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pxar: change logic and impl all command line flags for xattrs/fcaps/acls

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Allows to individually set the flags for storing/dumping/restoring of
xattrs/fcaps/acls in the cli of pxar.
Changes logic so that each of them can be threated individually.

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
This commit is contained in:
Christian Ebner 2019-05-28 11:16:21 +02:00 committed by Dietmar Maurer
parent 60e589a111
commit 9b38443314
3 changed files with 88 additions and 21 deletions
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23
src/bin/pxar.rs
View File

@ -48,13 +48,23 @@ fn dump_archive(
) -> Result<Value, Error> {
let archive = tools::required_string_param(&param, "archive")?;
let with_xattrs = param["with-xattrs"].as_bool().unwrap_or(false);
let with_fcaps = param["with-fcaps"].as_bool().unwrap_or(false);
let with_acls = param["with-acls"].as_bool().unwrap_or(false);
let file = std::fs::File::open(archive)?;
let mut reader = std::io::BufReader::new(file);
let mut feature_flags = pxar::CA_FORMAT_DEFAULT;
if !with_xattrs {
feature_flags ^= pxar::CA_FORMAT_WITH_XATTRS;
}
if !with_fcaps {
feature_flags ^= pxar::CA_FORMAT_WITH_FCAPS;
}
if !with_acls {
feature_flags ^= pxar::CA_FORMAT_WITH_ACL;
}
let mut decoder = pxar::SequentialDecoder::new(&mut reader, feature_flags);
let stdout = std::io::stdout();
@ -79,6 +89,7 @@ fn extract_archive(
let verbose = param["verbose"].as_bool().unwrap_or(false);
let no_xattrs = param["no-xattrs"].as_bool().unwrap_or(false);
let no_fcaps = param["no-fcaps"].as_bool().unwrap_or(false);
let no_acls = param["no-acls"].as_bool().unwrap_or(false);
let file = std::fs::File::open(archive)?;
@ -90,6 +101,9 @@ fn extract_archive(
if no_fcaps {
feature_flags ^= pxar::CA_FORMAT_WITH_FCAPS;
}
if no_acls {
feature_flags ^= pxar::CA_FORMAT_WITH_ACL;
}
let mut decoder = pxar::SequentialDecoder::new(&mut reader, feature_flags);
@ -115,6 +129,7 @@ fn create_archive(
let all_file_systems = param["all-file-systems"].as_bool().unwrap_or(false);
let no_xattrs = param["no-xattrs"].as_bool().unwrap_or(false);
let no_fcaps = param["no-fcaps"].as_bool().unwrap_or(false);
let no_acls = param["no-acls"].as_bool().unwrap_or(false);
let source = PathBuf::from(source);
@ -135,6 +150,9 @@ fn create_archive(
if no_fcaps {
feature_flags ^= pxar::CA_FORMAT_WITH_FCAPS;
}
if no_acls {
feature_flags ^= pxar::CA_FORMAT_WITH_ACL;
}
pxar::Encoder::encode(source, &mut dir, &mut writer, all_file_systems, verbose, feature_flags)?;
@ -155,6 +173,7 @@ fn main() {
.optional("verbose", BooleanSchema::new("Verbose output.").default(false))
.optional("no-xattrs", BooleanSchema::new("Ignore extended file attributes.").default(false))
.optional("no-fcaps", BooleanSchema::new("Ignore file capabilities.").default(false))
.optional("no-acls", BooleanSchema::new("Ignore access control list entries.").default(false))
.optional("all-file-systems", BooleanSchema::new("Include mounted sudirs.").default(false))
))
.arg_param(vec!["archive", "source"])
@ -171,6 +190,7 @@ fn main() {
.optional("verbose", BooleanSchema::new("Verbose output.").default(false))
.optional("no-xattrs", BooleanSchema::new("Ignore extended file attributes.").default(false))
.optional("no-fcaps", BooleanSchema::new("Ignore file capabilities.").default(false))
.optional("no-acls", BooleanSchema::new("Ignore access control list entries.").default(false))
))
.arg_param(vec!["archive", "target"])
.completion_cb("archive", tools::complete_file_name)
@ -192,6 +212,9 @@ fn main() {
dump_archive,
ObjectSchema::new("Textual dump of archive contents (debug toolkit).")
.required("archive", StringSchema::new("Archive name."))
.optional("with-xattrs", BooleanSchema::new("Dump extended file attributes.").default(false))
.optional("with-fcaps", BooleanSchema::new("Dump file capabilities.").default(false))
.optional("with-acls", BooleanSchema::new("Dump access control list entries.").default(false))
))
.arg_param(vec!["archive"])
.completion_cb("archive", tools::complete_file_name)

12
src/pxar/encoder.rs
View File

@ -220,16 +220,22 @@ impl <'a, W: Write> Encoder<'a, W> {
Ok(())
}
/// True if all of the given feature flags are set in the Encoder, false otherwise
fn has_features(&self, feature_flags: u64) -> bool {
(self.feature_flags & feature_flags) == feature_flags
}
/// True if at least one of the given feature flags is set in the Encoder, false otherwise
fn has_some_features(&self, feature_flags: u64) -> bool {
(self.feature_flags & feature_flags) != 0
}
fn read_xattrs(&self, fd: RawFd, stat: &FileStat) -> Result<(Vec<CaFormatXAttr>, Option<CaFormatFCaps>), Error> {
let mut xattrs = Vec::new();
let mut fcaps = None;
let flags = CA_FORMAT_WITH_XATTRS | CA_FORMAT_WITH_FCAPS;
if !self.has_features(flags) {
if !self.has_some_features(flags) {
return Ok((xattrs, fcaps));
}
// Should never be called on symlinks, just in case check anyway
@ -260,11 +266,13 @@ impl <'a, W: Write> Encoder<'a, W> {
};
if xattr::is_security_capability(&name) {
if self.has_features(CA_FORMAT_WITH_FCAPS) {
// fcaps are stored in own format within the archive
fcaps = Some(CaFormatFCaps {
data: value,
});
} else {
}
} else if self.has_features(CA_FORMAT_WITH_XATTRS) {
xattrs.push(CaFormatXAttr {
name: name.to_vec(),
value: value,

62
src/pxar/sequential_decoder.rs
View File

@ -778,20 +778,56 @@ impl <'a, R: Read> SequentialDecoder<'a, R> {
}
fn dump_if_attribute(&mut self, header: &CaFormatHeader, verbose: bool) -> Result<bool, Error> {
let dump_string = match header.htype {
CA_FORMAT_XATTR => format!("XAttr: {:?}", self.read_xattr((header.size - HEADER_SIZE) as usize)?),
CA_FORMAT_FCAPS => format!("FCaps: {:?}", self.read_fcaps((header.size - HEADER_SIZE) as usize)?),
CA_FORMAT_ACL_USER => format!("ACLUser: {:?}", self.read_item::<CaFormatACLUser>()?),
CA_FORMAT_ACL_GROUP => format!("ACLGroup: {:?}", self.read_item::<CaFormatACLGroup>()?),
CA_FORMAT_ACL_GROUP_OBJ => format!("ACLGroupObj: {:?}", self.read_item::<CaFormatACLGroupObj>()?),
CA_FORMAT_ACL_DEFAULT => format!("ACLDefault: {:?}", self.read_item::<CaFormatACLDefault>()?),
CA_FORMAT_ACL_DEFAULT_USER => format!("ACLDefaultUser: {:?}", self.read_item::<CaFormatACLUser>()?),
CA_FORMAT_ACL_DEFAULT_GROUP => format!("ACLDefaultGroup: {:?}", self.read_item::<CaFormatACLGroup>()?),
match header.htype {
CA_FORMAT_XATTR => {
let xattr = self.read_xattr((header.size - HEADER_SIZE) as usize)?;
if verbose && self.has_features(CA_FORMAT_WITH_XATTRS) {
println!("XAttr: {:?}", xattr);
}
},
CA_FORMAT_FCAPS => {
let fcaps = self.read_fcaps((header.size - HEADER_SIZE) as usize)?;
if verbose && self.has_features(CA_FORMAT_WITH_FCAPS) {
println!("FCaps: {:?}", fcaps);
}
},
CA_FORMAT_ACL_USER => {
let user = self.read_item::<CaFormatACLUser>()?;
if verbose && self.has_features(CA_FORMAT_WITH_ACL) {
println!("ACLUser: {:?}", user);
}
},
CA_FORMAT_ACL_GROUP => {
let group = self.read_item::<CaFormatACLGroup>()?;
if verbose && self.has_features(CA_FORMAT_WITH_ACL) {
println!("ACLGroup: {:?}", group);
}
},
CA_FORMAT_ACL_GROUP_OBJ => {
let group_obj = self.read_item::<CaFormatACLGroupObj>()?;
if verbose && self.has_features(CA_FORMAT_WITH_ACL) {
println!("ACLGroupObj: {:?}", group_obj);
}
},
CA_FORMAT_ACL_DEFAULT => {
let default = self.read_item::<CaFormatACLDefault>()?;
if verbose && self.has_features(CA_FORMAT_WITH_ACL) {
println!("ACLDefault: {:?}", default);
}
},
CA_FORMAT_ACL_DEFAULT_USER => {
let default_user = self.read_item::<CaFormatACLUser>()?;
if verbose && self.has_features(CA_FORMAT_WITH_ACL) {
println!("ACLDefaultUser: {:?}", default_user);
}
},
CA_FORMAT_ACL_DEFAULT_GROUP => {
let default_group = self.read_item::<CaFormatACLGroup>()?;
if verbose && self.has_features(CA_FORMAT_WITH_ACL) {
println!("ACLDefaultGroup: {:?}", default_group);
}
},
_ => return Ok(false),
};
let flags = CA_FORMAT_WITH_XATTRS | CA_FORMAT_WITH_FCAPS | CA_FORMAT_WITH_ACL;
if verbose && self.has_features(flags) {
println!("{}", dump_string);
}
Ok(true)