QNX communications protocol (QNX)
qcp [device] se [options] src_file[,dst_file]... [x=index_file]...
qcp [device] re [options] [-f filename|-p prefix]
The qcp utility provides an error-checked file transfer protocol that qtalk uses to transmit or receive files. This protocol is both highly efficient on packet switched networks and highly reliable through the use of 16-bit CRCs (Cyclic Redundancy Check).
The qcp utility automatically sends files with their pathnames, attributes, permissions, and date fields intact. The qcp protocol is ideally suited for use over public packet switch networks (X.25), as well as direct modem-to-modem connections. If communication errors are encountered, portions of the file are automatically resent until the far end acknowledges correct reception of the file.
If you're using qtalk to communicate with a remote system, you can both send and receive files to the remote system with the qcp utility. To cause a file to be sent from the remote system to your local system, type a command of the following form into the qtalk session you have connected to the remote system:
qcp se file1 file2,file3 x=file4
This causes the remote end to send the files to you; qtalk automatically starts qcp to receive the file. The files sent are:
|You can create index files easily with the ls -p command.|
To send a file to the remote system, type the following command into the remote shell:
then use the Ctrl-A Ctrl-S key sequence to cause qtalk to send a file to the remote qcp utility.
If you want qcp to send a file through an explicitly named device, use a command of the form:
qcp /dev/ser1 se filename
where /dev/ser1 is the port to send through. To receive from a particular device, use a command similar to:
qcp /dev/ser1 re
You can abort a qcp file transfer in progress by pressing either Esc or Space. In turn, qcp displays a prompt asking for confirmation of the action. To confirm aborting qcp, you enter y. If a remote qcp in a receive state must be shut down, the following control-character sequence aborts it:
Note that qcp automatically removes any partially transferred files.
|When you're transferring files via high speed modems, the -s 16000 option is recommended.|