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Rollup merge of #98211 - devnexen:get_path_freebsd, r=Mark-Simulacrum

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Implement `fs::get_path` for FreeBSD.

Using `F_KINFO` fcntl flag, the kf_structsize field
needs to be set beforehand for that effect.
This commit is contained in:
Yuki Okushi 2022-07-26 13:12:18 +09:00 committed by GitHub
commit d3acd0069d
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1 changed files with 14 additions and 0 deletions
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14
library/std/src/sys/unix/fs.rs
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@ -1126,6 +1126,19 @@ impl fmt::Debug for File {
Some(PathBuf::from(OsString::from_vec(buf)))
}
#[cfg(all(target_os = "freebsd", target_arch = "x86_64"))]
fn get_path(fd: c_int) -> Option<PathBuf> {
let info = Box::<libc::kinfo_file>::new_zeroed();
let mut info = unsafe { info.assume_init() };
info.kf_structsize = mem::size_of::<libc::kinfo_file>() as libc::c_int;
let n = unsafe { libc::fcntl(fd, libc::F_KINFO, &mut *info) };
if n == -1 {
return None;
}
let buf = unsafe { CStr::from_ptr(info.kf_path.as_mut_ptr()).to_bytes().to_vec() };
Some(PathBuf::from(OsString::from_vec(buf)))
}
#[cfg(target_os = "vxworks")]
fn get_path(fd: c_int) -> Option<PathBuf> {
let mut buf = vec![0; libc::PATH_MAX as usize];
@ -1142,6 +1155,7 @@ impl fmt::Debug for File {
target_os = "linux",
target_os = "macos",
target_os = "vxworks",
all(target_os = "freebsd", target_arch = "x86_64"),
target_os = "netbsd"
)))]
fn get_path(_fd: c_int) -> Option<PathBuf> {