gsudo Tee hangs when used to save files from Vim

[ecsousa]

I'm trying to reproduce the trick of saving files using sudo from a non-root vim using gsudo. However, gsudo hangs.

Here's the steps:

1. Open a protected file (that requires elevation to be writeen) with a non-elevated vim.exe or gvim.exe
2. Change the file
3. Execute the command in vim: :w !gsudo tee %

Expected result: file should be save with chagnes

Actual result: command hangs

Notes

• you'll also need to have tee installed (either cygwin, msys, etc).
• I've tried using only :w !tee % (for non protected file). It works fine, which indicates that the issue is indeed on gsudo

Here's some reference on how this trick works on unix/linux: https://vim.fandom.com/wiki/Su-write

[gerardog]

Does :w !tee SomeFile.txt works for you? (no gsudo call, and let SomeFile.txt be writeable by a normal user)
Which version of Vim are you using? What is your vimrc file like?

I need a working combination of Vim+Tee first, and then I'll be able to test why gsudo is hanging.
I installed Vim and all !cmd commands are failing for me, including :w !tee % or !cmd.exe

or on gvim:

[gerardog]

Powershell's tee command works with gsudo:

PS C:\test> Write-Output 1234 | gsudo tee MyFile.txt

[ecsousa]

Here's versions and configurations I'm using:

• Vim: 8.2.352 (installed using chocolatey)
• Tee: tee.exe from VIM runtime dir (in path)
• Gsudo: 0.6.0.3 (installed using chocolatey)
• Vimrc: .vim directory from https://github.com/ecsousa/.vim (in windows, cloned into ~/vimfiles)

From your screen shots, it seems you've configured Vim to use PowerShell instead of CMD as shell for external commands -- however, Powershell don't have the < operator for stdin redirect, which is causing error.

Using CMD as Vim's shell, vim.exe hangs like this, after approving UAC prompt:

Results from gvim.exe is better, as it shows the command line Vim tried to execute (also after UAC prompt):

[ecsousa]

Executing a command like this in CMD also freezes:

gsudo tee t2.txt < t1.txt

Note: using only tee t2.txt < t1.txt works without issue

[gerardog]

Try this version.
https://ci.appveyor.com/project/gerardog/gsudo/builds/31254742/artifacts

This seems to fix the 'it hangs' issue. Nonetheless, I found another one while testing tee: If you redirect at least one but not all of StdOut/StdIn/StdErr, then those not redirected are not correctly forwarded...
This fix may allow you to save as admin on vim, but still doesn't makes tee work properly on all scenarios.

[ecsousa]

Just tested, and is working as expected now. Thank you very much for the quick fix!

[gerardog]

Thanks for confirming. This will be released in 0.7