unistd.h File Reference

POSIX operating system APIs. More...

#include <sys/types.h>
#include <tinyara/compiler.h>

Include dependency graph for unistd.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Macros
#define	ATEXIT_MAX   1
#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 */
#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 */
#define	POSIX_VERSION
#define	_POSIX_REALTIME_SIGNALS   1
#define	_POSIX_MESSAGE_PASSING   1
#define	_POSIX_PRIORITY_SCHEDULING   1
#define	_POSIX_TIMERS   1
#define	_POSIX_SYNCHRONIZED_IO   1
#define	_POSIX_SYNC_IO   1
#define	fdatasync(f)   fsync(f)
#define	EXTERN   extern

Functions
pid_t	vfork (void)
	The vfork() function has the same effect as fork(), except that the behavior is undefined if the process created by vfork() either modifies any data other than a variable of type pid_t used to store the return value from vfork(), or returns from the function in which vfork() was called, or calls any other function before successfully calling _exit() or one of the exec family of functions. More...
pid_t	getpid (void)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
unsigned int	sleep (unsigned int seconds)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	usleep (useconds_t usec)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	pause (void)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	close (int fd)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	dup (int fd)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	dup2 (int fd1, int fd2)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	fsync (int fd)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
off_t	lseek (int fd, off_t offset, int whence)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
ssize_t	read (int fd, FAR void *buf, size_t nbytes)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
ssize_t	write (int fd, FAR const void *buf, size_t nbytes)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
ssize_t	pread (int fd, FAR void *buf, size_t nbytes, off_t offset)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
ssize_t	pwrite (int fd, FAR const void *buf, size_t nbytes, off_t offset)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	pipe (int fd[2])
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	chdir (FAR const char *path)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
FAR char *	getcwd (FAR char *buf, size_t size)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	rmdir (FAR const char *pathname)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	unlink (FAR const char *pathname)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...
int	getopt (int argc, FAR char *const argv[], FAR const char *optstring)
	POSIX APIs (refer to : http://pubs.opengroup.org/onlinepubs/9699919799/) More...

Variables
EXTERN FAR char *	optarg
EXTERN int	optind
EXTERN int	optopt

Detailed Description

POSIX operating system APIs.

Definition in file unistd.h.