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mdbx-windows: refix WSL1/WSL2 detection.

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Refix https://github.com/erthink/libmdbx/issues/97
This commit is contained in:
Leonid Yuriev 2021-05-25 15:18:15 +03:00
parent 2b161db6d8
commit bcc546bdfa
1 changed files with 15 additions and 11 deletions
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26
src/lck-posix.c
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@ -36,7 +36,11 @@ static __cold uint8_t probe_for_WSL(const char *tag) {
const char *const wsl = strstr(tag, "wsl"); const char *const wsl = strstr(tag, "wsl");
if (wsl && wsl[3] >= '2' && wsl[3] <= '9') if (wsl && wsl[3] >= '2' && wsl[3] <= '9')
return wsl[3] - '0'; return wsl[3] - '0';
return (WSL || wsl || strcasestr(tag, "Microsoft")) ? 1 : 0; if (WSL || wsl || strcasestr(tag, "Microsoft"))
/* Expecting no new kernel within WSL1, either it will explicitly
* marked by an appropriate WSL-version hint. */
return (mdbx_linux_kernel_version < /* 4.19.x */ 0x04130000) ? 1 : 2;
return 0;
} }
#endif /* Linux */ #endif /* Linux */
@ -46,16 +50,6 @@ mdbx_global_constructor(void) {
#if defined(__linux__) || defined(__gnu_linux__) #if defined(__linux__) || defined(__gnu_linux__)
struct utsname buffer; struct utsname buffer;
if (uname(&buffer) == 0) { if (uname(&buffer) == 0) {
/* "Official" way of detecting WSL1 but not WSL2
* https://github.com/Microsoft/WSL/issues/423#issuecomment-221627364
*
* WARNING: False negative detection of WSL1 will result in DATA LOSS!
* So, the REQUIREMENTS for this code:
* 1. MUST detect WSL1 without false-negatives.
* 2. DESIRABLE detect WSL2 but without the risk of violating the first. */
mdbx_RunningOnWSL1 = probe_for_WSL(buffer.version) == 1 ||
probe_for_WSL(buffer.sysname) == 1 ||
probe_for_WSL(buffer.release) == 1;
int i = 0; int i = 0;
char *p = buffer.release; char *p = buffer.release;
while (*p && i < 4) { while (*p && i < 4) {
@ -71,6 +65,16 @@ mdbx_global_constructor(void) {
++p; ++p;
} }
} }
/* "Official" way of detecting WSL1 but not WSL2
* https://github.com/Microsoft/WSL/issues/423#issuecomment-221627364
*
* WARNING: False negative detection of WSL1 will result in DATA LOSS!
* So, the REQUIREMENTS for this code:
* 1. MUST detect WSL1 without false-negatives.
* 2. DESIRABLE detect WSL2 but without the risk of violating the first. */
mdbx_RunningOnWSL1 = probe_for_WSL(buffer.version) == 1 ||
probe_for_WSL(buffer.sysname) == 1 ||
probe_for_WSL(buffer.release) == 1;
} }
#endif /* Linux */ #endif /* Linux */