Add new config option to support thread token based agent process to … #133
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…start - Create agent proces from the thread token instead of current process. This is usefull when winpty.dll is called by Windows Service program to impersonate to the original user from a remote process.
rprichard
reviewed
Nov 13, 2017
src/include/winpty_constants.h
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| @@ -76,11 +76,18 @@ | |||
| * See https://github.com/rprichard/winpty/issues/58. */ | |||
| #define WINPTY_FLAG_ALLOW_CURPROC_DESKTOP_CREATION 0x8ull | |||
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| /* Create agent proces from the thread token instead of current process. | |||
src/include/winpty_constants.h
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| @@ -76,11 +76,18 @@ | |||
| * See https://github.com/rprichard/winpty/issues/58. */ | |||
| #define WINPTY_FLAG_ALLOW_CURPROC_DESKTOP_CREATION 0x8ull | |||
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| /* Create agent proces from the thread token instead of current process. | |||
| * This is usefull when winpty.dll is called by Windows Service program to | |||
| &sui, | ||
| &pi); | ||
| if (!success) { | ||
| CloseHandle(token); |
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I'd prefer this code use RAII (i.e. OwnedHandle), but I can fix that up myself after merging the change.
src/libwinpty/winpty.cc
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| nullptr, | ||
| nullptr, | ||
| FALSE, | ||
| CREATE_DEFAULT_ERROR_MODE | CREATE_BREAKAWAY_FROM_JOB | CREATE_UNICODE_ENVIRONMENT | NORMAL_PRIORITY_CLASS, |
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I'm curious about these creation flags.
- startAgentProcess is already called with a creation flags parameter, which is currently only set to either
DETACHED_PROCESS(for--create-desktop) orCREATE_NEW_CONSOLE(normal code path). This code doesn't ever useCREATE_NEW_CONSOLE, so I assume it reuses its parent's console, if it has one? - Regarding the specific flags:
CREATE_DEFAULT_ERROR_MODE: I wonder if this ought to be the default behavior for winpty -- there was a complaint a while ago about crash handling and winpty (When run in Terminal a programs unhandled exceptions don't produce debug dialog in win32 microsoft/vscode#32134), but I never looked into it. Maybe this creation flag fixes the problem?CREATE_UNICODE_ENVIRONMENT:lpEnvironmentis null; does this do anything?CREATE_BREAKAWAY_FROM_JOBandNORMAL_PRIORITY_CLASS: I wonder if these flags should really be set byWINPTY_FLAG_IMPERSONATE_THREADor whether they're orthogonal settings. Maybe winpty needs a way to specify arbitrary creation flags for the agent and/or the agent's child?
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can you push this change? |
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Create agent proces from the thread token instead of current process. This is usefull when winpty.dll is called by Windows Service program to impersonate to the original user from a remote process.