Created student weenix repository

1 files changed, 84 insertions, 0 deletions

diff --git a/user/usr/bin/tests/forkbomb.c b/user/usr/bin/tests/forkbomb.c
new file mode 100644
index 0000000..543990c
--- /dev/null
+++ b/user/usr/bin/tests/forkbomb.c
@@ -0,0 +1,84 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/* TODO add options for different ways of forkbombing
+   (kind of low priority but would be fun) */
+
+int main(int argc, char **argv)
+{
+    int n = 1;
+    pid_t pid;
+
+    open("/dev/tty0", O_RDONLY, 0);
+    open("/dev/tty0", O_WRONLY, 0);
+    printf("Forking up a storm!\n");
+    printf("If this runs for 10 minutes without crashing, then you ");
+    printf("probably aren't \nleaking resources\n");
+
+    if (fork())
+    {
+        for (;;)
+        {
+            printf("Fork number : %d\n", n);
+            if ((pid = fork()))
+            {
+                if (pid == -1)
+                {
+                    printf("Fork %d failed. Forkbomb stopping.\n", n);
+                    exit(1);
+                }
+                int status;
+                sched_yield();
+                wait(&status);
+                if (status != 0)
+                {
+                    printf("Test failed. Child exit with status %d\n", status);
+                    exit(1);
+                }
+            }
+            else
+            {
+                int a = 0;
+                sched_yield();
+                exit(0);
+            }
+            n++;
+        }
+    }
+
+#if 0
+// Old forkbomb 
+    if (!fork())
+    {
+        for (;;)
+        {
+            printf("I am fork number %d\n", n);
+            if ((pid = fork()))
+            {
+                if (-1 != pid)
+                {
+                    exit(0);
+                }
+                else
+                {
+                    printf(
+                        "%d-th fork failed. "
+                        "forkbomb stopping.",
+                        n);
+                    exit(1);
+                }
+            }
+            ++n;
+        }
+    }
+    else
+    {
+        int status;
+        while (wait(&status) > 0)
+            ;
+    }
+#endif
+    return 0;
+}