I was wondering if --fd 0 would work, but it doesn't. This hangs:
$ ../passt -1 -f -e --fd 0 < testcase_dir/empty_tap
It's clear from strace why this is. Trying to add fd 0 to epoll
returns -EPERM. The epoll_ctl(2) manual says:
EPERM The target file fd does not support epoll. This error can occur
if fd refers to, for example, a regular file or a directory.
Rich.
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