mirror of
https://github.com/edera-dev/krata.git
synced 2025-08-02 21:00:55 +00:00
xenstore: move error type and make use of result type aliases
This commit is contained in:
parent
812e357bc9
commit
eba623d61a
@ -7,7 +7,6 @@ use std::fmt::{Display, Formatter};
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use std::num::ParseIntError;
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use std::path::StripPrefixError;
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use xenclient::XenClientError;
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use xenstore::bus::XsdBusError;
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pub type Result<T> = std::result::Result<T, HyphaError>;
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@ -117,8 +116,8 @@ impl From<uuid::Error> for HyphaError {
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}
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}
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impl From<XsdBusError> for HyphaError {
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fn from(value: XsdBusError) -> Self {
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impl From<xenstore::error::Error> for HyphaError {
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fn from(value: xenstore::error::Error) -> Self {
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HyphaError::new(value.to_string().as_str())
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}
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}
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@ -20,7 +20,6 @@ use uuid::Uuid;
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use xencall::sys::CreateDomain;
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use xencall::{XenCall, XenCallError};
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use xenevtchn::EventChannelError;
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use xenstore::bus::XsdBusError;
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use xenstore::client::{
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XsPermission, XsdClient, XsdInterface, XS_PERM_NONE, XS_PERM_READ, XS_PERM_READ_WRITE,
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};
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@ -61,8 +60,8 @@ impl From<std::io::Error> for XenClientError {
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}
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}
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impl From<XsdBusError> for XenClientError {
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fn from(value: XsdBusError) -> Self {
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impl From<xenstore::error::Error> for XenClientError {
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fn from(value: xenstore::error::Error) -> Self {
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XenClientError::new(value.to_string().as_str())
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}
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}
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@ -1,8 +1,8 @@
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use xenstore::bus::XsdBusError;
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use xenstore::client::{XsdClient, XsdInterface};
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use xenstore::error::Result;
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use xenstore::sys::XSD_ERROR_EINVAL;
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fn list_recursive(client: &mut XsdClient, level: usize, path: &str) -> Result<(), XsdBusError> {
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fn list_recursive(client: &mut XsdClient, level: usize, path: &str) -> Result<()> {
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let children = match client.list(path) {
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Ok(children) => children,
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Err(error) => {
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@ -28,7 +28,7 @@ fn list_recursive(client: &mut XsdClient, level: usize, path: &str) -> Result<()
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Ok(())
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}
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fn main() -> Result<(), XsdBusError> {
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fn main() -> Result<()> {
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let mut client = XsdClient::open()?;
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list_recursive(&mut client, 0, "/")?;
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Ok(())
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@ -1,15 +1,11 @@
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use crate::error::{Error, Result};
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use crate::sys::{XsdMessageHeader, XSD_ERROR};
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use std::ffi::{CString, FromVecWithNulError, IntoStringError, NulError};
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use std::ffi::CString;
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use std::fs::metadata;
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use std::io;
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use std::io::{Read, Write};
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use std::mem::size_of;
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use std::net::Shutdown;
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use std::num::ParseIntError;
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use std::os::unix::net::UnixStream;
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use std::str::Utf8Error;
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use std::string::FromUtf8Error;
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use thiserror::Error;
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const XEN_BUS_PATHS: &[&str] = &["/var/run/xenstored/socket"];
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@ -23,30 +19,6 @@ fn find_bus_path() -> Option<String> {
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None
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}
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#[derive(Error, Debug)]
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pub enum XsdBusError {
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#[error("io issue encountered")]
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Io(#[from] io::Error),
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#[error("utf8 string decode failed")]
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Utf8DecodeString(#[from] FromUtf8Error),
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#[error("utf8 str decode failed")]
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Utf8DecodeStr(#[from] Utf8Error),
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#[error("unable to decode cstring as utf8")]
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Utf8DecodeCstring(#[from] IntoStringError),
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#[error("nul byte found in string")]
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NulByteFoundString(#[from] NulError),
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#[error("unable to find nul byte in vec")]
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VecNulByteNotFound(#[from] FromVecWithNulError),
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#[error("unable to parse integer")]
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ParseInt(#[from] ParseIntError),
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#[error("bus was not found on any available path")]
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BusNotFound,
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#[error("store responded with error: `{0}`")]
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ResponseError(String),
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#[error("invalid permissions provided")]
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InvalidPermissions,
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}
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pub struct XsdSocket {
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handle: UnixStream,
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}
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@ -58,11 +30,11 @@ pub struct XsdResponse {
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}
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impl XsdResponse {
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pub fn parse_string(&self) -> Result<String, XsdBusError> {
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pub fn parse_string(&self) -> Result<String> {
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Ok(CString::from_vec_with_nul(self.payload.clone())?.into_string()?)
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}
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pub fn parse_string_vec(&self) -> Result<Vec<String>, XsdBusError> {
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pub fn parse_string_vec(&self) -> Result<Vec<String>> {
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let mut strings: Vec<String> = Vec::new();
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let mut buffer: Vec<u8> = Vec::new();
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for b in &self.payload {
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@ -77,22 +49,22 @@ impl XsdResponse {
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Ok(strings)
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}
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pub fn parse_bool(&self) -> Result<bool, XsdBusError> {
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pub fn parse_bool(&self) -> Result<bool> {
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Ok(true)
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}
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}
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impl XsdSocket {
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pub fn dial() -> Result<XsdSocket, XsdBusError> {
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pub fn dial() -> Result<XsdSocket> {
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let path = match find_bus_path() {
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Some(path) => path,
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None => return Err(XsdBusError::BusNotFound),
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None => return Err(Error::BusNotFound),
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};
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let stream = UnixStream::connect(path)?;
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Ok(XsdSocket { handle: stream })
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}
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pub fn send(&mut self, tx: u32, typ: u32, buf: &[u8]) -> Result<XsdResponse, XsdBusError> {
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pub fn send(&mut self, tx: u32, typ: u32, buf: &[u8]) -> Result<XsdResponse> {
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let header = XsdMessageHeader {
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typ,
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req: 0,
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@ -108,29 +80,19 @@ impl XsdSocket {
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self.handle.read_exact(payload.as_mut_slice())?;
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if result_header.typ == XSD_ERROR {
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let error = CString::from_vec_with_nul(payload)?;
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return Err(XsdBusError::ResponseError(error.into_string()?));
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return Err(Error::ResponseError(error.into_string()?));
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}
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let response = XsdResponse { header, payload };
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Ok(response)
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}
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pub fn send_single(
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&mut self,
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tx: u32,
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typ: u32,
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string: &str,
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) -> Result<XsdResponse, XsdBusError> {
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pub fn send_single(&mut self, tx: u32, typ: u32, string: &str) -> Result<XsdResponse> {
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let text = CString::new(string)?;
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let buf = text.as_bytes_with_nul();
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self.send(tx, typ, buf)
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}
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pub fn send_multiple(
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&mut self,
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tx: u32,
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typ: u32,
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array: &[&str],
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) -> Result<XsdResponse, XsdBusError> {
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pub fn send_multiple(&mut self, tx: u32, typ: u32, array: &[&str]) -> Result<XsdResponse> {
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let mut buf: Vec<u8> = Vec::new();
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for item in array {
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buf.extend_from_slice(item.as_bytes());
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@ -1,4 +1,5 @@
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use crate::bus::{XsdBusError, XsdSocket};
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use crate::bus::XsdSocket;
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use crate::error::{Error, Result};
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use crate::sys::{
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XSD_DIRECTORY, XSD_GET_DOMAIN_PATH, XSD_INTRODUCE, XSD_MKDIR, XSD_READ, XSD_RM, XSD_SET_PERMS,
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XSD_TRANSACTION_END, XSD_TRANSACTION_START, XSD_WRITE,
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@ -22,35 +23,35 @@ pub struct XsPermission {
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}
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impl XsPermission {
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pub fn encode(&self) -> Result<String, XsdBusError> {
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pub fn encode(&self) -> Result<String> {
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let c = match self.perms {
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XS_PERM_READ_WRITE => 'b',
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XS_PERM_WRITE => 'w',
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XS_PERM_READ => 'r',
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XS_PERM_NONE => 'n',
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_ => return Err(XsdBusError::InvalidPermissions),
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_ => return Err(Error::InvalidPermissions),
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};
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Ok(format!("{}{}", c, self.id))
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}
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}
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pub trait XsdInterface {
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fn list(&mut self, path: &str) -> Result<Vec<String>, XsdBusError>;
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fn read(&mut self, path: &str) -> Result<Vec<u8>, XsdBusError>;
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fn read_string(&mut self, path: &str) -> Result<String, XsdBusError>;
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fn write(&mut self, path: &str, data: Vec<u8>) -> Result<bool, XsdBusError>;
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fn write_string(&mut self, path: &str, data: &str) -> Result<bool, XsdBusError>;
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fn mkdir(&mut self, path: &str) -> Result<bool, XsdBusError>;
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fn rm(&mut self, path: &str) -> Result<bool, XsdBusError>;
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fn set_perms(&mut self, path: &str, perms: &[XsPermission]) -> Result<bool, XsdBusError>;
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fn list(&mut self, path: &str) -> Result<Vec<String>>;
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fn read(&mut self, path: &str) -> Result<Vec<u8>>;
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fn read_string(&mut self, path: &str) -> Result<String>;
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fn write(&mut self, path: &str, data: Vec<u8>) -> Result<bool>;
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fn write_string(&mut self, path: &str, data: &str) -> Result<bool>;
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fn mkdir(&mut self, path: &str) -> Result<bool>;
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fn rm(&mut self, path: &str) -> Result<bool>;
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fn set_perms(&mut self, path: &str, perms: &[XsPermission]) -> Result<bool>;
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fn mknod(&mut self, path: &str, perms: &[XsPermission]) -> Result<bool, XsdBusError> {
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fn mknod(&mut self, path: &str, perms: &[XsPermission]) -> Result<bool> {
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let result1 = self.write_string(path, "")?;
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let result2 = self.set_perms(path, perms)?;
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Ok(result1 && result2)
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}
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fn read_string_optional(&mut self, path: &str) -> Result<Option<String>, XsdBusError> {
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fn read_string_optional(&mut self, path: &str) -> Result<Option<String>> {
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Ok(match self.read_string(path) {
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Ok(value) => Some(value),
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Err(error) => {
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@ -63,7 +64,7 @@ pub trait XsdInterface {
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})
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}
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fn list_any(&mut self, path: &str) -> Result<Vec<String>, XsdBusError> {
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fn list_any(&mut self, path: &str) -> Result<Vec<String>> {
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Ok(match self.list(path) {
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Ok(value) => value,
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Err(error) => {
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@ -78,24 +79,24 @@ pub trait XsdInterface {
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}
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impl XsdClient {
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pub fn open() -> Result<XsdClient, XsdBusError> {
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pub fn open() -> Result<XsdClient> {
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let socket = XsdSocket::dial()?;
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Ok(XsdClient { socket })
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}
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fn list(&mut self, tx: u32, path: &str) -> Result<Vec<String>, XsdBusError> {
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fn list(&mut self, tx: u32, path: &str) -> Result<Vec<String>> {
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trace!("list tx={tx} path={path}");
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let response = self.socket.send_single(tx, XSD_DIRECTORY, path)?;
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response.parse_string_vec()
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}
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fn read(&mut self, tx: u32, path: &str) -> Result<Vec<u8>, XsdBusError> {
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fn read(&mut self, tx: u32, path: &str) -> Result<Vec<u8>> {
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trace!("read tx={tx} path={path}");
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let response = self.socket.send_single(tx, XSD_READ, path)?;
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Ok(response.payload)
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}
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fn write(&mut self, tx: u32, path: &str, data: Vec<u8>) -> Result<bool, XsdBusError> {
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fn write(&mut self, tx: u32, path: &str, data: Vec<u8>) -> Result<bool> {
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trace!("write tx={tx} path={path} data={:?}", data);
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let mut buffer = Vec::new();
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let path = CString::new(path)?;
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@ -105,12 +106,12 @@ impl XsdClient {
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response.parse_bool()
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}
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fn mkdir(&mut self, tx: u32, path: &str) -> Result<bool, XsdBusError> {
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fn mkdir(&mut self, tx: u32, path: &str) -> Result<bool> {
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trace!("mkdir tx={tx} path={path}");
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self.socket.send_single(tx, XSD_MKDIR, path)?.parse_bool()
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}
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fn rm(&mut self, tx: u32, path: &str) -> Result<bool, XsdBusError> {
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fn rm(&mut self, tx: u32, path: &str) -> Result<bool> {
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trace!("rm tx={tx} path={path}");
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let result = self.socket.send_single(tx, XSD_RM, path);
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if let Err(error) = result {
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@ -122,12 +123,7 @@ impl XsdClient {
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result.unwrap().parse_bool()
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}
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fn set_perms(
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&mut self,
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tx: u32,
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path: &str,
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perms: &[XsPermission],
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) -> Result<bool, XsdBusError> {
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fn set_perms(&mut self, tx: u32, path: &str, perms: &[XsPermission]) -> Result<bool> {
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trace!("set_perms tx={tx} path={path} perms={:?}", perms);
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let mut items: Vec<String> = Vec::new();
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items.push(path.to_string());
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@ -139,7 +135,7 @@ impl XsdClient {
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response.parse_bool()
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}
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pub fn transaction(&mut self) -> Result<XsdTransaction, XsdBusError> {
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pub fn transaction(&mut self) -> Result<XsdTransaction> {
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trace!("transaction start");
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let response = self.socket.send_single(0, XSD_TRANSACTION_START, "")?;
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let str = response.parse_string()?;
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@ -147,19 +143,14 @@ impl XsdClient {
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Ok(XsdTransaction { client: self, tx })
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}
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pub fn get_domain_path(&mut self, domid: u32) -> Result<String, XsdBusError> {
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pub fn get_domain_path(&mut self, domid: u32) -> Result<String> {
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let response =
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self.socket
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.send_single(0, XSD_GET_DOMAIN_PATH, domid.to_string().as_str())?;
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response.parse_string()
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}
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pub fn introduce_domain(
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&mut self,
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domid: u32,
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mfn: u64,
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evtchn: u32,
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) -> Result<bool, XsdBusError> {
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pub fn introduce_domain(&mut self, domid: u32, mfn: u64, evtchn: u32) -> Result<bool> {
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trace!("introduce domain domid={domid} mfn={mfn} evtchn={evtchn}");
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let response = self.socket.send_multiple(
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0,
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@ -180,75 +171,75 @@ pub struct XsdTransaction<'a> {
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}
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impl XsdInterface for XsdClient {
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fn list(&mut self, path: &str) -> Result<Vec<String>, XsdBusError> {
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fn list(&mut self, path: &str) -> Result<Vec<String>> {
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self.list(0, path)
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}
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fn read(&mut self, path: &str) -> Result<Vec<u8>, XsdBusError> {
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fn read(&mut self, path: &str) -> Result<Vec<u8>> {
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self.read(0, path)
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}
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fn read_string(&mut self, path: &str) -> Result<String, XsdBusError> {
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fn read_string(&mut self, path: &str) -> Result<String> {
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Ok(String::from_utf8(self.read(0, path)?)?)
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}
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fn write(&mut self, path: &str, data: Vec<u8>) -> Result<bool, XsdBusError> {
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fn write(&mut self, path: &str, data: Vec<u8>) -> Result<bool> {
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self.write(0, path, data)
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}
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fn write_string(&mut self, path: &str, data: &str) -> Result<bool, XsdBusError> {
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fn write_string(&mut self, path: &str, data: &str) -> Result<bool> {
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self.write(0, path, data.as_bytes().to_vec())
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}
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fn mkdir(&mut self, path: &str) -> Result<bool, XsdBusError> {
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fn mkdir(&mut self, path: &str) -> Result<bool> {
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self.mkdir(0, path)
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}
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fn rm(&mut self, path: &str) -> Result<bool, XsdBusError> {
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fn rm(&mut self, path: &str) -> Result<bool> {
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self.rm(0, path)
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}
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fn set_perms(&mut self, path: &str, perms: &[XsPermission]) -> Result<bool, XsdBusError> {
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fn set_perms(&mut self, path: &str, perms: &[XsPermission]) -> Result<bool> {
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self.set_perms(0, path, perms)
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}
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}
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impl XsdInterface for XsdTransaction<'_> {
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fn list(&mut self, path: &str) -> Result<Vec<String>, XsdBusError> {
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fn list(&mut self, path: &str) -> Result<Vec<String>> {
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self.client.list(self.tx, path)
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}
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fn read(&mut self, path: &str) -> Result<Vec<u8>, XsdBusError> {
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fn read(&mut self, path: &str) -> Result<Vec<u8>> {
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self.client.read(self.tx, path)
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}
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fn read_string(&mut self, path: &str) -> Result<String, XsdBusError> {
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fn read_string(&mut self, path: &str) -> Result<String> {
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Ok(String::from_utf8(self.client.read(self.tx, path)?)?)
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}
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fn write(&mut self, path: &str, data: Vec<u8>) -> Result<bool, XsdBusError> {
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fn write(&mut self, path: &str, data: Vec<u8>) -> Result<bool> {
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self.client.write(self.tx, path, data)
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}
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fn write_string(&mut self, path: &str, data: &str) -> Result<bool, XsdBusError> {
|
||||
fn write_string(&mut self, path: &str, data: &str) -> Result<bool> {
|
||||
self.client.write(self.tx, path, data.as_bytes().to_vec())
|
||||
}
|
||||
|
||||
fn mkdir(&mut self, path: &str) -> Result<bool, XsdBusError> {
|
||||
fn mkdir(&mut self, path: &str) -> Result<bool> {
|
||||
self.client.mkdir(self.tx, path)
|
||||
}
|
||||
|
||||
fn rm(&mut self, path: &str) -> Result<bool, XsdBusError> {
|
||||
fn rm(&mut self, path: &str) -> Result<bool> {
|
||||
self.client.rm(self.tx, path)
|
||||
}
|
||||
|
||||
fn set_perms(&mut self, path: &str, perms: &[XsPermission]) -> Result<bool, XsdBusError> {
|
||||
fn set_perms(&mut self, path: &str, perms: &[XsPermission]) -> Result<bool> {
|
||||
self.client.set_perms(self.tx, path, perms)
|
||||
}
|
||||
}
|
||||
|
||||
impl XsdTransaction<'_> {
|
||||
pub fn end(&mut self, abort: bool) -> Result<bool, XsdBusError> {
|
||||
pub fn end(&mut self, abort: bool) -> Result<bool> {
|
||||
let abort_str = if abort { "F" } else { "T" };
|
||||
|
||||
trace!("transaction end abort={}", abort);
|
||||
@ -258,11 +249,11 @@ impl XsdTransaction<'_> {
|
||||
.parse_bool()
|
||||
}
|
||||
|
||||
pub fn commit(&mut self) -> Result<bool, XsdBusError> {
|
||||
pub fn commit(&mut self) -> Result<bool> {
|
||||
self.end(false)
|
||||
}
|
||||
|
||||
pub fn abort(&mut self) -> Result<bool, XsdBusError> {
|
||||
pub fn abort(&mut self) -> Result<bool> {
|
||||
self.end(true)
|
||||
}
|
||||
}
|
||||
|
31
xen/xenstore/src/error.rs
Normal file
31
xen/xenstore/src/error.rs
Normal file
@ -0,0 +1,31 @@
|
||||
use std::ffi::{FromVecWithNulError, IntoStringError, NulError};
|
||||
use std::io;
|
||||
use std::num::ParseIntError;
|
||||
use std::str::Utf8Error;
|
||||
use std::string::FromUtf8Error;
|
||||
|
||||
#[derive(thiserror::Error, Debug)]
|
||||
pub enum Error {
|
||||
#[error("io issue encountered")]
|
||||
Io(#[from] io::Error),
|
||||
#[error("utf8 string decode failed")]
|
||||
Utf8DecodeString(#[from] FromUtf8Error),
|
||||
#[error("utf8 str decode failed")]
|
||||
Utf8DecodeStr(#[from] Utf8Error),
|
||||
#[error("unable to decode cstring as utf8")]
|
||||
Utf8DecodeCstring(#[from] IntoStringError),
|
||||
#[error("nul byte found in string")]
|
||||
NulByteFoundString(#[from] NulError),
|
||||
#[error("unable to find nul byte in vec")]
|
||||
VecNulByteNotFound(#[from] FromVecWithNulError),
|
||||
#[error("unable to parse integer")]
|
||||
ParseInt(#[from] ParseIntError),
|
||||
#[error("bus was not found on any available path")]
|
||||
BusNotFound,
|
||||
#[error("store responded with error: `{0}`")]
|
||||
ResponseError(String),
|
||||
#[error("invalid permissions provided")]
|
||||
InvalidPermissions,
|
||||
}
|
||||
|
||||
pub type Result<T> = std::result::Result<T, Error>;
|
@ -1,3 +1,4 @@
|
||||
pub mod bus;
|
||||
pub mod client;
|
||||
pub mod error;
|
||||
pub mod sys;
|
||||
|
@ -1,6 +1,6 @@
|
||||
use bytemuck::{Pod, Zeroable};
|
||||
/// Handwritten protocol definitions for XenStore.
|
||||
/// Used xen/include/public/io/xs_wire.h as a reference.
|
||||
use bytemuck::{Pod, Zeroable};
|
||||
use libc;
|
||||
|
||||
#[derive(Copy, Clone, Pod, Zeroable, Debug)]
|
||||
|
Loading…
Reference in New Issue
Block a user