how can I store the output of (ty to colucix for this line)
Code:
xprop -id $(xprop -root | awk '/_NET_ACTIVE_WINDOW(WINDOW)/{print $NF}') | awk '/_NET_WM_PID(CARDINAL)/{print $NF}'
in a variable and then pass the value of that variable to the kill command as the PID to kill?
I am programming on Linux middleware so I need to get a list of all active TCP connections. Is there any API to get such information? I know I can find the connections in /proc/net/tcp, but how to find the PIDs? Apparently ps or netstat command is not an option since it is a middleware.
View 6 Replies View Relatedi need C code to get child pids from its parent pid in linux and in kernel mode, is there anything like getpid() or getppid() which works in kernel mode?
View 2 Replies View RelatedI have several users on handhelds and they like to let their sessions time out. Their zombie processes then cause record locks.I've come up with calls for killing the pids for any prior sessions started by a given user. This procedure would be executed in the .bash_profile.
View 3 Replies View RelatedI have all of the code written for a text based game but how big of a leap is it from text to graphics? lets just say a 2d engine. Is this a fairly easy task or would it be a bit of effort? I've never done anything with graphics before and would just like a quick idea of how much of a project is graphics vs functionality.
View 5 Replies View RelatedI am wondering if pthread could make that a single thread keeps the "mutex" all the time if the time it remains unlocked is very small.
thread1
{
while (1)
{
lock; do_task(); unlock();
[code]...
I experiment the thread2 never getting access to the mutex and never printing the nice message. I would expect that once thread2 calls "lock", it would get the mutex as soon as thread1 calls unlock() but it does not seem to be the case. If I add a sleep of some microseconds (100) in thread1 after unlocking the mutex, it solves the problem.
Does anyone know if this behaviour is normal? Is there a way to configure my mutex so that thread2 receives it when unlocked?I use
pthread_mutexattr_settype(&att, PTHREAD_MUTEX_RECURSIVE_NP);
pthread_mutex_init(&handle, &att);
to create my mutex. I am running ubuntu 9.04
I want to capture short randomly occurring events such as Sudden Interstellar Disturbances, Lightning, ion counting, etc. To do this I wish to use the LINE-IN port. My sensor would feed a signal of less that 2 volts but could be submitted via a voltage divider. Since the sound card captures 44100 events per second this should capture events I am looking at, I think, but maybe not. I would capture the sound buffer to a string or memory buffer every second (and half second so I can prevent overwriting of its buffer, then merge the two).
Every 60 seconds (for validation) I would run "time" and count full buffer transfers in between to time events. By effectively counting characters from the beginning of the processing buffer to the beginning of the event I could further refine the "time to event". I think I could then save a decent number of values or until no data received from the processing buffer to preserve the event. This I would output with event time (to within 1/44100 sec) along with the data points captured to a file.
Except for the outputting of info to a file I think I can scan a buffer for events within a second (while LINE-IN continues capturing data on that port). I believe I have a way to handle the outputting. I am asking if any of the processing of the previous buffer would interfere with the sound cards data capture on LINE-IN? There would be no disabling of interrupts. I am presuming that system interrupts would not effect the LINE-IN data capture. Is this true?
I 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.
I'm very excited to post a question, since I always do everything by myself. I'm reading several lines from a text file using istream::getline(char *, streamsize n). I get the file name from the command line. Here is the code:
Code:
#include <iostream>
#include <fstream>
using namespace std;
int main ( int argc, char *argv[])
[Code]...
Using GCC 4.4.5 on Ubuntu 32bit Btw: I know assembly language and know what a segmentation fault is
I've a question regarding two camera images. Suppose I've detected 2d window coordinate of 8 markers of an object in a scene in one camera and detected window coordinates of 10 markers of the same object on another camera.
I've detected the marker. It was easy. Now how do i know which window coordinates on two cameras are the coordinates of same marker? I mean there are markers captured on both cameras and some of them are representing the same marker in both cameras. I just like to know which ones are same on both cameras. Is it possible to find that out using opencv?
I am trying to create a shell script similar to ls, but which only lists directories. I have the first half working (no argument version), but trying to make it accept an argument, I am failing. My logic is sound I think, but I'm missing something on the syntax.
Code:
if [ $# -eq 0 ] ; then
d=`pwd`
for i in * ; do
if test -d $d/$i ; then
echo "$i:"
code....
Is there some type of functional way to read things in the Python shell interpreter similar to less or more in the bash (and other) command line shells?
Example:
Code:
>>> import subprocess
>>> help(subprocess)
...
[pages of stuff to read]
...
I'm hoping so as I hate scrolling and love how less works with simple keystrokes for page-up/page-down/searching etc.
Is there a linux command (or command combination or utility) that can identify all processes (PIDs) that are sharing a TCP/IP stack ?
View 4 Replies View RelatedCommand top displays the pids (tasks) by order of CPU usage. Could I make it order them by memory usage?
View 3 Replies View RelatedIs it possible to list all jobs and their pids from a certain time frame? For instance if I needed to see all completed jobs from yesterday how would I do this? I've tried jobs -n but that was messed up because I had typed jobs right before that.
View 1 Replies View Relatedi'm trying to write a bash script to upload an image to [URL], but i can't get i working properly. Everytime i try, the html returns me a error saying "Upload is disabled during short maintenance work (ETA 10 minutes). Brb!", while from the browser everything works fine. This is my current command line:
Code: curl -L -b cookie-pix.txt -c newcookie.txt www.pixhost.org/cover-upload -A "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)" -F 0=@/home/admin/Desktop/karm.jpg -F content_type=0 -F press=Upload And this is the html of the form:
[Code]....
I've created a simple script based menu. This menu will be accessed by only a certain users via ssh.When user logs in, the menu will automatically run. (configured at user's .bash_profile).How do I force the session to close when user hits Ctrl-C or Ctrl-Break ?In a nutshell, I don't want user to have access to shell.
View 11 Replies View RelatedI have trouble converting a short array to a char array
Code:
short pShort[4] = { 0x41, 0x42, 0x43, 0x44 };
How to convert this to a char array?
I recently started shell programming and my task now is to do a menu display.Currently i am stuck whereby user will input both title and author and it will delete it.
Do i have to use sed command?
Is it possible to assist in the programming Shell Scripts
Job:
To send a message to the email,All orders written in Terminal or ssh
example : ls , pwd , cat , and other
I have a situation where I am in a non-interactive shell. I have tried from within my non-interative shell to spawn an interactive shell but my output still does not goto me. Isn't there a way I can somehow go into /proc or somwhere and make the output my /dev/tty1? Or some way else to remedy this?The situation arises because I drop from my restricted shell environment (a sort of CLI interface), into the actual Linux shell. I cannot change the code of the CLI environment I am just faced with being in the linux shell environment and its non-interactive. Its very annoying to have to put > /dev/tty1 after every command I type.
Not to mention it seems damn near impossible to get pagers like more and less to work properly when your in a non-interactive shell.
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?
View 1 Replies View RelatedI have a shell script that I would like to log to stdout and also to a file.....much like using tee. I would like to, instead of calling the script and piping to tee...i would like for the script to tee itself.
View 4 Replies View Relatedi got to build my own linux shell for my project
View 5 Replies View RelatedI have been searching most of today and am stuck on getting a variable into an awk portion of my bash script. I have this working:
Code:
#!/bin/sh
SRC=/var/log/mail.log
DEST=/var/www/output/myFile.txt
VAR=userName@myDomain.tld
[code]....
Can awk take a shell variable? Or do I have to do something completely different?
I need to push out a file to a bunch of linux and solaris boxes so I was hoping to use a script to automate the process with scp (or something else / better) - how can I batchmode scp so that it will do this? I should mention the servers do have keys set up so I do not have to authenticate manually or through something like an expect script...
View 4 Replies View RelatedI am having a shell script with following lines
ORIG_LOG_ARCHIVE_FORMAT=`grep log_archive_format $LOG_DIR/init$CLONE_DB.ora | cut -d"=" -f2`
SRC_LOG_ARCHIVE_FORMAT=`sqlplus -s "/ as sysdba" @$SCRIPTS_DIR/log_archive_format.sql`
echo $ORIG_LOG_ARCHIVE_FORMAT
[code]...
When I execute this script I am getting below output
'enin16_%t_%s_%r.arc'
enip131_%t_%s_%r.arc
sed: command garbled: s/'enin16_%t_%s_%r.arc'/
However when I do the exact above command on unix prompt (refer below) after setting values for all variables, it is not giving sed garbled error message. May I know what should I do to make it work inside the script as well?
$ cat init_refresh$CLONE_DB.ora | sed "s/$ORIG_LOG_ARCHIVE_FORMAT/$SRC_LOG_ARCHIVE_FORMAT/g" > $LOG_DIR/init_refresh1$CLONE_DB.ora
$
I'm trying to write a toy linux shell. For starters this is what I'm trying to do:
1. Start a new process with fork.
2. Execute a program in the new process with execl().
3. Redirect the output from the new process from STDOUT to another file descriptor, using dup2(2).
4. In the parent process, read the output from the child process and write it to the screen.
Creating a new process and executing a program in it is no problems, the problem is that I can't seem to capture the output from it in the parent process.
Code:
//digenv
//C++arl 2011-03-24
#include <stdio.h>
#include <sys/types.h>
[code]...
How to use shell command?
installs.sh:
Code: Select allapt-get install icedove-l10n-hu
apt-get install rar
apt-get install ...
...
y press key or other language is other key. hungarian key is: i
english after apt-get install in gnome-terminal: (y)es or (n)o
hungarian after apt-get install in gnome-terminal: (i)gen or (n)em
How to yes or no automatically in all languages? Not manual, not 'Y'/'I' or 'N'/'N' keydown.
I would like use this script my fresh installed Debian 7.1. I would like run this install.sh when Debian is installed for my all softwares when i would like use.
10 PC installing easy and faster my script.
If no script is slowly install for my 10 PC.
I would like to know if there is any way to detect a command if it going to be executed in the shell?
Eg:
Cmd: sudo apt-get clean I want a C program to be called before this cmd is executed.