unistd.h File Reference

Unistd header. More...

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Macros
#define	TEMP_FAILURE_RETRY(expression)
	Recall function if it was interrupted by signal. More...

Enumerations
enum	{   _SC_OPEN_MAX, _SC_PAGESIZE, _SC_PHYS_PAGES, _SC_AVPHYS_PAGES,   _SC_NPROCESSORS_CONF, _SC_NPROCESSORS_ONLN, _SC_THREADS, _SC_THREAD_KEYS_MAX,   _SC_THREAD_THREADS_MAX, _SC_THREAD_STACK_MIN }
	sysconf system resources' names. More...

Functions
void	_exit (int status)
	Terminate the calling process "immediately". Any open file descriptors belonging to the process are closed; process's parent is sent a SIGCHLD signal. More...
int	profil (unsigned short *buf, size_t bufsiz, size_t offset, unsigned int scale)
	Provide a means to find out in what areas your program spends most of its time. The argument buf points to bufsiz bytes of core. Every virtual 10 milliseconds, the user's program counter (PC) is examined: offset is subtracted and the result is multiplied by scale and divided by 65536. If the resulting value is less than bufsiz, then the corresponding entry in buf is incremented. If buf is NULL, profiling is disabled. More...
pid_t	getpid (void)
	Return the process ID of the calling process. More...
pid_t	gettid (void)
	Return the thread ID of the calling thread. More...
int	getcpu (void)
	Return the number of CPU on which current thread is performed. More...
int	getcluster (void)
	Return the cluster id on which current thread is performed. More...
int	rename (const char *pathname, const char *new_pathname)
	Rename file. More...
int	unlink (const char *pathname)
	Remove a link to a file. More...
int	ftruncate (int fd, int size)
	Cause file referenced by fd to be truncated to a size of precisely length bytes. More...
int	rmdir (char *dir_name)
	Remove a directory at file system. More...
int	close (int fd)
	Deallocate the file descriptor indicated by fd. To deallocate means to make the file descriptor available for return by subsequent calls to open() or other functions that allocate file descriptors. All outstanding record locks owned by the process on the file associated with the file descriptor shall be removed (that is, unlocked). More...
ssize_t	read (int fd, void *buf, size_t count)
	Attempt to read count bytes from the file associated with the open file descriptor, fd, into the buffer pointed to by buf. More...
ssize_t	write (int fd, const void *buf, size_t count)
	Attempt to write count bytes from buffer pointed to by buf to the file associated with the open file descriptor, fd. More...
int	fstat (int fd, struct stat *buf)
	Get status of a file with a descriptor fd. More...
int	stat (const char *pathname, struct stat *buf)
	Get status of a file pathname. More...
int	fsync (int fd)
	Synchronize a file's in-core state with storage device. More...
int	lseek (int fd, int offset, int whence)
	Reposition read/write file offset. More...
long	sysconf (int name)
	Get configuration information at run time. More...

Detailed Description

Unistd header.

Copyright

(C) 2012-2019, Samsung Electronics Co., Ltd.