1. to run tmpfs as a regular user, /servers/default-pager must be executable by that user. by default it seems to be set to read/write.

   $ sudo chmod ugo+x /servers/default-pager
   

   Then I get this error:

   tmpfs: /build/mbanck/hurd-20060825/build-tree/hurd/tmpfs/dir.c:62: diskfs_get_directs: Assertion `__builtin_offsetof (struct tmpfs_dirent, name) >= __builtin_offsetof (struct dirent, d_name)' failed.
   

2. i rearranged the struct tempfs_dirent in tmpfs.h to line up with the struct dirent. now the assert passes at line 62 of dir.c passes.

    struct tmpfs_dirent
    {
      struct tmpfs_dirent *next;
      struct disknode *dn;
   +  char padding[3];
      uint8_t namelen;
      char name[0];
    };
   

   now ls works on an empty directory. you can touch files, and run `ls' on them. mkdir, rmdir works too. fsysopts works df works

3. creating a symlink fails.

   old patch to get symlinks working:

   http://www.mail-archive.com/bug-hurd@gnu.org/msg11844.html
   --- node.c.orig 2005-07-24 09:56:39.000000000 -0400
   +++ node.c      2005-07-24 09:55:46.000000000 -0400
   @@ -330,6 +330,7 @@
    create_symlink_hook (struct node *np, const char *target)
    {
      assert (np->dn->u.lnk == 0);
   +  np->dn_stat.st_size = strlen (target);
      if (np->dn_stat.st_size > 0)
        {
          const size_t size = np->dn_stat.st_size + 1;
   @@ -337,6 +338,7 @@
          if (np->dn->u.lnk == 0)
           return ENOSPC;
          memcpy (np->dn->u.lnk, target, size);
   +      np->dn->type = DT_LNK;
          adjust_used (size);
          recompute_blocks (np);
        }
   @@ -380,8 +382,6 @@
    error_t
    diskfs_truncate (struct node *np, off_t size)
    {
   -  if (np->allocsize <= size)
   -    return 0;
   
   
      if (np->dn->type == DT_LNK)
        {
   @@ -392,6 +392,9 @@
          return 0;
        }
   
   
   +  if (np->allocsize <= size)
   +    return 0;
   +
      assert (np->dn->type == DT_REG);
   
   
      if (default_pager == MACH_PORT_NULL)
   

   now symlinks work.

4. can't write data to a file

miscellaneous notes:

diskfs_disk_name could be NULL, but it is "swap"

using default_pager_object_set_size (np->dn->u.reg.memobj, size); to truncate and grow.

why are our blocks 512? shouldn't it something else? or at least settable? or does libdiskfs demand this?

diskfs_get_filemap_pager_struct (struct node *np) returns null. shouldn't it return default_pager?