===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/patch/patch.1,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- src/usr.bin/patch/patch.1	1996/06/10 11:21:30	1.2
+++ src/usr.bin/patch/patch.1	1998/11/25 00:30:25	1.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: patch.1,v 1.2 1996/06/10 11:21:30 niklas Exp $	-*- nroff -*-
+.\"	$OpenBSD: patch.1,v 1.3 1998/11/25 00:30:25 espie Exp $	-*- nroff -*-
 .rn '' }`
 .de Sh
 .br
@@ -218,6 +218,9 @@
 .I patch
 to interpret the patch file as a context diff.
 .TP 5
+.B \-C or \-\-check
+checks that the patch would apply cleanly, but does not modify anything.
+.TP 5
 .B \-d or \-\-directory
 causes
 .I patch
@@ -504,6 +507,14 @@
 .SH BUGS
 Could be smarter about partial matches, excessively \&deviant offsets and
 swapped code, but that would take an extra pass.
+.PP
+Check patch mode (
+.BR -C )
+will fail if you try to check several patches in succession that build on
+each other.  The whole code of 
+.I patch
+would have to be restructured to keep temporary files around so that it can
+handle this situation.
 .PP
 If code has been duplicated (for instance with #ifdef OLDCODE ... #else ...
 #endif),