Crate extattr

Expand description

extattr

Yet another Extended Attributes library for Rust.

Why another crate for EA? Any difference from `xattr`?

Extended Attributes syscalls vary across implementations, for example, to set an EA:

// Linux
int setxattr(const char *path, const char *name, const void *value,
size_t size, int flags);

// FreeBSD
ssize_t extattr_set_file(const char *path, int attrnamespace,
const char *attrname, const void *data, size_t nbytes);

// macOS
int setxattr(const char *path, const char *name, void *value, size_t size,
u_int32_t position, int options);

xattr erases differences in those APIs and provides a consistent, rusty interface.

// A consistent API that would work on every OS
pub fn set<N, P>(path: P, name: N, value: &[u8]) -> Result<()>

extattr aims to provide bindings close to the native one.

// Linux
pub fn setxattr<P, S, B>(
    path: P,
    name: S,
    value: B,
    flags: Flags,
) -> Result<()>

// FreeBSD
pub fn extattr_set_file<P, S, B>(
    path: P,
    attrnamespace: AttrNamespace,
    attrname: S,
    data: B
) -> Result<()>

// macOS
pub fn setxattr<P, S, B>(
    path: P,
    name: S,
    value: B,
    position: u32,
    options: Options
) -> Result<()>

In most cases, you would like to use xattr instead of extattr. However, if you are on Linux and want to use that extra flags argument, or you are on macOS and want to use the arguments position and options, then extattr probably is a good choice:)

Structs

Options

options argument

Functions

fgetxattr

Retrieves the value of the extended attribute identified by name and associated with the file specified by the open file descriptor fd in the filesystem.

flistxattr

Retrieves the list of extended attribute names associated with the file specified by the open file descriptor fd in the filesystem.

fremovexattr

Removes the extended attribute identified by name and associated with the file specified by the open file descriptor fd.

fsetxattr

Sets the value of the extended attribute identified by name and associated with the file specified by the open file descriptor fd.

getxattr

Retrieves the value of the extended attribute identified by name and associated with the given path in the filesystem.

listxattr

Retrieves the list of extended attribute names associated with the given path in the filesystem.

removexattr

Removes the extended attribute identified by name and associated with the given path in the filesystem.

setxattr

Sets the value of the extended attribute identified by name and associated with the given path in the filesystem.

Type Definitions

Result