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eof

Check for end of file condition on channel

eof.9.man

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Manpage of eof

eof

Section: Tcl Built-In Commands (n)
Updated: 7.5
Index Return to Main Contents

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"
}