RELAY_FLUSH(9) relay interface support RELAY_FLUSH(9)NAME
relay_flush - close the channel
SYNOPSIS
void relay_flush(struct rchan * chan);
ARGUMENTS
chan
the channel
DESCRIPTION
Flushes all channel buffers, i.e. forces buffer switch.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 RELAY_FLUSH(9)
Check Out this Related Man Page
tell(1T) Tcl Built-In Commands tell(1T)__________________________________________________________________________________________________________________________________________________NAME
tell - Return current access position for an open channel
SYNOPSIS
tell channelId
_________________________________________________________________DESCRIPTION
Returns an integer string giving the current access position in channelId. This value returned is a byte offset that can be passed to seek |
in order to set the channel to a particular position. Note that this value is in terms of bytes, not characters like read. The value
returned is -1 for channels that do not support seeking.
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.
EXAMPLE
Read a line from a file channel only if it starts with foobar:
# Save the offset in case we need to undo the read...
set offset [tell $chan]
if {[read $chan 6] eq "foobar"} {
gets $chan line
} else {
set line {}
# Undo the read...
seek $chan $offset
}
SEE ALSO file(1T), open(1T), close(1T), gets(1T), seek(1T), Tcl_StandardChannels(3TCL)KEYWORDS
access position, channel, seeking
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Availability | SUNWTcl |
+--------------------+-----------------+
|Interface Stability | Uncommitted |
+--------------------+-----------------+
NOTES
Source for Tcl is available on http://opensolaris.org.
Tcl 8.1 tell(1T)
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