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Powershell Check Exit Code
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Powershell Exit Code Variable
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you, helping each other. Join them; it only takes a minute: Sign up Powershell: return error exit code if not match a string up vote 1 down vote favorite 1 I found that $(Invoke-Expression hostname) -eq 'mycomputername' https://weblogs.asp.net/soever/returning-an-exit-code-from-a-powershell-script whether it is matched or not, the exitcode must be 0 this behavior is different from linux ,i.e, if not match error code exit 1 Is there any short command in powershell that can return error exit code if doesn't match the string? powershell share|improve this question asked Feb 20 '14 at 7:47 Kit Ho 7,5661569114 add a comment| 5 Answers 5 active oldest votes up vote 3 down vote In an script you can http://stackoverflow.com/questions/21901377/powershell-return-error-exit-code-if-not-match-a-string change exit code using exit keyword. A normal termination will set the exitcode to 0 An uncaught THROW will set the exitcode to 1 The EXIT statement will stop the process and set the exitcode to whatever is specified. In your case I'ld do something like this if ( $(hostname) -eq 'mycomputername') { exit 0 } else { exit 1 } share|improve this answer answered Feb 20 '14 at 8:45 CB. 34.6k25674 An uncaught THROW did not set the exitcode to1 for me, on PowerShell v3.0. –JamesQMurphy Aug 31 at 15:56 add a comment| up vote 0 down vote Are you looking for something like this? C:\>powershell -command "& { if($(Invoke-Expression hostname) -eq 'wrongname'){ exit 0 } else { exit 1 } } " C:\>echo %errorlevel% 1 C:\>powershell -command "& { if($(Invoke-Expression hostname) -eq 'rightname'){ exit 0 } else { exit 1 } } " C:\>echo %errorlevel% 0 share|improve this answer answered Feb 20 '14 at 8:48 vonPryz 7,48121131 yes you are right is there any better way to do ? looks like very clusmy –Kit Ho Feb 20 '14 at 10:40 @KitHo Might be. Can you explain a bit more what you are trying to achieve? Streamlining depends on intended use case. –vonPryz Feb 20 '14 at 10:46 What i want to achieve is th
being able to handle errors helps to ensure that an unexpected event will not go on to wreck the system you are working on. Take the example below. Every week in our sample company (MyCompany.Com) Human Resources are going http://www.vexasoft.com/blogs/powershell/7255220-powershell-tutorial-try-catch-finally-and-error-handling-in-powershell to upload a list telling us who should have access to the Expenses database. If a name isn’t in the list from HR we’re going to remove it from the group and that user will no longer be able to log expense claims: $AuthorizedUsers= Get-Content \\ FileServer\HRShare\UserList.txt $CurrentUsers=Get-ADGroupMember "Expenses Claimants" Foreach($User in $CurrentUsers) { If($AuthorizedUsers -notcontains $User) { Remove-ADGroupMember -Identity "Expenses Claimants" -User $User } } Now, you can see where this is going to go wrong. exit code One week HR doesn’t get around to uploading the list or, just as we are about to access the list, the file server dies. Suddenly PowerShell throws an error on the Get-Content cmdlet and the $AuthorizedUser variable remains empty. Because our script doesn’t handle errors, it continues to run and, in a very short space of time, it has removed every user from our expenses group. Pretty soon the irate phone calls start flooding in and life powershell exit code gets a little less happy. The way to avoid all this is to catch the errors and then handle the event that caused them (which in this case is halt the script and have a shout at someone in HR). Terminating and Non-Terminating Errors One of the key things to know when catching errors is that only certain errors can be caught by default. Errors come in two types – terminating and non-terminating. A terminating error is an error that will halt a function or operation. If you make a syntax error or run out of memory, that is a terminating error. Terminating errors can be caught and handled. Non-terminating errors allow Powershell to continue and usually come from cmdlets or other managed situations. Under normal circumstances they cannot be caught by Try-Catch-Finally. The Get-Content error in the example above is a non-terminating error. Treating Non-Terminating Errors as Terminating So how do you catch a Non-Terminating error? Basically, you tell PowerShell to treat it as terminating. To do this you use the ErrorAction parameter. Every PowerShell cmdlet supports ErrorAction. By specifying -ErrorAction Stop on the end of a cmdlet you ensure that any errors it throws are treated as terminating and can be caught. In our example above we are going to change our Get-Content line to: $AuthorizedUsers= Get-Content \\ FileServer\HRShare\UserList.txt -ErrorAction Stop Treating All Errors as Terminating I