discover: Don't depend on tftp failure for type detection

Rather than always trying both TFTP client types, do a runtime detection
on first invocation. This can be fixed at build-time with
--with-tftp=TYPE.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/system/system.c b/lib/system/system.c
index 6e80b24..c9fe979 100644
--- a/lib/system/system.c
+++ b/lib/system/system.c
@@ -30,6 +30,12 @@ const struct pb_system_apps pb_system_apps = {
 	.udhcpc		= HOST_PROG_UDHCPC,
 };
 
+#ifndef TFTP_TYPE
+#define TFTP_TYPE TFTP_TYPE_UNKNOWN
+#endif
+
+enum tftp_type tftp_type = TFTP_TYPE;
+
 int pb_mkdir_recursive(const char *dir)
 {
 	struct stat statbuf;