http://purl.org/tcl/home/man/tcl8.4/TclCmd/eof.htm
Programmers can use eof to determine whether the channel has reached the end of input.
Note that it fires only after the last successful gets, so testing for a -1 return value on gets may be a better idea:
while {[gets $fp line]>=0} {...}
instead of
while {![eof $fp]} { gets $fp line if [eof $fp break] ;# otherwise loops one time too many ... } ;# RS
Can anyone indicate whether there are certain types of channels (pipe, socket, etc.) where eof doesn't do what one might at first blush expect?
Tcl syntax help - Arts and crafts of Tcl-Tk programming - Category Command