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-rw-r--r--lib/libnetgraph/netgraph.314
1 files changed, 10 insertions, 4 deletions
diff --git a/lib/libnetgraph/netgraph.3 b/lib/libnetgraph/netgraph.3
index bf2de91..f51c515 100644
--- a/lib/libnetgraph/netgraph.3
+++ b/lib/libnetgraph/netgraph.3
@@ -255,12 +255,18 @@ and
.Xr ng_socket 4
KLD modules must have been loaded via
.Xr kldload 8 .
-.Sh DIAGNOSTICS
-All functions except
+.Sh RETURN VALUES
.Fn NgSetDebug
-and
+returns the previous debug setting.
.Fn NgSetErrLog
-return -1 if there was an error and set errno accordingly.
+has no return value.
+All other functions return -1 if there was an error and set errno
+accordingly.
+A return value of zero from
+.Fn NgRecvMsg
+or
+.Fn NgRecvData
+indicates that the netgraph socket has been closed.
.Pp
For
.Fn NgSendAsciiMsg
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