2016-07-03 17:16:30 +00:00
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From: Matthias Schiffer <mschiffer@universe-factory.net>
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Date: Sun, 3 Jul 2016 19:15:49 +0200
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Subject: x86: stop relying on hexdump for image build signature
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Use perl to generate random number instead.
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See https://github.com/freifunk-gluon/gluon/issues/811
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Backport of LEDE d5ee23ee275fcd6550b0051de59706cc928cdac8
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diff --git a/target/linux/x86/image/Makefile b/target/linux/x86/image/Makefile
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2016-12-20 00:09:53 +00:00
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index e7e02f15fbb3d1638b26982e7ddff305464e6851..6f64eba398e34093308b766839e69780512a4ca8 100644
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2016-07-03 17:16:30 +00:00
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--- a/target/linux/x86/image/Makefile
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+++ b/target/linux/x86/image/Makefile
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@@ -40,7 +40,7 @@ ifneq ($(GRUB_TERMINALS),)
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GRUB_TERMINAL_CONFIG := terminal_input $(GRUB_TERMINALS); terminal_output $(GRUB_TERMINALS)
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endif
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-SIGNATURE:=$(shell dd if=/dev/urandom bs=4 count=1 2>/dev/null | hexdump -v -e '"%08x"')
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+SIGNATURE:=$(shell perl -e 'printf("%08x", rand(0xFFFFFFFF))')
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ROOTPART:=$(call qstrip,$(CONFIG_TARGET_ROOTFS_PARTNAME))
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ROOTPART:=$(if $(ROOTPART),$(ROOTPART),PARTUUID=$(SIGNATURE)-02)
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