DOKK / manpages / debian 11 / ucspi-tcp / addcr.1.en
addcr(1) General Commands Manual addcr(1)

addcr - inserts a CR (\015) before each LF (\012)

addcr

addcr inserts a CR (\015) before each LF (\012), i.e., at the end of each line of input. It does not insert a CR at the end of a partial final line.

addcr reads input from stdin and writes to stdout.

tcpserver(1), tcprules(1), tcprulescheck(1), argv0(1), fixcrio(1), recordio(1), rblsmtpd(1), tcpclient(1), who@(1), date@(1), finger@(1), http@(1), tcpcat(1), tcp-environ(5)

http://cr.yp.to/ucspi-tcp.html