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756 lines
23 KiB
Rust
756 lines
23 KiB
Rust
// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use prelude::v1::*;
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use os::unix::prelude::*;
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use ffi::{CString, CStr, OsString, OsStr};
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use fmt;
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use io::{self, Error, ErrorKind, SeekFrom};
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use libc::{self, c_int, mode_t};
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use mem;
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use path::{Path, PathBuf};
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use ptr;
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use sync::Arc;
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use sys::fd::FileDesc;
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use sys::time::SystemTime;
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use sys::{cvt, cvt_r};
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use sys_common::{AsInner, FromInner};
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#[cfg(any(target_os = "linux", target_os = "emscripten"))]
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use libc::{stat64, fstat64, lstat64, off64_t, ftruncate64, lseek64, dirent64, readdir64_r, open64};
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#[cfg(target_os = "android")]
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use libc::{stat as stat64, fstat as fstat64, lstat as lstat64, off64_t, ftruncate64, lseek64,
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dirent as dirent64, open as open64};
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#[cfg(not(any(target_os = "linux",
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target_os = "emscripten",
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target_os = "android")))]
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use libc::{stat as stat64, fstat as fstat64, lstat as lstat64, off_t as off64_t,
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ftruncate as ftruncate64, lseek as lseek64, dirent as dirent64, open as open64};
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#[cfg(not(any(target_os = "linux",
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target_os = "emscripten",
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target_os = "solaris")))]
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use libc::{readdir_r as readdir64_r};
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pub struct File(FileDesc);
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#[derive(Clone)]
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pub struct FileAttr {
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stat: stat64,
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}
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pub struct ReadDir {
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dirp: Dir,
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root: Arc<PathBuf>,
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}
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struct Dir(*mut libc::DIR);
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unsafe impl Send for Dir {}
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unsafe impl Sync for Dir {}
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pub struct DirEntry {
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entry: dirent64,
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root: Arc<PathBuf>,
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// We need to store an owned copy of the directory name
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// on Solaris because a) it uses a zero-length array to
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// store the name, b) its lifetime between readdir calls
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// is not guaranteed.
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#[cfg(target_os = "solaris")]
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name: Box<[u8]>
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}
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#[derive(Clone)]
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pub struct OpenOptions {
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// generic
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read: bool,
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write: bool,
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append: bool,
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truncate: bool,
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create: bool,
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create_new: bool,
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// system-specific
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custom_flags: i32,
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mode: mode_t,
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}
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#[derive(Clone, PartialEq, Eq, Debug)]
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pub struct FilePermissions { mode: mode_t }
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#[derive(Copy, Clone, PartialEq, Eq, Hash)]
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pub struct FileType { mode: mode_t }
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pub struct DirBuilder { mode: mode_t }
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impl FileAttr {
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pub fn size(&self) -> u64 { self.stat.st_size as u64 }
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pub fn perm(&self) -> FilePermissions {
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FilePermissions { mode: (self.stat.st_mode as mode_t) & 0o777 }
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}
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pub fn file_type(&self) -> FileType {
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FileType { mode: self.stat.st_mode as mode_t }
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}
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}
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#[cfg(any(target_os = "ios", target_os = "macos"))]
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// FIXME: update SystemTime to store a timespec and don't lose precision
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impl FileAttr {
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pub fn modified(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::from(libc::timeval {
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tv_sec: self.stat.st_mtime,
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tv_usec: (self.stat.st_mtime_nsec / 1000) as libc::suseconds_t,
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}))
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}
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pub fn accessed(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::from(libc::timeval {
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tv_sec: self.stat.st_atime,
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tv_usec: (self.stat.st_atime_nsec / 1000) as libc::suseconds_t,
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}))
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}
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pub fn created(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::from(libc::timeval {
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tv_sec: self.stat.st_birthtime,
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tv_usec: (self.stat.st_birthtime_nsec / 1000) as libc::suseconds_t,
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}))
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}
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}
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#[cfg(target_os = "netbsd")]
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impl FileAttr {
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pub fn modified(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::from(libc::timespec {
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tv_sec: self.stat.st_mtime as libc::time_t,
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tv_nsec: self.stat.st_mtimensec as libc::c_long,
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}))
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}
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pub fn accessed(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::from(libc::timespec {
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tv_sec: self.stat.st_atime as libc::time_t,
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tv_nsec: self.stat.st_atimensec as libc::c_long,
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}))
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}
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pub fn created(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::from(libc::timespec {
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tv_sec: self.stat.st_birthtime as libc::time_t,
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tv_nsec: self.stat.st_birthtimensec as libc::c_long,
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}))
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}
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}
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#[cfg(not(any(target_os = "ios", target_os = "macos", target_os = "netbsd")))]
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impl FileAttr {
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pub fn modified(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::from(libc::timespec {
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tv_sec: self.stat.st_mtime as libc::time_t,
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tv_nsec: self.stat.st_mtime_nsec as libc::c_long,
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}))
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}
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pub fn accessed(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::from(libc::timespec {
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tv_sec: self.stat.st_atime as libc::time_t,
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tv_nsec: self.stat.st_atime_nsec as libc::c_long,
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}))
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}
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#[cfg(any(target_os = "bitrig",
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target_os = "freebsd",
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target_os = "openbsd"))]
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pub fn created(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::from(libc::timespec {
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tv_sec: self.stat.st_birthtime as libc::time_t,
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tv_nsec: self.stat.st_birthtime_nsec as libc::c_long,
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}))
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}
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#[cfg(not(any(target_os = "bitrig",
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target_os = "freebsd",
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target_os = "openbsd")))]
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pub fn created(&self) -> io::Result<SystemTime> {
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Err(io::Error::new(io::ErrorKind::Other,
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"creation time is not available on this platform \
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currently"))
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}
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}
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impl AsInner<stat64> for FileAttr {
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fn as_inner(&self) -> &stat64 { &self.stat }
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}
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impl FilePermissions {
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pub fn readonly(&self) -> bool { self.mode & 0o222 == 0 }
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pub fn set_readonly(&mut self, readonly: bool) {
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if readonly {
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self.mode &= !0o222;
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} else {
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self.mode |= 0o222;
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}
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}
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pub fn mode(&self) -> u32 { self.mode as u32 }
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}
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impl FileType {
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pub fn is_dir(&self) -> bool { self.is(libc::S_IFDIR) }
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pub fn is_file(&self) -> bool { self.is(libc::S_IFREG) }
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pub fn is_symlink(&self) -> bool { self.is(libc::S_IFLNK) }
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pub fn is(&self, mode: mode_t) -> bool { self.mode & libc::S_IFMT == mode }
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}
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impl FromInner<u32> for FilePermissions {
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fn from_inner(mode: u32) -> FilePermissions {
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FilePermissions { mode: mode as mode_t }
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}
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}
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impl Iterator for ReadDir {
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type Item = io::Result<DirEntry>;
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#[cfg(target_os = "solaris")]
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fn next(&mut self) -> Option<io::Result<DirEntry>> {
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unsafe {
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loop {
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// Although readdir_r(3) would be a correct function to use here because
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// of the thread safety, on Illumos the readdir(3C) function is safe to use
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// in threaded applications and it is generally preferred over the
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// readdir_r(3C) function.
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let entry_ptr = libc::readdir(self.dirp.0);
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if entry_ptr.is_null() {
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return None
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}
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let name = (*entry_ptr).d_name.as_ptr();
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let namelen = libc::strlen(name) as usize;
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let ret = DirEntry {
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entry: *entry_ptr,
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name: ::slice::from_raw_parts(name as *const u8,
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namelen as usize).to_owned().into_boxed_slice(),
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root: self.root.clone()
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};
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if ret.name_bytes() != b"." && ret.name_bytes() != b".." {
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return Some(Ok(ret))
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}
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}
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}
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}
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#[cfg(not(target_os = "solaris"))]
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fn next(&mut self) -> Option<io::Result<DirEntry>> {
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unsafe {
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let mut ret = DirEntry {
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entry: mem::zeroed(),
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root: self.root.clone()
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};
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let mut entry_ptr = ptr::null_mut();
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loop {
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if readdir64_r(self.dirp.0, &mut ret.entry, &mut entry_ptr) != 0 {
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return Some(Err(Error::last_os_error()))
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}
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if entry_ptr.is_null() {
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return None
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}
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if ret.name_bytes() != b"." && ret.name_bytes() != b".." {
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return Some(Ok(ret))
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}
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}
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}
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}
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}
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impl Drop for Dir {
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fn drop(&mut self) {
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let r = unsafe { libc::closedir(self.0) };
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debug_assert_eq!(r, 0);
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}
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}
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impl DirEntry {
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pub fn path(&self) -> PathBuf {
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self.root.join(OsStr::from_bytes(self.name_bytes()))
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}
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pub fn file_name(&self) -> OsString {
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OsStr::from_bytes(self.name_bytes()).to_os_string()
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}
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pub fn metadata(&self) -> io::Result<FileAttr> {
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lstat(&self.path())
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}
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#[cfg(target_os = "solaris")]
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pub fn file_type(&self) -> io::Result<FileType> {
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stat(&self.path()).map(|m| m.file_type())
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}
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#[cfg(not(target_os = "solaris"))]
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pub fn file_type(&self) -> io::Result<FileType> {
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match self.entry.d_type {
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libc::DT_CHR => Ok(FileType { mode: libc::S_IFCHR }),
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libc::DT_FIFO => Ok(FileType { mode: libc::S_IFIFO }),
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libc::DT_LNK => Ok(FileType { mode: libc::S_IFLNK }),
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libc::DT_REG => Ok(FileType { mode: libc::S_IFREG }),
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libc::DT_SOCK => Ok(FileType { mode: libc::S_IFSOCK }),
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libc::DT_DIR => Ok(FileType { mode: libc::S_IFDIR }),
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libc::DT_BLK => Ok(FileType { mode: libc::S_IFBLK }),
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_ => lstat(&self.path()).map(|m| m.file_type()),
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}
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}
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#[cfg(any(target_os = "macos",
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target_os = "ios",
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target_os = "linux",
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target_os = "emscripten",
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target_os = "android",
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target_os = "solaris"))]
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pub fn ino(&self) -> u64 {
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self.entry.d_ino as u64
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}
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#[cfg(any(target_os = "freebsd",
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target_os = "openbsd",
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target_os = "bitrig",
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target_os = "netbsd",
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target_os = "dragonfly"))]
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pub fn ino(&self) -> u64 {
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self.entry.d_fileno as u64
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}
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#[cfg(any(target_os = "macos",
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target_os = "ios",
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target_os = "netbsd",
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target_os = "openbsd",
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target_os = "freebsd",
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target_os = "dragonfly",
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target_os = "bitrig"))]
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fn name_bytes(&self) -> &[u8] {
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unsafe {
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::slice::from_raw_parts(self.entry.d_name.as_ptr() as *const u8,
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self.entry.d_namlen as usize)
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}
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}
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#[cfg(any(target_os = "android",
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target_os = "linux",
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target_os = "emscripten"))]
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fn name_bytes(&self) -> &[u8] {
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unsafe {
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CStr::from_ptr(self.entry.d_name.as_ptr()).to_bytes()
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}
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}
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#[cfg(target_os = "solaris")]
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fn name_bytes(&self) -> &[u8] {
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&*self.name
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}
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}
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impl OpenOptions {
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pub fn new() -> OpenOptions {
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OpenOptions {
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// generic
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read: false,
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write: false,
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append: false,
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truncate: false,
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create: false,
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create_new: false,
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// system-specific
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custom_flags: 0,
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mode: 0o666,
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}
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}
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pub fn read(&mut self, read: bool) { self.read = read; }
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pub fn write(&mut self, write: bool) { self.write = write; }
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pub fn append(&mut self, append: bool) { self.append = append; }
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pub fn truncate(&mut self, truncate: bool) { self.truncate = truncate; }
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pub fn create(&mut self, create: bool) { self.create = create; }
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pub fn create_new(&mut self, create_new: bool) { self.create_new = create_new; }
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pub fn custom_flags(&mut self, flags: i32) { self.custom_flags = flags; }
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pub fn mode(&mut self, mode: u32) { self.mode = mode as mode_t; }
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fn get_access_mode(&self) -> io::Result<c_int> {
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match (self.read, self.write, self.append) {
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(true, false, false) => Ok(libc::O_RDONLY),
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(false, true, false) => Ok(libc::O_WRONLY),
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(true, true, false) => Ok(libc::O_RDWR),
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(false, _, true) => Ok(libc::O_WRONLY | libc::O_APPEND),
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(true, _, true) => Ok(libc::O_RDWR | libc::O_APPEND),
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(false, false, false) => Err(Error::from_raw_os_error(libc::EINVAL)),
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}
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}
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fn get_creation_mode(&self) -> io::Result<c_int> {
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match (self.write, self.append) {
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(true, false) => {}
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(false, false) =>
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if self.truncate || self.create || self.create_new {
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return Err(Error::from_raw_os_error(libc::EINVAL));
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},
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(_, true) =>
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if self.truncate && !self.create_new {
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return Err(Error::from_raw_os_error(libc::EINVAL));
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},
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}
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Ok(match (self.create, self.truncate, self.create_new) {
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(false, false, false) => 0,
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(true, false, false) => libc::O_CREAT,
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(false, true, false) => libc::O_TRUNC,
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(true, true, false) => libc::O_CREAT | libc::O_TRUNC,
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(_, _, true) => libc::O_CREAT | libc::O_EXCL,
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})
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}
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}
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impl File {
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pub fn open(path: &Path, opts: &OpenOptions) -> io::Result<File> {
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let path = cstr(path)?;
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File::open_c(&path, opts)
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}
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pub fn open_c(path: &CStr, opts: &OpenOptions) -> io::Result<File> {
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let flags = libc::O_CLOEXEC |
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opts.get_access_mode()? |
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opts.get_creation_mode()? |
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(opts.custom_flags as c_int & !libc::O_ACCMODE);
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let fd = cvt_r(|| unsafe {
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open64(path.as_ptr(), flags, opts.mode as c_int)
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})?;
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let fd = FileDesc::new(fd);
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// Currently the standard library supports Linux 2.6.18 which did not
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// have the O_CLOEXEC flag (passed above). If we're running on an older
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// Linux kernel then the flag is just ignored by the OS, so we continue
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// to explicitly ask for a CLOEXEC fd here.
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//
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// The CLOEXEC flag, however, is supported on versions of OSX/BSD/etc
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// that we support, so we only do this on Linux currently.
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if cfg!(target_os = "linux") {
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fd.set_cloexec();
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}
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Ok(File(fd))
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}
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pub fn file_attr(&self) -> io::Result<FileAttr> {
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let mut stat: stat64 = unsafe { mem::zeroed() };
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cvt(unsafe {
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fstat64(self.0.raw(), &mut stat)
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})?;
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Ok(FileAttr { stat: stat })
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}
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pub fn fsync(&self) -> io::Result<()> {
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cvt_r(|| unsafe { libc::fsync(self.0.raw()) })?;
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Ok(())
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}
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pub fn datasync(&self) -> io::Result<()> {
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cvt_r(|| unsafe { os_datasync(self.0.raw()) })?;
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return Ok(());
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#[cfg(any(target_os = "macos", target_os = "ios"))]
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unsafe fn os_datasync(fd: c_int) -> c_int {
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libc::fcntl(fd, libc::F_FULLFSYNC)
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}
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#[cfg(target_os = "linux")]
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unsafe fn os_datasync(fd: c_int) -> c_int { libc::fdatasync(fd) }
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#[cfg(not(any(target_os = "macos",
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target_os = "ios",
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target_os = "linux")))]
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unsafe fn os_datasync(fd: c_int) -> c_int { libc::fsync(fd) }
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}
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pub fn truncate(&self, size: u64) -> io::Result<()> {
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cvt_r(|| unsafe {
|
|
ftruncate64(self.0.raw(), size as off64_t)
|
|
})?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
|
|
self.0.read(buf)
|
|
}
|
|
|
|
pub fn read_to_end(&self, buf: &mut Vec<u8>) -> io::Result<usize> {
|
|
self.0.read_to_end(buf)
|
|
}
|
|
|
|
pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
|
|
self.0.write(buf)
|
|
}
|
|
|
|
pub fn flush(&self) -> io::Result<()> { Ok(()) }
|
|
|
|
pub fn seek(&self, pos: SeekFrom) -> io::Result<u64> {
|
|
let (whence, pos) = match pos {
|
|
SeekFrom::Start(off) => (libc::SEEK_SET, off as off64_t),
|
|
SeekFrom::End(off) => (libc::SEEK_END, off as off64_t),
|
|
SeekFrom::Current(off) => (libc::SEEK_CUR, off as off64_t),
|
|
};
|
|
let n = cvt(unsafe { lseek64(self.0.raw(), pos, whence) })?;
|
|
Ok(n as u64)
|
|
}
|
|
|
|
pub fn duplicate(&self) -> io::Result<File> {
|
|
self.0.duplicate().map(File)
|
|
}
|
|
|
|
pub fn fd(&self) -> &FileDesc { &self.0 }
|
|
|
|
pub fn into_fd(self) -> FileDesc { self.0 }
|
|
}
|
|
|
|
impl DirBuilder {
|
|
pub fn new() -> DirBuilder {
|
|
DirBuilder { mode: 0o777 }
|
|
}
|
|
|
|
pub fn mkdir(&self, p: &Path) -> io::Result<()> {
|
|
let p = cstr(p)?;
|
|
cvt(unsafe { libc::mkdir(p.as_ptr(), self.mode) })?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn set_mode(&mut self, mode: u32) {
|
|
self.mode = mode as mode_t;
|
|
}
|
|
}
|
|
|
|
fn cstr(path: &Path) -> io::Result<CString> {
|
|
Ok(CString::new(path.as_os_str().as_bytes())?)
|
|
}
|
|
|
|
impl FromInner<c_int> for File {
|
|
fn from_inner(fd: c_int) -> File {
|
|
File(FileDesc::new(fd))
|
|
}
|
|
}
|
|
|
|
impl fmt::Debug for File {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
#[cfg(target_os = "linux")]
|
|
fn get_path(fd: c_int) -> Option<PathBuf> {
|
|
use string::ToString;
|
|
let mut p = PathBuf::from("/proc/self/fd");
|
|
p.push(&fd.to_string());
|
|
readlink(&p).ok()
|
|
}
|
|
|
|
#[cfg(target_os = "macos")]
|
|
fn get_path(fd: c_int) -> Option<PathBuf> {
|
|
// FIXME: The use of PATH_MAX is generally not encouraged, but it
|
|
// is inevitable in this case because OS X defines `fcntl` with
|
|
// `F_GETPATH` in terms of `MAXPATHLEN`, and there are no
|
|
// alternatives. If a better method is invented, it should be used
|
|
// instead.
|
|
let mut buf = vec![0;libc::PATH_MAX as usize];
|
|
let n = unsafe { libc::fcntl(fd, libc::F_GETPATH, buf.as_ptr()) };
|
|
if n == -1 {
|
|
return None;
|
|
}
|
|
let l = buf.iter().position(|&c| c == 0).unwrap();
|
|
buf.truncate(l as usize);
|
|
buf.shrink_to_fit();
|
|
Some(PathBuf::from(OsString::from_vec(buf)))
|
|
}
|
|
|
|
#[cfg(not(any(target_os = "linux", target_os = "macos")))]
|
|
fn get_path(_fd: c_int) -> Option<PathBuf> {
|
|
// FIXME(#24570): implement this for other Unix platforms
|
|
None
|
|
}
|
|
|
|
#[cfg(any(target_os = "linux", target_os = "macos"))]
|
|
fn get_mode(fd: c_int) -> Option<(bool, bool)> {
|
|
let mode = unsafe { libc::fcntl(fd, libc::F_GETFL) };
|
|
if mode == -1 {
|
|
return None;
|
|
}
|
|
match mode & libc::O_ACCMODE {
|
|
libc::O_RDONLY => Some((true, false)),
|
|
libc::O_RDWR => Some((true, true)),
|
|
libc::O_WRONLY => Some((false, true)),
|
|
_ => None
|
|
}
|
|
}
|
|
|
|
#[cfg(not(any(target_os = "linux", target_os = "macos")))]
|
|
fn get_mode(_fd: c_int) -> Option<(bool, bool)> {
|
|
// FIXME(#24570): implement this for other Unix platforms
|
|
None
|
|
}
|
|
|
|
let fd = self.0.raw();
|
|
let mut b = f.debug_struct("File");
|
|
b.field("fd", &fd);
|
|
if let Some(path) = get_path(fd) {
|
|
b.field("path", &path);
|
|
}
|
|
if let Some((read, write)) = get_mode(fd) {
|
|
b.field("read", &read).field("write", &write);
|
|
}
|
|
b.finish()
|
|
}
|
|
}
|
|
|
|
pub fn readdir(p: &Path) -> io::Result<ReadDir> {
|
|
let root = Arc::new(p.to_path_buf());
|
|
let p = cstr(p)?;
|
|
unsafe {
|
|
let ptr = libc::opendir(p.as_ptr());
|
|
if ptr.is_null() {
|
|
Err(Error::last_os_error())
|
|
} else {
|
|
Ok(ReadDir { dirp: Dir(ptr), root: root })
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn unlink(p: &Path) -> io::Result<()> {
|
|
let p = cstr(p)?;
|
|
cvt(unsafe { libc::unlink(p.as_ptr()) })?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn rename(old: &Path, new: &Path) -> io::Result<()> {
|
|
let old = cstr(old)?;
|
|
let new = cstr(new)?;
|
|
cvt(unsafe { libc::rename(old.as_ptr(), new.as_ptr()) })?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn set_perm(p: &Path, perm: FilePermissions) -> io::Result<()> {
|
|
let p = cstr(p)?;
|
|
cvt_r(|| unsafe { libc::chmod(p.as_ptr(), perm.mode) })?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn rmdir(p: &Path) -> io::Result<()> {
|
|
let p = cstr(p)?;
|
|
cvt(unsafe { libc::rmdir(p.as_ptr()) })?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn remove_dir_all(path: &Path) -> io::Result<()> {
|
|
let filetype = lstat(path)?.file_type();
|
|
if filetype.is_symlink() {
|
|
unlink(path)
|
|
} else {
|
|
remove_dir_all_recursive(path)
|
|
}
|
|
}
|
|
|
|
fn remove_dir_all_recursive(path: &Path) -> io::Result<()> {
|
|
for child in readdir(path)? {
|
|
let child = child?;
|
|
if child.file_type()?.is_dir() {
|
|
remove_dir_all_recursive(&child.path())?;
|
|
} else {
|
|
unlink(&child.path())?;
|
|
}
|
|
}
|
|
rmdir(path)
|
|
}
|
|
|
|
pub fn readlink(p: &Path) -> io::Result<PathBuf> {
|
|
let c_path = cstr(p)?;
|
|
let p = c_path.as_ptr();
|
|
|
|
let mut buf = Vec::with_capacity(256);
|
|
|
|
loop {
|
|
let buf_read = cvt(unsafe {
|
|
libc::readlink(p, buf.as_mut_ptr() as *mut _, buf.capacity() as libc::size_t)
|
|
})? as usize;
|
|
|
|
unsafe { buf.set_len(buf_read); }
|
|
|
|
if buf_read != buf.capacity() {
|
|
buf.shrink_to_fit();
|
|
|
|
return Ok(PathBuf::from(OsString::from_vec(buf)));
|
|
}
|
|
|
|
// Trigger the internal buffer resizing logic of `Vec` by requiring
|
|
// more space than the current capacity. The length is guaranteed to be
|
|
// the same as the capacity due to the if statement above.
|
|
buf.reserve(1);
|
|
}
|
|
}
|
|
|
|
pub fn symlink(src: &Path, dst: &Path) -> io::Result<()> {
|
|
let src = cstr(src)?;
|
|
let dst = cstr(dst)?;
|
|
cvt(unsafe { libc::symlink(src.as_ptr(), dst.as_ptr()) })?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn link(src: &Path, dst: &Path) -> io::Result<()> {
|
|
let src = cstr(src)?;
|
|
let dst = cstr(dst)?;
|
|
cvt(unsafe { libc::link(src.as_ptr(), dst.as_ptr()) })?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn stat(p: &Path) -> io::Result<FileAttr> {
|
|
let p = cstr(p)?;
|
|
let mut stat: stat64 = unsafe { mem::zeroed() };
|
|
cvt(unsafe {
|
|
stat64(p.as_ptr(), &mut stat as *mut _ as *mut _)
|
|
})?;
|
|
Ok(FileAttr { stat: stat })
|
|
}
|
|
|
|
pub fn lstat(p: &Path) -> io::Result<FileAttr> {
|
|
let p = cstr(p)?;
|
|
let mut stat: stat64 = unsafe { mem::zeroed() };
|
|
cvt(unsafe {
|
|
lstat64(p.as_ptr(), &mut stat as *mut _ as *mut _)
|
|
})?;
|
|
Ok(FileAttr { stat: stat })
|
|
}
|
|
|
|
pub fn canonicalize(p: &Path) -> io::Result<PathBuf> {
|
|
let path = CString::new(p.as_os_str().as_bytes())?;
|
|
let buf;
|
|
unsafe {
|
|
let r = libc::realpath(path.as_ptr(), ptr::null_mut());
|
|
if r.is_null() {
|
|
return Err(io::Error::last_os_error())
|
|
}
|
|
buf = CStr::from_ptr(r).to_bytes().to_vec();
|
|
libc::free(r as *mut _);
|
|
}
|
|
Ok(PathBuf::from(OsString::from_vec(buf)))
|
|
}
|
|
|
|
pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
|
|
use fs::{File, set_permissions};
|
|
if !from.is_file() {
|
|
return Err(Error::new(ErrorKind::InvalidInput,
|
|
"the source path is not an existing regular file"))
|
|
}
|
|
|
|
let mut reader = File::open(from)?;
|
|
let mut writer = File::create(to)?;
|
|
let perm = reader.metadata()?.permissions();
|
|
|
|
let ret = io::copy(&mut reader, &mut writer)?;
|
|
set_permissions(to, perm)?;
|
|
Ok(ret)
|
|
}
|