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selftests/nolibc: try to read from stdin in readv_zero test

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When stdout is redirected to a file this test fails.
This happens when running through the kselftest runner since
commit d9e6269e33 ("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
This commit is contained in:
Thomas Weißschuh 2026-01-06 12:44:57 +01:00
parent 6b6dbf3e4e
commit 4203c6fb5e
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/nolibc/nolibc-test.c
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@ -1404,7 +1404,7 @@ int run_syscall(int min, int max)
CASE_TEST(write_badf); EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break;
CASE_TEST(write_zero); EXPECT_SYSZR(1, write(1, &tmp, 0)); break;
CASE_TEST(readv_badf); EXPECT_SYSER(1, readv(-1, &iov_one, 1), -1, EBADF); break;
CASE_TEST(readv_zero); EXPECT_SYSZR(1, readv(1, NULL, 0)); break;
CASE_TEST(readv_zero); EXPECT_SYSZR(1, readv(0, NULL, 0)); break;
CASE_TEST(writev_badf); EXPECT_SYSER(1, writev(-1, &iov_one, 1), -1, EBADF); break;
CASE_TEST(writev_zero); EXPECT_SYSZR(1, writev(1, NULL, 0)); break;
CASE_TEST(ptrace); EXPECT_SYSER(1, ptrace(PTRACE_CONT, getpid(), NULL, NULL), -1, ESRCH); break;