install: support reflink

.vscode/cspell.dictionaries/workspace.wordlist.txt

@@ -363,6 +363,7 @@ uutils
 sendfile
 execfn
 fadvise
+ficlone
 fstatfs
 getcwd
 mkfifoat

src/uu/cp/src/cp.rs

@@ -2,7 +2,7 @@
 //
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
-// spell-checker:ignore (ToDO) copydir ficlone fiemap ftruncate linkgs lstat nlink nlinks pathbuf pwrite reflink strs xattrs symlinked deduplicated advcpmv nushell IRWXG IRWXO IRWXU IRWXUGO IRWXU IRWXG IRWXO IRWXUGO sflag
+// spell-checker:ignore (ToDO) copydir fiemap ftruncate linkgs lstat nlink nlinks pathbuf pwrite reflink strs xattrs symlinked deduplicated advcpmv nushell IRWXG IRWXO IRWXU IRWXUGO IRWXU IRWXG IRWXO IRWXUGO sflag
 
 use std::cmp::Ordering;
 use std::collections::{HashMap, HashSet};

src/uu/cp/src/platform/linux.rs

@@ -2,7 +2,7 @@
 //
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
-// spell-checker:ignore ficlone reflink ftruncate pwrite fiemap lseek nofollow
+// spell-checker:ignore reflink ftruncate pwrite fiemap lseek nofollow
 
 use rustix::fs::{SeekFrom, ftruncate, ioctl_ficlone, seek};
 use std::io::Read;

src/uu/install/Cargo.toml

@@ -34,6 +34,7 @@ uucore = { workspace = true, default-features = true, features = [
 fluent = { workspace = true }
 
 [target.'cfg(any(target_os = "linux", target_os = "android"))'.dependencies]
+rustix = { workspace = true }
 selinux = { workspace = true, optional = true }
 
 [features]

src/uu/install/src/install.rs

@@ -1032,6 +1032,11 @@ fn copy_file(from: &Path, to: &Path) -> UResult<()> {
         .mode(0o600)
         .open(to)?;
 
+    #[cfg(any(target_os = "linux", target_os = "android"))]
+    if rustix::fs::ioctl_ficlone(&dest, &handle).is_ok() {
+        return Ok(());
+    }
+
     copy_fast(&mut handle, &mut dest).map_err(|err| {
         InstallError::InstallFailed(from.to_path_buf(), to.to_path_buf(), err.to_string())
     })?;