
-#endif /* GNU_LINUX */
+#endif /* GNU_LINUX */
#ifdef REG_INDEX
-# ifdef HAVE_UCONTEXT_T_UC_MCONTEXT_GREGS
+#ifdef HAVE_UCONTEXT_T_UC_MCONTEXT_GREGS
# define REGS gregs[REG_INDEX]
-# elif defined(HAVE_UCONTEXT_T_UC_MCONTEXT_UC_REGS)
+#elif defined(HAVE_UCONTEXT_T_UC_MCONTEXT_UC_REGS)
# define REGS uc_regs->gregs[REG_INDEX]
-# endif /* HAVE_UCONTEXT_T_UC_MCONTEXT_GREGS */
+#endif /* HAVE_UCONTEXT_T_UC_MCONTEXT_GREGS */
#endif /* REG_INDEX */
#ifdef REGS
- if (context)
- return (void *)(((ucontext_t *)context)->uc_mcontext.REGS);
-#elif defined(HAVE_UCONTEXT_T_UC_MCONTEXT_REGS__NIP)
- /* older Linux / struct pt_regs ? */
- if (context)
- return (void *)(((ucontext_t *)context)->uc_mcontext.regs->nip);
+ if (context)
+ return (void *)(((ucontext_t *)context)->uc_mcontext.REGS);
+#elif defined(HAVE_UCONTEXT_T_UC_MCONTEXT_REGS__NIP)
+ /* older Linux / struct pt_regs ? */
+ if (context)
+ return (void *)(((ucontext_t *)context)->uc_mcontext.regs->nip);
#endif /* REGS */
#endif /* HAVE_UCONTEXT_H */
- return NULL;
+ return NULL;
}
#endif /* SA_SIGINFO */
-static void __attribute__ ((noreturn))
+static void __attribute__((noreturn))
exit_handler(int signo
#ifdef SA_SIGINFO
- , siginfo_t *siginfo, void *context
+ ,
+ siginfo_t *siginfo, void *context
#endif
- )
+ )
{
- zlog_signal(signo, "exiting..."
+ zlog_signal(signo, "exiting..."
#ifdef SA_SIGINFO
- , siginfo, program_counter(context)
+ ,
+ siginfo, program_counter(context)
#endif
- );
- _exit(128+signo);
+ );
+ _exit(128 + signo);
}
-static void __attribute__ ((noreturn))
+static void __attribute__((noreturn))
core_handler(int signo
#ifdef SA_SIGINFO
- , siginfo_t *siginfo, void *context
+ ,
+ siginfo_t *siginfo, void *context
#endif
- )
+ )
{
- /* make sure we don't hang in here. default for SIGALRM is terminate.
- * - if we're in backtrace for more than a second, abort. */
- struct sigaction sa_default = { .sa_handler = SIG_DFL };
- sigaction (SIGALRM, &sa_default, NULL);
+ /* make sure we don't hang in here. default for SIGALRM is terminate.
+ * - if we're in backtrace for more than a second, abort. */
+ struct sigaction sa_default = {.sa_handler = SIG_DFL};
+ sigaction(SIGALRM, &sa_default, NULL);
- sigset_t sigset;
- sigemptyset (&sigset);
- sigaddset (&sigset, SIGALRM);
- sigprocmask (SIG_UNBLOCK, &sigset, NULL);
+ sigset_t sigset;
+ sigemptyset(&sigset);
+ sigaddset(&sigset, SIGALRM);
+ sigprocmask(SIG_UNBLOCK, &sigset, NULL);
- alarm (1);
+ alarm(1);
- zlog_signal(signo, "aborting..."
+ zlog_signal(signo, "aborting..."
#ifdef SA_SIGINFO
- , siginfo, program_counter(context)
+ ,
+ siginfo, program_counter(context)
#endif
- );
- /* dump memory stats on core */
- log_memstats_stderr ("core_handler");
- abort();
+ );
+ /* dump memory stats on core */
+ log_memstats(stderr, "core_handler");
+ abort();
}
-static void
-trap_default_signals(void)
+static void trap_default_signals(void)
{
- static const int core_signals[] = {
- SIGQUIT,
- SIGILL,
+ static const int core_signals[] = {
+ SIGQUIT, SIGILL,
#ifdef SIGEMT
- SIGEMT,
+ SIGEMT,
#endif
- SIGFPE,
- SIGBUS,
- SIGSEGV,
+ SIGFPE, SIGBUS, SIGSEGV,
#ifdef SIGSYS
- SIGSYS,
+ SIGSYS,
#endif
#ifdef SIGXCPU
- SIGXCPU,
+ SIGXCPU,
#endif
#ifdef SIGXFSZ
- SIGXFSZ,
+ SIGXFSZ,
#endif
- };
- static const int exit_signals[] = {
- SIGHUP,
- SIGINT,
- SIGALRM,
- SIGTERM,
- SIGUSR1,
- SIGUSR2,
+ };
+ static const int exit_signals[] = {
+ SIGHUP, SIGINT, SIGALRM, SIGTERM, SIGUSR1, SIGUSR2,
#ifdef SIGPOLL
- SIGPOLL,
+ SIGPOLL,
#endif
#ifdef SIGVTALRM
- SIGVTALRM,
+ SIGVTALRM,
#endif
#ifdef SIGSTKFLT
- SIGSTKFLT,
+ SIGSTKFLT,
#endif
- };
- static const int ignore_signals[] = {
- SIGPIPE,
- };
- static const struct {
- const int *sigs;
- u_int nsigs;
- void (*handler)(int signo
+ };
+ static const int ignore_signals[] = {
+ SIGPIPE,
+ };
+ static const struct {
+ const int *sigs;
+ unsigned int nsigs;
+ void (*handler)(int signo
#ifdef SA_SIGINFO
- , siginfo_t *info, void *context
+ ,
+ siginfo_t *info, void *context
#endif
- );
- } sigmap[] = {
- { core_signals, array_size(core_signals), core_handler},
- { exit_signals, array_size(exit_signals), exit_handler},
- { ignore_signals, array_size(ignore_signals), NULL},
- };
- u_int i;
-
- for (i = 0; i < array_size(sigmap); i++)
- {
- u_int j;
-
- for (j = 0; j < sigmap[i].nsigs; j++)
- {
- struct sigaction oact;
- if ((sigaction(sigmap[i].sigs[j],NULL,&oact) == 0) &&
- (oact.sa_handler == SIG_DFL))
- {
- struct sigaction act;
- sigfillset (&act.sa_mask);
- if (sigmap[i].handler == NULL)
- {
- act.sa_handler = SIG_IGN;
- act.sa_flags = 0;
- }
- else
- {
+ );
+ } sigmap[] = {
+ {core_signals, array_size(core_signals), core_handler},
+ {exit_signals, array_size(exit_signals), exit_handler},
+ {ignore_signals, array_size(ignore_signals), NULL},
+ };
+ unsigned int i;
+
+ for (i = 0; i < array_size(sigmap); i++) {
+ unsigned int j;
+
+ for (j = 0; j < sigmap[i].nsigs; j++) {
+ struct sigaction oact;
+ if ((sigaction(sigmap[i].sigs[j], NULL, &oact) == 0)
+ && (oact.sa_handler == SIG_DFL)) {
+ struct sigaction act;
+ sigfillset(&act.sa_mask);
+ if (sigmap[i].handler == NULL) {
+ act.sa_handler = SIG_IGN;
+ act.sa_flags = 0;
+ } else {
#ifdef SA_SIGINFO
- /* Request extra arguments to signal handler. */
- act.sa_sigaction = sigmap[i].handler;
- act.sa_flags = SA_SIGINFO;
+ /* Request extra arguments to signal
+ * handler. */
+ act.sa_sigaction = sigmap[i].handler;
+ act.sa_flags = SA_SIGINFO;
#else
- act.sa_handler = sigmap[i].handler;
- act.sa_flags = 0;
+ act.sa_handler = sigmap[i].handler;
+ act.sa_flags = 0;
#endif
#ifdef SA_RESETHAND
- /* don't try to print backtraces recursively */
- if (sigmap[i].handler == core_handler)
- act.sa_flags |= SA_RESETHAND;
+ /* don't try to print backtraces
+ * recursively */
+ if (sigmap[i].handler == core_handler)
+ act.sa_flags |= SA_RESETHAND;
#endif
- }
- if (sigaction(sigmap[i].sigs[j],&act,NULL) < 0)
- zlog_warn("Unable to set signal handler for signal %d: %s",
- sigmap[i].sigs[j],safe_strerror(errno));
-
- }
- }
- }
+ }
+ if (sigaction(sigmap[i].sigs[j], &act, NULL)
+ < 0)
+ flog_err(
+ EC_LIB_SYSTEM_CALL,
+ "Unable to set signal handler for signal %d: %s",
+ sigmap[i].sigs[j],
+ safe_strerror(errno));
+ }
+ }
+ }
}
-void
-signal_init (struct thread_master *m, int sigc,
- struct quagga_signal_t signals[])
+void signal_init(struct thread_master *m, int sigc,
+ struct quagga_signal_t signals[])
{
- int i = 0;
- struct quagga_signal_t *sig;
-
- /* First establish some default handlers that can be overridden by
- the application. */
- trap_default_signals();
-
- while (i < sigc)
- {
- sig = &signals[i];
- if ( signal_set (sig->signal) < 0 )
- exit (-1);
- i++;
- }
-
- sigmaster.sigc = sigc;
- sigmaster.signals = signals;
-
-#ifdef SIGEVENT_SCHEDULE_THREAD
- sigmaster.t = NULL;
- thread_add_timer(m, quagga_signal_timer, &sigmaster, QUAGGA_SIGNAL_TIMER_INTERVAL,
- &sigmaster.t);
+ int i = 0;
+ struct quagga_signal_t *sig;
+
+ /* First establish some default handlers that can be overridden by
+ the application. */
+ trap_default_signals();
+
+ while (i < sigc) {
+ sig = &signals[i];
+ if (signal_set(sig->signal) < 0)
+ exit(-1);
+ i++;
+ }
+
+ sigmaster.sigc = sigc;
+ sigmaster.signals = signals;
+
+#ifdef SIGEVENT_SCHEDULE_THREAD
+ sigmaster.t = NULL;
+ thread_add_timer(m, quagga_signal_timer, &sigmaster,
+ QUAGGA_SIGNAL_TIMER_INTERVAL, &sigmaster.t);
#endif /* SIGEVENT_SCHEDULE_THREAD */
}
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