update esppilight lib
content of the library is not filtered on 433mhz only
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Florian committed
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@@ -0,0 +1,511 @@
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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <assert.h>
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#include <io.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "uv.h"
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#include "internal.h"
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#include "handle-inl.h"
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/*
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* The `child_stdio_buffer` buffer has the following layout:
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* int number_of_fds
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* unsigned char crt_flags[number_of_fds]
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* HANDLE os_handle[number_of_fds]
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*/
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#define CHILD_STDIO_SIZE(count) \
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(sizeof(int) + \
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sizeof(unsigned char) * (count) + \
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sizeof(uintptr_t) * (count))
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#define CHILD_STDIO_COUNT(buffer) \
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*((unsigned int*) (buffer))
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#define CHILD_STDIO_CRT_FLAGS(buffer, fd) \
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*((unsigned char*) (buffer) + sizeof(int) + fd)
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#define CHILD_STDIO_HANDLE(buffer, fd) \
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*((HANDLE*) ((unsigned char*) (buffer) + \
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sizeof(int) + \
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sizeof(unsigned char) * \
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CHILD_STDIO_COUNT((buffer)) + \
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sizeof(HANDLE) * (fd)))
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/* CRT file descriptor mode flags */
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#define FOPEN 0x01
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#define FEOFLAG 0x02
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#define FCRLF 0x04
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#define FPIPE 0x08
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#define FNOINHERIT 0x10
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#define FAPPEND 0x20
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#define FDEV 0x40
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#define FTEXT 0x80
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/*
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* Clear the HANDLE_FLAG_INHERIT flag from all HANDLEs that were inherited
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* the parent process. Don't check for errors - the stdio handles may not be
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* valid, or may be closed already. There is no guarantee that this function
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* does a perfect job.
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*/
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void uv_disable_stdio_inheritance(void) {
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HANDLE handle;
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STARTUPINFOW si;
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/* Make the windows stdio handles non-inheritable. */
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handle = GetStdHandle(STD_INPUT_HANDLE);
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if (handle != NULL && handle != INVALID_HANDLE_VALUE)
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SetHandleInformation(handle, HANDLE_FLAG_INHERIT, 0);
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handle = GetStdHandle(STD_OUTPUT_HANDLE);
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if (handle != NULL && handle != INVALID_HANDLE_VALUE)
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SetHandleInformation(handle, HANDLE_FLAG_INHERIT, 0);
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handle = GetStdHandle(STD_ERROR_HANDLE);
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if (handle != NULL && handle != INVALID_HANDLE_VALUE)
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SetHandleInformation(handle, HANDLE_FLAG_INHERIT, 0);
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/* Make inherited CRT FDs non-inheritable. */
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GetStartupInfoW(&si);
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if (uv__stdio_verify(si.lpReserved2, si.cbReserved2))
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uv__stdio_noinherit(si.lpReserved2);
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}
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static int uv__create_stdio_pipe_pair(uv_loop_t* loop,
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uv_pipe_t* server_pipe, HANDLE* child_pipe_ptr, unsigned int flags) {
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char pipe_name[64];
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SECURITY_ATTRIBUTES sa;
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DWORD server_access = 0;
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DWORD client_access = 0;
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HANDLE child_pipe = INVALID_HANDLE_VALUE;
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int err;
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if (flags & UV_READABLE_PIPE) {
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/* The server needs inbound access too, otherwise CreateNamedPipe() */
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/* won't give us the FILE_READ_ATTRIBUTES permission. We need that to */
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/* probe the state of the write buffer when we're trying to shutdown */
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/* the pipe. */
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server_access |= PIPE_ACCESS_OUTBOUND | PIPE_ACCESS_INBOUND;
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client_access |= GENERIC_READ | FILE_WRITE_ATTRIBUTES;
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}
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if (flags & UV_WRITABLE_PIPE) {
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server_access |= PIPE_ACCESS_INBOUND;
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client_access |= GENERIC_WRITE | FILE_READ_ATTRIBUTES;
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}
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/* Create server pipe handle. */
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err = uv_stdio_pipe_server(loop,
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server_pipe,
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server_access,
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pipe_name,
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sizeof(pipe_name));
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if (err)
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goto error;
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/* Create child pipe handle. */
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sa.nLength = sizeof sa;
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sa.lpSecurityDescriptor = NULL;
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sa.bInheritHandle = TRUE;
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child_pipe = CreateFileA(pipe_name,
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client_access,
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0,
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&sa,
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OPEN_EXISTING,
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server_pipe->ipc ? FILE_FLAG_OVERLAPPED : 0,
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NULL);
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if (child_pipe == INVALID_HANDLE_VALUE) {
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err = GetLastError();
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goto error;
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}
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#ifndef NDEBUG
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/* Validate that the pipe was opened in the right mode. */
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{
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DWORD mode;
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BOOL r = GetNamedPipeHandleState(child_pipe,
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&mode,
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NULL,
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NULL,
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NULL,
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NULL,
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0);
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assert(r == TRUE);
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assert(mode == (PIPE_READMODE_BYTE | PIPE_WAIT));
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}
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#endif
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/* Do a blocking ConnectNamedPipe. This should not block because we have */
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/* both ends of the pipe created. */
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if (!ConnectNamedPipe(server_pipe->handle, NULL)) {
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if (GetLastError() != ERROR_PIPE_CONNECTED) {
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err = GetLastError();
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goto error;
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}
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}
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/* The server end is now readable and/or writable. */
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if (flags & UV_READABLE_PIPE)
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server_pipe->flags |= UV_HANDLE_WRITABLE;
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if (flags & UV_WRITABLE_PIPE)
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server_pipe->flags |= UV_HANDLE_READABLE;
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*child_pipe_ptr = child_pipe;
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return 0;
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error:
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if (server_pipe->handle != INVALID_HANDLE_VALUE) {
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uv_pipe_cleanup(loop, server_pipe);
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}
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if (child_pipe != INVALID_HANDLE_VALUE) {
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CloseHandle(child_pipe);
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}
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return err;
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}
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static int uv__duplicate_handle(uv_loop_t* loop, HANDLE handle, HANDLE* dup) {
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HANDLE current_process;
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/* _get_osfhandle will sometimes return -2 in case of an error. This seems */
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/* to happen when fd <= 2 and the process' corresponding stdio handle is */
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/* set to NULL. Unfortunately DuplicateHandle will happily duplicate */
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/* (HANDLE) -2, so this situation goes unnoticed until someone tries to */
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/* use the duplicate. Therefore we filter out known-invalid handles here. */
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if (handle == INVALID_HANDLE_VALUE ||
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handle == NULL ||
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handle == (HANDLE) -2) {
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*dup = INVALID_HANDLE_VALUE;
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return ERROR_INVALID_HANDLE;
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}
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current_process = GetCurrentProcess();
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if (!DuplicateHandle(current_process,
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handle,
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current_process,
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dup,
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0,
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TRUE,
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DUPLICATE_SAME_ACCESS)) {
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*dup = INVALID_HANDLE_VALUE;
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return GetLastError();
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}
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return 0;
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}
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static int uv__duplicate_fd(uv_loop_t* loop, int fd, HANDLE* dup) {
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HANDLE handle;
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if (fd == -1) {
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*dup = INVALID_HANDLE_VALUE;
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return ERROR_INVALID_HANDLE;
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}
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handle = uv__get_osfhandle(fd);
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return uv__duplicate_handle(loop, handle, dup);
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}
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int uv__create_nul_handle(HANDLE* handle_ptr,
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DWORD access) {
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HANDLE handle;
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SECURITY_ATTRIBUTES sa;
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sa.nLength = sizeof sa;
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sa.lpSecurityDescriptor = NULL;
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sa.bInheritHandle = TRUE;
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handle = CreateFileW(L"NUL",
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access,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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&sa,
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OPEN_EXISTING,
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0,
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NULL);
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if (handle == INVALID_HANDLE_VALUE) {
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return GetLastError();
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}
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*handle_ptr = handle;
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return 0;
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}
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int uv__stdio_create(uv_loop_t* loop,
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const uv_process_options_t* options,
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BYTE** buffer_ptr) {
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BYTE* buffer;
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int count, i;
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int err;
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count = options->stdio_count;
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if (count < 0 || count > 255) {
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/* Only support FDs 0-255 */
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return ERROR_NOT_SUPPORTED;
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} else if (count < 3) {
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/* There should always be at least 3 stdio handles. */
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count = 3;
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}
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/* Allocate the child stdio buffer */
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buffer = (BYTE*) uv__malloc(CHILD_STDIO_SIZE(count));
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if (buffer == NULL) {
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return ERROR_OUTOFMEMORY;
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}
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/* Prepopulate the buffer with INVALID_HANDLE_VALUE handles so we can */
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/* clean up on failure. */
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CHILD_STDIO_COUNT(buffer) = count;
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for (i = 0; i < count; i++) {
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CHILD_STDIO_CRT_FLAGS(buffer, i) = 0;
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CHILD_STDIO_HANDLE(buffer, i) = INVALID_HANDLE_VALUE;
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}
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for (i = 0; i < count; i++) {
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uv_stdio_container_t fdopt;
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if (i < options->stdio_count) {
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fdopt = options->stdio[i];
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} else {
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fdopt.flags = UV_IGNORE;
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}
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switch (fdopt.flags & (UV_IGNORE | UV_CREATE_PIPE | UV_INHERIT_FD |
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UV_INHERIT_STREAM)) {
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case UV_IGNORE:
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/* Starting a process with no stdin/stout/stderr can confuse it. */
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/* So no matter what the user specified, we make sure the first */
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/* three FDs are always open in their typical modes, e.g. stdin */
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/* be readable and stdout/err should be writable. For FDs > 2, don't */
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/* do anything - all handles in the stdio buffer are initialized with */
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/* INVALID_HANDLE_VALUE, which should be okay. */
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if (i <= 2) {
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DWORD access = (i == 0) ? FILE_GENERIC_READ :
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FILE_GENERIC_WRITE | FILE_READ_ATTRIBUTES;
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err = uv__create_nul_handle(&CHILD_STDIO_HANDLE(buffer, i),
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access);
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if (err)
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goto error;
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CHILD_STDIO_CRT_FLAGS(buffer, i) = FOPEN | FDEV;
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}
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break;
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case UV_CREATE_PIPE: {
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/* Create a pair of two connected pipe ends; one end is turned into */
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/* an uv_pipe_t for use by the parent. The other one is given to */
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/* the child. */
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uv_pipe_t* parent_pipe = (uv_pipe_t*) fdopt.data.stream;
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HANDLE child_pipe = INVALID_HANDLE_VALUE;
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||||
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||||
/* Create a new, connected pipe pair. stdio[i].stream should point */
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/* to an uninitialized, but not connected pipe handle. */
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assert(fdopt.data.stream->type == UV_NAMED_PIPE);
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assert(!(fdopt.data.stream->flags & UV_HANDLE_CONNECTION));
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assert(!(fdopt.data.stream->flags & UV_HANDLE_PIPESERVER));
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||||
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||||
err = uv__create_stdio_pipe_pair(loop,
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parent_pipe,
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||||
&child_pipe,
|
||||
fdopt.flags);
|
||||
if (err)
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goto error;
|
||||
|
||||
CHILD_STDIO_HANDLE(buffer, i) = child_pipe;
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||||
CHILD_STDIO_CRT_FLAGS(buffer, i) = FOPEN | FPIPE;
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||||
break;
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||||
}
|
||||
|
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case UV_INHERIT_FD: {
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||||
/* Inherit a raw FD. */
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HANDLE child_handle;
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||||
|
||||
/* Make an inheritable duplicate of the handle. */
|
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err = uv__duplicate_fd(loop, fdopt.data.fd, &child_handle);
|
||||
if (err) {
|
||||
/* If fdopt.data.fd is not valid and fd fd <= 2, then ignore the */
|
||||
/* error. */
|
||||
if (fdopt.data.fd <= 2 && err == ERROR_INVALID_HANDLE) {
|
||||
CHILD_STDIO_CRT_FLAGS(buffer, i) = 0;
|
||||
CHILD_STDIO_HANDLE(buffer, i) = INVALID_HANDLE_VALUE;
|
||||
break;
|
||||
}
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* Figure out what the type is. */
|
||||
switch (GetFileType(child_handle)) {
|
||||
case FILE_TYPE_DISK:
|
||||
CHILD_STDIO_CRT_FLAGS(buffer, i) = FOPEN;
|
||||
break;
|
||||
|
||||
case FILE_TYPE_PIPE:
|
||||
CHILD_STDIO_CRT_FLAGS(buffer, i) = FOPEN | FPIPE;
|
||||
break;
|
||||
|
||||
case FILE_TYPE_CHAR:
|
||||
case FILE_TYPE_REMOTE:
|
||||
CHILD_STDIO_CRT_FLAGS(buffer, i) = FOPEN | FDEV;
|
||||
break;
|
||||
|
||||
case FILE_TYPE_UNKNOWN:
|
||||
if (GetLastError() != 0) {
|
||||
err = GetLastError();
|
||||
CloseHandle(child_handle);
|
||||
goto error;
|
||||
}
|
||||
CHILD_STDIO_CRT_FLAGS(buffer, i) = FOPEN | FDEV;
|
||||
break;
|
||||
|
||||
default:
|
||||
assert(0);
|
||||
return -1;
|
||||
}
|
||||
|
||||
CHILD_STDIO_HANDLE(buffer, i) = child_handle;
|
||||
break;
|
||||
}
|
||||
|
||||
case UV_INHERIT_STREAM: {
|
||||
/* Use an existing stream as the stdio handle for the child. */
|
||||
HANDLE stream_handle, child_handle;
|
||||
unsigned char crt_flags;
|
||||
uv_stream_t* stream = fdopt.data.stream;
|
||||
|
||||
/* Leech the handle out of the stream. */
|
||||
if (stream->type == UV_TTY) {
|
||||
stream_handle = ((uv_tty_t*) stream)->handle;
|
||||
crt_flags = FOPEN | FDEV;
|
||||
} else if (stream->type == UV_NAMED_PIPE &&
|
||||
stream->flags & UV_HANDLE_CONNECTION) {
|
||||
stream_handle = ((uv_pipe_t*) stream)->handle;
|
||||
crt_flags = FOPEN | FPIPE;
|
||||
} else {
|
||||
stream_handle = INVALID_HANDLE_VALUE;
|
||||
crt_flags = 0;
|
||||
}
|
||||
|
||||
if (stream_handle == NULL ||
|
||||
stream_handle == INVALID_HANDLE_VALUE) {
|
||||
/* The handle is already closed, or not yet created, or the */
|
||||
/* stream type is not supported. */
|
||||
err = ERROR_NOT_SUPPORTED;
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* Make an inheritable copy of the handle. */
|
||||
err = uv__duplicate_handle(loop, stream_handle, &child_handle);
|
||||
if (err)
|
||||
goto error;
|
||||
|
||||
CHILD_STDIO_HANDLE(buffer, i) = child_handle;
|
||||
CHILD_STDIO_CRT_FLAGS(buffer, i) = crt_flags;
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
assert(0);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
*buffer_ptr = buffer;
|
||||
return 0;
|
||||
|
||||
error:
|
||||
uv__stdio_destroy(buffer);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
void uv__stdio_destroy(BYTE* buffer) {
|
||||
int i, count;
|
||||
|
||||
count = CHILD_STDIO_COUNT(buffer);
|
||||
for (i = 0; i < count; i++) {
|
||||
HANDLE handle = CHILD_STDIO_HANDLE(buffer, i);
|
||||
if (handle != INVALID_HANDLE_VALUE) {
|
||||
CloseHandle(handle);
|
||||
}
|
||||
}
|
||||
|
||||
uv__free(buffer);
|
||||
}
|
||||
|
||||
|
||||
void uv__stdio_noinherit(BYTE* buffer) {
|
||||
int i, count;
|
||||
|
||||
count = CHILD_STDIO_COUNT(buffer);
|
||||
for (i = 0; i < count; i++) {
|
||||
HANDLE handle = CHILD_STDIO_HANDLE(buffer, i);
|
||||
if (handle != INVALID_HANDLE_VALUE) {
|
||||
SetHandleInformation(handle, HANDLE_FLAG_INHERIT, 0);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
int uv__stdio_verify(BYTE* buffer, WORD size) {
|
||||
unsigned int count;
|
||||
|
||||
/* Check the buffer pointer. */
|
||||
if (buffer == NULL)
|
||||
return 0;
|
||||
|
||||
/* Verify that the buffer is at least big enough to hold the count. */
|
||||
if (size < CHILD_STDIO_SIZE(0))
|
||||
return 0;
|
||||
|
||||
/* Verify if the count is within range. */
|
||||
count = CHILD_STDIO_COUNT(buffer);
|
||||
if (count > 256)
|
||||
return 0;
|
||||
|
||||
/* Verify that the buffer size is big enough to hold info for N FDs. */
|
||||
if (size < CHILD_STDIO_SIZE(count))
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
WORD uv__stdio_size(BYTE* buffer) {
|
||||
return (WORD) CHILD_STDIO_SIZE(CHILD_STDIO_COUNT((buffer)));
|
||||
}
|
||||
|
||||
|
||||
HANDLE uv__stdio_handle(BYTE* buffer, int fd) {
|
||||
return CHILD_STDIO_HANDLE(buffer, fd);
|
||||
}
|
||||
Reference in new issue
Block a user