04-10-2006
Please read our
rules and note:
(6) Do not post classroom or homework problems.
I will close both of your threads.
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
my lecturer want to do an assignment about telnet server..first, he want us to download the telnet server..then he want we do about copy files and share files by using the telnet server....what is that??? and one more thing is how to do 'ping'???? (1 Reply)
Discussion started by: amelia
1 Replies
2. Shell Programming and Scripting
Hey folks! I'm trying to run a tcpdump command that monitors for possible malicious traffic. I want to be able to run this on any of several remote boxes that I monitor which all have different capture interfaces. I've gotten the script to the point where it logs into the box and attempts to run... (8 Replies)
Discussion started by: JASI
8 Replies
3. Shell Programming and Scripting
Hi guys,
I'm basically looking for some help with a bash script I've written. It's purpose is to assign process to individual CPU cores once that process hits 15% CPU usage or more. If it drops below 15%, it's unassigned again (using taskset).
My problem is that I can't think of a way to... (2 Replies)
Discussion started by: mcky
2 Replies
4. Shell Programming and Scripting
Hi,
please advise a script/c program for following:
write program p1 which will create shared memory to hold an integer value and will create One child process inside child process run another program say p2 .now p2 will continuousiy assign value 15 to shared memory created by p1. Program p1... (1 Reply)
Discussion started by: fed.linuxgossip
1 Replies
5. Homework & Coursework Questions
1. The problem statement, all variables and given/known data:
Hi,
please advise a script/c program for following:
write program p1 which will create shared memory to hold an integer value and will create One child process inside child process run another program say p2 .now p2 will... (1 Reply)
Discussion started by: fed.linuxgossip
1 Replies
6. Shell Programming and Scripting
Hi There,
I am writing a ksh script which assigns variable values from file "A" and passes that variables to file "B". While passing the parameters an additional "$" sign is being assigned to awk -v option.
Could any one help me with this please.
#!/bin/ksh
head -1... (3 Replies)
Discussion started by: Jeevanm
3 Replies
7. Homework & Coursework Questions
Q-1
Write a shell script in Unix that lists files from your current working directory
· By modification time when called with lm
· By access time when called with la.
By default, the script should show the listing of all the files in the current directory.
Q-2
Write a shell script which... (1 Reply)
Discussion started by: Vishank Parikh
1 Replies
8. Shell Programming and Scripting
Here's the assignment. I'll bold the parts that are rough for me. Unfortunately, that's quite a bit lol. The syntax is, of course, where my issues lie, for the most part. I don't have a lot of programming experience at all :/. I'd post what I've already done, but I'm so lost I really don't know... (1 Reply)
Discussion started by: twk101
1 Replies
9. UNIX for Dummies Questions & Answers
Hello all im currently working on this assignment and a little stump on how to check for an argument heres the instructions:
Step 4:
Modify your script so that if there is an argument called TestError you display the following error message with your usage statement.
TestError found
Example:... (1 Reply)
Discussion started by: bsn3971
1 Replies
LEARN ABOUT DEBIAN
ns_thread
ns_thread(3aolserver) AOLserver Built-In Commands ns_thread(3aolserver)
__________________________________________________________________________________________________________________________________________________
NAME
ns_thread - commands
SYNOPSIS
ns_thread begin script
ns_thread begindetached script
ns_thread get
ns_thread getid
ns_thread wait tid
ns_thread yield
_________________________________________________________________
DESCRIPTION
ns_thread begin:
begins a new thread which evaluates the specified script and then exits. It returns a thread ID that must eventually be passed to
ns_thread wait. (Failing to call ns_thread wait will eventually result in no new threads being created.)
ns_thread begindetached:
begins a detached thread that doesn't have to be (and can't be) waited for.
ns_thread get:
gets the thread ID of the current thread. The result is a thread ID that can be passed to ns_thread wait and may look something like
"tid532".
ns_thread getid:
gets the thread integer number for the current thread. The result is a small integer used for identifying threads is a human-read-
able way, such as "1" or "1120", for example.
ns_thread wait:
waits for the specified thread to exit. The tid argument is a thread ID returned by ns_thread begin or ns_thread get.
ns_thread yield:
causes the current thread to yield.
EXAMPLES
This example is similar to the example under the ns_sockselect function of connecting to the 10 servers and waiting to service them with
the ns_sockselect command. In this case, though, each connection gets it's own thread.
# This is the procedure which is evaluated for each thread and # handles a single connection to host number $i
proc getpage {i} {
global pages
# new thread will start here - first connect to host
set host [format "www%2d.foo.com" $i]
set fds [ns_sockopen $host 80
set r [lindex $fds 0]
set w [lindex $fds 1]
# next, send request 0r"
puts $w "GET /index.htm HTTP/1.0
flush $w
# then read page
set pages($i) [read $r]
# and close sockets
close $w
close $r
# thread goes away here and other threads waiting
# on ns_thread wait will wakeup }
# Here's the loop which creates the threads which run getpage. for {set i 1} {$i < 9} {incr i} {
set tids($i) [ns_thread begin "getpage $i"] }
# wait for the threads to exit and then process the pages for {set i 1} {$i < 9} {incr i} {
ns_thread wait $tids($i)
# output page
... process the page in $pages($i) put there by other thread ... }
Note that the code here is much simpler to follow than the ns_sockselect example; that's the benefit of multithreaded programming. However,
it uses more resources as threads need to be created and initialized. This can be a problem if you plan to create many threads.
SEE ALSO
KEYWORDS
threads
AOLserver 4.0 ns_thread(3aolserver)