First commit

content/progsys/TDM_4-les_signaux/src/q1.c

@@ -0,0 +1,21 @@
+#include <signal.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+int i;
+
+void signal_sigint(){
+    printf("value : %d\n",i);
+    //exit(EXIT_SUCCESS);
+}
+
+int main () {
+    if((signal(SIGINT,signal_sigint)) == SIG_ERR){
+        perror("unable to catch signal");
+    }
+    for (i=0; i<1000000; i++) {
+        sleep(0.01);
+    }
+}
+

content/progsys/TDM_4-les_signaux/src/q2.c

@@ -0,0 +1,45 @@
+#include <signal.h>
+#include <sys/wait.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#define PAUSE 60
+#define CHILDREN 2
+int pids[CHILDREN];
+
+void signal_sigterm () {
+    for(int i=0; i<CHILDREN; i++){
+        // do nothing if whe are in childs
+        if (pids[i] > 0) {
+            if ((kill(pids[i],15)) == -1){
+                perror("Error in signal catch\n");
+            }
+            printf("Sending SIGTERM to child %d\n", pids[i]);
+        }
+        else{
+            printf("\tKilling me\n");
+            exit(EXIT_SUCCESS);
+        }
+    }
+}
+
+int main( int argc, char **argv){
+       printf("Starting father with pid %d\n", getpid());
+    int status;
+    for (int i=0;i<CHILDREN;i++){
+        pids[i] = fork();
+        if (pids[i] == 0) {
+            sleep(PAUSE);
+            exit(EXIT_SUCCESS);
+        }
+        else {
+            printf ("Starting child with pid : %d\n", pids[i]);
+        }
+    }
+    if((signal(SIGTERM,signal_sigterm)) == SIG_ERR){
+        perror("unable to catch signal");
+    }
+    waitpid(-1, &status,0);
+    exit(EXIT_SUCCESS);
+}