Initial import

libc/calls/hefty/spawnve-nt.c

@@ -0,0 +1,98 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ This program is free software; you can redistribute it and/or modify         │
+│ it under the terms of the GNU General Public License as published by         │
+│ the Free Software Foundation; version 2 of the License.                      │
+│                                                                              │
+│ This program is distributed in the hope that it will be useful, but          │
+│ WITHOUT ANY WARRANTY; without even the implied warranty of                   │
+│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU             │
+│ General Public License for more details.                                     │
+│                                                                              │
+│ You should have received a copy of the GNU General Public License            │
+│ along with this program; if not, write to the Free Software                  │
+│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA                │
+│ 02110-1301 USA                                                               │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/bits/xchg.h"
+#include "libc/calls/calls.h"
+#include "libc/calls/hefty/internal.h"
+#include "libc/calls/hefty/ntspawn.h"
+#include "libc/calls/hefty/spawn.h"
+#include "libc/calls/internal.h"
+#include "libc/nt/enum/startf.h"
+#include "libc/nt/files.h"
+#include "libc/nt/ipc.h"
+#include "libc/nt/process.h"
+#include "libc/nt/runtime.h"
+#include "libc/nt/startupinfo.h"
+#include "libc/nt/struct/processinformation.h"
+#include "libc/str/str.h"
+#include "libc/sysv/consts/fileno.h"
+#include "libc/sysv/consts/o.h"
+
+textwindows int spawnve$nt(unsigned flags, int stdiofds[3], const char *program,
+                           char *const argv[], char *const envp[]) {
+  int pid;
+  size_t i;
+  int tubes[3];
+  int64_t handle, h, *x, *y;
+  struct NtStartupInfo sti;
+  struct NtProcessInformation procinfo;
+
+  handle = 0;
+  memset(&sti, 0, sizeof(sti));
+  sti.cb = sizeof(sti);
+  sti.dwFlags = kNtStartfUsestdhandles;
+
+  if ((pid = createfd()) == -1) return -1;
+
+  for (i = 0; i < 3; ++i) {
+    if (stdiofds[i] == -1) {
+      x = &h;
+      y = &sti.stdiofds[i];
+      if (kIoMotion[i]) xchg(&x, &y);
+      if ((tubes[i] = createfd()) != -1 &&
+          CreatePipe(x, y, &kNtIsInheritable, 0)) {
+        g_fds.p[tubes[i]].handle = h;
+      } else {
+        handle = -1;
+      }
+    } else {
+      sti.stdiofds[i] = g_fds.p[stdiofds[i]].handle;
+    }
+  }
+
+  if (handle != -1 &&
+      ntspawn(program, argv, envp, NULL, NULL,
+              (flags & SPAWN_TABULARASA) ? false : true,
+              (flags & SPAWN_DETACH)
+                  ? (kNtCreateNewProcessGroup | kNtDetachedProcess |
+                     kNtCreateBreakawayFromJob)
+                  : 0,
+              NULL, &sti, &procinfo) != -1) {
+    CloseHandle(procinfo.hThread);
+    handle = procinfo.hProcess;
+  }
+
+  for (i = 0; i < 3; ++i) {
+    if (stdiofds[i] == -1) {
+      if (handle != -1) {
+        stdiofds[i] = tubes[i];
+        g_fds.p[tubes[i]].kind = kFdFile;
+        g_fds.p[tubes[i]].flags = O_CLOEXEC;
+        CloseHandle(sti.stdiofds[i]);
+      } else {
+        CloseHandle(tubes[i]);
+      }
+    }
+  }
+
+  g_fds.p[pid].kind = kFdProcess;
+  g_fds.p[pid].handle = handle;
+  g_fds.p[pid].flags = flags;
+  return pid;
+}