[root@laptop /usr/src]# patch < /root/patches/libarchive.patch
Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|Index: lib/libarchive/archive_read_support_compression_none.c
|===================================================================
|RCS file: /home/ncvs/src/lib/libarchive/archive_read_support_compression_none.c,v
|retrieving revision 1.8
|diff -u -I__FBSDID -r1.8 archive_read_support_compression_none.c
|--- lib/libarchive/archive_read_support_compression_none.c     29 Aug 2006 04:59:25 -0000      1.8
|+++ lib/libarchive/archive_read_support_compression_none.c     2 Nov 2006 05:17:28 -0000
--------------------------
Patching file lib/libarchive/archive_read_support_compression_none.c using Plan A...
Hunk #1 failed at 257.
Hunk #2 failed at 289.
Hunk #3 failed at 307.
Hunk #4 failed at 320.
4 out of 4 hunks failed--saving rejects to lib/libarchive/archive_read_support_compression_none.c.rej
done