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Impl Ref::fs_link_valid_permissions()

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This commit is contained in:
Matthias Beyer 2016-06-24 16:58:41 +02:00
parent 4b98b168e5
commit 5bf11af82c
1 changed files with 30 additions and 2 deletions
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32
libimagref/src/reference.rs
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@ -218,8 +218,36 @@ impl<'a> Ref<'a> {
/// Check whether the file permissions of the referenced file are equal to the stored
/// permissions
pub fn fs_link_valid_permissions(&self) -> bool {
unimplemented!()
pub fn fs_link_valid_permissions(&self) -> Result<bool> {
self.0
.get_header()
.read("ref.permissions.ro")
.map_err(Box::new)
.map_err(|e| REK::HeaderFieldReadError.into_error_with_cause(e))
.and_then(|ro| {
match ro {
Some(Value::Boolean(b)) => Ok(b),
Some(_) => Err(REK::HeaderTypeError.into_error()),
None => Err(REK::HeaderFieldMissingError.into_error()),
}
})
.and_then(|ro| self.fs_file().map(|pb| (ro, pb)))
.and_then(|(ro, pb)| {
File::open(pb)
.map(|file| (ro, file))
.map_err(Box::new)
.map_err(|e| REK::HeaderFieldReadError.into_error_with_cause(e))
})
.and_then(|(ro, file)| {
file
.metadata()
.map(|md| md.permissions())
.map(|perm| perm.readonly() == ro)
.map_err(Box::new)
.map_err(|e| REK::RefTargetCannotReadPermissions.into_error_with_cause(e))
})
.map_err(Box::new)
.map_err(|e| REK::RefTargetCannotReadPermissions.into_error_with_cause(e))
}
/// Check whether the Hashsum of the referenced file is equal to the stored hashsum