An issue with trying to find out if a file is being used by another process is the possibility of a race condition. You could check a file, decide that it is not in use, then just before you open it another process (or thread) leaps in and grabs it (or even deletes it).
You can run from Java program the lsof Unix utility that tells you which process is using a file, then analyse its output. To run a program from Java code, use, for example, Runtime, Process, ProcessBuilder classes.
Be aware that this command will take a second since there are, normally, a lot of files open at any time. You can also use lsof -c gedit, for example, to see which file gedit has opened. Restricting the output to one process will reduce execution time to practically nought. Here's a script to wait: #!/bin/bash while : do if !
Some file formats (such as PDFs) have data in them that allow you to determine if the file is complete. But you have to open and read pretty much the entire file to find out. lsof will just tell you the file is no longer open - it won't tell you why it's no longer open. Nor will it tell you how big the file is supposed to be.
29.03.2019 · In this article, we will explain how to find out who is using a particular file in Linux. This will help you know the system user or process that is using an open file. We can use the lsof command to know if someone is using a file, and if they are, who. It reads kernel memory in its search for open files and helps you list all open files.
24.03.2018 · You may not know whether the file is being written. However, you may use lsof to check whether the file is opened by any other processes. Programs like cp will close the file after the work is done. So you may bet on it for most situations. For a …
05.01.2020 · The lsof (“list open files”) command can be used to list files that are opened by a specified Linux process. Just use it with the -p option and a process id (PID) to get the listing: lsof -p [pid] Note that there may be some behavioral differences here depending on whether you are logged in as root or as another user.
Having a file open is not a lock because, if each process has to check whether the file is open first and not proceed if it is or create/open it if it isn't, then two processes could quite well check simultaneously, both find that it isn't open, then both create or open it. To use a file as a lock, the check-and-lock operation has to be a ...
05.03.2008 · head – Display top 10 process along with open files count; Conclusion. Now you know how to find open files per process on Linux, FreeBSD, and Unix-like systems using various command-line options. See how to increase the system-wide/user-wide number of available (open) file handles on Linux for more information.
This is the next thing I will try to do. lsof seems to exist on quite numerous linux distributions. Opening a new process with lsof and reading out the standard ... it does not work on ubuntu/linux. the filesystem let me acquire the lock even if the file is already open in another process. but it works for windows. anybody any idea how to ...
It did not show any open process to me. Yesterday when I tried the same thing, it once showed up i.e. I could see the output of lsof command but then again it ...
Jan 05, 2020 · The lsof (“list open files”) command can be used to list files that are opened by a specified Linux process. Just use it with the -p option and a process id (PID) to get the listing: lsof -p [pid] Note that there may be some behavioral differences here depending on whether you are logged in as root or as another user.
You are on the right track, renaming the file is an atomic operation, so performing the rename after upload is simple, elegant and not error prone. Another ...
Also, different OSes might behave differently - some OSes might support things like filesystem-level or block-level snapshots or shadow copies, which might allow you to get exclusive lock on a file, even if some other process has the file open for reading. One person in the other questions said you can test all the open file handles in the system.
07.09.2021 · Here is how you can get rid of the temporary files from your computer storage. 1. Press Win + R. 2. Type %temp% into the input bar and press Enter. 3. In the new folder that opens containing all the temporary files stored in your File Explorer, press Ctrl + A to select all the files and delete them together. 4.
The fstat utility identifies open files. A file is considered open by a process if it was explicitly opened, is the working directory, root directory, jail root directory, active executable text, or kernel trace file for that process. If no options are specified, fstat reports on all open files in the system.
Mar 24, 2018 · However, you may use lsof to check whether the file is opened by any other processes. Programs like cp will close the file after the work is done. So you may bet on it for most situations. For a file without any other process opening it: $ lsof -f -- ~/.bashrc. With one process openning for reading: