Index: io_stream.cc
===================================================================
RCS file: /cvs/cygwin-apps/setup/io_stream.cc,v
retrieving revision 2.17
diff -u -p -r2.17 io_stream.cc
--- io_stream.cc	5 May 2005 22:48:35 -0000	2.17
+++ io_stream.cc	14 Oct 2005 04:55:53 -0000
@@ -99,7 +99,8 @@ io_stream::open (String const &name, Str
 {
   IOStreamProvider const *p = findProvider (name);
   if (!p)
-    throw new invalid_argument ("URL Scheme not registered!");
+    throw new invalid_argument ((String("URL Scheme for '")+
+				 name+"' not registered!").c_str());
   io_stream *rv = p->open (&name.c_str()[p->key.size()], mode);
   if (!rv->error ())
     return rv;
@@ -112,7 +113,8 @@ io_stream::mkpath_p (path_type_t isadir,
 {
   IOStreamProvider const *p = findProvider (name);
   if (!p)
-    throw new invalid_argument ("URL Scheme not registered!");
+    throw new invalid_argument ((String("URL Scheme for '")+
+				 name+"' not registered!").c_str());
   return p->mkdir_p (isadir, &name.c_str()[p->key.size()]);
 }
 
@@ -122,7 +124,8 @@ io_stream::remove (String const &name)
 {
   IOStreamProvider const *p = findProvider (name);
   if (!p)
-    throw new invalid_argument ("URL Scheme not registered!");
+    throw new invalid_argument ((String("URL Scheme for '")+
+				 name+"' not registered!").c_str());
   return p->remove (&name.c_str()[p->key.size()]);
 }
 
@@ -134,8 +137,12 @@ io_stream::mklink (String const &from, S
     << endLog;
   IOStreamProvider const *fromp = findProvider (from);
   IOStreamProvider const *top = findProvider (to);
-  if (!fromp || !top)
-    throw new invalid_argument ("URL Scheme not registered!");
+  if (!fromp)
+    throw new invalid_argument ((String("URL Scheme for '")+
+				 from+"' not registered!").c_str());
+  if (!top)
+    throw new invalid_argument ((String("URL Scheme for '")+
+				 to+"' not registered!").c_str());
   if (fromp != top)
     throw new invalid_argument ("Attempt to link across url providers.");
   return fromp->mklink (&from.c_str()[fromp->key.size()], 
@@ -198,8 +205,12 @@ io_stream::move (String const &from, Str
 {
   IOStreamProvider const *fromp = findProvider (from);
   IOStreamProvider const *top = findProvider (to);
-  if (!fromp || !top)
-    throw new invalid_argument ("URL Scheme not registered!");
+  if (!fromp)
+    throw new invalid_argument ((String("URL Scheme for '")+
+				 from+"' not registered!").c_str());
+  if (!top)
+    throw new invalid_argument ((String("URL Scheme for '")+
+				 to+"' not registered!").c_str());
   if (fromp != top)
     return io_stream::move_copy (from, to);
   return fromp->move (&from.c_str()[fromp->key.size()],
@@ -235,7 +246,8 @@ io_stream::exists (String const &name)
 {
   IOStreamProvider const *p = findProvider (name);
   if (!p)
-    throw new invalid_argument ("URL Scheme not registered!");
+    throw new invalid_argument ((String("URL Scheme for '")+
+				 name+"' not registered!").c_str());
   return p->exists (&name.c_str()[p->key.size()]);
 }