Arc::FileAccess Class Reference

Defines interface for accessing filesystems. More...

#include <FileAccess.h>

Data Structures
struct	header_t
Public Member Functions
bool	ping (void)
bool	setuid (int uid, int gid)
bool	mkdir (const std::string &path, mode_t mode)
bool	mkdirp (const std::string &path, mode_t mode)
bool	link (const std::string &oldpath, const std::string &newpath)
bool	softlink (const std::string &oldpath, const std::string &newpath)
bool	copy (const std::string &oldpath, const std::string &newpath, mode_t mode)
bool	chmod (const std::string &path, mode_t mode)
bool	stat (const std::string &path, struct stat &st)
bool	lstat (const std::string &path, struct stat &st)
bool	fstat (struct stat &st)
bool	ftruncate (off_t length)
off_t	fallocate (off_t length)
bool	readlink (const std::string &path, std::string &linkpath)
bool	remove (const std::string &path)
bool	unlink (const std::string &path)
bool	rmdir (const std::string &path)
bool	rmdirr (const std::string &path)
bool	opendir (const std::string &path)
bool	closedir (void)
bool	readdir (std::string &name)
bool	open (const std::string &path, int flags, mode_t mode)
bool	close (void)
bool	mkstemp (std::string &path, mode_t mode)
off_t	lseek (off_t offset, int whence)
ssize_t	read (void *buf, size_t size)
ssize_t	write (const void *buf, size_t size)
ssize_t	pread (void *buf, size_t size, off_t offset)
ssize_t	pwrite (const void *buf, size_t size, off_t offset)
int	geterrno ()
	operator bool (void)
bool	operator! (void)
Static Public Member Functions
static void	testtune (void)

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Detailed Description

Defines interface for accessing filesystems.

This class accesses local filesystem through proxy executable which allows to switch user id in multithreaded systems without introducing conflict with other threads. Its methods are mostly replicas of corresponding POSIX functions with some convenience tweaking.

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Member Function Documentation

bool Arc::FileAccess::copy	(	const std::string &	oldpath,
		const std::string &	newpath,
		mode_t	mode
	)

Copy file to new location. If new file is created it is assigned secified mode.

int Arc::FileAccess::geterrno

(

)

[inline]

Get errno of last operation. Every operation resets errno.

bool Arc::FileAccess::mkdirp	(	const std::string &	path,
		mode_t	mode
	)

Make a directory and assign it specified mode. If missing all intermediate directories are created too.

bool Arc::FileAccess::mkstemp	(	std::string &	path,
		mode_t	mode
	)

Open new temporary file for writing. On input path contains template of file name ending with XXXXXX. On output path is path to created file.

bool Arc::FileAccess::open	(	const std::string &	path,
		int	flags,
		mode_t	mode
	)

Open file. Only one file may be open at a time.

bool Arc::FileAccess::opendir

(

const std::string &

path

)

Open directory. Only one directory may be open at a time.

bool Arc::FileAccess::setuid	(	int	uid,
		int	gid
	)

Modify user uid and gid. If any is set to 0 then executable is switched to original uid/gid.

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The documentation for this class was generated from the following file:

• FileAccess.h