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mingw: introduce code to detect whether we're inside a Windows container

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This will come in handy in the next commit.

Signed-off-by: JiSeop Moon <zcube@zcube.kr>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This commit is contained in:
JiSeop Moon
2018-04-23 22:30:18 +09:00
committed by Johannes Schindelin
parent 9f20a3c1c0
commit 1c8afe03e2
2 changed files with 37 additions and 0 deletions
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32
compat/mingw.c
View File

@@ -3145,3 +3145,35 @@ const char *program_data_config(void)
}
return *path.buf ? path.buf : NULL;
}
/*
* Based on https://stackoverflow.com/questions/43002803
*
* [HKLM\SYSTEM\CurrentControlSet\Services\cexecsvc]
* "DisplayName"="@%systemroot%\\system32\\cexecsvc.exe,-100"
* "ErrorControl"=dword:00000001
* "ImagePath"=hex(2):25,00,73,00,79,00,73,00,74,00,65,00,6d,00,72,00,6f,00,
* 6f,00,74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,
* 5c,00,63,00,65,00,78,00,65,00,63,00,73,00,76,00,63,00,2e,00,65,00,78,00,
* 65,00,00,00
* "Start"=dword:00000002
* "Type"=dword:00000010
* "Description"="@%systemroot%\\system32\\cexecsvc.exe,-101"
* "ObjectName"="LocalSystem"
* "ServiceSidType"=dword:00000001
*/
int is_inside_windows_container(void)
{
static int inside_container = -1; /* -1 uninitialized */
const char *key = "SYSTEM\\CurrentControlSet\\Services\\cexecsvc";
HKEY handle = NULL;
if (inside_container != -1)
return inside_container;
inside_container = ERROR_SUCCESS ==
RegOpenKeyExA(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &handle);
RegCloseKey(handle);
return inside_container;
}

5
compat/mingw.h
View File

@@ -695,3 +695,8 @@ int main(int argc, const char **argv);
* Used by Pthread API implementation for Windows
*/
extern int err_win_to_posix(DWORD winerr);
/*
* Check current process is inside Windows Container.
*/
extern int is_inside_windows_container(void);