When printing the header, convert values to names:
Use strlcpy to copy the name, not strncpy.

magic:      0x27051956
time:        Tue Jun  7 15:58:41 2011
size:        2482203
load addr:  0x00020000
entry point: 0x00020000
data crc:    0x700fdf53
os:          2 (netbsd)
arch:        7 (powerpc)
type:        2 (kernel)
comp:        1 (gz)
name:        NetBSD/evbppc 5.99.52 (INSTALL_
header crc:  0x94ea96cf

(matt)