[PATCH bpf-next V3 0/2] BPF selftests test runner 'test_progs' use proper shell exit codes

Jesper Dangaard Brouer
2020-07-07T07:12:29Z

This patchset makes it easier to use test_progs from shell scripts, by using
proper shell exit codes. The process's exit status should be a number
between 0 and 255 as defined in man exit(3) else it will be masked to comply.

Shell exit codes used by programs should be below 127. As 127 and above are
used for indicating signals. E.g. 139 means 11=SIGSEGV $((139 & 127))=11.
POSIX defines in man wait(3p) signal check if WIFSIGNALED(STATUS) and
WTERMSIG(139)=11. (Hint: cmd 'kill -l' list signals and their numbers).

Using Segmentation fault as an example, as these have happened before with
different tests (that are part of test_progs). CI people writing these
shell-scripts could pickup these hints and report them, if that makes sense.

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Jesper Dangaard Brouer (2):
selftests/bpf: test_progs use another shell exit on non-actions
selftests/bpf: test_progs avoid minus shell exit codes

tools/testing/selftests/bpf/test_progs.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)

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