[JENKINS-52750] dir step creates a <dirname>@tmp directory at <dirname> level.

In order to install some internal tools within /opt/tools through a Jenkins job, I have created a /opt/tools directory belonging to jenkins:jenkins and where user jenkins only (the user running the slave) has rwx rights.

Trying something like :

stages {

  steps('xyz') {

    dir('/opt/tools') {

       sh "pwd"

    }

  }

}

Fails with an exception ending with :

java.nio.file.AccessDeniedException: /opt/tools@​tmp

	at sun.nio.fs.UnixException.translateToIOException(UnixException.java:84)

	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)

	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)

	at sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:384)

	at java.nio.file.Files.createDirectory(Files.java:674)

	at java.nio.file.Files.createAndCheckIsDirectory(Files.java:781)

	at java.nio.file.Files.createDirectories(Files.java:767)

	at hudson.FilePath.mkdirs(FilePath.java:3098)

	at hudson.FilePath.access$900(FilePath.java:209)

	at hudson.FilePath$Mkdirs.invoke(FilePath.java:1216)

	at hudson.FilePath$Mkdirs.invoke(FilePath.java:1212)

	at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2913)

	at hudson.remoting.UserRequest.perform(UserRequest.java:212)

	at hudson.remoting.UserRequest.perform(UserRequest.java:54)

	at hudson.remoting.Request$2.run(Request.java:369)

	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)

	at java.util.concurrent.FutureTask.run(FutureTask.java:266)

	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

	at java.lang.Thread.run(Thread.java:748)

It appears that Jenkins tries to create a tools@​tmp directory at the same level as tools. Yet, there is absolutely no reason for the tools root directory to be writable for any user.

And as far as /opt is concerned here, for sure it must not be writable for anybody else than root.

Additionnally, such @​tmp directory is not removed once the build is achieved. Even though it seems that the directory is empty, I think that Jenkins should remove it to give back a clean environment.

---
Originally reported by jlpinardon, imported from: dir step creates a @tmp directory at level.

• status: Open
  
• priority: Major
  
• component(s): workflow-basic-steps-plugin
  
• label(s): pipeline, pipeline-triaged
  
• resolution: Unresolved
  
• votes: 16
  
• watchers: 22
  
• imported: 20251215-220547
  

In order to install some internal tools within /opt/tools through a Jenkins job, I have created a /opt/tools directory belonging to jenkins:jenkins and where user jenkins only (the user running the slave) has rwx rights.

 Trying something like :



stages {

  steps('xyz') {

    dir('/opt/tools') {

       sh "pwd"

    }

  }

}





Fails with an exception ending with :



java.nio.file.AccessDeniedException: /opt/tools@tmp

	at sun.nio.fs.UnixException.translateToIOException(UnixException.java:84)

	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)

	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)

	at sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:384)

	at java.nio.file.Files.createDirectory(Files.java:674)

	at java.nio.file.Files.createAndCheckIsDirectory(Files.java:781)

	at java.nio.file.Files.createDirectories(Files.java:767)

	at hudson.FilePath.mkdirs(FilePath.java:3098)

	at hudson.FilePath.access$900(FilePath.java:209)

	at hudson.FilePath$Mkdirs.invoke(FilePath.java:1216)

	at hudson.FilePath$Mkdirs.invoke(FilePath.java:1212)

	at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2913)

	at hudson.remoting.UserRequest.perform(UserRequest.java:212)

	at hudson.remoting.UserRequest.perform(UserRequest.java:54)

	at hudson.remoting.Request$2.run(Request.java:369)

	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)

	at java.util.concurrent.FutureTask.run(FutureTask.java:266)

	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

	at java.lang.Thread.run(Thread.java:748)





It appears that Jenkins tries to create a tools@tmp directory at the same level as tools. Yet, there is absolutely no reason for the tools root directory to be writable for any user.

 And as far as /opt is concerned here, for sure it must not be writable for anybody else than root.


Additionnally, such @tmp directory is not removed once the build is achieved. Even though it seems that the directory is empty, I think that Jenkins should remove it to give back a clean environment.


 

• environment: Jenkins 2.121.2 on a CentOS 7