09-01-2009
Hi !
Tanks for your quick reply
I tried but no luck.
It is not replacing the word
sed -e "s/option \'channel\' \'5\'/option \'channel\' \'8\'/g" abc1
This is what my command.
My file is something like this.
config 'wifi-device' 'wifi0'
option 'type' 'atheros'
option 'disabled' '0'
option 'channel' '5'
option 'hwmode' '11b'
option 'diversity' '0'
config 'wifi-iface'
option 'device' 'wifi0'
option 'network' 'lan'
option 'ssid' 'OpenWrt'
option 'mode' 'adhoc'
option 'encryption' 'none'
Thanks
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null(n) null(n)
__________________________________________________________________________________________________________________________________________________
NAME
null - Create and manipulate null channels
SYNOPSIS
package require Tcl
package require memchan
null
_________________________________________________________________
DESCRIPTION
The command described here is only available in a not-yet released version of the package. Use the CVS to get the sources.
null creates a null channel which absorbs everything written into it. Reading from it is not possible, or rather will always return zero
bytes. These channels are essentially Tcl-specific variants of the null device for unixoid operating systems (/dev/null). Transfer-
ing the generated channel between interpreters is possible but does not make much sense.
OPTIONS
Memory channels created by null provide one additional option to set or query.
-delay ?milliseconds?
A null channel is always writable and readable. This means that all fileevent-handlers will fire continuously. To avoid starvation
of other event sources the events raised by this channel type have a configurable delay. This option is set in milliseconds and
defaults to 5.
A null channel is always writable and never readable. This means that a writable fileevent-handler will fire continuously and a readable
fileevent-handler never at all. The exception to the latter is only the destruction of the channel which will cause the delivery of an eof
event to a readable handler.
SEE ALSO
fifo, fifo2, memchan, random, zero
KEYWORDS
channel, i/o, in-memory channel, null
COPYRIGHT
Copyright (c) 1996-2003 Andreas Kupries <andreas_kupries@users.sourceforge.net>
Memory channels 2.2 null(n)