Fix UnsupportedOperation when using ptrace_* functions

1 files changed, 6 insertions, 4 deletions

diff --git a/src/sys/ptrace.rs b/src/sys/ptrace.rs
index bf395259..4c3d29b1 100644
--- a/src/sys/ptrace.rs
+++ b/src/sys/ptrace.rs
@@ -91,15 +91,16 @@ fn ptrace_peek(request: ptrace::PtraceRequest, pid: Pid, addr: *mut c_void, data
     }
 }
 
-/// Function for ptrace requests that return values from the data field. 
+/// Function for ptrace requests that return values from the data field.
 /// Some ptrace get requests populate structs or larger elements than c_long
 /// and therefore use the data field to return values. This function handles these
 /// requests.
 fn ptrace_get_data<T>(request: ptrace::PtraceRequest, pid: Pid) -> Result<T> {
-    // Creates an uninitialized pointer to store result in 
+    // Creates an uninitialized pointer to store result in
     let data: Box<T> = Box::new(unsafe { mem::uninitialized() });
     let data: *mut c_void = unsafe { mem::transmute(data) };
-    ptrace(request, pid, ptr::null_mut(), data)?;
+    let res = unsafe { ffi::ptrace(request, pid.into(), ptr::null_mut(), data) };
+    Errno::result(res)?;
     // Convert back into the original data format and return unboxed value
     let data: Box<T> = unsafe { mem::transmute(data) };
     Ok(*data)
@@ -114,7 +115,8 @@ pub fn ptrace_setoptions(pid: Pid, options: ptrace::PtraceOptions) -> Result<()>
     use self::ptrace::*;
     use std::ptr;
 
-    ptrace(PTRACE_SETOPTIONS, pid, ptr::null_mut(), options as *mut c_void).map(drop)
+    let res = unsafe { ffi::ptrace(PTRACE_SETOPTIONS, pid.into(), ptr::null_mut(), options as *mut c_void) };
+    Errno::result(res).map(|_| ())
 }
 
 /// Gets a ptrace event as described by `ptrace(PTRACE_GETEVENTMSG,...)`