General :: Xinetd Server Configuration - Infinite Loop?
Apr 14, 2011
I have a java server console program that I have configured xinetd to start when connection comes in on a given port and then the program runs in an infinite loop receiving inputstream from telephone exchanges. The thing is, when a new chunk of stream comes from the exchange xinetd forks a new process each time. I tried setting the wait parameter to yes and restarted the deamon, but no success. How can I stop this behavior and have the deamon just direct the stream to the process already running? Am I missing something in my config or is it just incorrect?
My config is as follow:
defaults
{
instances = 60
log_type = SYSLOG authpriv
log_on_success = HOST PID
log_on_failure = HOST
cps = 50 10
}
includedir /etc/xinetd.d
And then my actual config,
service aos_larmar
{
socket_type = stream
protocol = tcp
user = root
type = UNLISTED
wait = yes
instances = 256
server = /home/gunnl/java/start.sh
port = 5204
disable = no
}
My server OS is, Red Hat Enterprise Linux ES release 4 (Nahant Update 7)
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Oct 27, 2010
i was playing around with c++ recently and for laughs and giggles i came up with this little program
Code:
#include <iostream>
using namespace std;
int main ()
{
[Code]....
theoretically that should be an infinite loop but it in fact does terminate eventually echoing out 'FIRE!'
just wondering if even though in theory this should be an infinite loop (a number repetedly divided by 2 should never reach 0 thus the conditions of the loop should never be satisfied, hence infinite loop) perhaps in practice limitations of the variable types prevent this?
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Aug 19, 2009
there's 2 scripts that i want to run when my server start.I a bit new to linux, i found that i could use the script rc.local to run things at startup, although, what i want to run is 2 infinite loop, so the first loop run but not the second.
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Oct 28, 2010
It happens really randomly. Suddenly keyboard and mouse stop to react. Screen freezes. However if I have for instance skype running during that "crash", I can still continue to talk over internet. For me looks like x serwer crash. Xorg logs however are empty. I had to hard reboot only to get control over pc (magic sys key + SUB) only works. Trying switch to another session is not working. I run Slackware 13.1. Kindly asking to help me to solve that irritating issue. I pasted errors usually I find at Xorg.0.log.old after hard reboot only
Code:
2.6.35.4 #2 SMP Tue Sep 14 19:33:55 CEST 2010 i686 Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz GenuineIntel GNU/Linux
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce 8800 GT/PCI/SSE2
OpenGL version string: 3.2.0 NVIDIA 195.36.15
OpenGL shading language version string: 1.50 NVIDIA via Cg compiler
[Code]...
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Sep 16, 2010
I have recently been running into the "EQ overflowing" message. It has been happening when I open an image with gimp or a xls with open office. I noticed some were having this issue with earlier kernels. I am using the nouveau driver to run two nvidia cards with three monitors. I am currently running the 2.6.34.6-54.fc13.x86_64 kernel. Here is the output of my Xorg.0.log file:
[Code]...
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Mar 17, 2010
I want to figure out what is going on in this small script.Its really strange.I think its the infinite loop again.All I want to do is to collect some data from the zenity dialog box in an array and then echo it.Here is the code
Code:
#!/bin/bash
#export PS4='+${BASH_SOURCE}:${LINENO}:${FUNCNAME[0]}: ' debugging info
[code]...
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Jan 13, 2010
When running a program that has infinite loops in the terminal , how to bring back the command prompt ? ( I'm using Fedora core 5 )
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Mar 25, 2010
I think i came across a bug in X server in squeeze. I would report it to the bug tracking system in debian packages but the think is I am not entierly sure about it.When i start X (whether it is through startx or service gdm start or auto startup through init when the pc boots) the computer PC seems to lock up.The screen goes black right after X initializes and before anything is show in the screen and if i wait a about 10 minutes the monitor either goes in standby or out of range. PC seems unresponsive to both keyboard commands and mouse but my LCD screen in my G15shows the time skips 1 sec every 2 sec (from 19:22:22 goes straight to 19:22:24).
I have a custom 2.6.33 kernel which i build but it happens with both 2.6.32-trunk and 2.6.32-3 offical kernels from the squeeze repository so i dont think that this is the problem.My PC is a P4 3.75Ghz with 2Gb RAM and an NVidia 6800GT with the binary drivers from nvidia. I have tried diffrent versions from my grapgics drivers (NVIDIA-Linux-x86-173.14.25-pkg1.run & NVIDIA-Linux-x86-195.36.15-pkg1.run) with no change in the behaviouThis is the syslog from the time my pc started and then "stuck". I left it for some time before i hard reset it
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Apr 1, 2011
I am trying to develop a process monitor, or use existing monitors to achieve the below given actions.
1) Restart a processes if it crashes.
2) Restart a processes if it is stuck in an infinite loop.
The sample code below describes the structure of the process.
while(1)
{
statement 1....
statement 2....
while (1)
{
[Code].....
The goal is to restart the process if it is stuck in a loop, inside the outer while loop. Given this scenario, what would be the most efficient way to monitor such a process?
A sample solution would look something like this: statement 3 will write to file1 every time it is executed and we know that the maximum execution time of the outer while loop is 30 seconds. A second, timer driven process, checks for file1 being modified every 30 seconds. If the file is not modified, process 1 will be restarted assuming, process1 is stuck in a while loop.
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Jun 3, 2010
I'm using debian etch and I've installed some automatic updates, after that some programs weren't running. So I restarted the pc. Now that the computer boot up normally but when it reaches the login screen it just emit a sound in the pc's speaker,he login screen flickers and is showed another login screen again and again and again (it's automatic). I can logon using the option single-user mode in the grub options, any idead on how can I fix it?
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Jan 26, 2011
When I boot one of my machines, it gets as far as GRUB, then proceeds to a blank screen for a second, and then repeats the cycle all over again - ad infinitum. I have tried previous kernels on the list with the same results Also, I cant boot into recovery mode either.
I have run Memtest successfully from the GRUB options and no errors appear in the results. I have tried booting from a Live CD and here I get as far as the "OS choosing screen". When I then select one and hit Enter, the screen goes blank and the machine reboots as before.
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Feb 15, 2011
I upgraded to 10.10, system rebooted but it is stuck at a constant loop.
I can go into safe graphics mode and things look fine except compiz isn't running. I have tried going into login and changing it to log me in automatically but the problem remains.
I've tried using my previous kernal and I have the same issue as this newer one.
I've tried loading gdm from CLI and the problem is still there.
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Apr 18, 2011
I'm doing a dual boot Ubuntu 11.04 and Windows 7 on my Asus UL80v. When I restart and keep going into Ubuntu I'm fine, but I think if I go to Windows and then restart, the infinite start up happens, and I'm currently stuck in this. It'll go to the OEM screen, then a black screen with a cursor, then it goes black, and then back to the OEM screen and so on and so forth.
Luckily I have Ubuntu 10 on my flash drive, so I'm booting to that while I try to figure out this. Which reminds me, when I use the flash drive, there's an option to boot to local disk which also does not work, if that's worth anything. Before this happened, I ran check disk on windows because I ran into some partition troubles. There seemed to be no problems, and I can still access the drives from this flash Ubuntu.
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Jun 25, 2011
I installed Xubuntu and was thrilled to see that it had already setup my Brother HL-2140 USB laser printer.However, there is something seriously wrong with the setup. When you try and print, even a test page - it just churns through the entire paper tray printing nothing. Also, when you restart the computer it tries to print the jobs again. I went to Printing and selected the printer but could not find where you could see the print job queue. I did see it during troubleshooting and was able to delete the jobs on the troubleshooting screen.
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Aug 17, 2011
Fedora 15, fresh install.I changed the wallpaper from default to a solid colour. After switching between gradient to colour the system crashed logged me out and upon logging in it simply runs endlessly accessing my harddisk but never actually loading the desktop.I can kill X and reboot, but it's the same problem waiting for me on restart. I really don't want to re-install or delete users (to put it in context, I just spent 3 days trying to install Fedora because Anaconda doesn't know how to install GRUB correctly).
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Oct 20, 2010
I have just upgraded from 10.4 to 10.10 (x64), and now when I run gnu screen the new shell session goes into an infinite loop displaying:
Quote: Linux dave-desktop 2.6.35-22-generic #35-Ubuntu SMP Sat Oct 16 20:45:36 UTC 2010 x86_64 GNU/Linux
Ubuntu 10.10
Welcome to Ubuntu! * Documentation: [URL]...
0 packages can be updated.
0 updates are security updates.
repeatedly until I hit CTRL-C and break out of screen. I tried tmux and that did the same thing, so it is a problem with the shell initialisation rather than with the screen program. However I can start bash, zsh or sh directly in a terminal with no problem.
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Apr 24, 2009
I installed Subversion and xinetd and added Subversion as a service to xinetd.conf as instructed at http://www.codeandcoffee.com/2007/06...rver-on-linux/
I restarted the xinetd service using /sbin/service. however, Subversion does not end up being listed in /etc/xinetd.d nor does it seem to be running and occupying the port altogether.
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Jul 21, 2009
I've been reading the RUTE Linux book and they recommend the use of xinetd to run services. However, this book is already a bit outdated, and I was wondering whether this still applies to today's circumstances?
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Mar 24, 2010
I'm just trying to figure out what is going on with FC12
Here is the error:
[root@localhost bigmac]# rkhunter --check
Invalid XINETD_CONF_PATH configuration option - non-existent pathname specified: /etc/xinetd.conf
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Sep 1, 2010
I have a mytext file with month and year as two separate fields. likemytext fil
08 2010
09 2010
10 2010
........
........
........
I want to read the values of each field i.e., month and year into an awk script.
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Apr 28, 2009
If i run /usr/bin/foo through xinetd and have /etc/xinetd.d/foo conf file something like:
1 service foo
2 {
3 port = 3691
4 socket_type = stream
5 protocol = tcp
6 wait = no
7 user = www-data
8 server = /usr/bin/foo
9 server_args = -x
10 }
Is /usr/bin/foo supposed to be listed in the list of all processes on that machine (ps aux)? i added the conf file, bouced xinetd daemon via /sbin/service, yet foo does not seem to be running. the xinetd doc online seems pretty incomplete.
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Jun 26, 2011
I have a small stats program that I am using to get some sys stats. I am trying to launch this program on a particular port, using the xinetd system deamon. Here is what I am doing ...
[Code]///
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Jan 26, 2011
I am trying to configure SNMP server using xinetd on red hat. I am using non-standard port for it. My connection to server fails. I see the following log messages in /var/log:
Jan 26 17:23:31 [userid] xinetd[15023]: START: my-snmp pid=15047 from=192.128.11.21
Jan 26 17:23:31 [userid] xinetd[15023]: EXIT: my-snmp status=1 pid=15047 duration=0(sec)
Jan 26 17:23:32 [userid] xinetd[15023]: START: my-snmp pid=15050 from=192.128.11.21
Jan 26 17:23:32 [userid] xinetd[15023]: EXIT: my-snmp status=1 pid=15050 duration=0(sec)
can anybody help to point out what is wrong in my config?
[Code]...
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Nov 26, 2010
in Debian Lenny, using TightVNC 1.3.9 I can setup a VNC server manually by using
Code:
vncserver -query localhost -once -geometry 1024x768 -depth 16 :1
But then, as I have read is a better option, I use xinetd with the following configuration:
Code:
service vnc-1024x768x16
{
protocol = tcp
socket_type = stream
wait = no
[Code].....
In fact, I was considering that the problem was with xinetd, but I have other services setted up with it (telnet & ftp for example) and I can use them correctly.
So now I'm lost with this, what else am I not considering with VNC service through xinetd? Where can I find logs or useful information to get a clue about this problems?
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Jul 18, 2009
yesterday I installed my first CentOS system. Before I was always using Debian for my servers. When I configured my vsftpd I was just wondering how to setup xinetd or inetd for listening on ports and starting vsftpd. I found /etc/xinetd.d. But there is no xinetd installed by default. Why? Shall I start all my services in standalone mode? What is the concept of CentOS in this issue?
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Feb 2, 2010
I found a way to capture emails sent from my Drupal installation, and Fakemail seems simple enough. I can follow the tutorial. Since the application Fakemail needs to be running to capture the outgoing emails, it seems like a good candidate for xinetd, yes? I've found a simple config tutorial describing starting the service and what the parameters are for the service-specific configuration files. This got me this far,
Code:
# default: on
# description: This is a script to start the Sandbox app "fakemail"
service fakemail
[code]....
But the service is not starting up. Will someone help me with this config file? Or, recommend another application which uses a similar configuration like Sendmail so I can copy this The Fakemail application/service is started from command line like so,
# fakemail.py --host=localhost --port=10025 --path=[path_to_email_textfile]
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Aug 3, 2011
I found a way to capture emails sent from my Drupal installation, and Fakemail seems simple enough.
I can follow the tutorial. Since the application Fakemail needs to be running to capture the outgoing emails, it seems like a good candidate for xinetd, yes?
I've found a simple config tutorial describing starting the service and what the parameters are for the service-specific configuration files. This got me this far,
Code:
# default: on
# description: This is a script to start the Sandbox app "fakemail"
service fakemail
{
[Code]....
But the service is not starting up.
Or, recommend another application which uses a similar configuration like Sendmail so I can copy this
The Fakemail application/service is started from command line like so,
# fakemail.py --host=localhost --port=10025 --path=[path_to_email_textfile]
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Aug 13, 2010
Is there a way to limit the time an instance of a service can run? For example, I want to limit all telnet sessions to 30 mins. Users will be automatically logged out after 30 mins.
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Apr 11, 2011
How to print "hello" infinite times without using implicit or explicit loop.
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Jan 6, 2010
I have installed bootpd-dd2 and enabled and configured it with xinetd. 1. Made sure that their is a bootptab file and it is configured. 2. Tested the bootpd is working by runing the command /usr/sbin/bootptest cmdbfs .3. tail -f the /var/log/messages and saw the requests from the test.4. rebooted a machine that is configured to pxe boot.there is no messages by bootpd when a request is made.request is picked up by network monitor on a seperate computer on the proper udp port
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