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https://github.com/Llewellynvdm/exa.git
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Implement display of extended attributes
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124
src/attr/attr_darwin.rs
Normal file
124
src/attr/attr_darwin.rs
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@ -0,0 +1,124 @@
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//! Extended attribute support for darwin
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extern crate libc;
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use std::ffi::CString;
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use std::ptr;
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use std::mem;
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use std::old_io as io;
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use self::libc::{c_int, size_t, ssize_t, c_char, c_void, uint32_t};
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/// Don't follow symbolic links
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const XATTR_NOFOLLOW: c_int = 0x0001;
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/// Expose HFS Compression extended attributes
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const XATTR_SHOWCOMPRESSION: c_int = 0x0020;
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extern "C" {
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fn listxattr(path: *const c_char, namebuf: *mut c_char,
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size: size_t, options: c_int) -> ssize_t;
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fn getxattr(path: *const c_char, name: *const c_char,
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value: *mut c_void, size: size_t, position: uint32_t,
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options: c_int) -> ssize_t;
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}
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/// Attributes which can be passed to `Attribute::list_with_flags`
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#[derive(Copy)]
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pub enum ListFlags {
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/// Don't follow symbolic links
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NoFollow = XATTR_NOFOLLOW as isize,
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/// Expose HFS Compression extended attributes
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ShowCompression = XATTR_SHOWCOMPRESSION as isize
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}
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/// Extended attribute
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#[derive(Debug, Clone)]
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pub struct Attribute {
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name: String,
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size: usize,
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}
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impl Attribute {
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/// Lists the extended attribute of `path`.
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/// Does follow symlinks by default.
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pub fn list(path: &Path, flags: &[ListFlags]) -> io::IoResult<Vec<Attribute>> {
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let mut c_flags: c_int = 0;
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for &flag in flags.iter() {
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c_flags |= flag as c_int
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}
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let c_path = try!(CString::new(path.as_vec()));
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let bufsize = unsafe { listxattr(
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c_path.as_ptr(),
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ptr::null_mut(),
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0, c_flags
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)} as isize;
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if bufsize > 0 {
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let mut buf = vec![0u8; bufsize as usize];
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let err = unsafe { listxattr(
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c_path.as_ptr(),
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buf.as_mut_ptr() as *mut c_char,
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bufsize as size_t, c_flags
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)};
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if err > 0 {
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// End indicies of the attribute names
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// the buffer contains 0-terminates c-strings
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let idx = buf.iter().enumerate().filter_map(|(i, v)|
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if *v == 0 { Some(i) } else { None }
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);
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let mut names = Vec::new();
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let mut start = 0;
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for end in idx {
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let size = unsafe {
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getxattr(
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c_path.as_ptr(),
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buf[start..end+1].as_ptr() as *const c_char,
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ptr::null_mut(), 0, 0, c_flags
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)
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};
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if size > 0 {
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names.push(Attribute {
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name: unsafe {
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// buf is guaranteed to contain valid utf8 strings
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// see man listxattr
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mem::transmute::<&[u8], &str>(&buf[start..end]).to_string()
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},
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size: size as usize
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});
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}
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start = end + 1;
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}
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println!("{:?}", names);
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Ok(names)
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} else {
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// Ignore error for now
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Ok(Vec::new())
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}
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} else {
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// Ignore error for now
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Ok(Vec::new())
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}
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}
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/// Getter for name
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pub fn name(&self) -> &str {
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&self.name
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}
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/// Getter for size
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pub fn size(&self) -> usize {
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self.size
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}
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}
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/// Lists the extended attributes.
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/// Follows symlinks like `stat`
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pub fn list(path: &Path) -> io::IoResult<Vec<Attribute>> {
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Attribute::list(path, &[])
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}
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/// Lists the extended attributes.
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/// Does not follow symlinks like `lstat`
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pub fn llist(path: &Path) -> io::IoResult<Vec<Attribute>> {
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Attribute::list(path, &[ListFlags::NoFollow])
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}
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/// Returns true if the extended attribute feature is implemented on this platform.
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#[inline(always)]
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pub fn feature_implemented() -> bool { true }
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31
src/attr/attr_other.rs
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31
src/attr/attr_other.rs
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@ -0,0 +1,31 @@
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//! Extended attribute support for other os
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use std::old_io as io;
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/// Extended attribute
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pub struct Attribute;
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impl Attribute {
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/// Getter for name
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pub fn name(&self) -> &str {
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unimplemented!()
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}
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/// Getter for size
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pub fn size(&self) -> usize {
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unimplemented!()
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}
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}
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/// Lists the extended attributes. Follows symlinks like `stat`
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pub fn list(path: &Path) -> io::IoResult<Vec<Attribute>> {
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Vec::new()
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}
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/// Lists the extended attributes. Does not follow symlinks like `lstat`
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pub fn llist(path: &Path) -> io::IoResult<Vec<Attribute>> {
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Vec::new()
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}
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/// Returns true if the extended attribute feature is implemented on this platform.
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#[inline(always)]
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pub fn feature_implemented() -> bool { false }
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10
src/attr/mod.rs
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10
src/attr/mod.rs
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@ -0,0 +1,10 @@
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//! Extended attribute support
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#[cfg(target_os = "macos")]
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mod attr_darwin;
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#[cfg(target_os = "macos")]
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pub use self::attr_darwin::*;
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#[cfg(not(target_os = "macos"))]
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mod attr_other;
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#[cfg(not(target_os = "macos"))]
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pub use self::attr_other::*;
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15
src/file.rs
15
src/file.rs
@ -21,6 +21,8 @@ use column::Column::*;
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use dir::Dir;
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use filetype::HasType;
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use options::{SizeFormat, TimeType};
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use attr;
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use attr::Attribute;
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/// This grey value is directly in between white and black, so it's guaranteed
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/// to show up on either backgrounded terminal.
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@ -39,6 +41,7 @@ pub struct File<'a> {
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pub ext: Option<String>,
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pub path: Path,
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pub stat: io::FileStat,
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pub attrs: Vec<Attribute>,
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pub this: Option<Dir>,
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}
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@ -80,6 +83,7 @@ impl<'a> File<'a> {
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path: path.clone(),
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dir: parent,
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stat: stat,
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attrs: attr::llist(path).unwrap_or(Vec::new()),
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name: filename.to_string(),
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ext: ext(filename.as_slice()),
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this: this,
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@ -192,6 +196,7 @@ impl<'a> File<'a> {
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path: target_path.clone(),
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dir: self.dir,
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stat: stat,
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attrs: attr::list(target_path).unwrap_or(Vec::new()),
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name: filename.to_string(),
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ext: ext(filename.as_slice()),
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this: None,
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@ -340,6 +345,15 @@ impl<'a> File<'a> {
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}
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}
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/// Marker indicating that the file contains extended attributes
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///
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/// Returns “@” or “ ” depending on wheter the file contains an extented
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/// attribute or not. Also returns “ ” in case the attributes cannot be read
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/// for some reason.
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fn attribute_marker(&self) -> ANSIString {
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if self.attrs.len() > 0 { Plain.paint("@") } else { Plain.paint(" ") }
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}
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/// Generate the "rwxrwxrwx" permissions string, like how ls does it.
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///
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/// Each character is given its own colour. The first three permission
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@ -363,6 +377,7 @@ impl<'a> File<'a> {
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File::permission_bit(&bits, io::OTHER_READ, "r", Yellow.normal()),
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File::permission_bit(&bits, io::OTHER_WRITE, "w", Red.normal()),
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File::permission_bit(&bits, io::OTHER_EXECUTE, "x", Green.normal()),
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self.attribute_marker()
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]).to_string();
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Cell { text: string, length: 10 }
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@ -1,4 +1,4 @@
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#![feature(collections, core, env, libc, old_io, old_path, plugin)]
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#![feature(collections, core, env, libc, old_io, old_path, plugin, std_misc)]
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extern crate ansi_term;
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extern crate datetime;
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@ -27,6 +27,7 @@ pub mod filetype;
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pub mod options;
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pub mod output;
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pub mod term;
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pub mod attr;
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struct Exa<'a> {
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count: usize,
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@ -4,6 +4,7 @@ use column::Column;
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use column::Column::*;
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use output::{Grid, Details};
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use term::dimensions;
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use attr;
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use std::ascii::AsciiExt;
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use std::cmp::Ordering;
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@ -44,6 +45,11 @@ impl Options {
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/// Call getopts on the given slice of command-line strings.
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pub fn getopts(args: &[String]) -> Result<(Options, Vec<String>), Misfire> {
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let mut opts = getopts::Options::new();
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if attr::feature_implemented() {
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opts.optflag("@", "extended",
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"display extended attribute keys and sizes in long (-l) output"
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);
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}
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opts.optflag("1", "oneline", "display one entry per line");
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opts.optflag("a", "all", "show dot-files");
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opts.optflag("b", "binary", "use binary prefixes in file sizes");
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@ -220,6 +226,7 @@ impl View {
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columns: try!(Columns::deduce(matches)),
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header: matches.opt_present("header"),
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tree: matches.opt_present("recurse"),
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ext_attr: matches.opt_present("extended"),
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filter: filter,
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};
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@ -250,6 +257,9 @@ impl View {
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else if matches.opt_present("tree") {
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Err(Misfire::Useless("tree", false, "long"))
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}
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else if attr::feature_implemented() && matches.opt_present("extended") {
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Err(Misfire::Useless("extended", false, "long"))
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}
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else if matches.opt_present("oneline") {
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if matches.opt_present("across") {
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Err(Misfire::Useless("across", true, "oneline"))
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@ -552,6 +562,12 @@ mod test {
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assert_eq!(opts.unwrap_err(), Misfire::Useless("blocks", false, "long"))
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}
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#[test]
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fn extended_without_long() {
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let opts = Options::getopts(&[ "--extended".to_string() ]);
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assert_eq!(opts.unwrap_err(), Misfire::Useless("extended", false, "long"))
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}
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#[test]
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fn tree_without_recurse() {
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let opts = Options::getopts(&[ "--tree".to_string() ]);
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@ -1,4 +1,5 @@
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use column::{Column, Cell};
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use column::{Alignment, Column, Cell};
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use attr::Attribute;
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use dir::Dir;
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use file::{File, GREY};
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use options::{Columns, FileFilter};
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@ -12,6 +13,7 @@ pub struct Details {
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pub columns: Columns,
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pub header: bool,
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pub tree: bool,
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pub ext_attr: bool,
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pub filter: FileFilter,
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}
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@ -36,6 +38,7 @@ impl Details {
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cells: columns.iter().map(|c| Cell::paint(Plain.underline(), c.header())).collect(),
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name: Plain.underline().paint("Name").to_string(),
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last: false,
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attrs: Vec::new(),
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children: false,
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};
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@ -72,6 +75,17 @@ impl Details {
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}
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print!("{}\n", row.name);
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if self.ext_attr {
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let width = row.attrs.iter().map(|a| a.name().len()).max().unwrap_or(0);
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for attr in row.attrs.iter() {
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let name = attr.name();
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println!("{}\t{}",
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Alignment::Left.pad_string(name, width - name.len()),
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attr.size()
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)
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}
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}
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}
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}
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@ -83,6 +97,7 @@ impl Details {
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cells: columns.iter().map(|c| file.display(c, cache, locale)).collect(),
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name: file.file_name_view(),
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last: index == src.len() - 1,
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attrs: file.attrs.clone(),
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children: file.this.is_some(),
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};
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@ -92,7 +107,7 @@ impl Details {
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if let Some(ref dir) = file.this {
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let mut files = dir.files(true);
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self.filter.transform_files(&mut files);
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self.get_files(columns, cache, locale, dest, files.as_slice(), depth + 1);
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self.get_files(columns, cache, locale, dest, &files, depth + 1);
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}
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}
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}
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@ -104,6 +119,7 @@ struct Row {
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pub cells: Vec<Cell>,
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pub name: String,
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pub last: bool,
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pub attrs: Vec<Attribute>,
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pub children: bool,
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}
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