07-25-2001
thnx Neo
I was just trying to check if there is any failed connections, perhaps due to fd exhausted.
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I am trying to interpret the following shellscript and am having a very difficult time. Could one of you Unix gurus pleasssseeee help me out? You just won't know how much of a life saver you would be for me.
PN=`basename "$0"` # Program name
VER=`echo '$Revision: 1.2 $' | cut -d' ' -f2`
... (3 Replies)
Discussion started by: Ann
3 Replies
2. UNIX for Advanced & Expert Users
We are having performance issues on an alpha4100 server.
I can't paste a snapshot of my vmstat in here, but...
We have 4gb of memory. The actual memory stays consistant around 306k. Free is dropping into the 120 area. Wire is around 206k consistantly. consistantly.
My manual says that unix... (3 Replies)
Discussion started by: MizzGail
3 Replies
3. Solaris
Hi all,
I wanted to know the solaris way of interpreting devices?
I mean i understand all those c0t0....stuff but when i start mounting devices , most of the times i get either a I/O error or it says that the directory does not exist.
eg:
I have a external usb hub to which i have connected... (1 Reply)
Discussion started by: wrapster
1 Replies
4. UNIX for Dummies Questions & Answers
hi all,
when I run-
wcars1j5#netstat -an | grep 8090
127.0.0.1.8090 *.* 0 0 49152 0 LISTEN
wcars1j5#
1. does this mean that no one is connected to this port?
Regards,
akash (1 Reply)
Discussion started by: akash_mahakode
1 Replies
5. Shell Programming and Scripting
Hi, i was reading through a sample coding and came across this function, can anyone pls help to interpret the code for me. Thank alot
find_lines()
{
res=-1
if ; then
grep -i "$@" $FILENAME
res=$?
fi
return $res
} (2 Replies)
Discussion started by: Cheranime
2 Replies
6. Solaris
Hi. I wonder what the equal sign in front of the answer means.
I have read man pages and googled but found no answer.
xntpdc -p
=15.5.64.3 15.5.2.51 3 512 377 0.02060 0.057426 0.04965Thanks.
Jan (1 Reply)
Discussion started by: vettec3
1 Replies
7. Shell Programming and Scripting
Hello.
I'm new to Perl and I am not sure how to interpret command line arguments in the program. I am writing a program similar to the Unix utility 'tail' and need to check if first argument is '-1' (1) or any arbitrary number of lines to output. How would I write an 'if' statement to check for... (4 Replies)
Discussion started by: D2K
4 Replies
8. Shell Programming and Scripting
Hi,
I am writing a shell script which will check the status of a resource in a cluster and then display nicely to a user running the script at command line.
Basically the script runs a status command and then pulls certain keywords from the return and then should display a concise status.
... (5 Replies)
Discussion started by: chris01010
5 Replies
9. UNIX for Dummies Questions & Answers
Hi,
I am sure some gurus will recognize what this graph is. This is provided by our SA but I can't understand his explanation. I am not sure if this is from kSar or Cacti. The link that I was given to is to a kSar directory so I am assuming this output is from kSar.
Hopefully, I can get a... (1 Reply)
Discussion started by: newbie_01
1 Replies
LEARN ABOUT CENTOS
fblocked
fblocked(n) Tcl Built-In Commands fblocked(n)
__________________________________________________________________________________________________________________________________________________
NAME
fblocked - Test whether the last input operation exhausted all available input
SYNOPSIS
fblocked channelId
_________________________________________________________________
DESCRIPTION
The fblocked command returns 1 if the most recent input operation on channelId returned less information than requested because all avail-
able input was exhausted. For example, if gets is invoked when there are only three characters available for input and no end-of-line
sequence, gets returns an empty string and a subsequent call to fblocked will return 1.
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
The fblocked command is particularly useful when writing network servers, as it allows you to write your code in a line-by-line style with-
out preventing the servicing of other connections. This can be seen in this simple echo-service:
# This is called whenever a new client connects to the server
proc connect {chan host port} {
set clientName [format <%s:%d> $host $port]
puts "connection from $clientName"
fconfigure $chan -blocking 0 -buffering line
fileevent $chan readable [list echoLine $chan $clientName]
}
# This is called whenever either at least one byte of input
# data is available, or the channel was closed by the client.
proc echoLine {chan clientName} {
gets $chan line
if {[eof $chan]} {
puts "finishing connection from $clientName"
close $chan
} elseif {![fblocked $chan]} {
# Didn't block waiting for end-of-line
puts "$clientName - $line"
puts $chan $line
}
}
# Create the server socket and enter the event-loop to wait
# for incoming connections...
socket -server connect 12345
vwait forever
SEE ALSO
gets(n), open(n), read(n), socket(n), Tcl_StandardChannels(3)
KEYWORDS
blocking, nonblocking
Tcl 7.5 fblocked(n)