On 1/11/22 02:30, Damien Miller wrote: > On Tue, 11 Jan 2022, Damien Miller wrote: > >> Here's the client side log of the failure. It comes from the >> "same with early close of stdout/err" section of the test, but I can't >> actually see anything get closed... >> >> debug3: receive packet: type 91 >> debug2: channel_input_open_confirmation: channel 0: callback start >> debug2: client_session2_setup: id 0 >> debug1: Sending command: exec sh -c 'sleep 2; exec > /dev/null 2>&1; sleep 3; exit 0' >> debug2: channel 0: request exec confirm 1 >> debug3: send packet: type 98 >> debug2: channel_input_open_confirmation: channel 0: callback done >> debug2: channel 0: open confirm rwindow 0 rmax 32768 >> debug2: channel 0: rcvd adjust 2097152 >> debug3: receive packet: type 99 >> debug2: channel_input_status_confirm: type 99 id 0 >> debug2: exec request accepted on channel 0 >> channel 0: invalid rfd pollfd[2].fd 4 r4 w7 e8 s-1 >> >> and (separate run) with DEBUG_CHANNEL_POLL set: >> >> debug2: channel_input_status_confirm: type 99 id 0 >> debug2: exec request accepted on channel 0 >> debug3: dump_channel_poll: channel 0: rfd r4 w7 e8 s-1 pfd[2].fd=4 want 0x01 ev 0x01 ready 0x00 rev 0x00 >> debug3: dump_channel_poll: channel 0: rfd r4 w7 e8 s-1 pfd[3].fd=7 want 0x01 ev 0x00 ready 0x00 rev 0x00 >> debug3: dump_channel_poll: channel 0: rfd r4 w7 e8 s-1 pfd[4].fd=8 want 0x01 ev 0x00 ready 0x00 rev 0x00 >> debug1: channel_after_poll: pfd[2].fd 4 rev 0x0020 >> debug3: dump_channel_poll: channel 0: rfd r4 w7 e8 s-1 pfd[2].fd=4 want 0x01 ev 0x01 ready 0x00 rev 0x20 >> channel 0: invalid rfd pollfd[2].fd 4 r4 w7 e8 s-1 >> FAIL: exit code (with sleep) mismatch for: 255 != 0 >> >> It looks like it fails with HAVE_POLL set to 0 too. >> >> Still looking... > > Wow, it looks like Darwin's poll(2) is completely broken for character- > special devices (at least). E.g. the attached program spins shows similar > behaviour when run on /dev/null - it spins, returning revents=POLLNVAL. Is using kqueue(2) an option? That’s faster, and it doesn’t have the problem with large file descriptors that poll(2) has. -- Sincerely, Demi Marie Obenour (she/her/hers)
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