# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1712095111 -7200
# Node ID eff120c8f9e3bf38da7de6b28ae296f8b261af46
# Parent  bc1d11f419631919e85cbe4a320ed7d046c088c4
Tidy up current pipe region handling, particularly when the region is exhausted.

diff -r bc1d11f41963 -r eff120c8f9e3 libfsclient/lib/src/client.cc
--- a/libfsclient/lib/src/client.cc	Tue Apr 02 23:16:23 2024 +0200
+++ b/libfsclient/lib/src/client.cc	Tue Apr 02 23:58:31 2024 +0200
@@ -118,9 +118,11 @@
   }
   else
   {
+    bool initial = (file->memory == NULL);
+
     /* Handle the initial condition with no current region. */
 
-    if (file->memory == NULL)
+    if (initial)
     {
       err = client_current_region(file);
       if (err)
@@ -150,7 +152,10 @@
 
     else
     {
-      return client_current_region(file);
+      if (initial)
+        return L4_EOK;
+      else
+        return client_current_region(file);
     }
   }
 }
@@ -552,7 +557,17 @@
   if (!client_opened(file))
     return -L4_EINVAL;
 
-  return pipe_current(file);
+  long err = pipe_current(file);
+
+  if (err)
+    return err;
+
+  /* Handle any case where the current region has been exhausted. */
+
+  if (!file_populated_span(file))
+    file->data_current = 0;
+
+  return L4_EOK;
 }