[Bug 2130465] Re: cp commands fails when process is in deleted directory

[Gordon Lack]

The Rust version runs a series of statx() calls (3 in succession for *each* entry) then calls getcwd() and fails.
It has no reason to be calling getcwd().

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https://bugs.launchpad.net/bugs/2130465

Title:
  cp commands fails when process is in deleted directory

Status in rust-coreutils package in Ubuntu:
  New

Bug description:
  If the current directory of a process is deleted and the process runs
  the Rust cp command it will faile with:

  /usr/lib/cargo/bin/coreutils/cp: failed to get current directory No
  such file or directory (os error 2)

  The GNU version of cp does not have this issue.

  As a result, some automated build processes (which arrive at this
  situation) now fail to run.

  You can see the error by using this simple shell script:

  ====================
  #!/bin/sh
  #

  echo Rust core-utils

  cd $HOME
  mkdir -p cu-test-base
  touch cu-test-base/file1 cu-test-base/file2
  mkdir -p cu-test
  cd cu-test
  rm -rf $HOME/cu-test
  /usr/lib/cargo/bin/coreutils/cp  -r $HOME/cu-test-base  $HOME/cu-test
  ls $HOME/cu-test

  #####################

  echo GNU core-utils

  cd $HOME
  mkdir -p cu-test-base
  touch cu-test-base/file1 cu-test-base/file2
  mkdir -p cu-test
  cd cu-test
  rm -rf $HOME/cu-test
  /usr/bin/gnucp  -r $HOME/cu-test-base  $HOME/cu-test
  ls $HOME/cu-test
  ====================

  ProblemType: Bug
  DistroRelease: Ubuntu 25.10
  Package: rust-coreutils 0.2.2-0ubuntu2.1
  ProcVersionSignature: Ubuntu 6.17.0-6.6-generic 6.17.1
  Uname: Linux 6.17.0-6-generic x86_64
  ApportVersion: 2.33.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: KDE
  Date: Fri Oct 31 21:48:09 2025
  InstallationDate: Installed on 2024-10-12 (384 days ago)
  InstallationMedia: Kubuntu 24.10 "Oracular Oriole" - Release amd64 (20241007.6)
  SourcePackage: rust-coreutils
  UpgradeStatus: Upgraded to questing on 2025-10-13 (18 days ago)

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