eof(3tcl) Tcl Built-In Commands eof(3tcl)
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NAME
eof - Check for end of file condition on channel
SYNOPSIS
eof channelId
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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 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_StandardChan-
nels(3tcl)
KEYWORDS
channel, end of file
Tcl 7.5 eof(3tcl)
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