[PATCH] remap translator: remap prefixes instead of complete file names

[Joan Lledó]

From: Joan Lledó <jlledom@member.fsf.org>

* trans/remap.c:
        * trivfs_S_dir_lookup():
                * Match and replace prefixes instead of complete
                  file names. This is needed to remap entire file
                  systems, not only trivial ones.
---
 trans/remap.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/trans/remap.c b/trans/remap.c
index 5afbaa02..e3d5fa0a 100644
--- a/trans/remap.c
+++ b/trans/remap.c
@@ -65,19 +65,23 @@ trivfs_S_dir_lookup (struct trivfs_protid *diruser,
                     mach_msg_type_name_t *retry_port_type)
 {
   struct remap *remap;
+  char dest[NAME_MAX] = { };
 
   if (!diruser)
     return EOPNOTSUPP;
 
   for (remap = remaps; remap; remap = remap->next)
-    /* FIXME: should match just prefix of filename too */
-    if (!strcmp (remap->from, filename))
+    if (!strncmp (remap->from, filename, strlen (remap->from)))
       {
+       snprintf (dest, NAME_MAX, "%s%s", remap->to,
+                 filename + strlen (remap->from));
+
 #ifdef DEBUG
-       fprintf (stderr,"replacing %s with %s\n", remap->from, remap->to);
+       fprintf (stderr, "replacing %s with %s\n", filename, dest);
        fflush (stderr);
 #endif
-       filename = remap->to;
+
+       strncpy (filename, dest, NAME_MAX);
        break;
       }
 
-- 
2.20.1