build: add setup_entropy idea by @lattera the FreeBSD way

build/common.sh

@@ -297,6 +297,23 @@ setup_distfiles()
 	fi
 }
 
+setup_entropy()
+{
+	echo ">>> Setting up entropy in ${1}"
+
+	mkdir -p ${1}/boot
+
+	umask 077
+
+	dd if=/dev/random of=${1}/boot/entropy bs=4096 count=1
+	dd if=/dev/random of=${1}/entropy bs=4096 count=1
+
+	chown 0:0 ${1}/boot/entropy
+	chown 0:0 ${1}/entropy
+
+	umask 022
+}
+
 generate_signature()
 {
 	SIGNCMD="${TOOLSDIR}/scripts/pkg_sign.sh"

build/iso.sh

@@ -41,6 +41,7 @@ setup_base ${STAGEDIR}
 setup_kernel ${STAGEDIR}
 setup_packages ${STAGEDIR}
 setup_mtree ${STAGEDIR}
+setup_entropy ${STAGEDIR}
 
 echo -n ">>> Building ISO image... "
 

build/memstick.sh

@@ -52,6 +52,8 @@ cat > ${STAGEDIR}/etc/fstab << EOF
 tmpfs		/tmp		tmpfs	rw,mode=01777	0	0
 EOF
 
+setup_entropy ${STAGEDIR}
+
 makefs -t ffs -B little -o label=${LABEL} ${VGAIMG} ${STAGEDIR}
 
 echo "-S115200 -D" > ${STAGEDIR}/boot.config
@@ -68,6 +70,8 @@ sed -i '' -e 's:</system>:<enableserial/></system>:' \
 
 sed -i '' -Ee 's:^ttyu0:ttyu0	"/usr/libexec/getty std.9600"	cons25	on  secure:' ${STAGEDIR}/etc/ttys
 
+setup_entropy ${STAGEDIR}
+
 makefs -t ffs -B little -o label=${LABEL} ${SERIALIMG} ${STAGEDIR}
 
 setup_bootcode()

build/nano.sh

@@ -157,9 +157,11 @@ setup_partition()
 	umount ${3}
 }
 
+setup_entropy ${STAGEDIR}
 setup_partition /dev/${MD}s1 ${LABEL}0 ${MNT} ${STAGEDIR}
 
 if [ ${NANO_IMAGES} -gt 1 ]; then
+	setup_entropy ${STAGEDIR}
 	setup_partition /dev/${MD}s2 ${LABEL}1 ${MNT} ${STAGEDIR}
 fi