SIGCHLD and wait4(), i.e. wait()/waitpid() implementation

2014-04-23 13:33:18 +09:00
parent 7103fed1dc
commit 0e348e6295
6 changed files with 315 additions and 14 deletions
--- a/executer/user/mcexec.c
+++ b/executer/user/mcexec.c
@@ -1156,6 +1156,19 @@ int main_loop(int fd, int cpu, pthread_mutex_t *lock)
 			break;
 		}

+		case __NR_wait4: {
+			int status;
+			int ret;
+			pid_t pid = w.sr.args[0];
+
+			if ((ret = waitpid(pid, &status, 0)) != pid) {
+				fprintf(stderr, "ERROR: waiting for %lu\n", w.sr.args[0]);
+			}
+
+			do_syscall_return(fd, cpu, ret, 0, 0, 0, 0);
+			break;
+		}
+
 		default:
 			 ret = do_generic_syscall(&w);
 			 do_syscall_return(fd, cpu, ret, 0, 0, 0, 0);