test: only check fd 0,1,2 are used and not their access modes
Don't do a write on stdout/stderr because that checks for their writability. But fd=1 could legitimately be opened with read-only access by the user. What this test needs to only ensure is that they are used at startup.
Checklist
-
make -j4 test
(UNIX) -
tests and/or benchmarks are included -
commit message follows commit guidelines
Affected core subsystem(s)
test