More tests.

[pintos-anon] / grading / userprog / multi-parent-fd.c

diff --git a/grading/userprog/multi-parent-fd.c b/grading/userprog/multi-parent-fd.c
new file mode 100644 (file)
index 0000000..4a8c89f
--- /dev/null
+++ b/grading/userprog/multi-parent-fd.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <string.h>
+#include <syscall.h>
+#include "sample.inc"
+
+char actual[sizeof sample];
+
+int
+main (void) 
+{
+  char child_cmd[128];
+  int byte_cnt;
+  int handle;
+
+  printf ("(multi-child-fd) begin\n");
+
+  handle = open("sample.txt");
+  if (handle < 2)
+    printf ("(multi-child-fd) fail: open() returned %d\n", handle);
+
+  snprintf (child_cmd, sizeof child_cmd, "child-close %d", handle);
+  
+  printf ("(multi-child-fd) join(exec()) = %d\n", join (exec (child_cmd)));
+
+  byte_cnt = read (handle, actual, sizeof actual - 1);
+  if (byte_cnt != sizeof actual - 1)
+    printf ("(multi-child-fd) fail: read() returned %d instead of %d\n",
+            byte_cnt, sizeof actual - 1);
+  else if (strcmp (sample, actual))
+    printf ("(multi-child-fd) fail: expected text differs from actual:\n%s",
+            actual);
+  
+  printf ("(multi-child-fd) end\n");
+  return 0;
+}