MfP4: Preserve permissions by default.

In particular, this fixes the oddity that -dumpl would apply
umask to copied dirs (which are created in the target tree)
but not to "copied" files (which are only linked).  After
this change:

$ ls -ld a a/b a/b/c
d--x-w-r--  3 tim  tim  512 Jul 29 20:08 a
drwxr----x  3 tim  tim  512 Jul 29 20:09 a/b
dr----x-w-  2 tim  tim  512 Jul 29 20:09 a/b/c
$ (echo a; echo a/b; echo a/b/c) | cpio -dumpl o
$ cd o
$ ls -ld a a/b a/b/c
d--x-w-r--  3 tim  tim  512 Jul 29 20:08 a
drwxr----x  3 tim  tim  512 Jul 29 20:09 a/b
dr----x-w-  2 tim  tim  512 Jul 29 20:09 a/b/c

1 files changed, 1 insertions, 0 deletions

diff --git a/usr.bin/cpio/cpio.c b/usr.bin/cpio/cpio.c
index 991e871..d79003f 100644
--- a/usr.bin/cpio/cpio.c
+++ b/usr.bin/cpio/cpio.c
@@ -111,6 +111,7 @@ main(int argc, char *argv[])
 	cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
 	cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
 	cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
+	cpio->extract_flags |= ARCHIVE_EXTRACT_PERM;
 	if (geteuid() == 0)
 		cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
 	cpio->bytes_per_block = 512;