On Fri, Oct 13, 2017 at 4:20 PM, David Newall <openssh@xxxxxxxxxxxxxxx> wrote: > On 13/10/17 18:40, Clark Wang wrote: > >> On Fri, Oct 13, 2017 at 3:24 PM, David Newall <openssh@xxxxxxxxxxxxxxx >> <mailto:openssh@xxxxxxxxxxxxxxx>> wrote: >> >> >> ssh localhost 'exec cat > /dev/null' | { read l; echo ${l:-EOF}; } >> >> One should see "EOF" immediately (for values of immediate that >> include startup latency), but that's not what happens. >> >> >> The ssh is still alive since the remote cat is waiting for input so the >> read would not see EOF. Did you actually mean 'exec cat < /dev/null'? >> >> > The ssh is still alive since the remote cat is waiting for input. That has > zero relevance to EOF. If you still don't get it, please replace "ssh > localhost" with "sh -c" and see what should happen. > Tried with strace and see it closed fd 1 before exec. Thanks. _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
