tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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selftests/nolibc: try to read from stdin in readv_zero test

When stdout is redirected to a file this test fails.
This happens when running through the kselftest runner since
commit d9e6269e3303 ("selftests/run_kselftest.sh: exit with
error if tests fail").

For consistency with other tests that read from a file descriptor,
switch to stdin over stdout. The tests are still brittle against
a redirected stdin, but at least they are now consistently so.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260106-nolibc-selftests-v1-1-f82101c2c505@weissschuh.net

Thomas Weißschuh 4203c6fb 6b6dbf3e

+1 -1
+1 -1
tools/testing/selftests/nolibc/nolibc-test.c
··· 1404 1404 CASE_TEST(write_badf); EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break; 1405 1405 CASE_TEST(write_zero); EXPECT_SYSZR(1, write(1, &tmp, 0)); break; 1406 1406 CASE_TEST(readv_badf); EXPECT_SYSER(1, readv(-1, &iov_one, 1), -1, EBADF); break; 1407 - CASE_TEST(readv_zero); EXPECT_SYSZR(1, readv(1, NULL, 0)); break; 1407 + CASE_TEST(readv_zero); EXPECT_SYSZR(1, readv(0, NULL, 0)); break; 1408 1408 CASE_TEST(writev_badf); EXPECT_SYSER(1, writev(-1, &iov_one, 1), -1, EBADF); break; 1409 1409 CASE_TEST(writev_zero); EXPECT_SYSZR(1, writev(1, NULL, 0)); break; 1410 1410 CASE_TEST(ptrace); EXPECT_SYSER(1, ptrace(PTRACE_CONT, getpid(), NULL, NULL), -1, ESRCH); break;