signalTimer

commit 76e6fc4ed6ebd399bdeea95c62a921ae6cb51f65
parent fd7152bda1826962040ae10913ed482a523b19af
Author: Remy Noulin <loader2x@gmail.com>
Date:   Sun, 16 Sep 2018 09:23:17 +0200

call old sigaction when SIGALRM triggers

package.yml   | 2 +-
signalTimer.c | 5 ++++-
2 files changed, 5 insertions(+), 2 deletions(-)

Diffstat:
M
package.yml
 | 
2
+-
M
signalTimer.c
 | 
5
++++-

2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/package.yml b/package.yml
@@ -1,6 +1,6 @@
 ---
   name: signalTimer
-  version: 0.0.3
+  version: 0.0.4
   description: "simple timer using SIGALARM"
   bin: ./signalTimer.c
   repository:
diff --git a/signalTimer.c b/signalTimer.c
@@ -40,6 +40,7 @@ internal void alarmSigaction(int signal, siginfo_t *si, void *arg);
 
 static struct itimerval it_val;
 
+internal struct sigaction oldsa;
 
 void initiateSignalTimer(signalTimert *self) {
 
@@ -58,7 +59,7 @@ void initiateSignalTimer(signalTimert *self) {
   sigemptyset(&sa.sa_mask);
   sa.sa_sigaction = alarmSigaction;
   sa.sa_flags   = SA_SIGINFO;
-  pTestErrorCmd(sigaction(SIGALRM, &sa, NULL) != 0, XFAILURE);
+  pTestErrorCmd(sigaction(SIGALRM, &sa, &oldsa) != 0, XFAILURE);
 
 }
 
@@ -200,6 +201,8 @@ internal void setIntervalSignalTimer(signalTimert *self, u64 interval) {
 
 internal void alarmSigaction(int signal, siginfo_t *si, void *arg) {
   theSignalTimerAddr->callback(theSignalTimerAddr->args);
+  if (oldsa.sa_sigaction) oldsa.sa_sigaction(signal, si, arg);
+  if (oldsa.sa_handler) oldsa.sa_handler(signal);
 }
 
 /* TODO add method implementations */