MFC r307873,r314397,r314399,r314419,r314420,r314533,r316553:

r307873 (by marcel):

Include <stdarg.h> instead of <machine/stdarg.h> when compiled as
part of libsbuf. The former is the standard header, and allows us
to compile libsbuf on macOS/linux.

r314397 (by scottl):

Implement sbuf_prf(), which takes an sbuf and outputs it
to stdout in the non-kernel case and to the console+log
in the kernel case.  For the kernel case it hooks the
putbuf() machinery underneath printf(9) so that the buffer
is written completely atomically and without a copy into
another temporary buffer.  This is useful for fixing
compound console/log messages that become broken and
interleaved when multiple threads are competing for the
console.

r314399 (by scottl):

Add prototype for sbuf_putbuf()

r314419 (by jkim):

Include stdio.h to fix libsbuf build.

r314420 (by scottl):

Provide a comment on why stdio.h needs to be included.

r314533 (by scottl):

Expose the sbuf_putbuf() symbol to libsbuf.  There are a few other symbols
that are present but not exposed, like get/set/clear flags, not sure if they
need to be exposed at this point.

r316553:

sbuf(3): expose sbuf_{clear,get,set}_flags(3) via libsbuf

These functions were added to sbuf(9) in r279992, but never
exposed to userspace. Expose them now so they can be used/tested.

2 files changed, 11 insertions, 0 deletions

diff --git a/lib/libsbuf/Symbol.map b/lib/libsbuf/Symbol.map
index 164b8f3..7bbc4bf 100644
--- a/lib/libsbuf/Symbol.map
+++ b/lib/libsbuf/Symbol.map
@@ -21,6 +21,9 @@ FBSD_1.2 {
 	sbuf_len;
 	sbuf_done;
 	sbuf_delete;
+	sbuf_clear_flags;
+	sbuf_get_flags;
+	sbuf_set_flags;
 };
 
 FBSD_1.3 {
@@ -31,3 +34,8 @@ FBSD_1.3 {
 FBSD_1.4 {
 	sbuf_hexdump;
 };
+
+FBSD_1.5 {
+	sbuf_putbuf;
+};
+
diff --git a/lib/libsbuf/Version.def b/lib/libsbuf/Version.def
index fd5c6be..2894712 100644
--- a/lib/libsbuf/Version.def
+++ b/lib/libsbuf/Version.def
@@ -8,3 +8,6 @@ FBSD_1.3 {
 
 FBSD_1.4 {
 } FBSD_1.3;
+
+FBSD_1.5 {
+} FBSD_1.4;