module os import strings fn C.GenerateConsoleCtrlEvent(event u32, pgid u32) bool fn C.GetModuleHandleA(name &char) HMODULE fn C.GetProcAddress(handle voidptr, procname &u8) voidptr fn C.TerminateProcess(process HANDLE, exit_code u32) bool fn C.PeekNamedPipe(hNamedPipe voidptr, lpBuffer voidptr, nBufferSize int, lpBytesRead voidptr, lpTotalBytesAvail voidptr, lpBytesLeftThisMessage voidptr) bool type FN_NTSuspendResume = fn (voidptr) fn ntdll_fn(name &u8) FN_NTSuspendResume { ntdll := C.GetModuleHandleA(c'NTDLL') if ntdll == 0 { return FN_NTSuspendResume(0) } the_fn := FN_NTSuspendResume(C.GetProcAddress(ntdll, name)) return the_fn } fn failed_cfn_report_error(ok bool, label string) { if ok { return } error_num := int(C.GetLastError()) error_msg := get_error_msg(error_num) eprintln('failed $label: $error_msg') exit(1) } type PU32 = &u32 // TODO: the PU32 alias is used to compensate for the wrong number of &/* // that V does when doing: `h := &&u32(p)`, which should have casted // p to a double pointer. fn close_valid_handle(p voidptr) { h := &PU32(p) if *h != &u32(0) { C.CloseHandle(*h) unsafe { *h = &u32(0) } } } pub struct WProcess { pub mut: proc_info ProcessInformation command_line [65536]u8 child_stdin &u32 // child_stdout_read &u32 child_stdout_write &u32 // child_stderr_read &u32 child_stderr_write &u32 } fn (mut p Process) win_spawn_process() int { mut wdata := &WProcess{ child_stdin: 0 child_stdout_read: 0 child_stdout_write: 0 child_stderr_read: 0 child_stderr_write: 0 } p.wdata = voidptr(wdata) mut start_info := StartupInfo{ lp_reserved2: 0 lp_reserved: 0 lp_desktop: 0 lp_title: 0 cb: sizeof(C.PROCESS_INFORMATION) } if p.use_stdio_ctl { mut sa := SecurityAttributes{} sa.n_length = sizeof(C.SECURITY_ATTRIBUTES) sa.b_inherit_handle = true create_pipe_ok1 := C.CreatePipe(voidptr(&wdata.child_stdout_read), voidptr(&wdata.child_stdout_write), voidptr(&sa), 0) failed_cfn_report_error(create_pipe_ok1, 'CreatePipe stdout') set_handle_info_ok1 := C.SetHandleInformation(wdata.child_stdout_read, C.HANDLE_FLAG_INHERIT, 0) failed_cfn_report_error(set_handle_info_ok1, 'SetHandleInformation') create_pipe_ok2 := C.CreatePipe(voidptr(&wdata.child_stderr_read), voidptr(&wdata.child_stderr_write), voidptr(&sa), 0) failed_cfn_report_error(create_pipe_ok2, 'CreatePipe stderr') set_handle_info_ok2 := C.SetHandleInformation(wdata.child_stderr_read, C.HANDLE_FLAG_INHERIT, 0) failed_cfn_report_error(set_handle_info_ok2, 'SetHandleInformation stderr') start_info.h_std_input = wdata.child_stdin start_info.h_std_output = wdata.child_stdout_write start_info.h_std_error = wdata.child_stderr_write start_info.dw_flags = u32(C.STARTF_USESTDHANDLES) } cmd := '$p.filename ' + p.args.join(' ') C.ExpandEnvironmentStringsW(cmd.to_wide(), voidptr(&wdata.command_line[0]), 32768) mut creation_flags := int(C.NORMAL_PRIORITY_CLASS) if p.use_pgroup { creation_flags |= C.CREATE_NEW_PROCESS_GROUP } create_process_ok := C.CreateProcessW(0, &wdata.command_line[0], 0, 0, C.TRUE, creation_flags, 0, 0, voidptr(&start_info), voidptr(&wdata.proc_info)) failed_cfn_report_error(create_process_ok, 'CreateProcess') if p.use_stdio_ctl { close_valid_handle(&wdata.child_stdout_write) close_valid_handle(&wdata.child_stderr_write) } p.pid = int(wdata.proc_info.dw_process_id) return p.pid } fn (mut p Process) win_stop_process() { the_fn := ntdll_fn(c'NtSuspendProcess') if voidptr(the_fn) == 0 { return } wdata := &WProcess(p.wdata) the_fn(wdata.proc_info.h_process) } fn (mut p Process) win_resume_process() { the_fn := ntdll_fn(c'NtResumeProcess') if voidptr(the_fn) == 0 { return } wdata := &WProcess(p.wdata) the_fn(wdata.proc_info.h_process) } fn (mut p Process) win_kill_process() { wdata := &WProcess(p.wdata) C.TerminateProcess(wdata.proc_info.h_process, 3) } fn (mut p Process) win_kill_pgroup() { wdata := &WProcess(p.wdata) C.GenerateConsoleCtrlEvent(C.CTRL_BREAK_EVENT, wdata.proc_info.dw_process_id) C.Sleep(20) C.TerminateProcess(wdata.proc_info.h_process, 3) } fn (mut p Process) win_wait() { exit_code := u32(1) mut wdata := &WProcess(p.wdata) if p.wdata != 0 { C.WaitForSingleObject(wdata.proc_info.h_process, C.INFINITE) C.GetExitCodeProcess(wdata.proc_info.h_process, voidptr(&exit_code)) close_valid_handle(&wdata.child_stdin) close_valid_handle(&wdata.child_stdout_write) close_valid_handle(&wdata.child_stderr_write) close_valid_handle(&wdata.proc_info.h_process) close_valid_handle(&wdata.proc_info.h_thread) } p.status = .exited p.code = int(exit_code) } fn (mut p Process) win_is_alive() bool { exit_code := u32(0) wdata := &WProcess(p.wdata) C.GetExitCodeProcess(wdata.proc_info.h_process, voidptr(&exit_code)) if exit_code == C.STILL_ACTIVE { return true } return false } /////////////// fn (mut p Process) win_write_string(idx int, s string) { panic('Process.write_string $idx is not implemented yet') } fn (mut p Process) win_read_string(idx int, maxbytes int) (string, int) { mut wdata := &WProcess(p.wdata) if unsafe { wdata == 0 } { return '', 0 } mut rhandle := &u32(0) if idx == 1 { rhandle = wdata.child_stdout_read } if idx == 2 { rhandle = wdata.child_stderr_read } if rhandle == 0 { return '', 0 } mut bytes_avail := int(0) if !C.PeekNamedPipe(rhandle, voidptr(0), int(0), voidptr(0), &bytes_avail, voidptr(0)) { return '', 0 } if bytes_avail == 0 { return '', 0 } mut bytes_read := int(0) buf := []u8{len: bytes_avail + 300} unsafe { C.ReadFile(rhandle, &buf[0], buf.cap, voidptr(&bytes_read), 0) } return buf[..bytes_read].bytestr(), bytes_read } fn (mut p Process) win_slurp(idx int) string { mut wdata := &WProcess(p.wdata) if unsafe { wdata == 0 } { return '' } mut rhandle := &u32(0) if idx == 1 { rhandle = wdata.child_stdout_read } if idx == 2 { rhandle = wdata.child_stderr_read } if rhandle == 0 { return '' } mut bytes_read := u32(0) buf := [4096]u8{} mut read_data := strings.new_builder(1024) for { mut result := false unsafe { result = C.ReadFile(rhandle, &buf[0], 1000, voidptr(&bytes_read), 0) read_data.write_ptr(&buf[0], int(bytes_read)) } if result == false || int(bytes_read) == 0 { break } } soutput := read_data.str() unsafe { read_data.free() } if idx == 1 { close_valid_handle(&wdata.child_stdout_read) } if idx == 2 { close_valid_handle(&wdata.child_stderr_read) } return soutput } // // these are here to make v_win.c/v.c generation work in all cases: fn (mut p Process) unix_spawn_process() int { return 0 } fn (mut p Process) unix_stop_process() { } fn (mut p Process) unix_resume_process() { } fn (mut p Process) unix_kill_process() { } fn (mut p Process) unix_kill_pgroup() { } fn (mut p Process) unix_wait() { } fn (mut p Process) unix_is_alive() bool { return false }