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/************************************************************
* unistd.h
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name Gregory Nutt nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************/
#ifndef __UNISTD_H
#define __UNISTD_H
/************************************************************
* Included Files
************************************************************/
#include <sys/types.h>
#include <nuttx/compiler.h>
/************************************************************
* Definitions
************************************************************/
/* The number of functions that may be registerd to be called
* at program exit.
*/
#define ATEXIT_MAX 1
/* Values for seeking */
#define SEEK_SET 0 /* From the start of the file */
#define SEEK_CUR 1 /* From the current file offset */
#define SEEK_END 2 /* From the end of the file */
/* Bit values for the second argument to access */
#define F_OK 0 /* Test existence */
#define R_OK 1 /* Test read permission */
#define W_OK 2 /* Test write permission */
#define X_OK 4 /* Test execute permission */
/* POSIX feature set macros */
#define POSIX_VERSION
#undef _POSIX_SAVED_IDS
#undef _POSIX_JOB_CONTROL
#define _POSIX_REALTIME_SIGNALS 1
#define _POSIX_MESSAGE_PASSING 1
#undef _POSIX_MAPPED_FILES
#undef _POSIX_SHARED_MEMORY_OBJECTS
#define _POSIX_PRIORITY_SCHEDULING 1
#define _POSIX_TIMERS
#undef _POSIX_MEMLOCK
#undef _POSIX_MEMLOCK_RANGE
#undef _POSIX_FSYNC
#define _POSIX_SYNCHRONIZED_IO
#undef _POSIX_ASYNCHRONOUS_IO
#undef _POSIX_PRIORITIZED_IO
/* Execution time constants (not supported) */
#undef _POSIX_CHOWN_RESTRICTED
#undef _POSIX_NO_TRUNC
#undef _POSIX_VDISABLE
#define _POSIX_SYNC_IO
#undef _POSIX_ASYNC_IO
#undef _POSIX_PRIO_IO
#define fsync(f)
/************************************************************
* Global Function Prototypes
************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/* Task Control Interfaces (based on ANSII APIs) */
EXTERN pid_t getpid(void);
EXTERN void _exit(int status) noreturn_function;
EXTERN unsigned int sleep(unsigned int seconds);
EXTERN void usleep(unsigned long usec);
/* File descriptor operations */
EXTERN int close(int fd);
EXTERN int dup(int fildes);
EXTERN int dup2(int fildes1, int fildes2);
EXTERN off_t lseek(int fd, off_t offset, int whence);
EXTERN int read(int fd, void *buf, unsigned int nbytes);
EXTERN int unlink(const char *path);
EXTERN int write(int fd, const void *buf, unsigned int nbytes);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __UNISTD_H */
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