Feedback for http://unix.stackexchange.com/a/218689

Example 1:

$ cat /tmp/test | tr '<\n' '\n<' | paste -sd\\n - - | sed  -e'/^[0-9]\{1,\}>/!{$!H;1h;$!d' -e\} -e'x;y/\n</<\n/;s//<&/'

works as expected. Output:

<37> Jul 28 10:40:47 127.0.0.1 time="2015-07-28 10:40:47" msg="LOGOUT User admin logged out on TELNET (10.0.200.1)"
<37> Jul 28 10:45:58 127.0.0.1 time="2015-07-28 10:45:58" msg="LOGIN User admin logged in on TELNET (10.0.200.1)"
<37> Jul 28 10:40:47 127.0.0.1 time="2015-07-28 10:40:47" msg="LOGOUT User admin logged out on TELNET (10.0.200.1)"
<37> Jul 28 10:45:58 127.0.0.1 time="2015-07-28 10:45:58" msg="LOGIN User admin logged in on TELNET (10.0.200.1)"

Example 2:

In terminal A

$ socat -u UDP-RECV:4321 STDOUT | tr '<\n' '\n<' | paste -sd\\n - - | sed  -e'/^[0-9]\{1,\}>/!{$!H;1h;$!d' -e\} -e'x;y/\n</<\n/;s//<&/'

In terminal B

$ cat /tmp/test | netcat -u localhost 4321

Expected output in terminal A, got nothing. Running just "socat -u UDP-RECV:4321 STDOUT" in terminal A gets output so it isn't a comms issue.

(intentional uuoc in the examples to express the syle of pipeline being used)