Improve pages that briefly mentioned ERR - usually below SEE ALSO -

but failed to provide any real information.
OK tb@ jmc@

1 files changed, 17 insertions, 4 deletions

diff --git a/src/lib/libcrypto/man/OBJ_nid2obj.3 b/src/lib/libcrypto/man/OBJ_nid2obj.3
index ad743b06a0..26acea5c58 100644
--- a/src/lib/libcrypto/man/OBJ_nid2obj.3
+++ b/src/lib/libcrypto/man/OBJ_nid2obj.3
@@ -1,4 +1,4 @@
-.\"     $OpenBSD: OBJ_nid2obj.3,v 1.13 2019/06/06 01:06:58 schwarze Exp $
+.\"     $OpenBSD: OBJ_nid2obj.3,v 1.14 2019/06/14 13:59:32 schwarze Exp $
 .\"     OpenSSL c264592d May 14 11:28:00 2006 +0000
 .\"
 .\" This file is a derived work.
@@ -66,7 +66,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 .\" OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: June 6 2019 $
+.Dd $Mdocdate: June 14 2019 $
 .Dt OBJ_NID2OBJ 3
 .Os
 .Sh NAME
@@ -340,6 +340,20 @@ on error.
 returns the new NID or
 .Dv NID_undef
 if an error occurs.
+.Pp
+In some cases of failure of
+.Fn OBJ_nid2obj ,
+.Fn OBJ_nid2ln ,
+.Fn OBJ_nid2sn ,
+.Fn OBJ_txt2nid ,
+.Fn OBJ_txt2obj ,
+.Fn OBJ_obj2txt ,
+.Fn OBJ_dup ,
+.Fn OBJ_create ,
+and
+.Fn i2t_ASN1_OBJECT ,
+the reason can be determined with
+.Xr ERR_get_error 3 .
 .Sh EXAMPLES
 Create an object for
 .Sy commonName :
@@ -369,8 +383,7 @@ obj = OBJ_txt2obj("1.2.3.4", 1);
 .Ed
 .Sh SEE ALSO
 .Xr ASN1_OBJECT_new 3 ,
-.Xr d2i_ASN1_OBJECT 3 ,
-.Xr ERR_get_error 3
+.Xr d2i_ASN1_OBJECT 3
 .Sh HISTORY
 .Fn OBJ_nid2obj ,
 .Fn OBJ_nid2ln ,