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(3tcl), open(3tcl), close(3tcl), fblocked(3tcl), Tcl_StandardChannels(3tcl)

KEYWORDS¶

channel, end of file