diff -up sudo-1.8.6p3/plugins/sudoers/def_data.c.nowaitopt sudo-1.8.6p3/plugins/sudoers/def_data.c
--- sudo-1.8.6p3/plugins/sudoers/def_data.c.nowaitopt	2012-09-26 14:05:10.088862635 +0200
+++ sudo-1.8.6p3/plugins/sudoers/def_data.c	2012-09-26 13:36:07.750215749 +0200
@@ -351,6 +351,10 @@ struct sudo_defs_types sudo_defs_table[]
 	N_("Set of limit privileges"),
 	NULL,
     }, {
+        "cmnd_no_wait", T_FLAG,
+        N_("Don't fork and wait for the command to finish, just exec it"),
+        NULL,
+    }, {
 	NULL, 0, NULL
     }
 };
diff -up sudo-1.8.6p3/plugins/sudoers/def_data.h.nowaitopt sudo-1.8.6p3/plugins/sudoers/def_data.h
--- sudo-1.8.6p3/plugins/sudoers/def_data.h.nowaitopt	2012-09-26 14:05:03.280859958 +0200
+++ sudo-1.8.6p3/plugins/sudoers/def_data.h	2012-09-26 13:37:05.320329089 +0200
@@ -162,6 +162,8 @@
 #define I_PRIVS                 80
 #define def_limitprivs          (sudo_defs_table[81].sd_un.str)
 #define I_LIMITPRIVS            81
+#define def_cmnd_no_wait        (sudo_defs_table[82].sd_un.flag)
+#define I_CMND_NO_WAIT          82
 
 enum def_tuple {
 	never,
diff -up sudo-1.8.6p3/plugins/sudoers/sudoers.c.nowaitopt sudo-1.8.6p3/plugins/sudoers/sudoers.c
--- sudo-1.8.6p3/plugins/sudoers/sudoers.c.nowaitopt	2012-09-26 14:04:47.223854171 +0200
+++ sudo-1.8.6p3/plugins/sudoers/sudoers.c	2012-09-26 13:39:05.590552887 +0200
@@ -689,6 +689,8 @@ sudoers_policy_main(int argc, char * con
 	command_info[info_len++] = estrdup("set_utmp=true");
     if (def_use_pty)
 	command_info[info_len++] = estrdup("use_pty=true");
+    if (def_cmnd_no_wait)
+	command_info[info_len++] = estrdup("cmnd_no_wait=true");
     if (def_utmp_runas)
 	command_info[info_len++] = fmt_string("utmp_user", runas_pw->pw_name);
 #ifdef HAVE_LOGIN_CAP_H
diff -up sudo-1.8.6p3/src/exec.c.nowaitopt sudo-1.8.6p3/src/exec.c
--- sudo-1.8.6p3/src/exec.c.nowaitopt	2012-09-26 14:06:08.505887008 +0200
+++ sudo-1.8.6p3/src/exec.c	2012-09-26 13:29:19.786240447 +0200
@@ -281,6 +281,45 @@ sudo_execute(struct command_details *det
     }
 
     /*
+     * If we don't want to wait for the command to exit, then just exec it.
+     * THIS WILL BREAK SEVERAL THINGS including SELinux, PAM sessions and I/O
+     * logging. Implemented because of rhbz#840980 (backwards compatibility).
+     * In 1.8.x branch this is even harder to get back, since the nowait code
+     * was completely removed.
+     */
+    if (details->flags & CD_DONTWAIT) {
+        if (exec_setup(details, NULL, -1) == true) {
+            /* headed for execve() */
+            sudo_debug_execve(SUDO_DEBUG_INFO, details->command,
+                              details->argv, details->envp);
+            if (details->closefrom >= 0) {
+                int maxfd = details->closefrom;
+                dup2(sv[1], maxfd);
+                (void)fcntl(maxfd, F_SETFD, FD_CLOEXEC);
+                sv[1] = maxfd++;
+                if (sudo_debug_fd_set(maxfd) != -1)
+                    maxfd++;
+                closefrom(maxfd);
+            }
+#ifdef HAVE_SELINUX
+            if (ISSET(details->flags, CD_RBAC_ENABLED)) {
+                selinux_execve(details->command, details->argv, details->envp,
+                               ISSET(details->flags, CD_NOEXEC));
+            } else
+#endif
+            {
+                sudo_execve(details->command, details->argv, details->envp,
+                            ISSET(details->flags, CD_NOEXEC));
+            }
+            sudo_debug_printf(SUDO_DEBUG_ERROR, "unable to exec %s: %s",
+                              details->command, strerror(errno));
+        }
+        cstat->type = CMD_ERRNO;
+        cstat->val = errno;
+	return 127;
+    }
+    
+    /*
      * We communicate with the child over a bi-directional pair of sockets.
      * Parent sends signal info to child and child sends back wait status.
      */
diff -up sudo-1.8.6p3/src/sudo.c.nowaitopt sudo-1.8.6p3/src/sudo.c
--- sudo-1.8.6p3/src/sudo.c.nowaitopt	2012-09-26 14:06:25.504894811 +0200
+++ sudo-1.8.6p3/src/sudo.c	2012-09-26 13:33:34.306889223 +0200
@@ -552,6 +552,11 @@ command_info_to_details(char * const inf
 		    }
 		    break;
 		}
+		if (strncmp("cmnd_no_wait=", info[i], sizeof("cmnd_no_wait=") - 1) == 0) {
+		    if (atobool(info[i] + sizeof("cmnd_no_wait=") - 1) == true)
+			SET(details->flags, CD_DONTWAIT);
+		    break;
+		}
 		break;
 	    case 'l':
 		SET_STRING("login_class=", login_class)
diff -up sudo-1.8.6p3/src/sudo.h.nowaitopt sudo-1.8.6p3/src/sudo.h
--- sudo-1.8.6p3/src/sudo.h.nowaitopt	2012-09-26 14:06:20.856892631 +0200
+++ sudo-1.8.6p3/src/sudo.h	2012-09-26 13:19:11.697482212 +0200
@@ -131,6 +131,7 @@ struct user_details {
 #define CD_USE_PTY		0x1000
 #define CD_SET_UTMP		0x2000
 #define CD_SUDOEDIT_COPY	0x4000
+#define CD_DONTWAIT		0x8000
 
 struct command_details {
     uid_t uid;