newlib: tests for sigchld

qa/lib/newlib/200-signals.c

@@ -4,13 +4,40 @@
 #include <signal.h>
 #include <sys/wait.h>
 
-void sighup(); /* routines child will call upon sigtrap */
-void sigint();
-void sigquit();
+int child, cstatus;
+
+void sighup() {
+	signal(SIGHUP,sighup); /* reset signal */
+	printf("CHILD: I have received a SIGHUP\n");
+}
+
+void sigint() {
+	signal(SIGINT,sigint); /* reset signal */
+	printf("CHILD: I have received a SIGINT\n");
+}
+
+void sigquit() {
+	printf("My DADDY has Killed me!!!\n");
+	exit(0);
+}
+
+void sigchld() {
+	printf("PARENT: got SIGCHLD\n");
+#ifdef WITH_SIGCHLD
+	child = wait(&cstatus);
+	if(cstatus == 0)
+		exit(0);
+	else
+	{
+		printf("PARENT: child exited with status %d\n", cstatus);
+		exit(1);
+	}
+#endif
+}
 
 int
 main() { 
-	int pid, p[2], child, cstatus;
+	int pid, p[2];
 	char dummy[1];
 
 	/* get child process */
@@ -37,6 +64,7 @@ main() {
 	}
 	else /* parent */
 	{
+		signal(SIGCHLD,sigchld);
 		close(p[1]);
 		if(read(p[0], &dummy, 1) > 0){
 			printf("sync read received data");
@@ -51,6 +79,11 @@ main() {
 		sleep(3); /* pause for 3 secs */
 		printf("\nPARENT: sending SIGQUIT\n\n");
 		kill(pid,SIGQUIT);
+
+#ifdef WITH_SIGCHLD
+		sleep(10000);
+		exit(1);
+#else
 		child = wait(&cstatus);
 		if(child == pid && cstatus == 0)
 			exit(0);
@@ -59,20 +92,6 @@ main() {
 			printf("PARENT: child exited with status %d\n", cstatus);
 			exit(1);
 		}
+#endif
 	}
 }
-
-void sighup() {
-	signal(SIGHUP,sighup); /* reset signal */
-	printf("CHILD: I have received a SIGHUP\n");
-}
-
-void sigint() {
-	signal(SIGINT,sigint); /* reset signal */
-	printf("CHILD: I have received a SIGINT\n");
-}
-
-void sigquit() {
-	printf("My DADDY has Killed me!!!\n");
-	exit(0);
-}

qa/lib/newlib/build.json

@@ -54,6 +54,7 @@
 			"/arch/$ARCH/lib/newlib/libg.a",
 			"-I", "/sys/posix/newlib",
 			"-O2",
+			"-DWITH_SIGCHLD",
 			"-std=gnu11"
 		],
 		"Oflags": [

qa/lib/newlib/libposix_sigchld.c

@@ -0,0 +1,45 @@
+/*
+ * This file is part of Jehanne.
+ *
+ * Copyright (C) 2017 Giacomo Tesio <giacomo@tesio.it>
+ *
+ * This is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * Jehanne is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <u.h>
+#include <libc.h>
+#include <posix.h>
+
+static char*
+qa_exit_translator(int status)
+{
+	if(jehanne_getpid() == jehanne_getmainpid()){
+		/* the QA test may fork, but only the main process
+		 * should return PASS/FAIL
+		 */
+		if(status == 0){
+			jehanne_print("PASS\n");
+			return "PASS";
+		} else {
+			jehanne_print("FAIL: " __POSIX_EXIT_PREFIX "%d\n", status);
+			return "FAIL";
+		}
+	}
+	return nil;
+}
+
+void
+__application_newlib_init(void)
+{
+	libposix_translate_exit_status(qa_exit_translator);
+	libposix_emulate_SIGCHLD();
+}