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 standard channel (stdin, stdout, or stderr), the return value from an invocation 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 recordSize 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