support more OSes

Author: Qelxiros

library/std/src/sys/process/unix/fuchsia.rs

@@ -152,6 +152,11 @@ impl Process {
         Ok(())
     }
 
+    pub fn send_signal(&mut self) -> io::Result<()> {
+        // Fuchsia doesn't have a direct equivalent for signals
+        unimplemented!()
+    }
+
     pub fn wait(&mut self) -> io::Result<ExitStatus> {
         let mut proc_info: zx_info_process_t = Default::default();
         let mut actual: size_t = 0;

library/std/src/sys/process/unix/unsupported.rs

@@ -44,6 +44,10 @@ impl Process {
         unsupported()
     }
 
+    pub fn send_signal(&mut self) -> io::Result<()> {
+        unsupported()
+    }
+
     pub fn wait(&mut self) -> io::Result<ExitStatus> {
         unsupported()
     }

library/std/src/sys/process/unix/vxworks.rs

@@ -147,13 +147,17 @@ impl Process {
     }
 
     pub fn kill(&mut self) -> io::Result<()> {
+        self.send_signal(libc::SIGKILL)
+    }
+
+    pub fn send_signal(&mut self, signal: i32) -> io::Result<()> {
         // If we've already waited on this process then the pid can be recycled
         // and used for another process, and we probably shouldn't be killing
         // random processes, so return Ok because the process has exited already.
         if self.status.is_some() {
             Ok(())
         } else {
-            cvt(unsafe { libc::kill(self.pid, libc::SIGKILL) }).map(drop)
+            cvt(unsafe { libc::kill(self.pid, signal) }).map(drop)
         }
     }