Take two make nodefs inode numbers match

Fix problem with directory permissions

Author: hoodmane

src/library_nodefs.js

@@ -138,7 +138,7 @@ addToLibrary({
         }
         return {
           dev: stat.dev,
-          ino: stat.ino,
+          ino: node.id,
           mode: stat.mode,
           nlink: stat.nlink,
           uid: stat.uid,

test/fs/test_fs_readdir_ino_matches_stat_ino.c

@@ -31,6 +31,8 @@ void setup() {
   EM_ASM(FS.mount(NODEFS, { root: '.' }, 'working'));
   changedir("working");
 #endif
+  mkdir("sub", 0775);
+  changedir("sub");
 }
 
 int main() {
@@ -45,6 +47,13 @@ int main() {
   dirp = fdopendir(dirfd);
   assert(dirp != NULL);
   struct dirent *ep;
+  struct stat sta, stb;
+  assert(lstat("a", &sta) == 0);
+  assert(lstat("b", &stb) == 0);
+  // Remove execute permission from directory. This prevents us from stat'ing
+  // files in the directory in the implementation of readdir which we tried to
+  // use to fix this.
+  assert(chmod(".", 0675) == 0);
   int a_ino = -1;
   int b_ino = -1;
   while ((ep = readdir(dirp))) {
@@ -55,11 +64,10 @@ int main() {
       b_ino = ep->d_ino;
     }
   }
+  assert(errno == 0);
   assert(a_ino >= 0);
   assert(b_ino >= 0);
-  struct stat sta, stb;
-  assert(lstat("a", &sta) == 0);
-  assert(lstat("b", &stb) == 0);
+  assert(chmod(".", 0775) == 0);
   printf("readdir a_ino: %d, b_ino: %d\n", a_ino, b_ino);
   printf("stat    a_ino: %llu, b_ino: %llu\n", sta.st_ino, stb.st_ino);
   assert(a_ino == sta.st_ino);