diff options
Diffstat (limited to 'win32/win32.c')
| -rw-r--r-- | win32/win32.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/win32/win32.c b/win32/win32.c index e79bbf2ba..dec12eb8d 100644 --- a/win32/win32.c +++ b/win32/win32.c @@ -3829,6 +3829,40 @@ rb_w32_getpid(void) return pid; } + +rb_pid_t +rb_w32_getppid(void) +{ + static long (WINAPI *pNtQueryInformationProcess)(HANDLE, int, void *, ULONG, ULONG *) = NULL; + rb_pid_t ppid = 0; + + if (!IsWin95() && rb_w32_osver() >= 5) { + if (!pNtQueryInformationProcess) { + HANDLE hNtDll = GetModuleHandle("ntdll.dll"); + if (hNtDll) { + pNtQueryInformationProcess = (long (WINAPI *)(HANDLE, int, void *, ULONG, ULONG *))GetProcAddress(hNtDll, "NtQueryInformationProcess"); + if (pNtQueryInformationProcess) { + struct { + long ExitStatus; + void* PebBaseAddress; + ULONG AffinityMask; + ULONG BasePriority; + ULONG UniqueProcessId; + ULONG ParentProcessId; + } pbi; + ULONG len; + long ret = pNtQueryInformationProcess(GetCurrentProcess(), 0, &pbi, sizeof(pbi), &len); + if (!ret) { + ppid = pbi.ParentProcessId; + } + } + } + } + } + + return ppid; +} + int rb_w32_fclose(FILE *fp) { |