selftests/nolibc: implement a few tests for various syscalls

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This adds 63 tests covering about 34 syscalls. Both successes and
failures are tested. Two tests fail when run as unprivileged user
(link_dir which returns EACCESS instead of EPERM, and chroot which
returns EPERM). One test (execve("/")) expects to fail on EACCESS,
but needs to have valid arguments otherwise the kernel will log a
message. And a few tests require /proc to be mounted.

The code is not pretty since all tests are one-liners, sometimes
resulting in long lines, especially when using compount statements to
preset a line, but it's convenient and doesn't obfuscate the code,
which is important to understand what failed.

Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Willy Tarreau 2022-07-19 23:44:37 +02:00 • committed by Paul E. McKenney

parent 23da7bc923

commit b4844fa0bd

1 changed files with 110 additions and 0 deletions

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tools/testing/selftests/nolibc/nolibc-test.c

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