- file upload handler: if client-reported offset is less than file size,

don't just print an error message;
    lseek() back to the offset point.
    Otherwise we can end up with duplication in the file.


svn path=/trunk/boinc/; revision=23041

checkin_notes

@@ -789,3 +789,11 @@ David  15 Feb 2011
         transitioner.cpp
         sched_resend.cpp
         
+David  15 Feb 2011
+    - file upload handler: if client-reported offset is less than file size,
+        don't just print an error message;
+        lseek() back to the offset point.
+        Otherwise we can end up with duplication in the file.
+
+    sched/
+        file_upload_handler.cpp

sched/file_upload_handler.cpp

@@ -196,6 +196,7 @@ int copy_socket_to_file(FILE* in, char* path, double offset, double nbytes) {
         );
     }
     if (sbuf.st_size > offset) {
+        lseek(fd, offset, SEEK_SET);
         log_messages.printf(MSG_CRITICAL,
             "file %s length on disk %d bytes; host upload starting at %.0f bytes.\n",
              this_filename, (int)sbuf.st_size, offset