Version 7 of fconfigure

http://purl.org/tcl/home/man/tcl8.5/TclCmd/fconfigure.htm

See also channel and open.

An important use is

  fconfigure $binaryDataFile -translation binary

to make sure the file is read as binary data.

LV 2008 Feb 28

Some of the wiki pages talk about the construct

fconfigure $serial_port -mode "$baudRate,$plex,$bits,$polarity"

or some such thing. The -mode flag, used for specifying baud rate, etc. has moved to open now. I don't know how one would change those values on an open descriptor...