I am testing tls renegotiation using this "for" loop and need to auto-answer with "R" for each iteration, I expected one of these permutations to work, neither of these is working, grateful for any suggestions
for ((i=0;i<10;i++))
do
"R" > echo `openssl s_client -connect 192.168.1.1:443`
done
for ((i=0;i<10;i++))
do
echo openssl s_client -connect 192.168.1.1:443 < "R"
done
First will not work because bash expect R to be command
Seconds will work if you send this R to the command (not to the echo):
openssl s_client -connect 192.168.1.1:443 <<< "R"
This form < will not work because it expect on the right side to be file.
(echo R; sleep 1) | openssl s_client -connect host:port to leave enough time for that R to complete a renegotiation.
– Stéphane Chazelas
Aug 23 '22 at 18:24
echo? See this. – Kamil Maciorowski Aug 23 '22 at 18:14<and>redirect from and to files, you need a pipe instead to redirect from one command to another. See also: https://mywiki.wooledge.org/BashGuide/InputAndOutput – ilkkachu Aug 23 '22 at 18:15