From 1fa6f6bfb08023c9f1b0a5c0c12e6ddffa1e7385 Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Sun, 17 Nov 2019 19:04:28 -0800
Subject: [PATCH] ptrace: add ptrace::seize for Linux

---
 src/sys/ptrace/linux.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/sys/ptrace/linux.rs b/src/sys/ptrace/linux.rs
index b2b984c36b..ffe23d7170 100644
--- a/src/sys/ptrace/linux.rs
+++ b/src/sys/ptrace/linux.rs
@@ -315,6 +315,21 @@ pub fn attach(pid: Pid) -> Result<()> {
     }
 }
 
+/// Attach to a running process, as with `ptrace(PTRACE_SEIZE, ...)`
+///
+/// Attaches to the process specified in pid, making it a tracee of the calling process.
+#[cfg(all(target_os = "linux", not(any(target_arch = "mips", target_arch = "mips64"))))]
+pub fn seize(pid: Pid, options: Options) -> Result<()> {
+    unsafe {
+        ptrace_other(
+            Request::PTRACE_SEIZE,
+            pid,
+            ptr::null_mut(),
+            options.bits() as *mut c_void,
+        ).map(drop) // ignore the useless return value
+    }
+}
+
 /// Detaches the current running process, as with `ptrace(PTRACE_DETACH, ...)`
 ///
 /// Detaches from the process specified in pid allowing it to run freely