#
# Functions for doing things with files
#

# Determine if a file is an iso9660 image without using file(1)
#
# Args:
#  1 - Path to file

file_is_iso9660()
{
    [ -r "$1" ] \
	&& __ISO9660MAGIC=$(dd "if=$1" bs=1 skip=32769 count=5 2>/dev/null) \
	&& [ "${__ISO9660MAGIC}" = "CD001" ] \
	|| false    
}