Provide IRT process interface

src/untrusted/nacl/kill.c

Index: src/untrusted/nacl/kill.c
diff --git a/src/untrusted/nacl/fchmod.c b/src/untrusted/nacl/kill.c
similarity index 61%
copy from src/untrusted/nacl/fchmod.c
copy to src/untrusted/nacl/kill.c
index eea6b936d0ff95a8efa03fabbbdcfa1e26a9dc0f..b8553956ee51094254c6cddbe06d8e8123e511ff 100644
--- a/src/untrusted/nacl/fchmod.c
+++ b/src/untrusted/nacl/kill.c
@@ -5,18 +5,18 @@
  */
 
 #include <errno.h>
-#include <sys/stat.h>
+#include <signal.h>
 #include <sys/types.h>
 
 #include "native_client/src/untrusted/nacl/nacl_irt.h"
 
-int fchmod(int fd, mode_t mode) {
-  if (!__libnacl_irt_init_fn(&__libnacl_irt_dev_fdio.fchmod,
-                             __libnacl_irt_dev_fdio_init)) {
+int kill(pid_t pid, int sig) {
+  if (!__libnacl_irt_init_fn(&__libnacl_irt_dev_process.kill,
+                             __libnacl_irt_dev_process_init)) {
     return -1;
   }
 
-  int error = __libnacl_irt_dev_fdio.fchmod(fd, mode);
+  int error = __libnacl_irt_dev_process.kill(pid, sig);
   if (error) {
     errno = error;
     return -1;