[Bug 1260078] [NEW] vim should complain if viminfo is not writable

[Edward Z. Yang]

Public bug reported:

The situation is described quite well here:
http://stackoverflow.com/a/10755253/23845

Steps to reproduce:
1. Create a new account with sudoer permission
2. Run 'sudo vim' (i.e. run vim as root, from the account)
3. Use vim and check if your command history is saved

Expected result: Command history is saved

Actual result: Command history is not saved. The ~/.viminfo file is
owned by root and not readable/writable

Suggested fix: At the very least, vim should complain if it cannot read
the .viminfo file. But ideally, 'sudo vim' would avoid creating a
.viminfo file with the wrong permissions in the first place.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: vim 2:7.4.000-1ubuntu2
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
Uname: Linux 3.11.0-14-generic x86_64
NonfreeKernelModules: openafs
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
Date: Wed Dec 11 13:09:07 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-11-21 (20 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MarkForUpload: True
SourcePackage: vim
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: vim (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug saucy

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https://bugs.launchpad.net/bugs/1260078

Title:
  vim should complain if viminfo is not writable

Status in “vim” package in Ubuntu:
  New

Bug description:
  The situation is described quite well here:
  http://stackoverflow.com/a/10755253/23845

  Steps to reproduce:
  1. Create a new account with sudoer permission
  2. Run 'sudo vim' (i.e. run vim as root, from the account)
  3. Use vim and check if your command history is saved

  Expected result: Command history is saved

  Actual result: Command history is not saved. The ~/.viminfo file is
  owned by root and not readable/writable

  Suggested fix: At the very least, vim should complain if it cannot
  read the .viminfo file. But ideally, 'sudo vim' would avoid creating a
  .viminfo file with the wrong permissions in the first place.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: vim 2:7.4.000-1ubuntu2
  ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
  Uname: Linux 3.11.0-14-generic x86_64
  NonfreeKernelModules: openafs
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  Date: Wed Dec 11 13:09:07 2013
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-11-21 (20 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MarkForUpload: True
  SourcePackage: vim
  UpgradeStatus: No upgrade log present (probably fresh install)

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