selftests/bpf: Remove hexdump dependency#11074
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The verification signature header generation requires converting a binary certificate to a C array. Previously this only worked with xxd, and a switch to hexdump has been done in commit b640d55 ("selftests/bpf: Remove xxd util dependency"). hexdump is a more common utility program, yet it might not be installed by default. When it is not installed, BPF selftests build without errors, but tests_progs is unusable: it exits with the 255 code and without any error messages. When manually reproducing the issue, it is not too hard to find out that the generated verification_cert.h file is incorrect, but that's time consuming. When digging the BPF selftests build logs, this line can be seen amongst thousands others, but ignored: /bin/sh: 2: hexdump: not found Here, od is used with awk, instead of hexdump with sed. od is coming from the core utils package, and this new od command produces the same output when using od from GNU coreutils, uutils, and even busybox. This is more portable, and it produces the same results as what was done before with hexdump (without trailing whitespaces as a bonus). Fixes: b640d55 ("selftests/bpf: Remove xxd util dependency") Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Tested-by: Mykyta Yatsenko <yatsenko@meta.com>
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Pull request for series with
subject: selftests/bpf: Remove hexdump dependency
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1054626