Permission denied when trying to read stdout of another program in Snap

[bjbr-dev]

Steps to reproduce

PS > $foo = docker -v

Expected behavior

I expect the variable $foo to contain the string Docker version 19.03.11, build dd360c7 since running docker -v like below returns that data

PS > docker -v
Docker version 19.03.11, build dd360c7

Actual behavior

It errors

write /dev/stdout: permission denied

Environment data

Name                           Value
----                           -----
PSVersion                      7.1.0
PSEdition                      Core
GitCommitId                    7.1.0
OS                             Linux 5.8.0-33-generic #36-Ubuntu SMP Wed Dec 9…
Platform                       Unix
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0


Ubuntu version: 20.10
Installed powershell with Snap

I originally raised this as a stackoverflow question -> https://stackoverflow.com/questions/65260463/how-to-capture-docker-version-in-powershell-cross-platform but I believe it is a bug.

The equivalent code works in bash

#> VERSION=$(docker -v)
#> echo $VERSION

I believe it also works on Ubuntu 20.04 when pwsh is installed with apt-get, but as fair as I can tell you can only install pwsh with snap on 20.10

[mklement0]

Just to highlight crucial information: It sounds like the problem is the snap package, specifically, possibly related to sandboxing.

Also, can you please update the title of this issue to make it descriptive?

[bjbr-dev]

Apologies, I missed the ability to set the issue name first time round - updated.

I agree, it does seem to be something about the snap package - I believe it works when powershell is installed with apt-get. Unfortunately this doesn't seem possible for Ubuntu 20.10, only for Ubuntu 20.04 and below

[microsoft-github-policy-service]

This issue has not had any activity in 6 months, if this is a bug please try to reproduce on the latest version of PowerShell and reopen a new issue and reference this issue if this is still a blocker for you.

[microsoft-github-policy-service]

This issue has not had any activity in 6 months, if this is a bug please try to reproduce on the latest version of PowerShell and reopen a new issue and reference this issue if this is still a blocker for you.

[microsoft-github-policy-service]

This issue has not had any activity in 6 months, if this is a bug please try to reproduce on the latest version of PowerShell and reopen a new issue and reference this issue if this is still a blocker for you.

[microsoft-github-policy-service]

This issue has been marked as "No Activity" as there has been no activity for 6 months. It has been closed for housekeeping purposes.