1 files changed, 68 insertions, 0 deletions
diff --git a/third_party/rust/goblin/examples/lipo.rs b/third_party/rust/goblin/examples/lipo.rs
new file mode 100644
index 0000000000..72cf7a5107
--- /dev/null
+++ b/third_party/rust/goblin/examples/lipo.rs
@@ -0,0 +1,68 @@
+use goblin::mach::{self, Mach};
+use std::env;
+use std::process;
+use std::path::Path;
+use std::fs::File;
+use std::io::{Read, Write};
+
+fn usage() -> ! {
+    println!("usage: lipo <options> <mach-o fat file>");
+    println!("    -m64              Extracts and writes the 64-bit binary in this fat container, if any");
+    process::exit(1);
+}
+
+fn main () {
+    let len = env::args().len();
+
+    if len <= 1 {
+        usage();
+    } else {
+        let mut m64 = false;
+        {
+            let mut flags = env::args().collect::<Vec<_>>();
+            flags.pop();
+            flags.remove(0);
+            for option in flags {
+                match option.as_str() {
+                    "-m64" => { m64 = true }
+                    other => {
+                        println!("unknown flag: {}", other);
+                        println!();
+                        usage();
+                    }
+                }
+            }
+        }
+
+        let path_name = env::args_os().last().unwrap();
+        let path = Path::new(&path_name);
+        let buffer = { let mut v = Vec::new(); let mut f = File::open(&path).unwrap(); f.read_to_end(&mut v).unwrap(); v};
+        match mach::Mach::parse(&buffer) {
+            Ok(Mach::Binary(_macho)) => {
+                println!("Already a single arch binary");
+                process::exit(2);
+            },
+            Ok(Mach::Fat(fat)) => {
+                for (i, arch) in fat.iter_arches().enumerate() {
+                    let arch = arch.unwrap();
+                    let name = format!("{}.{}", &path_name.to_string_lossy(), i);
+                    let path = Path::new(&name);
+                    if arch.is_64() && m64 {
+                        let bytes = &buffer[arch.offset as usize..][..arch.size as usize];
+                        let mut file = File::create(path).unwrap();
+                        file.write_all(bytes).unwrap();
+                        break;
+                    } else if !m64 {
+                        let bytes = &buffer[arch.offset as usize..][..arch.size as usize];
+                        let mut file = File::create(path).unwrap();
+                        file.write_all(bytes).unwrap();
+                    }
+                }
+            },
+            Err(err) => {
+                println!("err: {:?}", err);
+                process::exit(2);
+            }
+        }
+    }
+}