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Full Discussion: character and block files
Special Forums Hardware Filesystems, Disks and Memory character and block files Post 38030 by PCk on Friday 4th of July 2003 02:30:29 AM
Old 07-04-2003
character and block files

Hello,

I want to write a process to catch data from my serial port, format it, and write it to a file that other processes can access just like any other file.

My problem is I don't want to just append the data to a file because of the disk space required. I would rather the data be available for other processes then just flushed.

Could I do this with an unbuffered character file? If not, any suggestions? If so, can you give me some tips on how to create it and pipe data to and from it? I have no problem accessing the serial port and formatting my data- just a hint of how to open the special file and write to it.

TIA for all your help! Smilie

PCk
 

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TTYSRV(8)						      System Manager's Manual							 TTYSRV(8)

NAME
ttysrv - connect to a serial port and log output SYNOPSIS
ttysrv [-o option] [-s sock] [-l log] -t tty [-b baud] [-p parity] [-w wordsize] [-i pidfile] DESCRIPTION
ttysrv is the backend for rconsole. It connects to the serial port, handles the log file and waits for connections from rconsole to view what's happening on the serial console. OPTIONS
-t tty Specify which device to connect to. -s sock The name of the socket to listen for connections from rconsole on. -o option Specify any ttyios options to open the port with. Currently only nolocal is supported. -l log The logfile to write to. If not set then no log is kept. -b baud Set the baud rate to talk to the port at. Defaults to 9600. -p parity Set the parity for the serial port. Defaults to none. -w wordsize Set the word size for the serial port. Defaults to 8 bits. -i pidfile The file to write the pid of ttysrv to. If not specified no such file is written. SEE ALSO
rconsole(1), remote-tty(1). AUTHOR
rtty was written by Paul Vixie <vixie@isc.org>. This manual page was written by Jonathan McDowell <noodles@earth.li> for the Debian project (but may be used by others). May 23, 2006 TTYSRV(8)
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