General :: Support For POSIX Trace?
Oct 14, 2010Is it possible to add support for POSIX Trace to my Ubuntu?
# getconf _POSIX_VERSION
200809
# getconf _POSIX_TRACE
undefined
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General :: Set Distro To Be A POSIX Compliant?
Oct 2, 2010How to set you distro to be a POSIX compliant?
View 3 Replies View RelatedGeneral :: How To Trace And Remove Intruders
Jan 9, 2010When I log into Mint8 ,for example, the bottom bar (task bar) shows activity I did not start eg, keyboard amongst others. System logs are suspicious:
an 9 22:23:24 patti-desktop dhclient: DHCPACK of 192.168.0.100 from 192.168.0.1
Jan 9 22:23:24 patti-desktop dhclient: bound to 192.168.0.100 -- renewal in 40777 seconds.
Jan 9 22:23:24 patti-desktop NetworkManager: <info> DHCP: device eth0 state changed preinit -> bound
[code]....
'patti-desktop' is not the user I'm trying to login to but its was and still exist a group (ops). Also having difficulty using sudo but that might be my error. Is there a program I can use see what is going wrong correct it.
General :: Turn Trace Off In Apache /2.0.52
Jun 20, 2011I am trying to turn Trace off on Apache/2.0.52. From one of the previous postings on this site it was stated that TraceEnable should be used for newer version of Apache (1.3.34+ or 2.0.22+). However, when I tried to use the man pages to get some information on how to use the command I got "No manual entry for TraceEnable". Can you tell me what version(s) of Apache supports this command?
View 8 Replies View RelatedGeneral :: Trace Time / Host / Ip Address?
Feb 20, 2010if we wish to know who connect what time and from what host or ip address and logout and what he did, or what was activities.
View 9 Replies View RelatedGeneral :: Trace Of Runtime Activities In UNIX?
Mar 28, 2011I've taken a project to work upon tracing of runtime activities on unix system into a log file. Like, to implement a program which will show the log of everything happened in past, including many requirements, like applications i used (with the time of access), kind of files/directories i opened, closed, created, deleted(with the time), etc.
View 2 Replies View RelatedGeneral :: Send Mails Status Says Its Sent But Can't Trace Or Find The Mail
Jan 13, 2010I am trying to send a mail using sendmail, status says sent and quied for delivory but I am unable to find the message where it gone to or where it is.
I am using Redhat 5.4
My domain is -- mydomain
my host - redhat
Jan 13 23:41:05 redhat sendmail[4116]: o0DIB3bE004116: from=root, size=53, class=0, nrcpts=1, msgid=<201001131811.o0DIB3bE004116@mydomain.co.rw>, relay=root@localhost
[Code]....
I dont understand this last line (I think) it says the mail sent but and quied. Where is he quing, is it on the remort mail relay or in the local machine
I used mailq and mailq -AC both shows 0 entries
General :: Install Proxy - Apache - Server - Trace The User Activities ?
Sep 3, 2009OS :red hat 4.2 oracle EBS SUITE Applications:11.5.10
Iwould like to install Proxy(Apache) server on linux.is it possible?
I would like to trace the user activities by proxy server. we are running many applications on that.How to trace that.is there any server better than Apcache?
General :: Ubuntu Can't Support A Higher Resolution That Laptop Can Support?
Apr 14, 2010I have a HP laptop which can support 1600x900. But after I install ubuntu 9.10 on it, it can only support up to 1280x700. My laptop has a Nvidia graphics card. And i am using GNOME as my desktop environment.
View 1 Replies View RelatedDebian :: Posix Related During Compilation?
Sep 4, 2011I am trying to compile splasutis in my debian wheezy. ./configure run well, but during make I get the following error
make --silent all-recursive
Making all in libs
CONF libjpeg.a
[code]....
Ubuntu :: How To Enable POSIX Shared Mem
Jan 29, 2010I found out from here that it is not enable URL...I ran the command mount | grep "shm" and got.none on /dev/shm type tmpfs (rw,nosuid,nodev)So how do I enable it?It is need for my ATI graphic card.
View 2 Replies View RelatedUbuntu :: When Does The POSIX Thread Start
Feb 3, 2010i'm trying to understand the POSIX threads and i can't understand when does the thread start: does it start when i do
pthread_create()
or when i do
pthread_join()
or maybe i'm missing something. i do understand that pthread_join() causes the calling thread to wait till the called thread is finished.
Server :: Use Phpldapadmin Can Add Ou,but Cannot Add Posix Group?
Mar 27, 2010use phpldapadmin can add ou,but can not add posix group.following is software version
[root@localhost config]# rpm -qa | egrep '(ldap|db4)'
openldap-devel-2.3.27-8.el5_1.3
db4-utils-4.3.29-9.fc6
[code]....
Programming :: Synchronize 2 Posix Threads ?
Mar 15, 2011I have 2 threads and both of them are deleting memory at the end nedded by both.
My problem is that maybe it can happen that a thread start and finish before the other one starts and so it deletes the memory nedded by the other thread. How can I synchronize them so that this can't happend.
As a design my threads look like this:
Code:
The other thread looks the same, but this isn't unoff to stop thread1 to finish before thread2 starts.
Security :: SetUID: Limit The Use With POSIX Capabilities?
Nov 15, 2010It is known that binaries with the SetUID bit enabled are a threat for the system.I saw on this ArchLinux wiki[URL].tead_Of_Setuida way to limit the use of SetUID bit thanks to POSIX capabilities.It looks very interesting.Does anyone of you used it already?Is it a burden for the system afterwards (like binaries not working, needing to be fixed); or is it seamless
View 3 Replies View RelatedProgramming :: Proper Implementation Of POSIX Threads
Apr 6, 2011I've implemented a program URL... which reads digital IF data from a radio receiver through a named pipe, measures power levels, and sends the result to stdout. The program is interactive; there is a thread that reads from stdin to watch for commands, a thread that constantly either reads data from the named pipe or throws data away, and an array of processing threads. The program uses GTK+extra to plot the signals. The IF data stream bandwidth exists at the limits of today's technology (is very very fast).
Problem Statement:The program works fine with a few bugs. I've learned since I've made it that using global state variables to coordinate threads isn't a good way of doing it. I also only had knowledge of mutexes and polled the state variable instead of using other methods.My reimplementation will use the following:
- One "Stdin Command Monitoring" thread
- One "Get data from named pipe" thread
- One post-processor thread
- N Processing threads
All threads are alive during the life of main()There are N buffers. Data will come in from the named pipe, and the "Get data" thread will write the data to an "available" buffer. When the buffer is full it will be marked as "full". There will be N processing threads, one for each buffer. When a processing threads' buffer is full, it will process the buffer and save the result to a final buffer. At the end of a number of averages, the post-processor thread will perform a final process on the final buffer and send the results to stdout.
Debian :: Permanently Change Locale From POSIX To En_GB?
Apr 3, 2010All my LC environment variables are currently set to POSIX at boot, though I can't find the startup script that does this. I've grepped through /etc/rcS.d and /etc/rc2.d but no luck. In /etc/default/locale, LANG is set to en_GB.UTF-8, which is my preferred locale. But this doesn't stop all the LC's being set to POSIX. Consequently, my dates follow the American convention, which I find hard to read.
I tried resetting with update-locale LC_TIME=en_GB.UTF-8. This changed all the locales to en_GB but only for the session. When I rebooted, everything went back to POSIX. The only change is that en_GB.utf-8 is now in the /etc/default/locale file as the value of LC_TIME as well as LANG.
Programming :: Closing / Unlinking POSIX Message Queues?
Apr 15, 2011I have a pthread waiting forever on a POSIX message queue and then call mq_close and mq_unlink on the POSIX message queue. I've found that the pthread never wakes up from it's call to mq_receive and remains blocked indefinitely. Is there a way to wakeup all pthreads blocked on a POSIX message queue after calling mq_close/mq_unlink? The goal is to include error handling during message queue deletion to avoid leaving any pthreads blocked forever.
View 2 Replies View RelatedServer :: Multiple Users Per Ldsp Posix Group?
Mar 15, 2010I want to add some users to multiple groups. syntax of the file to pass to ldapadd? or would I use lapmodify? Does one add/modify a user record to specify the groups that user is a member of? Or does one add/modify each group record to specify which users are members?
View 1 Replies View RelatedSoftware :: Posix Semaphores Posting For More Than One Thread At A Time?
Apr 12, 2011I would like to know can we post more than one thread at a time.I have code like below
Code:
#include <stdio.h>
#include <unistd.h>
[code]...
Programming :: Find Number Of Child Processes (C / POSIX)?
May 26, 2010I'm in the process of writing a program that is a server- it will accept connections and stuff, and spawn a child process for each. However, i've run into a small problem. I do NOT want to bother with keeping track of the processes unless i need to. So, i set SA_NOCLDWAIT (#ifdef) on a SIG_IGN to the SIGCHLD handler through sigaction interface. The standard says that it the kernel will then keep track of reaping zombie processes for me (a HUGE plus). However, upon receiving a SIGINT signal, i want to stop the server from accepting new connections (done), and then wait for there to be no new connections. I was thinking of just putting a loop like so:
Code:
while((wait(NULL) != (pid_t)-1) && errno != ECHILD);
However, I'm not *sure* that this will work, especially with SIGCHLD still ignored. So how can i tell if there are still child processes? I can't find any call like int getnumchld(pid_t proc); (i wish). Plus it would be inefficient to spin on that function anyway. OTOH, i would rather *NOT* have to do the same thing in a loop with a system("ps |...>file"); read(file); etc. either. Is there a way i can portably implement this feature (I was hoping i could run it on linux and the major BSDs, at least).
TO SUM IT UP:
How can i tell if a process has no child processes if i've SIG_IGN'd SA_NOCLDWAIT'd the SIGCHLD? Is there a _reasonably_ portable way to do so? I *don't* want to manually wait for EVERY process. Maybe only those still active at the time of SIGTERM, but that requires keeping track of the number of connections and whether those have terminated...
EDIT: Does anyone know if the above code *would* work, even with SIGCHLD ignored and the kernel cleaning up zombies *for* me? I checked the manpage and it doesn't say much.
EDIT1: Note that all of the processes are in the same process group and session. SO i can find them through this as well. Perhaps even setting the uid/gid and finding all processes run by that group?
EDIT2: i have an idea if the above isn't feasible. If there is no "elegant" way to do it, i could reduce the complexity by sending a SIGUSR1 to the whole process group. Each process would then set a flag telling it to send a SIGUSR1 in reply and send a SIGUSR2 when it is done executing. Then i could keep a count of signals. Maybe that would be *easier*. Or perhaps a count of all child processes and just a termination signal to decrement the counter.
Programming :: Posix Message Queues - Communicate Between Two Threads?
Jan 3, 2011I want to communicate between two threads, each belonging to a different process. Iam using message queues for this. I use mq_open()call. I created the queues with the same queue name starting with a '/'. But when I open the queue, the queue ID is different in both the process. What should I do so that both the process have the same queue ID?
View 1 Replies View RelatedProgramming :: Related To Pthreads And Timers In POSIX Standard
Feb 17, 2010I have created two threads:
Thread 1 and thread 2
In the main thread, i have put up a timer which generates a signal periodically when it expires, which reults in execution going to signal catcher function.when this function is invoked, under certain condition it goes to thread 1 and under another condition it goes to thread 2. The problem lies here that when it goes to thread2,i have a loop to process but it doesnt come out of the loop and hence from thread2, even though timer has expired.
Programming :: Program Hang Stuck There Signal Handling On POSIX Message Queue UNIX C Pr
Jun 14, 2011In a single main() function,so need signal handling. Use Posix Message Queue IPC mechanism , can ignore the priority and other linked list message,to implement the scenario:
View 1 Replies View RelatedUbuntu :: How To Trace GUI Locking Up
Jan 1, 2010I just did a fresh install of Kubuntu 9.10. The GUI regularly locks up. I can SSH to it from another machine everytime it locks up. Top shows Xorg consuming 99% cpu. I think downgrading the nvidia driver to 173 from 185 helped reduce the lockups. Before they seemed very random and very often. Now it seems to happen when copying a large amount of files over the network but I'm not entirely sure. It ran the electricsheep screensaver all day today with no problems and the RSS euphoria GL screensaver all day yesterday. If I copy 2GB of files from one local directory to another no problem, if I do it through cifs mounted samba shares it will lock up for sure. Small amounts seem ok. Apt-get install has had some lock ups too.
I don't really know how to trace what's going on beyond installing ssh and finding out that it's totally alive inside. I don't know what to look for in log files nor which ones to look at. I didn't recognize anything wrong in Xorg log. In the system log I look for the time gap between when it locked up and I shut down and when I rebooted but I didn't notice anything.
Security :: How To Trace Hacker
Dec 2, 2010I manage a dedicated webserver running OpenSuse 11 which is currently hosting about 30 sites. I have never had any big problems until these last 2-3 months. One site after the other was being hacked and the unwanted visitor installed all kind of php shell scripts followed by torrent servers, ... etc. All hacked sites were sites using Joomla, so what I did was to close down those sites one by one. Well, I guess we all know Joomla is not a great solution if you just install it out of the box like those users were doing.
When trying to trace the intruder only some african junk IPs and IPs from a company selling VPN connections thru paypal show up (yeah great, love those guys ... do they really think that serious VPN users will pay with paypal) I checked all apache and FTP logs (yes, he even managed to get some FTP login) but only those damn 'proxy' IPs come up. The weird thing is that the guy seems to know how the server was 'build' since he manages to copy stuff from one site to the other. That is why I am suspecting someone who worked for a clients company, but I need proof. One way would be to let him hack a site and try to feed him something that would make him traceable, but what?
Security :: Trace Ip In Pidgin?
Jan 20, 2010I am using pidgin for google chat. Is it possible to know the IP of the person i am chatting with?
View 4 Replies View RelatedNetworking :: How To Trace Energy Metric In NS2
Jan 11, 2010How to trace the energy information from the trace file. also how to change the energy drain in faster manner.
View 2 Replies View RelatedSecurity :: How To Find The Trace Of The Attacks
Dec 30, 2008I fear that an attack or an entry in my PC has occured, how to find the trace of the attacks.
View 3 Replies View RelatedServer :: Trace Writes To File?
Feb 14, 2010Does Linux have a way to trace writes to a file?
For each write, I would like to know the time, date, process id, user, file position, byte count, and the data written.
I could use this with a script to replay the writes to a backup of the original file, and reproduce the file contents as they were at a point in time.