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#[cfg(all(not(target_os = "windows"), not(target_os = "unknown")))]
use std::fs;
#[cfg(all(not(target_os = "windows"), not(target_os = "unknown")))]
use std::path::{Path, PathBuf};
#[cfg(all(not(target_os = "windows"), not(target_os = "unknown")))]
use std::ffi::OsStr;
#[cfg(all(not(target_os = "windows"), not(target_os = "unknown")))]
use std::os::unix::ffi::OsStrExt;
#[cfg(all(not(target_os = "windows"), not(target_os = "unknown")))]
use libc::{c_char, lstat, stat, S_IFLNK, S_IFMT};
use Pid;
#[cfg(all(not(target_os = "windows"), not(target_os = "unknown")))]
pub fn realpath(original: &Path) -> PathBuf {
use std::mem::MaybeUninit;
fn and(x: u32, y: u32) -> u32 {
x & y
}
if let Some(original_str) = original.to_str() {
let ori = Path::new(original_str);
if cfg!(windows) {
return PathBuf::from(ori);
}
let result = PathBuf::from(original);
let mut result_s = result.to_str().unwrap_or("").as_bytes().to_vec();
result_s.push(0);
let mut buf = MaybeUninit::<stat>::uninit();
let res = unsafe { lstat(result_s.as_ptr() as *const c_char, buf.as_mut_ptr()) };
let buf = unsafe { buf.assume_init() };
if res < 0 || and(buf.st_mode.into(), S_IFMT.into()) != S_IFLNK.into() {
PathBuf::new()
} else {
match fs::read_link(&result) {
Ok(f) => f,
Err(_) => PathBuf::new(),
}
}
} else {
PathBuf::new()
}
}
#[cfg(all(not(target_os = "windows"), not(target_os = "unknown")))]
pub fn to_cpath(path: &Path) -> Vec<u8> {
let path_os: &OsStr = path.as_ref();
let mut cpath = path_os.as_bytes().to_vec();
cpath.push(0);
cpath
}
pub fn get_current_pid() -> Result<Pid, &'static str> {
cfg_if! {
if #[cfg(all(not(target_os = "windows"), not(target_os = "unknown")))] {
fn inner() -> Result<Pid, &'static str> {
unsafe { Ok(::libc::getpid()) }
}
} else if #[cfg(target_os = "windows")] {
fn inner() -> Result<Pid, &'static str> {
use winapi::um::processthreadsapi::GetCurrentProcessId;
unsafe { Ok(GetCurrentProcessId() as Pid) }
}
} else if #[cfg(target_os = "unknown")] {
fn inner() -> Result<Pid, &'static str> {
Err("Unavailable on this platform")
}
} else {
fn inner() -> Result<Pid, &'static str> {
Err("Unknown platform")
}
}
}
inner()
}