dd: fix a signal handling race

* src/dd.c (main): Install the signal handlers at startup
rather than just before the copy starts. In this way signals
received before the copy (like during a slow truncate for e.g.)
will be deferred and handled consistently.
* THANKS: Add Bernhard's email address.
* NEWS: Mention the fix.
Reported by Bernhard Voelker.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/dd.c b/src/dd.c
index d9e4c85b8..30bd8085c 100644
--- a/src/dd.c
+++ b/src/dd.c
@@ -1828,6 +1828,8 @@ main (int argc, char **argv)
   int exit_status;
   off_t offset;
 
+  install_signal_handlers ();
+
   initialize_main (&argc, &argv);
   set_program_name (argv[0]);
   setlocale (LC_ALL, "");
@@ -1928,8 +1930,6 @@ main (int argc, char **argv)
 	}
     }
 
-  install_signal_handlers ();
-
   start_time = gethrxtime ();
 
   exit_status = dd_copy ();