Programming :: Showing Process Id But There Is No Such Process?

Nov 9, 2010

I have a shell script to identify whether the process is running or not. If the process is not running, then I execute another script file to run my application. Below is my script and saved this script as monitorprocess.sh

Code:
#!/bin/bash
result=$(ps -ef | grep -v grep | grep "applicationname.sh" | awk '{print $2}')

[code]...

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Programming :: Displaying Process Id In Shell Script But There Is No Such Process?

Nov 9, 2010

I have a shell script to identify whether the process is running or not. If the process is not running, then I execute another script file to run my application. Below is my script and saved this script as monitorprocess.sh Code: #!/bin/bash

result=$(ps -ef | grep -v grep | grep "applicationname.sh" | awk '{print $2}')
echo $result
if [ "$result" == "" ];

[code]...

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Programming :: Difference Between Init.rc Process And Normal Process?

Mar 31, 2011

Is there any difference in cpu usage for process in init.rc(runs automatic when boot is happened) and manually running process. Will these both have same priority by default...?

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Programming ::get The PID Of The Process Giving Kill Signal To A Process?

Nov 26, 2008

I tried googling but didn't get any answer for this.I have a process called "abc" and it is running with PID "123".I have a putty session opened with PID "999".I am giving kill -TERM 123 from putty session.My process "abc" before dying it should catch the PID of the terminal which provided TERM signal to it.Is there any way to find this out

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General :: Killing Parent Process Without Killing Child Process (Linux C Programming)?

Mar 10, 2011

I want to kill parent process after "fork()" method. but if I kill parent process with "exit(0)" method, main() thread is terminated as well so child prosess doesn't work anymore. Is there any way to kill only parent process without affecting to child process?

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

[code]....

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Programming :: Under Which Circumstances A Child Process Creates Another Child Process Using Fork

Dec 7, 2009

Consider the following code:

Code:

int main()
{
int i=0;
pid_t pid;
for(i=0;i<2;i++)

[code]....

I get the following output:

Parent: chid_pid=4356 i=0 parent's pid=4355
This is child 4356 i=0
This is child 4357 i=1

[code]....

I can observe instead of two children(as I expect) processes there are three. This is because child process 4356 creates its own child. Why all the messages of the type "This is child X i=Y" are concentrated one under another? How exactly fork works? Is affected by the fact that I have a dual-core processor?

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Red Hat / Fedora :: Command To Stop That File/process Or Is It Just Kill The Process To Stop The Process?

Nov 11, 2010

I've some file with .sh extensions that runs some softwares.Now,how do I stop running that filesI know we run the command ./start_tomcat.sh to start the apache.Is there any command to stop that file/process or is it just kill the process to stop the process

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General :: Kills A Process Internally Or From Where It Picks File To Continue Its Process?

Jan 8, 2010

one tell me the internal working of kill command. that is how it kills a process internally or from where it picks file to continue its process.

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General :: Elevate The Priority Of A Process Without Process Superuser Rights?

Jan 21, 2011

I have a high priority service that I start with sudo nice -n -10 process. This process does not need superuser rights though, except for the priority elevation. But nice requires superuser privileges to elevate priority.

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General :: How To Identify Raid Degrade Process / How To Rebuilt Process

Jun 12, 2010

send the details raid configuration how to use in linux el5 and how to indentify the raid degrade process and how to rebuilt the process.

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General :: Sending Signal From Child Process To Parent Process?

Sep 8, 2010

Code:

#include <stdio.h>
#include <unistd.h>
#include <signal.h>

[code]....

Description of what the code does or what i intended to do:

1. Created a child process from parent process using 'fork()'

2. Sent a signal 'SIGALRM' from child process to parent process using 'sigqueue' function.

(The Third parameter of 'siqueue' function contains the message (message msg) which the child process wants to send to the parent process.'msg' is a stucture instance containing a) pid of child and b) string) 5. Print the 'msg' sent by child process inside the signal handler function 'sig_action_function' of the parent process I am getting some junk value when this line is executed

Code:

printf("%d
",msg->cpid);

I expected to get the pid of child process, which the child process sent to parent process through the signal.

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General :: Process Scheduler A Part Of Process Queue?

Aug 12, 2010

as we all know Process Scheduler does Process scheduling and its a process as well. I was just wondering that if this happens then the Process "Process Scheduler" should be a part of Process queue as well.

So if there are 5 process are there in Process queue & process scheduler is administrating them then since its also a process, once it puts a process under RUN state it should itself go inside queue because at one instant only one process can get executed on a processor. This is quite confusing for me. Please help me out. I tried to search on this but could not find any relevant topics.

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General :: Find The Parent Process Of A Zombie Process?

May 4, 2010

How do you find the parent process of zombie processes?

When the child process is something where the parent is not entirely obvious...

Is there some way to list processes in tree format or something?

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General :: Process Shows Multiple Process Ids(pids)?

Nov 9, 2010

I have a process running on Linux.When i do ps -eaf | grep <myProcess>, it show muliple entries for <myProcess> with different pids for each entry.Kindly tell me what could be the reason for a process having multiple pids?

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General :: Ran New Process After Sungrid Process Finished?

Mar 23, 2010

I want ro ran new commandy after sungrid finish his task.Exp:qsub -q bla command1; command2 command2 start only when job of command1 finished.

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General :: Save The Process And Log Out Then Log In And Continue The Process?

Nov 16, 2010

I've been running my shellscript for about half an hour now. It's taking longer than I thought to process all the data. I have the process ID of it. Is it possible to save the process and log out then log in and continue the process? I know how to pause a process using kill -pause pID and continue it using kill -cont pID. But that only work if you don't log out after pausing it.

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Ubuntu :: Unable To Boot - Showing Init Rcefault(2111) Main Process Terminated

Feb 13, 2010

Am using ubuntu for a year Now am getting some prob am unable to boot it is showing init rcefault(2111) main process terminated

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Programming :: Unix Programming - Single Process That Does Not Start Up Any Other Threads

Sep 28, 2010

i want a process that can operate as both a TCP echo server and a UDP echo server. The process can provide service to many clients at the same time, but involves a single process that does not start up any other threads.

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Red Hat :: Yum Update Process Stops After Showing Line "Downloading Packages"?

Apr 6, 2010

Version: #1 SMP Tue Aug 18 15:51:54 EDT 2009Release: 2.6.18-164.el5While running "yum update"After Transaction summary shows download size. I answer the question:"Is this ok [y/N]: y" and process freezes on next line?I have tried yum clean all and retried same result? I have allowed it to continue for several , many, minutes but must CTRL Z to stop process then kill remaining yum processes.I have also deleted and rebuilt the rpm database

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Fedora :: Kde Programs Showing "The Process For The File Protocol Died Unexpectedly."?

Sep 4, 2009

i'm still relatively new in using linux and is quite enjoying using fedora, however, upon restarting my computer I get this message on almost anything related to browsing my files..."The process for the file protocol died unexpectedly."the programs i'm talking about include dolphin, amarok, ktorrent and ksnapshot (well those are the ones i've checked, i thing there are more apps having this problem...)sample screenshot: the weird thing is, when i do "kdesu dolphin" for example, the problem doesn't occur.sample screenshot:My desktop folder is also experiencing the same problem.

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Programming :: How To Get Process ID Using Pidof

Jan 31, 2011

I tried to get process ID using pidof. It didn't give any error but a blank output at console Code: $ pidof -s instance1

$
But when I use ps -ef, I get the process ID Code: $ ps -ef | grep instance1
root 4174 21661 0 06:52 pts/1 00:00:00 grep instance1
provgw 30220 30219 28 06:46 pts/1 00:01:44 /usr/java/jdk1.6.0_18/bin/java -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager

[Code].....

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Programming :: Force Two Process To Run On The Same CPU?

Jan 11, 2011

I'm programming a software system that consists of multiple processes. It is programmed in C++ under Linux. and they communicate among them using Linux shared memory.

Usually, in software development, is in the final stage when the performance optimization is made. Here I came to a big problem. The software has high performance requirements, but in machines with 4 or 8 CPU cores (usually with more than one CPU), it was only able to use 3 cores, thus wasting 25% of the CPU power in the first ones, and more than 60% in the second ones. After many, many research, and having discarded mutex and lock contention, I found out that the time was being wasted on shmdt/shmat calls (detach and attach to shared memory segments). After some more research, I found out that these CPUs, which usually are AMD Opteron and Intel Xeon, use a memory system called NUMA, which basically means that each processor has its fast, "local memory", and accessing memory from other CPUs is expensive.

After doing some tests, the problem seems to be that the software is designed so that, basically, any process can pass shared memory segments to any other process, and to any thread in them. This seems to kill performance, as process are constantly accessing memory from other processes.

Now, the question is, is there any way to force groups of process to execute in the same CPU?. I don't mean to force them to execute always in the same processor, as I don't care in which one they are executed, but that would do the job. Ideally, there would be a way to tell the kernel: If you schedule this process in one processor, you must also schedule this "brother" process (which is the process with which it communicates through shared memory) in that same processor, so that performance is not penalized.

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Programming :: Know Status Of Process With PID?

May 25, 2010

How can I programatically know the status of a process if its PID is known?

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Programming :: Using Copy_from_user With 2 Process?

Oct 20, 2010

Is there a way to send/receive messages between 2 process using copy_from_user and copy_to_user ? I'm looking for some article, but did not found anything.

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Programming :: Batch Process Files In VI?

May 29, 2010

I'm completely new to scripting and I'm trying to figure out how to write a script that will get a list of all the files in a directorywn through any subdirectories.When I have the list I want to o each file in VI and change the fileformat. So far all I have been able to figure out is that VI can do the batch processing and that "ls -R" gets me the recursive file list. I'm still pretty clueless on how to do the batch process with the VI editor. I think I'm supposed to use the Ex mode but I don't know how to get the list of arguments from the filelist into the editor so they can be processed. If it matters the files were all written in a Windows editor and have gotten the MS carriage returns so I want to do a :set ff=unix command on all the files without having to go into each file manually, there are over 300 files that need updated.

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Programming :: Getting The CPU & (Virtual) Memory Of A Process?

Aug 23, 2010

Is there any program which gets the CPU and memory of a process ?

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Programming :: Maximum Ports Per Process?

Dec 8, 2010

I'm trying to build a multi-threaded server "C" program connecting to multiple clients. For various design reasons, I thought of having one port number per client. What is the maximum number of ports my process can handle

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Programming :: Listing All Threads In A Process?

Dec 29, 2010

How to list all the threads spawned by a process?

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Programming :: Process Memory Allocation

Apr 30, 2011

I have been assigned a school project on detecting memory leaks in linux processes. I am reading.. but have found it hard and inefficient to go through the very vast documentation not knowing what to really look for. Could you please give me some guidelines on this subject?

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Programming :: Set Supplementary Groups Of Process?

Mar 20, 2010

Unfortunately the setuid() function from unistd.h does not effect the supplementary group ids of the process. Is there a way to set them directly? Even better, is there a setuid() equivalent which also sets the process's supplementary gid's to match the user's?

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