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/****************************************************************************
* include/unistd.h
*
* Copyright (C) 2007-2009, 2013-2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 NuttX 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 __INCLUDE_UNISTD_H
#define __INCLUDE_UNISTD_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/types.h>
#include <nuttx/compiler.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* The number of functions that may be registered 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 1
#undef _POSIX_MEMLOCK
#undef _POSIX_MEMLOCK_RANGE
#undef _POSIX_FSYNC
#define _POSIX_SYNCHRONIZED_IO 1
#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 1
#undef _POSIX_ASYNC_IO
#undef _POSIX_PRIO_IO
#define fdatasync(f) fsync(f)
/****************************************************************************
* Global Variables
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/* Used by getopt (obviously NOT thread safe!). These variables cannot be
* accessed directly by an external NXFLAT module. In that case, accessor
* functions must be used.
*/
#ifndef __NXFLAT__
EXTERN FAR char *optarg; /* Optional argument following option */
EXTERN int optind; /* Index into argv */
EXTERN int optopt; /* unrecognized option character */
#else
# define optarg (*(getoptargp()))
# define optind (*(getoptindp()))
# define optopt (*(getoptoptp()))
#endif
/****************************************************************************
* Global Function Prototypes
****************************************************************************/
/* Task Control Interfaces */
pid_t vfork(void);
pid_t getpid(void);
void _exit(int status) noreturn_function;
unsigned int sleep(unsigned int seconds);
int usleep(useconds_t usec);
int pause(void);
/* File descriptor operations */
int close(int fd);
int dup(int fd);
int dup2(int fd1, int fd2);
int fsync(int fd);
off_t lseek(int fd, off_t offset, int whence);
ssize_t read(int fd, FAR void *buf, size_t nbytes);
ssize_t write(int fd, FAR const void *buf, size_t nbytes);
ssize_t pread(int fd, FAR void *buf, size_t nbytes, off_t offset);
ssize_t pwrite(int fd, FAR const void *buf, size_t nbytes, off_t offset);
/* Memory management */
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_MM_PGALLOC) && \
defined(CONFIG_ARCH_USE_MMU)
FAR void *sbrk(intptr_t incr);
#endif
/* Special devices */
int pipe(int fd[2]);
/* Working directory operations */
int chdir(FAR const char *path);
FAR char *getcwd(FAR char *buf, size_t size);
/* File path operations */
int access(FAR const char *path, int amode);
int rmdir(FAR const char *pathname);
int unlink(FAR const char *pathname);
/* Execution of programs from files */
#ifdef CONFIG_LIBC_EXECFUNCS
int execl(FAR const char *path, ...);
int execv(FAR const char *path, FAR char *const argv[]);
#endif
/* Other */
int getopt(int argc, FAR char *const argv[], FAR const char *optstring);
/* Accessor functions intended for use only by external NXFLAT
* modules. The global variables optarg, optind, and optopt cannot
* be referenced directly from external modules.
*/
FAR char **getoptargp(void); /* Optional argument following option */
int *getoptindp(void); /* Index into argv */
int *getoptoptp(void); /* unrecognized option character */
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_UNISTD_H */
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