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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2015-2017. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*
* This file defines the interface between erts and child_setup.
*/
#ifndef _ERL_UNIX_FORKER_H
#define _ERL_UNIX_FORKER_H
#include "sys.h"
#ifdef __FreeBSD__
/* The freebsd sendmsg man page explicitly states that
you should not close fds before they are known
to have reached the other side, so this Ack protects
against that. */
#define FORKER_PROTO_START_ACK 1
#endif
#define FORKER_ARGV_NO_OF_ARGS 3
#define FORKER_ARGV_PROGNAME_IX 0 /* Program name */
#define FORKER_ARGV_MAX_FILES 1 /* max_files */
#define FORKER_FLAG_USE_STDIO (1 << 0) /* dup the pipe to stdin/stderr */
#define FORKER_FLAG_EXIT_STATUS (1 << 1) /* send the exit status to parent */
#define FORKER_FLAG_DO_READ (1 << 2) /* dup write fd */
#define FORKER_FLAG_DO_WRITE (1 << 3) /* dup read fd */
#if SIZEOF_VOID_P == SIZEOF_LONG
typedef unsigned long ErtsSysPortId;
#elif SIZEOF_VOID_P == SIZEOF_INT
typedef unsigned int ErtsSysPortId;
#elif SIZEOF_VOID_P == SIZEOF_LONG_LONG
typedef unsigned long long ErtsSysPortId;
#endif
typedef struct ErtsSysForkerProto_ {
enum {
ErtsSysForkerProtoAction_Start,
ErtsSysForkerProtoAction_StartAck,
ErtsSysForkerProtoAction_Go,
ErtsSysForkerProtoAction_SigChld,
ErtsSysForkerProtoAction_Ack
} action;
union {
struct {
ErtsSysPortId port_id;
int fds[3];
} start;
struct {
pid_t os_pid;
int error_number;
} go;
struct {
ErtsSysPortId port_id;
int error_number;
} sigchld;
} u;
} ErtsSysForkerProto;
#endif /* #ifndef _ERL_UNIX_FORKER_H */
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