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/**************************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy and Pascal Cuoq, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. */
/* */
/* All rights reserved. This file is distributed under the terms of */
/* the GNU Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
#define CAML_INTERNALS
#include <caml/mlvalues.h>
#include <caml/memory.h>
#include "caml/unixsupport.h"
#include <windows.h>
#include <caml/osdeps.h>
#include <errno.h>
static int has_console(void);
/* Ensures the handle [h] is inheritable. Returns the handle for the
child process in [hStd] and in [to_close] if it needs to be closed
after CreateProcess. */
static int ensure_inheritable(HANDLE h /* in */,
HANDLE * hStd /* out */,
HANDLE * to_close /* out */)
{
DWORD flags;
HANDLE hp;
if (! GetHandleInformation(h, &flags))
return 0;
hp = GetCurrentProcess();
if (! (flags & HANDLE_FLAG_INHERIT)) {
if (! DuplicateHandle(hp, h, hp, hStd, 0, TRUE, DUPLICATE_SAME_ACCESS))
return 0;
*to_close = *hStd;
} else {
*hStd = h;
}
return 1;
}
static DWORD do_create_process_native(wchar_t * exefile, wchar_t * cmdline,
wchar_t * env, HANDLE fd1, HANDLE fd2,
HANDLE fd3, HANDLE * hProcess)
{
PROCESS_INFORMATION pi;
STARTUPINFO si;
DWORD flags, err;
HANDLE to_close1 = INVALID_HANDLE_VALUE, to_close2 = INVALID_HANDLE_VALUE,
to_close3 = INVALID_HANDLE_VALUE;
err = ERROR_SUCCESS;
/* Prepare stdin/stdout/stderr redirection */
ZeroMemory(&si, sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
si.dwFlags = STARTF_USESTDHANDLES;
/* If needed, duplicate the handles fd1, fd2, fd3 to make sure they
are inheritable. */
if (! ensure_inheritable(fd1, &si.hStdInput, &to_close1) ||
! ensure_inheritable(fd2, &si.hStdOutput, &to_close2) ||
! ensure_inheritable(fd3, &si.hStdError, &to_close3)) {
err = GetLastError(); goto ret;
}
/* If we do not have a console window, then we must create one
before running the process (keep it hidden for appearance).
If we are starting a GUI application, the newly created
console should not matter. */
if (has_console())
flags = 0;
else {
flags = CREATE_NEW_CONSOLE;
si.dwFlags = (STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES);
si.wShowWindow = SW_HIDE;
}
flags |= CREATE_UNICODE_ENVIRONMENT;
/* Create the process */
if (! CreateProcess(exefile, cmdline, NULL, NULL,
TRUE, flags, env, NULL, &si, &pi)) {
err = GetLastError(); goto ret;
}
CloseHandle(pi.hThread);
ret:
/* Close the handles if we duplicated them above. */
if (to_close1 != INVALID_HANDLE_VALUE) CloseHandle(to_close1);
if (to_close2 != INVALID_HANDLE_VALUE) CloseHandle(to_close2);
if (to_close3 != INVALID_HANDLE_VALUE) CloseHandle(to_close3);
*hProcess = (err == ERROR_SUCCESS) ? pi.hProcess : NULL;
return err;
}
value caml_unix_create_process_native(value cmd, value cmdline, value env,
value fd1, value fd2, value fd3)
{
wchar_t * exefile, * wcmdline, * wenv, * wcmd;
HANDLE hProcess;
DWORD err;
int size;
caml_unix_check_path(cmd, "create_process");
if (! caml_string_is_c_safe(cmdline))
caml_unix_error(EINVAL, "create_process", cmdline);
/* [env] is checked for null bytes at construction time, see unix.ml */
wcmd = caml_stat_strdup_to_utf16(String_val(cmd));
exefile = caml_search_exe_in_path(wcmd);
caml_stat_free(wcmd);
wcmdline = caml_stat_strdup_to_utf16(String_val(cmdline));
if (Is_some(env)) {
env = Some_val(env);
size =
caml_win32_multi_byte_to_wide_char(String_val(env),
caml_string_length(env), NULL, 0);
wenv = caml_stat_alloc((size + 1)*sizeof(wchar_t));
caml_win32_multi_byte_to_wide_char(String_val(env),
caml_string_length(env), wenv, size);
wenv[size] = 0;
} else {
wenv = NULL;
}
err =
do_create_process_native(exefile, wcmdline, wenv, Handle_val(fd1),
Handle_val(fd2), Handle_val(fd3), &hProcess);
if (wenv != NULL) caml_stat_free(wenv);
caml_stat_free(wcmdline);
caml_stat_free(exefile);
if (err != ERROR_SUCCESS) {
caml_win32_maperr(err);
caml_uerror("create_process", cmd);
}
/* Return the process handle as pseudo-PID
(this is consistent with the wait() emulation in the MSVC C library */
return Val_long(hProcess);
}
CAMLprim value caml_unix_create_process(value * argv, int argn)
{
return caml_unix_create_process_native(argv[0], argv[1], argv[2],
argv[3], argv[4], argv[5]);
}
static int has_console(void)
{
HANDLE h;
h = CreateFile(L"CONOUT$", GENERIC_WRITE, FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (h == INVALID_HANDLE_VALUE) {
return 0;
} else {
CloseHandle(h);
return 1;
}
}
CAMLprim value caml_unix_terminate_process(value v_pid)
{
return (Val_bool(TerminateProcess((HANDLE) Long_val(v_pid), 0)));
}
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