I am trying to ping through a list of devices in parallel.
When the code below is executed, I enter a infinite loop.
I want to used the number of lines in the file as my boundry.
I am a perl rookie and just cant see whats wrong.
would appreciate help ...
I need a quick script that will serve as a sort of "real time monitor" for watching some log files. I am using Bourne shell in HP-UX 10.20. I have basically created a script that never ends, unless of course I manually terminate it. Here's the script (it's called qhistory):
clear
echo "REAL... (3 Replies)
I run this code, actually I want to both processes print the message from "data". But only one does. What happens? Anyone can help?
#include <stdio.h>
main(){
int fd, pid;
char x;
fd = open("data",0); /* open file "data" */
pid = fork();
if(pid != 0){
wait(0);
... (2 Replies)
hello,
Every time i use fork() in the for loop, my college network(which i work in) either gets slow or hangs up.Can any 1 explain why it is so?
Of course there is no use of doing it though. But still i want to clear my doubt.
Thanks (2 Replies)
hi all
About this code
for (i = 1; i < n; i++)
if ((childpid = fork()) <= 0)
break;
I really can't understand the output .
and the way fork () return the value .
how about the process Id ,the child process Id and the parent ID
in this case
so please answer me soon (5 Replies)
Hi everybody,
I wanna write a code to understand how fork works.
my target
--------------
-Parent creates a file(called temp) and writes into this file "1".Then it closes the file.
-Then parent creates a child and wait until execution of this child ends.
-Then child opens the same... (3 Replies)
I need to write a program which creates some n number of processes first and also creates a fifo for each of them, then it connects to the server and..
I tried creating these processes with fork() in a for loop but it doesn't print out what i write inside the child..
for(int count = 0; count... (7 Replies)
Hello people.
I'm trying to do something like a search engine.
Server runs in the background by using ./server & which has data from a textfile stored in an array.
Client then runs by using ./client
It will then prompt "Search for:"
For example, if I searched for Products called Instant... (0 Replies)
I'm trying to run a simple test on how to use fork(), i'm able to execute the child process first then the parent, but how can I execute parent then child..?
Thanks! (1 Reply)
I understand that fork create a child but I need very simple example that make child useful....
I mean how will make the program faster anyone explain with code plz
using C plz (2 Replies)
Discussion started by: fwrlfo
2 Replies
LEARN ABOUT SUSE
net::server::fork
Net::Server::Fork(3) User Contributed Perl Documentation Net::Server::Fork(3)NAME
Net::Server::Fork - Net::Server personality
SYNOPSIS
use Net::Server::Fork;
@ISA = qw(Net::Server::Fork);
sub process_request {
#...code...
}
__PACKAGE__->run();
DESCRIPTION
Please read the pod on Net::Server first. This module is a personality, or extension, or sub class, of the Net::Server module.
This personality binds to one or more ports and then waits for a client connection. When a connection is received, the server forks a
child. The child handles the request and then closes.
With the exception of parent/child signaling, this module will work (with basic functionality) on Win32 systems.
ARGUMENTS
check_for_dead
Number of seconds to wait before looking for dead children. This only takes place if the maximum number of child processes
(max_servers) has been reached. Default is 60 seconds.
max_servers
The maximum number of children to fork. The server will not accept connections until there are free children. Default is 256 children.
max_dequeue
The maximum number of dequeue processes to start. If a value of zero or undef is given, no dequeue processes will be started. The
number of running dequeue processes will be checked by the check_for_dead variable.
check_for_dequeue
Seconds to wait before forking off a dequeue process. It is intended to use the dequeue process to take care of items such as mail
queues. If a value of undef is given, no dequeue processes will be started.
CONFIGURATION FILE
See Net::Server.
PROCESS FLOW
Process flow follows Net::Server until the post_accept phase. At this point a child is forked. The parent is immediately able to wait for
another request. The child handles the request and then exits.
HOOKS
The Fork server has the following hooks in addition to the hooks provided by the Net::Server base class. See Net::Server
"$self->pre_accept_hook()"
This hook occurs just before the accept is called.
"$self->pre_fork_hook()"
This hook occurs just after accept but before the fork.
"$self->post_accept_hook()"
This hook occurs in the child after the accept and fork.
"$self->run_dequeue()"
This hook only gets called in conjuction with the check_for_dequeue setting.
TO DO
See Net::Server
AUTHOR
Paul Seamons <paul@seamons.com>
Rob Brown <bbb@cpan.org>
SEE ALSO
Please see also Net::Server::INET, Net::Server::PreFork, Net::Server::MultiType, Net::Server::SIG Net::Server::Single
perl v5.12.1 2007-02-03 Net::Server::Fork(3)