Fix dup and dup2 in nacl-mounts

libraries/nacl-mounts/base/Entry.cc

Index: libraries/nacl-mounts/base/Entry.cc
===================================================================
--- libraries/nacl-mounts/base/Entry.cc	(revision 611)
+++ libraries/nacl-mounts/base/Entry.cc	(working copy)
@@ -49,6 +49,8 @@
   DECLARE(fdio, read);
   DECLARE(fdio, seek);
   DECLARE(fdio, write);
+  DECLARE(fdio, dup);
+  DECLARE(fdio, dup2);
 
   DECLARE(filename, open);
   DECLARE(filename, stat);
@@ -217,6 +219,19 @@
     return (res < 0) ? errno : 0;
   }
 
+  int WRAP(dup)(int fd, int *newfd) {
+    int res = kp->dup(fd);
+    if (res < 0)
+      return errno;
+    *newfd = res;
+    return 0;
+  }
+
+  int WRAP(dup2)(int fd, int newfd) {
+    int res = kp->dup2(fd, newfd);
+    return (res < 0) ? errno : 0;
+  }
+
   int WRAP(read)(int fd, void *buf, size_t count, size_t *nread) {
     *nread = kp->read(fd, buf, count);
     return (*nread < 0) ? errno : 0;
@@ -454,6 +469,8 @@
       DO_WRAP(fdio, read);
       DO_WRAP(fdio, seek);
       DO_WRAP(fdio, write);
+      DO_WRAP(fdio, dup);
+      DO_WRAP(fdio, dup2);
       DO_WRAP(filename, open);
       DO_WRAP(filename, stat);
       DO_WRAP(memory, mmap);