kvtree_io.h File Reference

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Functions
mode_t	kvtree_getmode (int read, int write, int execute)
int	kvtree_open (const char *file, int flags,...)
int	kvtree_close (const char *file, int fd)
int	kvtree_file_lock_write (const char *file, int fd)
int	kvtree_file_unlock (const char *file, int fd)
int	kvtree_open_with_lock (const char *file, int flags, mode_t mode, int write)
int	kvtree_close_with_unlock (const char *file, int fd)
int	kvtree_lseek (const char *file, int fd, off_t pos, int whence)
ssize_t	kvtree_read_attempt (const char *file, int fd, void *buf, size_t size)
ssize_t	kvtree_write_attempt (const char *file, int fd, const void *buf, size_t size)
int	kvtree_file_is_readable (const char *file)

Function Documentation

kvtree_close()

int kvtree_close	(	const char *	file,
		int	fd
	)

close file with an fsync

kvtree_close_with_unlock()

int kvtree_close_with_unlock	(	const char *	file,
		int	fd
	)

unlocks the specified file descriptor and then closes the file

kvtree_file_is_readable()

int kvtree_file_is_readable

(

const char *

file

)

tests whether the file or directory is readable

kvtree_file_lock_write()

int kvtree_file_lock_write	(	const char *	file,
		int	fd
	)

get and release file locks

kvtree_file_unlock()

int kvtree_file_unlock	(	const char *	file,
		int	fd
	)

kvtree_getmode()

mode_t kvtree_getmode	(	int	read,
		int	write,
		int	execute
	)

returns user's current mode as determine by their umask

kvtree_lseek()

int kvtree_lseek	(	const char *	file,
		int	fd,
		off_t	pos,
		int	whence
	)

seek file descriptor to specified position

kvtree_open()

int kvtree_open	(	const char *	file,
		int	flags,
			...
	)

open file with specified flags and mode, retry open a few times on failure

kvtree_open_with_lock()

int kvtree_open_with_lock	(	const char *	file,
		int	flags,
		mode_t	mode,
		int	write
	)

opens specified file and waits for a shared lock if write=0 or an exclusive lock if write=1 before returning the file descriptor

kvtree_read_attempt()

ssize_t kvtree_read_attempt	(	const char *	file,
		int	fd,
		void *	buf,
		size_t	size
	)

make a good attempt to read from file (retries, if necessary, return error if fail)

kvtree_write_attempt()

ssize_t kvtree_write_attempt	(	const char *	file,
		int	fd,
		const void *	buf,
		size_t	size
	)

make a good attempt to write to file (retries, if necessary, return error if fail)