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QNX communications protocol (QNX)
Send files:
qcp [device] se [options] src_file[,dst_file]...
[x=index_file]...
Receive files:
qcp [device] re [options] [-f filename|-p prefix]
Neutrino
- device
- Pathname of serial device to use. The default is the device connected
to stdin and stdout.
- -f filename
- Force received files to have this name.
- -F
- Required to receive files on a flash filesystem that
doesn't support all the POSIX file control mechanisms.
- -l logfile
- (“el”) Append the file transfer event to the logfile.
- -m
- Suppress making directories for received files.
- -n
- Receive only files that are newer than existing files.
- -p prefix
- Place this path prefix on the names of any received files.
- -q
- Be quiet; display nothing during the transfer.
- -r
- Relax timing; double timeouts and quadruple retry counts.
- -s packet_size
- The size of transmitted data bursts (default is 2048 bytes).
- -t
- Apply today's date to received files.
- -u
- Unlink files that lack write permission. This allows new versions of
the affected files to be received and written to disk.
- -V, -v
- Be verbose; display the error status while transferring files.
- x=index_file
- A list of filenames; qcp sends each file named in the list.
You can specify multiple x=index_file options
specified and intermix them with singly named files to transmit.
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:
- file1
- file2 (file2 is received with
the filename file3)
- all the files named in the index file file4.
|
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:
qcp re
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:
^V^X^X
Note that qcp automatically removes any partially
transferred files.
|
When transferring files via high speed modems, the -s 16000
option is recommended. |
ls,
qtalk
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