Introduce para_sigaction().

[paraslash.git] / signal.c

diff --git a/signal.c b/signal.c
index acc87802b33a841f8f5d7f90b971ae97a3edc3b0..84f73fc8a9e373e7abdf6a6d7043f3c1be5e07b3 100644 (file)
--- a/signal.c
+++ b/signal.c
@@ -117,20 +117,51 @@ void para_reap_children(void)
 }
 
 /**
- * Wrapper around signal(2).
+ * Install the given handler for the given signal.
  *
  * \param sig The number of the signal to catch.
+ * \param handler to be installed, \p SIG_IGN, or \p SIG_DFL.
  *
- * This installs the generic signal handler for the given signal.
+ * \return This function returns 1 on success and \p -E_SIGNAL_SIG_ERR on
+ * errors.
  *
- * \return This function returns 1 on success and \p -E_SIGNAL_SIG_ERR on errors.
+ * \sa sigaction(2).
+ */
+int para_sigaction(int sig, void (*handler)(int))
+{
+       struct sigaction act;
+
+       PARA_DEBUG_LOG("catching signal %d\n", sig);
+       act.sa_handler = handler;
+       sigemptyset(&act.sa_mask);
+       act.sa_flags = 0;
+       if (sig == SIGALRM) {
+               #ifdef SA_INTERRUPT /* SunOS */
+                       act.sa_flags |= SA_INTERRUPT;
+               #endif
+       } else {
+               #ifdef SA_RESTART /* BSD */
+                       act.sa_flags |= SA_RESTART;
+               #endif
+       }
+       if (sigaction(sig, &act, NULL) < 0)
+               return -E_SIGNAL_SIG_ERR;
+       return 1;
+}
+
+/**
+ * Install the generic signal handler for the given signal number.
+ *
+ * \param sig The number of the signal to catch.
+ *
+ * \return This function returns 1 on success and \p -E_SIGNAL_SIG_ERR on
+ * errors.
  *
- * \sa signal(2).
+ * \sa signal(2), sigaction(2).
  */
 int para_install_sighandler(int sig)
 {
-       PARA_DEBUG_LOG("catching signal %d\n", sig);
-       return signal(sig, &generic_signal_handler) == SIG_ERR?  -E_SIGNAL_SIG_ERR : 1;
+       return para_sigaction(sig, &generic_signal_handler);
 }
 
 /**