/*

 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#ifndef CHILDPROC_MD_H

#define CHILDPROC_MD_H

#include <sys/types.h>

#ifdef __APPLE__

#include <crt_externs.h>

#define environ (*_NSGetEnviron())

#else

/* This is one of the rare times it's more portable to declare an

 * external symbol explicitly, rather than via a system header.

 * The declaration is standardized as part of UNIX98, but there is

 * no standard (not even de-facto) header file where the

 * declaration is to be found.  See:

 * http://www.opengroup.org/onlinepubs/009695399/functions/environ.html

 * http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_02.html

 *

 * "All identifiers in this volume of IEEE Std 1003.1-2001, except

 * environ, are defined in at least one of the headers" (!)

 */

extern char **environ;

#endif

#ifdef __linux__

#include <sched.h>

#endif

#ifndef STDIN_FILENO

#define STDIN_FILENO 0

#endif

#ifndef STDOUT_FILENO

#define STDOUT_FILENO 1

#endif

#ifndef STDERR_FILENO

#define STDERR_FILENO 2

#endif

#ifndef SA_NOCLDSTOP

#define SA_NOCLDSTOP 0

#endif

#ifndef SA_RESTART

#define SA_RESTART 0

#endif

#define FAIL_FILENO (STDERR_FILENO + 1)

/* TODO: Refactor. */

#define RESTARTABLE(_cmd, _result) do { \

  do { \

    _result = _cmd; \

  } while((_result == -1) && (errno == EINTR)); \

} while(0)

/* These numbers must be the same as the Enum in ProcessImpl.java

 * Must be a better way of doing this.

 */

#define MODE_FORK 1

#define MODE_POSIX_SPAWN 2

#define MODE_VFORK 3

#define MODE_CLONE 4

typedef struct _ChildStuff

{

    int in[2];

    int out[2];

    int err[2];

    int fail[2];

    int childenv[2];

    int fds[3];

    int mode;

    const char **argv;

    int argc;

    const char **envv;

    const char *pdir;

    int redirectErrorStream;

} ChildStuff;

/* following used in addition when mode is SPAWN */

typedef struct _SpawnInfo {

    int nargv; /* number of argv array elements  */

    int argvBytes; /* total number of bytes in argv array */

    int nenvv; /* number of envv array elements  */

    int envvBytes; /* total number of bytes in envv array */

    int dirlen; /* length of home directory string */

    int nparentPathv; /* number of elements in parentPathv array */

    int parentPathvBytes; /* total number of bytes in parentPathv array */

} SpawnInfo;

/**

 * The cached and split version of the JDK's effective PATH.

 * (We don't support putenv("PATH=...") in native code)

 */

const char * const *parentPathv;

ssize_t restartableWrite(int fd, const void *buf, size_t count);

int restartableDup2(int fd_from, int fd_to);

int closeSafely(int fd);

int isAsciiDigit(char c);

int closeDescriptors(void);

int moveDescriptor(int fd_from, int fd_to);

int magicNumber();

ssize_t readFully(int fd, void *buf, size_t nbyte);

void initVectorFromBlock(const char**vector, const char* block, int count);

void execve_as_traditional_shell_script(const char *file,

                                        const char *argv[],

                                        const char *const envp[]);

void execve_with_shell_fallback(int mode, const char *file,

                                const char *argv[],

                                const char *const envp[]);

void JDK_execvpe(int mode, const char *file,

                 const char *argv[],

                 const char *const envp[]);

int childProcess(void *arg);

#endif