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Retain suid/sgid/sticky bits in Metadata.permissions

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Most users would expect set_permissions(Metadata.permissions()) to be
non-destructive. While we can't guarantee this, we can at least pass
the needed info to chmod.

Also update the PermissionsExt documentation to disambiguate what it
contains, and to refer to the underlying value as `st_mode` rather than
its type `mode_t`.

Closes #44147
This commit is contained in:
Trevor Merrifield 2017-09-11 20:02:44 -04:00
parent fd4bef54ab
commit e391079496
2 changed files with 3 additions and 3 deletions
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4
src/libstd/sys/unix/ext/fs.rs
View File

@ -68,8 +68,8 @@ impl FileExt for fs::File {
/// Unix-specific extensions to `Permissions`
#[stable(feature = "fs_ext", since = "1.1.0")]
pub trait PermissionsExt {
/// Returns the underlying raw `mode_t` bits that are the standard Unix
/// permissions for this file.
/// Returns the 12 least significant bits of `st_mode` which are the
/// standard Unix permissions for this file.
///
/// # Examples
///

2
src/libstd/sys/unix/fs.rs
View File

@ -95,7 +95,7 @@ pub struct DirBuilder { mode: mode_t }
impl FileAttr {
pub fn size(&self) -> u64 { self.stat.st_size as u64 }
pub fn perm(&self) -> FilePermissions {
FilePermissions { mode: (self.stat.st_mode as mode_t) & 0o777 }
FilePermissions { mode: (self.stat.st_mode as mode_t) & 0o7777 }
}
pub fn file_type(&self) -> FileType {