[OpenWrt-Devel] [PATCH] x86: generate reproducible UUID

[Paul Spooren]

This commit changes the behaviour of UUID generation. Instead of using
the rand module of perl, generating a random UUID per compile, it now
hashes the SOURCE_DATE_EPOCH, resulting in a reproducible UUID.

Signed-off-by: Paul Spooren <mail at aparcar.org>
---
 target/linux/x86/image/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/linux/x86/image/Makefile b/target/linux/x86/image/Makefile
index ac70e771c8..68c2bee9d4 100644
--- a/target/linux/x86/image/Makefile
+++ b/target/linux/x86/image/Makefile
@@ -40,7 +40,7 @@ ifneq ($(GRUB_TERMINALS),)
   GRUB_TERMINAL_CONFIG := terminal_input $(GRUB_TERMINALS); terminal_output $(GRUB_TERMINALS)
 endif
 
-SIGNATURE:=$(shell perl -e 'printf("%08x", rand(0xFFFFFFFF))')
+SIGNATURE:=$(shell echo "$(SOURCE_DATE_EPOCH)" | sha256sum | cut -c 1-8 -z)
 ROOTPART:=$(call qstrip,$(CONFIG_TARGET_ROOTFS_PARTNAME))
 ROOTPART:=$(if $(ROOTPART),$(ROOTPART),PARTUUID=$(SIGNATURE)-02)
 
-- 
2.24.0.rc1


_______________________________________________
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
https://lists.openwrt.org/mailman/listinfo/openwrt-devel