made parent kill childeren

fork_bomb/fork_bomb.c

@@ -7,7 +7,6 @@
 #include <ctype.h>
 #include <time.h>
 #include <signal.h>
-#include <sys/prctl.h>
 
 
 #define DEFAULT_NUM_LEN 512
@@ -202,6 +201,36 @@ static long read_self_ticks(void) {
   return utime + stime;
 }
 
+static void kill_children_of(pid_t ppid) {
+  DIR *dir = opendir("/proc");
+  if (!dir) {
+    return;
+  }
+  struct dirent *ent;
+  while ((ent = readdir(dir)) != NULL) {
+    if (ent->d_type != DT_DIR || !is_numeric_dir(ent->d_name)) {
+      continue;
+    }
+    char path[256];
+    snprintf(path, sizeof(path), "/proc/%s/stat", ent->d_name);
+    FILE *f = fopen(path, "r");
+    if (!f) {
+      continue;
+    }
+    long pid = 0;
+    long parent = 0;
+    char comm[256];
+    char state = 0;
+    if (fscanf(f, "%ld (%255[^)]) %c %ld", &pid, comm, &state, &parent) == 4) {
+      if (parent == (long)ppid) {
+        kill((pid_t)pid, SIGKILL);
+      }
+    }
+    fclose(f);
+  }
+  closedir(dir);
+}
+
 static void read_cpu_total(long *total, long *idle) {
   FILE *f = fopen("/proc/stat", "r");
   if (!f) {
@@ -289,12 +318,6 @@ int main(void)
     }
 
     if (pid == 0) {
-      if (prctl(PR_SET_PDEATHSIG, SIGKILL) != 0) {
-        _exit(1);
-      }
-      if (getppid() == 1) {
-        _exit(0);
-      }
       pause();
       return 0;
     }
@@ -359,6 +382,8 @@ int main(void)
     }
   }
 
+  kill_children_of(getpid());
+
   fclose(csv);
 
   return 0;