util: Introduce "subprogram_name" to identify subprocesses and threads.

This will be more useful later when we introduces "worker" subprocesses.
I don't have any current plans to introduce threading, but I can't
think of a disadvantage to wording this in a general manner.

Signed-off-by: Ben Pfaff <blp@nicira.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/util.h b/lib/util.h
index 1bdaeee5..dd86de26 100644
--- a/lib/util.h
+++ b/lib/util.h
@@ -62,6 +62,7 @@
 #endif
 
 extern const char *program_name;
+extern const char *subprogram_name;
 
 /* Returns the number of elements in ARRAY. */
 #define ARRAY_SIZE(ARRAY) (sizeof ARRAY / sizeof *ARRAY)