log: Add vlogmsg()

Currently logmsg() is only available as a variadic function.  This is fine
for normal use, but is awkward if we ever want to write wrappers around it
which (for example) add standardised prefix information.  To allow that,
add a vlogmsg() function which takes a va_list instead, and implement
logmsg() in terms of it.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/log.h b/log.h
index df72f9a..9c38182 100644
--- a/log.h
+++ b/log.h
@@ -12,6 +12,7 @@
 #define LOGFILE_CUT_RATIO		30	/* When full, cut ~30% size */
 #define LOGFILE_SIZE_MIN		(5UL * MAX(BUFSIZ, PAGE_SIZE))
 
+void vlogmsg(int pri, const char *format, va_list ap);
 void logmsg(int pri, const char *format, ...)
 	__attribute__((format(printf, 2, 3)));