Author: kevans
Date: Fri Aug 17 03:42:57 2018
New Revision: 337952
URL: https://svnweb.freebsd.org/changeset/base/337952
Log:
subr_prf: Don't write kern.boot_tag if it's empty
This change allows one to set kern.boot_tag="" and not get a blank line
preceding other boot messages. While this isn't super critical- blank lines
are easy to filter out both mentally and in processing dmesg later- it
allows for a mode of operation that matches previous behavior.
I intend to MFC this whole series to stable/11 by the end of the month with
boot_tag empty by default to make this effectively a nop in the stable
branch.
Modified:
head/sys/kern/subr_prf.c
Modified: head/sys/kern/subr_prf.c
==============================================================================
--- head/sys/kern/subr_prf.c Fri Aug 17 03:05:09 2018 (r337951)
+++ head/sys/kern/subr_prf.c Fri Aug 17 03:42:57 2018 (r337952)
@@ -1048,7 +1048,7 @@ msgbufinit(void *ptr, int size)
if (msgbufmapped && oldp != msgbufp)
msgbuf_copy(oldp, msgbufp);
msgbufmapped = true;
- if (print_boot_tag)
+ if (print_boot_tag && *current_boot_tag != '\0')
printf("%s\n", current_boot_tag);
oldp = msgbufp;
}
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