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, open, close, fblocked, Tcl_StandardChannels

KEYWORDS

channel, end of file 
Copyright © 1993 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.
Copyright © 1995-1997 Roger E. Critchlow Jr.