Signed-off-by: Lei Li <li...@linux.vnet.ibm.com> --- qga/commands-win32.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/qga/commands-win32.c b/qga/commands-win32.c index 7e8ecb3..0a2bb34 100644 --- a/qga/commands-win32.c +++ b/qga/commands-win32.c @@ -22,6 +22,12 @@ #define SHTDN_REASON_FLAG_PLANNED 0x80000000 #endif +/* multiple of 100 nanoseconds elapsed between windows baseline + (1/1/1601) and Unix Epoch (1/1/1970), accounting for leap years */ +#define W32_FT_OFFSET (10000000ULL * 60 * 60 * 24 * \ + (365 * (1970 - 1601) + \ + (1970 - 1601) / 4 - 3)) + static void acquire_privilege(const char *name, Error **err) { HANDLE token; @@ -108,6 +114,32 @@ void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err) } } +int64_t qmp_guest_get_time(Error **errp) +{ + SYSTEMTIME *ts = g_malloc0(sizeof(SYSTEMTIME)); + int64_t time_ns; + union { + UINT64 ns100; + FILETIME tf; + } time; + + GetSystemTime(ts); + if (!ts) { + slog("guest-get-time failed: %d", GetLastError()); + error_setg_errno(errp, errno, "Failed to get time"); + return -1; + } + + if (!SystemTimeToFileTime(ts, &time.tf)) { + error_setg_errno(errp, errno, "Failed to convert system time"); + return -1; + } + + time_ns = (int64_t)((time.ns100 - W32_FT_OFFSET) * 100); + + return time_ns; +} + int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err) { error_set(err, QERR_UNSUPPORTED); -- 1.7.11.7