Implement O_DIRECTORY
This commit is contained in:
Jeremy Soller
+45
-76
@@ -9,7 +9,7 @@ use std::sync::atomic::{AtomicUsize, Ordering};
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use syscall::data::{Stat, StatVfs};
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use syscall::error::{Error, Result, EACCES, EEXIST, EISDIR, ENOTDIR, EPERM, ENOENT, EBADF};
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use syscall::flag::{O_CREAT, O_TRUNC, O_ACCMODE, O_RDONLY, O_WRONLY, O_RDWR, MODE_PERM};
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use syscall::flag::{O_CREAT, O_DIRECTORY, O_STAT, O_EXCL, O_TRUNC, O_ACCMODE, O_RDONLY, O_WRONLY, O_RDWR, MODE_PERM};
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use syscall::scheme::Scheme;
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pub struct FileScheme {
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@@ -51,31 +51,46 @@ impl Scheme for FileScheme {
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}
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let resource: Box<Resource> = match node_result {
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Ok(node) => if node.1.is_dir() {
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if flags & O_ACCMODE != O_RDONLY {
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Ok(node) => if flags & (O_CREAT | O_EXCL) == O_CREAT | O_EXCL {
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return Err(Error::new(EEXIST));
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} else if node.1.is_dir() {
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if flags & O_STAT != O_STAT && flags & O_DIRECTORY != O_DIRECTORY {
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// println!("{:X} & {:X}: EISDIR {}", flags, O_DIRECTORY, path);
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return Err(Error::new(EISDIR));
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}
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if flags & O_ACCMODE == O_RDONLY {
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if ! node.1.permission(uid, gid, Node::MODE_READ) {
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// println!("dir not readable {:o}", node.1.mode);
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return Err(Error::new(EACCES));
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}
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let mut children = Vec::new();
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try!(fs.child_nodes(&mut children, node.0));
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let mut data = Vec::new();
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for child in children.iter() {
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if let Ok(name) = child.1.name() {
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if ! data.is_empty() {
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data.push(b'\n');
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}
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data.extend_from_slice(&name.as_bytes());
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}
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}
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Box::new(DirResource::new(path.to_string(), node.0, data))
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} else if flags & O_STAT == O_STAT {
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Box::new(DirResource::new(path.to_string(), node.0, Vec::new()))
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} else {
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// println!("dir not opened with O_RDONLY");
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return Err(Error::new(EACCES));
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}
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if ! node.1.permission(uid, gid, Node::MODE_READ) {
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// println!("dir not readable {:o}", node.1.mode);
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return Err(Error::new(EACCES));
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}
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let mut data = Vec::new();
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let mut children = Vec::new();
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try!(fs.child_nodes(&mut children, node.0));
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for child in children.iter() {
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if let Ok(name) = child.1.name() {
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if ! data.is_empty() {
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data.push(b'\n');
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}
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data.extend_from_slice(&name.as_bytes());
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}
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}
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Box::new(DirResource::new(path.to_string(), node.0, data))
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} else {
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if flags & O_DIRECTORY == O_DIRECTORY {
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// println!("{:X} & {:X}: ENOTDIR {}", flags, O_DIRECTORY, path);
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return Err(Error::new(ENOTDIR));
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}
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if (flags & O_ACCMODE == O_RDONLY || flags & O_ACCMODE == O_RDWR) && ! node.1.permission(uid, gid, Node::MODE_READ) {
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// println!("file not readable {:o}", node.1.mode);
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return Err(Error::new(EACCES));
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@@ -111,7 +126,9 @@ impl Scheme for FileScheme {
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return Err(Error::new(EACCES));
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}
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let mut node = try!(fs.create_node(Node::MODE_FILE | (flags as u16 & Node::MODE_PERM), &last_part, parent.0));
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let dir = flags & O_DIRECTORY == O_DIRECTORY;
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let mut node = try!(fs.create_node(if dir { Node::MODE_DIR } else { Node::MODE_FILE } | (flags as u16 & Node::MODE_PERM), &last_part, parent.0));
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node.1.uid = uid;
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node.1.gid = gid;
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try!(fs.write_at(node.0, &node.1));
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@@ -126,7 +143,11 @@ impl Scheme for FileScheme {
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return Err(Error::new(EACCES));
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}
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Box::new(FileResource::new(path.to_string(), node.0, flags))
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if dir {
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Box::new(DirResource::new(path.to_string(), node.0, Vec::new()))
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} else {
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Box::new(FileResource::new(path.to_string(), node.0, flags))
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}
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} else {
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return Err(Error::new(EPERM));
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}
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@@ -144,58 +165,6 @@ impl Scheme for FileScheme {
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Ok(id)
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}
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fn mkdir(&self, url: &[u8], mode: u16, uid: u32, gid: u32) -> Result<usize> {
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let path = str::from_utf8(url).unwrap_or("").trim_matches('/');
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// println!("Mkdir '{}'", path);
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let mut fs = self.fs.borrow_mut();
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let mut nodes = Vec::new();
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let node_result = fs.path_nodes(path, &mut nodes);
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for node in nodes.iter() {
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if ! node.1.permission(uid, gid, Node::MODE_EXEC) {
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// println!("dir not executable {:o}", node.1.mode);
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return Err(Error::new(EACCES));
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}
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if ! node.1.is_dir() {
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return Err(Error::new(ENOTDIR));
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}
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}
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match node_result {
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Ok(_node) => Err(Error::new(EEXIST)),
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Err(err) => if err.errno == ENOENT {
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let mut last_part = String::new();
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for part in path.split('/') {
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if ! part.is_empty() {
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last_part = part.to_owned();
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}
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}
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if ! last_part.is_empty() {
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if let Some(parent) = nodes.last() {
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if ! parent.1.permission(uid, gid, Node::MODE_WRITE) {
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// println!("dir not writable {:o}", parent.1.mode);
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return Err(Error::new(EACCES));
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}
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let mut node = try!(fs.create_node(Node::MODE_DIR | (mode & Node::MODE_PERM), &last_part, parent.0));
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node.1.uid = uid;
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node.1.gid = gid;
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try!(fs.write_at(node.0, &node.1));
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Ok(0)
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} else {
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Err(Error::new(EPERM))
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}
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} else {
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Err(Error::new(EPERM))
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}
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} else {
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Err(err)
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}
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}
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}
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fn chmod(&self, url: &[u8], mode: u16, uid: u32, gid: u32) -> Result<usize> {
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let path = str::from_utf8(url).unwrap_or("").trim_matches('/');
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