Use libps and enhance [pid]/stat

* Makefile: Add libps to the $(LIBS).
* proclist.c, proclist.h: Embed the proc server port in a
  ps_context structure. (proclist_make_node): Change to prototype to
  allow for the possibility of error.  Rename to proclist_create_node to
  reflect the change and non-triviality.
* process.c, process.h: Revamp.  Use a full-blown procstat
  structure instead of just the procinfo fetched from the process
  server.  Use the additional data to complement [pid]/stat.
  (process_lookup_pid): Get a ps_context structure instead of a port to
  the process server.
* main.c (root_make_node): Convert to the new interface for
  proclist_create_node.

1 files changed, 4 insertions, 3 deletions

diff --git a/main.c b/main.c
index 1560281..75e1cda 100644
--- a/main.c
+++ b/main.c
@@ -25,16 +25,17 @@ root_make_node (struct node **np)
   /* We never have two root nodes alive simultaneously, so it's ok to
      have this as static data.  */
   static struct node *root_dirs[3];
+  error_t err;
 
   root_dirs[0] = procfs_dir_make_node (static_entries, NULL, NULL);
   if (! root_dirs[0])
     return ENOMEM;
 
-  root_dirs[1] = proclist_make_node (getproc ());
-  if (! root_dirs[1])
+  err = proclist_create_node (getproc (), &root_dirs[1]);
+  if (err)
     {
       netfs_nrele (root_dirs[0]);
-      return ENOMEM;
+      return err;
     }
 
   root_dirs[2] = NULL;