eof(n) Tcl Built-In Commands eof(n)
NAME
eof - Check for end of file condition on channel
SYNOPSIS
eof channelId
DESCRIPTION
Returns 1 if an end of file condition occurred during the most recent
input operation on channelId (such as gets), 0 otherwise.
ChannelId must be an identifier for an open channel such as a Tcl stan-
dard channel (stdin, stdout, or stderr), the return value from an invo-
cation of open or socket, or the result of a channel creation command
provided by a Tcl extension.
EXAMPLES
Read and print out the contents of a file line-by-line:
set f [open somefile.txt] while {1} {
set line [gets $f]
if {[eof $f]} {
close $f
break
}
puts "Read line: $line" }
Read and print out the contents of a file by fixed-size records:
set f [open somefile.dat] fconfigure $f -translation binary set record-
Size 40 while {1} {
set record [read $f $recordSize]
if {[eof $f]} {
close $f
break
}
puts "Read record: $record" }
SEE ALSO
file(n), open(n), close(n), fblocked(n), Tcl_StandardChannels(3)
KEYWORDS
channel, end of file
Tcl 7.5 eof(n)
tcl 8.6.0 - Generated Tue Jan 8 15:51:02 CST 2013