1 files changed, 75 insertions, 0 deletions

diff --git a/tests/filesys/extended/dir-rm-cwd.c b/tests/filesys/extended/dir-rm-cwd.c
new file mode 100644
index 0000000..78e13de
--- /dev/null
+++ b/tests/filesys/extended/dir-rm-cwd.c
@@ -0,0 +1,75 @@
+/* Tries to remove the current directory, which may succeed or
+   fail.  The requirements in each case are different; refer to
+   the assignment for details. */
+
+#include <syscall.h>
+#include "tests/lib.h"
+#include "tests/main.h"
+
+static int
+wrap_open (const char *name) 
+{
+  static int fds[8], fd_cnt;
+  int fd, i;
+
+  CHECK ((fd = open (name)) > 1, "open \"%s\"", name);
+  for (i = 0; i < fd_cnt; i++)
+    if (fds[i] == fd)
+      fail ("fd returned is not unique");
+  fds[fd_cnt++] = fd;
+  return fd;
+}
+
+void
+test_main (void) 
+{
+  int root_fd, a_fd0;
+  char name[READDIR_MAX_LEN + 1];
+
+  root_fd = wrap_open ("/");
+  CHECK (mkdir ("a"), "mkdir \"a\"");
+
+  a_fd0 = wrap_open ("/a");
+  CHECK (!readdir (a_fd0, name), "verify \"/a\" is empty");
+  CHECK (inumber (root_fd) != inumber (a_fd0),
+         "\"/\" and \"/a\" must have different inumbers");
+
+  CHECK (chdir ("a"), "chdir \"a\"");
+
+  msg ("try to remove \"/a\"");
+  if (remove ("/a"))
+    {
+      msg ("remove successful");
+
+      CHECK (open ("/a") == -1, "open \"/a\" (must fail)");
+      CHECK (open (".") == -1, "open \".\" (must fail)");
+      CHECK (open ("..") == -1, "open \"..\" (must fail)");
+      CHECK (!create ("x", 512), "create \"x\" (must fail)");
+    }
+  else
+    {
+      int a_fd1, a_fd2, a_fd3;
+
+      msg ("remove failed");
+
+      CHECK (!remove ("../a"), "try to remove \"../a\" (must fail)");
+      CHECK (!remove (".././a"), "try to remove \".././a\" (must fail)");
+      CHECK (!remove ("/./a"), "try to remove \"/./a\" (must fail)");
+
+      a_fd1 = wrap_open ("/a");
+      a_fd2 = wrap_open (".");
+      CHECK (inumber (a_fd1) == inumber (a_fd2),
+             "\"/a\" and \".\" must have same inumber");
+      CHECK (inumber (root_fd) != inumber (a_fd1),
+             "\"/\" and \"/a\" must have different inumbers");
+
+      CHECK (chdir ("/a"), "chdir \"/a\"");
+      a_fd3 = wrap_open (".");
+      CHECK (inumber (a_fd3) == inumber (a_fd1),
+             "\".\" must have same inumber as before");
+
+      CHECK (chdir ("/"), "chdir \"/\"");
+      CHECK (!remove ("a"), "try to remove \"a\" (must fail: still open)");
+    }
+  CHECK (!readdir (a_fd0, name), "verify \"/a\" is empty");
+}