Programming :: File Access Alert \ Only Gives The Processes Accessing The File At That Particular Moment?
Jul 11, 2011
I am trying to check what all processes are accessing a particular file (a UDP socket in my case) on a filesystem.I am using 'fuser' for that.But, it seems, it only gives the processes accessing the file at that particular moment.Is there any way to continuously run 'fuser' (or some other command) which will give all processes accessing the file during its run?OR is it possible to generate a filesystem alert when a particular process accesses the file?
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Sep 29, 2009
I have 2 completely different processes A and B (they do not have any relationship) suppose A opens a file with file descriptor 4 and B opens another file with file descriptor 5
Can process A use the fd 5 (i.e using the file object of processs B) by any means..if suppose i let the fd 4 of process A to point to the file object of process B(fd 5) will it work? is it safe?
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Mar 12, 2010
I have a .csv file with a list of Drugs Name that i need to remove from the folder. The folder consist of files that stored as drugname.mol format.
What i need to do is to sieve out those mol files from the folder?
How do i
(1) access the drugs names from the .csv file line by line (variable x)
(2) how do i access the files in the folder one by one (variable y)
(3) how can i do a comparison whether $x.mol == $y
(4) and shift them to another folder if $x.mol == $y
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Mar 9, 2011
I've just recently started learning shell scripting and I've been working on a basic csh script, but I've been having a few problems. Here's the script
Code:
#!/bin/csh
echo Enter a file name
$< = FILE ##Name of file
echo enter a size (in kilobytes) to monitor
SIZETOMON = $< ##Size value that's input by user
du -k $FILE = $SIZE ##Size of the file that the user wishes to monitor
while (1)
if $SIZE > $SIZETOMON then
echo ALERT: File size is greater than $SIZETOMON
end
And here's the output
Code:
/home/lucer/foo.txt: Permission denied.
Badly placed ()'s.
I'm not really sure what the issue is with the "badly placed ()'s" or why it won't let me access files that I can access with the same shell when it's not in a script.
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Nov 28, 2010
On linux, is there a way to count the number of file descriptors open to a some file?
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Mar 2, 2011
My requirement is that I wanted a shell script which should read the alert.log(oracle) and should send the alert to my email if any error encountered on daily basis. I have a script which does the same job but at the same time it creates a new alert.log whenever any error occur. But I don't want the new alert log I wanted to read the same alert log daily and if any new error come should alert as email.
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Nov 11, 2010
i want to make a program to write the result of access to a file ,i mean for example a user wants to (open,delete,edit)a file but if he has no access to this file ,something write to a log file.so after that i can check which user got access denied by accessing to which file.or if any tools available that can do this?or if there is any built in log access file that record the permission denied to files?
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Feb 10, 2010
I recently decided to try installing Command & Conquer Red Alert 2 Yuri's Revenge from an old iso file I had floating around my hard drive. I first mounted the iso and copied the files from it into a folder. I then used Wine to install. Everything went according to plan until I went to run the game. When I tried running Red Alert 2 (original) an error message popped up: Error - Unable to set the video mode. When I tried running Yuri's Revenge the same thing happened with one small exception, the first couple of times I tried the Yuri's Revenge splash screen popped up before showing the error message. However the splash screen no longer pops up.
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Mar 8, 2011
I need to disable file access (fopen, freopen, open etc) for application which is running under chroot jail and with restrictions (rlimit) via execv. Before that I redirected stdin/out to files within jail. I tried this:
Code:
// Redirect stdin/stdout to files
int fd = open (file_input, O_RDONLY);
if (fd < 0)
fatal_error ("input open failed!");
[Code].....
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Aug 1, 2011
ccess to an iso file in chroot environment from my usual root (/) env..
Within the chroot environment I have an iso file placed... In my program I need to access this iso file and perform mount and other operations.. But I cant do this in the chroot environment as I have only basic commands here (ls,cp etc.. and no mount)
So how can I access this iso file from my program ? Is there something like a file-descriptor which I can associate with the file exit from the chroot env and access the file via this fd ?
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Oct 23, 2010
I am running shell command through C program using system() routine.
I am executing "opcontrol --status" an executable using the this routine and I get the following error. access: unix error (2) No such file or directory
But when I give the complete path to the executable it runs perfectly.
The executable is installed in "/usr/local/bin/" And the path variable has this path.
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Apr 21, 2011
Can't log into my XFCE desktop like I normaly do. all the sudden I get notified that my xsession lasted less then 10 secondsLooking at the error I can see this:
Unable to access file /home/username/.iceauthority: No such file or directory
Using failsafe I can start a terminal. From terminal I tried to start X
Code: sudo startx Result: Running on desplay:0
So I tried to run this;
Code: sudo startxfce4 And I get up a graphical desktop.
So this is not a critical situation as I easily can use this method to log on, but as there has been something causing this I would like to be able to resolve this nonetheless. Btw it is not the old chmod trick in play here, cause my .iceauthority file is gone alltogheter.
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Jun 22, 2011
After an update recently I noticed that my process count jumped up quite a bit. Somehow it doesn't seem related (it was an apt update I believe), but I'll just throw it out there. All of the extra processes seem to be related to XFS and JFS file system kernel processes, but none of my file systems use XFS nor JFS, just EXT3 & EXT4. Is there any safe/easy way to kill off these processes and prevent them from re-spawning? I don't find having irrelevant idle processes to be beneficial nor efficient. It's using Ubuntu 10.04 64-bit. Only active file systems are EXT4 and EXT3.
[Code]...
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Mar 20, 2011
I am in need of a way to distiguish what processes are opening a particular file.
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Jul 28, 2011
How to kill the processes accessing Internet in background using terminal commands.Command to stop (disconnect) the processes accessing Internet.Command to kill the process accessing Internet.
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Dec 16, 2009
I thought 'killall' would work, but I need to provide the "command" to kill. I'm really looking for a command that will kill all processes that have a particular file/directory open. Currently, my script fails on an 'umount' because there are several processes that have this filesystem open. The command 'lsof' is a good tool to determine which processes have a filesystem open, but I don't really want to write a script that parses through the 'lsof' output to capture PSIDs. Is there a linux command that can kill all processes that may have a particular filesystem open?
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Mar 2, 2010
I am trying to access a .dd file extension. Do I have to mount it?
VMware-VMvisor-big-3.5.0_Update_2-110271.i386.dd
# fdisk -ul VMware-VMvisor-big-3.5.0_Update_2-110271.i386.dd
Blocks Id System
VMware-VMvisor-big-3.5.0_Update_2-110271.i386.dd1 8192 1535999 763904 5 Extended
VMware-VMvisor-big-3.5.0_Update_2-110271.i386.dd4 * 32 8191 4080 4 FAT16 <32M
VMware-VMvisor-big-3.5.0_Update_2-110271.i386.dd5 8224 106495 49136 6 FAT16
[Code].....
I am trying to grab some files off this file to create a PXE vmware boot.
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Jan 21, 2010
I made a script for batch processing brain scans (with FreeSurfer). I have a batch file stored on an NFS server that looks something like this:
Code:
subject1
subject2
subject3
subject4
now my script is performed on several computers at a time, first it marks an item to be in use (with sed -i 's/.../...'), then processes it (it gets the actual subject files from elsewhere on the server, then puts them back), then marks it to be finished in the list. so during action the batch file should look something like this:
Code:
subject1 finished
subject2 inprogress on host1
subject3 inprogress on host2
subject4
so i tried a run and watched the batch file, now i observed something like this:
Code:
subject1 finished
subject2 inprogress on host1
subject3 inprogress on host2
[code]....
there was only one script running on host1. the subjects never got marked as finished, although i know for a fact that they were finished. also, the script sometimes seemed to hang for moments.
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Nov 7, 2010
i just installed ubuntu on my old dell inspiron 4000 laptop. I have a problem with my screen though thats making ubuntu split in half makign it nearly impossible to use.. i found the possible solution at [URL] but im havin g trouble accessing File System where the document i need is located The solution states to open etc/X11 then to do some other line and change something in a text but i have no idea how to access File System using terminal?
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Jun 19, 2010
I have 3 linux systems configured for running applications in each, named system1, system2 and system3. I have around 100 GB of space in system3 under /usr but not much being used. In System1 very less space is there but mostly hits coming here and need to have proper backup, as the system1 is quite old and not planned partitons properly. So I want to use a disk having more space for backup requirements.
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Feb 19, 2011
We purchased a new database system at work last October, ditching the old system because of a lack of support from the vendor. This is a retail Point of Sale and Backoffice database system. I am not sure what system the new one runs on, but the system we replaced was a Firebird data base. The reason I am posting is because we are now in need of the information contained in the old database which was not completely imported into the new system. Unfortunately, we parted company with the old vendor under extremely hostile conditions, and they are not a source of help for this problem, nor are the new vendors.
Basically the problem is this: The database in on a Windows XP system and I found a copy of SQL Manager Lite 2008 on the system, which after quite a bit of studying, I figured out how to extract the database into a removable file. I have this file (178MB) on a USB stick in a file called Backoffice.fbd. I can get into this database with MySQL. All I want to be able to do get into the database and create tab deliminated spreadsheet files for each of the database sections (Customers, Repairs, Sales History, stock files, etc.) Is it possible to do this with Ubuntu and MySQL and if so, can an expert suggest one or two things to get me started.
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Jun 9, 2009
I have been messing with diff and grep for 2 days now without result
I am trying to match a file consisting of words to many separate other wordfiles in a specific directory. one by one.
What i want the script to do is to report how many matching words my main file has with every file in the directory, each in turn
setup:
Each of em are plain text files with 1 word per line
Output should be something like:
SCRIPT REPORT:
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Apr 19, 2011
I have a .txt-file with ~50.000 lines of numbers, generated by a mathematics program. From this file, I need line ~ 1.100 to line ~16.000 (these lines are always the same btw, this may make the solution easier, dunno) to be copy/pasted to another file, where the lines ~500 to ~15.000 (also, every time the same) should be overwritten by the aforementioned lines...I haven't found or come up with anything that works yet, mostly I find solutions to copy everything from one file to another but I can't find something to specifically overwrite a part of a file with part of another.
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Jul 27, 2010
I am splitting a file based on the values read from an input file. The below one is the script.
1)How do I add the header which is present in the original file to the new split files created?(For eg. pharmacyf conatins header as table column names. The new files created (ODS.POS.$pharmacyid.$tablename.$CURRENT_DATE.dat) are without the header).
2) Also the script is creating 0 byte files for the pharmacyids which are not available in the intial file? Can this be avoided?
for pharmacyf in *
do
tablename=`echo $pharmacyf |cut -f4 -d'.' `
while read pharmacyid
do
grep -w $pharmacyid $pharmacyf >> $OUT/ODS.POS.$pharmacyid.$tablename.$CURRENT_DATE.dat
done< inputfile
done
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Aug 6, 2010
I am running after compiling a program and I find that I get the following. How best can I avoid this as i cannot run the program. I have tried removing the offending package, although I cannot find it. I have also tried re-installing. I have also tried changing FC and F90 flags to avoid the MPI version.
error while loading shared libraries: libmpi_f90.so.0: cannot open shared object file: No such file or directory
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Jul 9, 2009
parsing xml file using shell script and generate report in a PDF file
Xml file input:
<report>
<student name="x" father name="x1" class="first" Address="xyz">
<property name="sports" value="yes"/>
<property name="drawing" value="no"/>
[code]....
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Mar 12, 2010
in case you have been wondering how some websites hide the exact location of a file on their filesystem, just thought i'd share it with the commnity at large in case someone else is looking for something like this.i take no responsibility for how it is used.
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May 1, 2011
My script.
This is may script:
Code:
Problem: Output file doest not exclude the values in grep -av
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Apr 20, 2010
I have a script where I want to redirect stdout to the terminal and also to a log file aswell as redirecting stderr to the same log file but not the terminal.I have the following code which I found on the net which redirects both stderr and stdout to a file and the logfile,
Code: if [ -p $PIPE1 ]
then
rm $PIPE1
[code]...
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Jul 26, 2010
It's kind of pointless imo for the types of errors that Exiv2 reports on to be written to a text file without some reference to the name of the file that prompted the error message in the first place. Is there a way to have bash identify the file that prompts the error and writes its name to the same file as the error (in my case, frencherrors.TX)?I've tried a painfully simple syntax that does something identical to a 2>&1 'suffix", namely frenchgentsfinder.sh 2 $file>>frencherrors.TX. It makes sense to me as written, but I'd like to know why I'm getting nothing on screen and everything directed to the file when what I want to see in the latter are the filenames causing the errors along with the text of the errors.
Is there another level one has to bore down into before they can garner this kind of output? If so, what is it and how does one invoke it in bash?
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