pub trait OpenOptionsExt {
// Required methods
fn mode(&mut self, mode: u32) -> &mut Self;
fn custom_flags(&mut self, flags: i32) -> &mut Self;
}
Available on Unix only.
Expand description
Unix-specific extensions to fs::OpenOptions
.
Required Methods§
sourcefn mode(&mut self, mode: u32) -> &mut Self
fn mode(&mut self, mode: u32) -> &mut Self
Sets the mode bits that a new file will be created with.
If a new file is created as part of an OpenOptions::open
call then this
specified mode
will be used as the permission bits for the new file.
If no mode
is set, the default of 0o666
will be used.
The operating system masks out bits with the system’s umask
, to produce
the final permissions.
§Examples
use std::fs::OpenOptions;
use std::os::unix::fs::OpenOptionsExt;
let mut options = OpenOptions::new();
options.mode(0o644); // Give read/write for owner and read for others.
let file = options.open("foo.txt");
Run1.10.0 · sourcefn custom_flags(&mut self, flags: i32) -> &mut Self
fn custom_flags(&mut self, flags: i32) -> &mut Self
Pass custom flags to the flags
argument of open
.
The bits that define the access mode are masked out with O_ACCMODE
, to
ensure they do not interfere with the access mode set by Rusts options.
Custom flags can only set flags, not remove flags set by Rusts options. This options overwrites any previously set custom flags.
§Examples
use libc;
use std::fs::OpenOptions;
use std::os::unix::fs::OpenOptionsExt;
let mut options = OpenOptions::new();
options.write(true);
if cfg!(unix) {
options.custom_flags(libc::O_NOFOLLOW);
}
let file = options.open("foo.txt");
RunObject Safety§
This trait is not object safe.