Some more enhancements to test0

- Only the topmost parent prints pass messages. Any failed child can print fail message.
- Added testing of 16 forked threads doing file create/read/write/close and
  16 forked x 4 cloned = 64 threads spawning/exiting

tasks/fs0/main.c

@@ -135,7 +135,7 @@ void handle_fs_requests(void)
 
 void main(void)
 {
-	printf("\n%s: Started with thread id: %d\n", __TASKNAME__, self_tid());
+	printf("\n%s: Started with thread id %d\n", __TASKNAME__, self_tid());
 
 	initialise();
 

tasks/libposix/open.c

@@ -36,7 +36,8 @@ static inline int l4_open(const char *pathname, int flags, mode_t mode)
 	}
 	/* Check if syscall itself was successful */
 	if ((fd = l4_get_retval()) < 0) {
-		printf("%s: OPEN Error: %d.\n", __FUNCTION__, fd);
+		printf("%s: OPEN Error: %d, for path %s\n",
+		       __FUNCTION__, fd, pathname);
 		return fd;
 	}
 	return fd;

tasks/mm0/main.c

@@ -239,7 +239,7 @@ int self_spawn(void)
 
 void main(void)
 {
-	printf("\n%s: Started with thread id: %d\n", __TASKNAME__, self_tid());
+	printf("\n%s: Started with thread id %d\n", __TASKNAME__, self_tid());
 
 	/* Initialise the memory, server tasks, mmap and start them. */
 	initialise();

tasks/test0/include/tests.h

@@ -3,13 +3,15 @@
 
 #define __TASKNAME__			"test0"
 
-// #define TEST_VERBOSE_PRINT
+//#define TEST_VERBOSE_PRINT
 #if defined (TEST_VERBOSE_PRINT)
 #define test_printf(...)	printf(__VA_ARGS__)
 #else
 #define test_printf(...)
 #endif
 
+#include <sys/types.h>
+extern pid_t parent_of_all;
 
 int shmtest(void);
 int forktest(void);

tasks/test0/main.c

@@ -24,22 +24,24 @@ void wait_pager(l4id_t partner)
 
 void main(void)
 {
-	printf("\n%s: Started with tid %d.\n", __TASKNAME__, self_tid());
+	printf("\n%s: Started with thread id %d\n", __TASKNAME__, self_tid());
 
 	wait_pager(0);
 
-	dirtest();
+	printf("%s: Running POSIX API tests.\n", __TASKNAME__);
 
-	// exectest();
+	dirtest();
 
 	mmaptest();
 
-	fileio();
-
 	forktest();
 
+	fileio();
+
 	clonetest();
 
+	// exectest();
+
 	while (1)
 		wait_pager(0);
 }

tasks/test0/src/clonetest.c

@@ -11,6 +11,8 @@
 
 int clone_global = 0;
 
+extern pid_t parent_of_all;
+
 int my_thread_func(void *arg)
 {
 	for (int i = 0; i < 25; i++)
@@ -46,7 +48,9 @@ int clonetest(void)
 
 	/* TODO: Add wait() or something similar and check that global is 100 */
 
-	printf("CLONE TEST     -- PASSED --\n");
+	if (getpid() == parent_of_all)
+		printf("CLONE TEST     -- PASSED --\n");
+
 	return 0;
 out_err:
 	printf("CLONE TEST     -- FAILED --\n");

tasks/test0/src/fileio.c

@@ -61,7 +61,8 @@ int fileio(void)
 		goto out_err;
 	}
 
-	printf("FILE IO TEST   -- PASSED --\n");
+	if (getpid() == parent_of_all)
+		printf("FILE IO TEST   -- PASSED --\n");
 	return 0;
 
 out_err:

tasks/test0/src/forktest.c

@@ -10,12 +10,13 @@
 
 int global = 0;
 
-static pid_t pid;
+pid_t parent_of_all;
 
 int forktest(void)
 {
 	pid_t myid;
-	pid_t parent = getpid();
+
+	parent_of_all = getpid();
 
 	/* 16 forks */
 	for (int i = 0; i < 4; i++)
@@ -23,7 +24,7 @@ int forktest(void)
 			goto out_err;
 
 	myid = getpid();
-	pid = myid;
+
 	if (global != 0) {
 		test_printf("Global not zero.\n");
 		test_printf("-- FAILED --\n");
@@ -35,14 +36,15 @@ int forktest(void)
 		goto out_err;
 
 
-	if (getpid() != parent) {
-		/* Successful childs return here */
-		_exit(0);
-		BUG();
+	if (getpid() != parent_of_all) {
+		/* Exit here to exit successful children */
+		//_exit(0);
+		//BUG();
 	}
 
-	/* Parent of all comes here if successful */
-	printf("FORK TEST      -- PASSED --\n");
+	if (getpid() == parent_of_all)
+		printf("FORK TEST      -- PASSED --\n");
+
 	return 0;
 
 	/* Any erroneous child or parent comes here */

tasks/test0/src/mmaptest.c

@@ -23,7 +23,7 @@ int mmaptest(void)
 	void *base;
 	int x = 0x1000;
 
-	if ((fd = open("./newfile3.txt", O_CREAT | O_TRUNC | O_RDWR, S_IRWXU)) < 0)
+	if ((fd = open("./mmapfile.txt", O_CREAT | O_TRUNC | O_RDWR, S_IRWXU)) < 0)
 		goto out_err;
 
 	/* Extend the file */