Struct pathrs::OpenFlags

pub struct OpenFlags(pub c_int);

Wrapper for the underlying libc's O_* flags.

The flag values and their meaning is identical to the description in the open(2) man page.

Caveats

For historical reasons, the first three bits of open(2)'s flags are for the access mode and are actually treated as a 2-bit number. So, it is incorrect to attempt to do any checks on the access mode without masking it correctly. So some helpers were added to make usage more ergonomic.

Methods

impl OpenFlags

pub fn access_mode(self) -> c_int

Grab the access mode bits from the flags.

pub fn wants_read(self) -> bool

Does the access mode imply read access?

pub fn wants_write(self) -> bool

Does the access mode imply write access? Note that there are several other bits (such as O_TRUNC) which imply write access but are not part of the access mode, and thus a false value from .wants_write() does not guarantee that the kernel will not do a MAY_WRITE check.

Trait Implementations

impl Clone for OpenFlags

fn clone(&self) -> OpenFlags

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for OpenFlags

impl Debug for OpenFlags

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Eq for OpenFlags

impl From<i32> for OpenFlags

fn from(flags: c_int) -> Self

Performs the conversion.

impl PartialEq<OpenFlags> for OpenFlags

fn eq(&self, other: &OpenFlags) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &OpenFlags) -> bool

This method tests for !=.

impl StructuralEq for OpenFlags

impl StructuralPartialEq for OpenFlags