ref: cabbe0a84c7aae53316347185a5bdf8095bac9c8
dir: /sys/man/8/cec/
.TH CEC 8 .SH NAME cec \- Coraid Ethernet Console .SH SYNOPSIS .B cec [ .B -dp ] [ .B -S .I srv ] [ .B -c .I esc ] [ .B -e .I ea ] [ .B -h .I host [ .B -s .I shelf ] [ .I interface ] .SH DESCRIPTION .I Cec uses raw Ethernet packets to connect to a CEC server for console access. All clients share the same session. Coraid appliances and Coraid Plan 9 kernels can currently be CEC servers. .PP .I Cec starts by probing the specified network interface for available CEC servers. The default is .BR /net/ether0 . Only one .I cec process may be run per Ethernet interface. If the server is specified with the .BR -b , .BR -h , or .B -s options, communication will proceed immediately upon discovery of the first CEC server with the specified address. Otherwise, a selection prompt will be displayed showing the discovered CEC servers available for communication. Unless the .B -p option is specified, .I cec exits if no matching servers are found. The selection prompt accepts .LP .TF "\fInumber " .TP .I number Connect to server .I number (from the first column), .TP .B p Probe the interface again, and .TP .B q Quit. .PD .PP Note the selection number is not the shelf address but the .IR cec -generated sequence number printed in the leftmost column. .PP Once connected to a CEC server, typing the escape character will drop the user into an escape prompt where the user may type .L q to quit the connection, .L i to send the escape character across the connection, or .L . to continue the connection. .SS Options .TP .B -c Set the escape character to .RI control- esc . The default setting is control-\e. .TP .B -d Print debugging information. .TP .B -e Connect to the server with Ethernet address .IR ea ; implies .BR -p . .TP .B -h Connect to the server .IR host . Note that this name might not be the same as the contents of .L /dev/sysname on the target system. .TP .B -p Persist: continue trying to connect even if there are no matching servers. This is useful when connecting to a CPU server before it boots. .TP .B -s Connect to the server at address .IR shelf . .TP .B -S Post the CEC connection as .BI /srv/ srv to allow sharing. .PP If the .BR -e , .BR -s , or .B -h options are given, .I cec will exit upon closing the connection. Otherwise, .I cec will return to the selection prompt upon connection close. .SH EXAMPLES .IP .EX ; cec '#l1/ether1' 0 1 003048679b89 [#qp]: 0 SR shelf 1> SR shelf 1> >>> q 0 1 003048679b89 [#qp]: q ; .EE .SH SOURCE .B /sys/src/cmd/cec .\" .SH "SEE ALSO" .\" .IR cec (3) .SH BUGS The CEC protocol should be integrated with the console server. The arbitration between the keyboard and network is suboptimal. .PP Early boot information and very late crash information from servers may be lost due to timing quirks.