40f92a9da4
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@595 42af7a65-404d-4744-a932-0658087f49c3
153 lines
4.9 KiB
C
153 lines
4.9 KiB
C
/****************************************************************************
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* unistd.h
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*
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* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __UNISTD_H
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#define __UNISTD_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#include <nuttx/compiler.h>
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/* The number of functions that may be registerd to be called
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* at program exit.
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*/
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#define ATEXIT_MAX 1
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/* Values for seeking */
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#define SEEK_SET 0 /* From the start of the file */
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#define SEEK_CUR 1 /* From the current file offset */
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#define SEEK_END 2 /* From the end of the file */
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/* Bit values for the second argument to access */
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#define F_OK 0 /* Test existence */
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#define R_OK 1 /* Test read permission */
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#define W_OK 2 /* Test write permission */
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#define X_OK 4 /* Test execute permission */
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/* POSIX feature set macros */
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#define POSIX_VERSION
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#undef _POSIX_SAVED_IDS
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#undef _POSIX_JOB_CONTROL
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#define _POSIX_REALTIME_SIGNALS 1
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#define _POSIX_MESSAGE_PASSING 1
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#undef _POSIX_MAPPED_FILES
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#undef _POSIX_SHARED_MEMORY_OBJECTS
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#define _POSIX_PRIORITY_SCHEDULING 1
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#define _POSIX_TIMERS
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#undef _POSIX_MEMLOCK
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#undef _POSIX_MEMLOCK_RANGE
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#undef _POSIX_FSYNC
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#define _POSIX_SYNCHRONIZED_IO
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#undef _POSIX_ASYNCHRONOUS_IO
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#undef _POSIX_PRIORITIZED_IO
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/* Execution time constants (not supported) */
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#undef _POSIX_CHOWN_RESTRICTED
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#undef _POSIX_NO_TRUNC
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#undef _POSIX_VDISABLE
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#define _POSIX_SYNC_IO
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#undef _POSIX_ASYNC_IO
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#undef _POSIX_PRIO_IO
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#define fdatasync(f) fsync(f)
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/****************************************************************************
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* Global Variables
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/* Used by getopt (obviously NOT thread safe!) */
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EXTERN FAR char *optarg; /* Optional argument following option */
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EXTERN int optind; /* Index into argv */
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EXTERN int optopt; /* unrecognized option character */
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/****************************************************************************
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* Global Function Prototypes
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****************************************************************************/
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/* Task Control Interfaces */
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EXTERN pid_t getpid(void);
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EXTERN void _exit(int status) noreturn_function;
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EXTERN unsigned int sleep(unsigned int seconds);
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EXTERN void usleep(unsigned long usec);
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/* File descriptor operations */
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EXTERN int close(int fd);
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EXTERN int dup(int fd);
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EXTERN int dup2(int fd1, int fd2);
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EXTERN int fsync(int fd);
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EXTERN off_t lseek(int fd, off_t offset, int whence);
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EXTERN int read(int fd, FAR void *buf, unsigned int nbytes);
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EXTERN int write(int fd, FAR const void *buf, unsigned int nbytes);
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/* File path operations */
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EXTERN int unlink(FAR const char *pathname);
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EXTERN int rmdir(FAR const char *pathname);
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/* Other */
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EXTERN int getopt(int argc, FAR char *const argv[], FAR const char *optstring);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __UNISTD_H */
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