For mulitcons boot, report it and which console is primary

Until we can do proper /etc/rc output on both consoles in multicons
boot (or all of them if we ever generalize), report when we are
booting multicons. Also report the primary console. This will be a big
hint why output stops after this line (though some slow USB discovery
still happens after mountroot / init starts).

Reviewed by: scottl@, tsoome@
Differential Revision: https://reviews.freebsd.org/D26574

1 files changed, 9 insertions, 1 deletions

diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c
index 045e2797a2f4..2f9919a7dca9 100644
--- a/sys/kern/init_main.c
+++ b/sys/kern/init_main.c
@@ -715,6 +715,14 @@ start_init(void *dummy)
 	/* Wipe GELI passphrase from the environment. */
 	kern_unsetenv("kern.geom.eli.passphrase");
 
+	/* For Multicons, report which console is primary to both */
+	if (boothowto & RB_MULTIPLE) {
+		if (boothowto & RB_SERIAL)
+			printf("Dual Console: Serial Primary, Video Secondary\n");
+		else
+			printf("Dual Console: Video Primary, Serial Secondary\n");
+	}
+
 	if ((var = kern_getenv("init_path")) != NULL) {
 		strlcpy(init_path, var, sizeof(init_path));
 		freeenv(var);
@@ -724,7 +732,7 @@ start_init(void *dummy)
 	while ((path = strsep(&tmp_init_path, ":")) != NULL) {
 		if (bootverbose)
 			printf("start_init: trying %s\n", path);
-			
+
 		memset(&args, 0, sizeof(args));
 		error = exec_alloc_args(&args);
 		if (error != 0)