rt-thread-official/components/libc/compilers/common/extension/sys/unistd.h

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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
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* 2020-12-16 Meco Man add usleep
* 2021-09-11 Meco Man move functions from dfs_posix.h to unistd.h
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*/
#ifndef __SYS_UNISTD_H__
#define __SYS_UNISTD_H__
#include <stddef.h>
#include "types.h" /* <sys/types.h> */
#define STDIN_FILENO 0 /* standard input file descriptor */
#define STDOUT_FILENO 1 /* standard output file descriptor */
#define STDERR_FILENO 2 /* standard error file descriptor */
unsigned alarm(unsigned __secs);
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ssize_t read(int fd, void *buf, size_t len);
ssize_t write(int fd, const void *buf, size_t len);
off_t lseek(int fd, off_t offset, int whence);
int pause(void);
int fsync(int fildes);
long sysconf(int __name);
int unlink(const char *pathname);
int close(int d);
int ftruncate(int fd, off_t length);
int rmdir(const char *path);
int chdir(const char *path);
char *getcwd(char *buf, size_t size);
int access(const char *path, int amode);
int pipe(int fildes[2]);
int isatty(int fd);
char *ttyname(int desc);
unsigned int sleep(unsigned int seconds);
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int usleep(useconds_t usec);
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pid_t gettid(void);
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pid_t getpid(void);
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pid_t getppid(void);
uid_t getuid(void);
uid_t geteuid(void);
gid_t getgid(void);
gid_t getegid(void);
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#endif /* _SYS_UNISTD_H */