Why “Write-Host” works differently from PowerShell function and timer handler?
I have 1809 Windows 10 box with PowerShell Core 6.1.1
Given following code sample:
function Test() {
Write-Host "Test"
}
function Invoke-Test() {
$timer = New-Object System.Timers.Timer
$timer.AutoReset = $false
$timer.Interval = 1
Register-ObjectEvent -InputObject $timer -EventName Elapsed -Action {
Test
}
$timer.Enabled = $true
}
If I invoke "Test" function, I get "Test" output as expected:
But if I schedule invocation with a timer, command prompt is completely messed up:
I vaguely understand that it's something related to internal "readline" and console mechanic, but is it any way to produce newline output followed by a command prompt from a timer/handle in powershell?
powershell
asked Nov 15 '18 at 7:31
grigoryvpgrigoryvp
11.6k47138249
add a comment |
I have 1809 Windows 10 box with PowerShell Core 6.1.1
Given following code sample:
function Test() {
Write-Host "Test"
}
function Invoke-Test() {
$timer = New-Object System.Timers.Timer
$timer.AutoReset = $false
$timer.Interval = 1
Register-ObjectEvent -InputObject $timer -EventName Elapsed -Action {
Test
}
$timer.Enabled = $true
}
If I invoke "Test" function, I get "Test" output as expected:
But if I schedule invocation with a timer, command prompt is completely messed up:
I vaguely understand that it's something related to internal "readline" and console mechanic, but is it any way to produce newline output followed by a command prompt from a timer/handle in powershell?
powershell
asked Nov 15 '18 at 7:31
grigoryvpgrigoryvp
11.6k47138249
1
I am familiar with this issue. Interestingly, I just tried it with PowerShell v5.1.17134.407 and it does output the prompt. Apparently this behavior was changed in the newest release? Worth investigating. Not sure about pwsh core of course.
– marsze
Nov 15 '18 at 8:31
add a comment |
I have 1809 Windows 10 box with PowerShell Core 6.1.1
Given following code sample:
function Test() {
Write-Host "Test"
}
function Invoke-Test() {
$timer = New-Object System.Timers.Timer
$timer.AutoReset = $false
$timer.Interval = 1
Register-ObjectEvent -InputObject $timer -EventName Elapsed -Action {
Test
}
$timer.Enabled = $true
}
If I invoke "Test" function, I get "Test" output as expected:
But if I schedule invocation with a timer, command prompt is completely messed up:
I vaguely understand that it's something related to internal "readline" and console mechanic, but is it any way to produce newline output followed by a command prompt from a timer/handle in powershell?
powershell
asked Nov 15 '18 at 7:31
grigoryvpgrigoryvp
11.6k47138249
I have 1809 Windows 10 box with PowerShell Core 6.1.1
Given following code sample:
function Test() {
Write-Host "Test"
}
function Invoke-Test() {
$timer = New-Object System.Timers.Timer
$timer.AutoReset = $false
$timer.Interval = 1
Register-ObjectEvent -InputObject $timer -EventName Elapsed -Action {
Test
}
$timer.Enabled = $true
}
If I invoke "Test" function, I get "Test" output as expected:
But if I schedule invocation with a timer, command prompt is completely messed up:
I vaguely understand that it's something related to internal "readline" and console mechanic, but is it any way to produce newline output followed by a command prompt from a timer/handle in powershell?
powershell
powershell
asked Nov 15 '18 at 7:31
grigoryvpgrigoryvp
11.6k47138249
asked Nov 15 '18 at 7:31
grigoryvpgrigoryvp
11.6k47138249
asked Nov 15 '18 at 7:31
grigoryvpgrigoryvp
11.6k47138249
asked Nov 15 '18 at 7:31
grigoryvpgrigoryvp
11.6k47138249
asked Nov 15 '18 at 7:31
grigoryvpgrigoryvp
11.6k47138249
11.6k47138249
1
I am familiar with this issue. Interestingly, I just tried it with PowerShell v5.1.17134.407 and it does output the prompt. Apparently this behavior was changed in the newest release? Worth investigating. Not sure about pwsh core of course.
– marsze
Nov 15 '18 at 8:31
add a comment |
1
I am familiar with this issue. Interestingly, I just tried it with PowerShell v5.1.17134.407 and it does output the prompt. Apparently this behavior was changed in the newest release? Worth investigating. Not sure about pwsh core of course.
– marsze
Nov 15 '18 at 8:31
1
1
I am familiar with this issue. Interestingly, I just tried it with PowerShell v5.1.17134.407 and it does output the prompt. Apparently this behavior was changed in the newest release? Worth investigating. Not sure about pwsh core of course.
– marsze
Nov 15 '18 at 8:31
I am familiar with this issue. Interestingly, I just tried it with PowerShell v5.1.17134.407 and it does output the prompt. Apparently this behavior was changed in the newest release? Worth investigating. Not sure about pwsh core of course.
– marsze
Nov 15 '18 at 8:31
add a comment |
1 Answer
1
active
oldest
votes
Register-ObjectEvent -InputObject $timer -EventName Elapsed -SourceIdentifier Timer.Test -Action {
Test
}
$timer.Enabled = $true
PS C:> $Subscriber = Get-EventSubscriber -SourceIdentifier Timer.Test
PS C:> $Subscriber.action | Format-List -Property *
The command property should hold the results of your “test” function.
The url below has detailed explanations.
https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/get-eventsubscriber?view=powershell-6
edited Dec 29 '18 at 8:56
Cœur
18.5k9110148
answered Dec 29 '18 at 0:14
Sully2_7Sully2_7
1
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
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Register-ObjectEvent -InputObject $timer -EventName Elapsed -SourceIdentifier Timer.Test -Action {
Test
}
$timer.Enabled = $true
PS C:> $Subscriber = Get-EventSubscriber -SourceIdentifier Timer.Test
PS C:> $Subscriber.action | Format-List -Property *
The command property should hold the results of your “test” function.
The url below has detailed explanations.
https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/get-eventsubscriber?view=powershell-6
edited Dec 29 '18 at 8:56
Cœur
18.5k9110148
answered Dec 29 '18 at 0:14
Sully2_7Sully2_7
1
add a comment |
Register-ObjectEvent -InputObject $timer -EventName Elapsed -SourceIdentifier Timer.Test -Action {
Test
}
$timer.Enabled = $true
PS C:> $Subscriber = Get-EventSubscriber -SourceIdentifier Timer.Test
PS C:> $Subscriber.action | Format-List -Property *
The command property should hold the results of your “test” function.
The url below has detailed explanations.
https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/get-eventsubscriber?view=powershell-6
edited Dec 29 '18 at 8:56
Cœur
18.5k9110148
answered Dec 29 '18 at 0:14
Sully2_7Sully2_7
1
add a comment |
Register-ObjectEvent -InputObject $timer -EventName Elapsed -SourceIdentifier Timer.Test -Action {
Test
}
$timer.Enabled = $true
PS C:> $Subscriber = Get-EventSubscriber -SourceIdentifier Timer.Test
PS C:> $Subscriber.action | Format-List -Property *
The command property should hold the results of your “test” function.
The url below has detailed explanations.
https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/get-eventsubscriber?view=powershell-6
edited Dec 29 '18 at 8:56
Cœur
18.5k9110148
answered Dec 29 '18 at 0:14
Sully2_7Sully2_7
1
Register-ObjectEvent -InputObject $timer -EventName Elapsed -SourceIdentifier Timer.Test -Action {
Test
}
$timer.Enabled = $true
PS C:> $Subscriber = Get-EventSubscriber -SourceIdentifier Timer.Test
PS C:> $Subscriber.action | Format-List -Property *
The command property should hold the results of your “test” function.
The url below has detailed explanations.
https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/get-eventsubscriber?view=powershell-6
edited Dec 29 '18 at 8:56
Cœur
18.5k9110148
answered Dec 29 '18 at 0:14
Sully2_7Sully2_7
1
edited Dec 29 '18 at 8:56
Cœur
18.5k9110148
edited Dec 29 '18 at 8:56
Cœur
18.5k9110148
edited Dec 29 '18 at 8:56
Cœur
18.5k9110148
18.5k9110148
answered Dec 29 '18 at 0:14
Sully2_7Sully2_7
1
answered Dec 29 '18 at 0:14
Sully2_7Sully2_7
1
answered Dec 29 '18 at 0:14
Sully2_7Sully2_7
1
1
add a comment |
add a comment |
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I am familiar with this issue. Interestingly, I just tried it with PowerShell v5.1.17134.407 and it does output the prompt. Apparently this behavior was changed in the newest release? Worth investigating. Not sure about pwsh core of course.
– marsze
Nov 15 '18 at 8:31