test:update tests to fix compiler warnings.

Change-Id: Id2c757f61fe5e8b52dffadfeb129024625c76f48

test/t40c.c

@@ -68,7 +68,6 @@ void open_terminal(int *child_fd, int *parent_fd) {
 }
 
 int do_child(int terminal) {
-  int retval;
   struct timeval tv;
 
   /* Going to sleep for two seconds to allow the parent proc to get ready */
@@ -77,12 +76,12 @@ int do_child(int terminal) {
   select(0, NULL, NULL, NULL, &tv);
 
   /* Try to write. Doesn't matter how many bytes we actually send. */
-  retval = write(terminal, SENDSTRING, strlen(SENDSTRING));
+  (void) write(terminal, SENDSTRING, strlen(SENDSTRING));
   close(terminal);
 
   /* Wait for another second to allow the parent to process incoming data */
   tv.tv_usec = 1000000;
-  retval = select(0,NULL, NULL, NULL, &tv);
+  (void) select(0,NULL, NULL, NULL, &tv);
   exit(0);
 }
 

test/t40d.c

@@ -61,7 +61,6 @@ void e(int n, char *s) {
 
 void do_child(void) {
   struct timeval tv;
-  int retval;
  
   /* Open named pipe for writing. This will block until a reader arrives. */
   if((fd_np1 = open(NAMEDPIPE1, O_WRONLY)) == -1) {
@@ -79,19 +78,19 @@ void do_child(void) {
   select(0, NULL, NULL, NULL, &tv);
 
   /* Try to write. Doesn't matter how many bytes we actually send. */
-  retval = write(fd_np1, SENDSTRING, strlen(SENDSTRING));
+  (void) write(fd_np1, SENDSTRING, strlen(SENDSTRING));
 
   /* Wait for another second to allow the parent to process incoming data */
   tv.tv_sec = DO_HANDLEDATA;
   tv.tv_usec = 0;
-  retval = select(0,NULL, NULL, NULL, &tv);
+  (void) select(0,NULL, NULL, NULL, &tv);
 
   close(fd_np1);
 
   /* Wait for another second to allow the parent to process incoming data */
   tv.tv_sec = DO_HANDLEDATA;
   tv.tv_usec = 0;
-  retval = select(0,NULL, NULL, NULL, &tv);
+  (void) select(0,NULL, NULL, NULL, &tv);
 
   /* Open named pipe for reading. This will block until a writer arrives. */
   if((fd_np2 = open(NAMEDPIPE2, O_RDONLY)) == -1) {
@@ -106,7 +105,7 @@ void do_child(void) {
   /* Wait for another second to allow the parent to run some tests. */
   tv.tv_sec = DO_HANDLEDATA;
   tv.tv_usec = 0;
-  retval = select(0, NULL, NULL, NULL, &tv);
+  (void) select(0, NULL, NULL, NULL, &tv);
   
   close(fd_np2);
 
@@ -115,7 +114,7 @@ void do_child(void) {
   /* Let the parent do initial read and write tests from and to the pipe. */
   tv.tv_sec = DO_PAUSE;
   tv.tv_usec = 0;
-  retval = select(0, NULL, NULL, NULL, &tv);
+  (void) select(0, NULL, NULL, NULL, &tv);
   
   /* Unblock blocking read select by writing data */
   if(write(fd_ap[1], SENDSTRING, strlen(SENDSTRING)) < 0) {

test/t40f.c

@@ -62,12 +62,11 @@ float compute_diff(struct timeval start, struct timeval end, float compare) {
 
 void do_child(void) {
   struct timeval tv;
-  int retval;
  
   /* Let the parent do initial read and write tests from and to the pipe. */
   tv.tv_sec = DO_PAUSE + DO_PAUSE + DO_PAUSE + 1;
   tv.tv_usec = 0;
-  retval = select(0, NULL, NULL, NULL, &tv);
+  (void) select(0, NULL, NULL, NULL, &tv);
 
   /* At this point the parent has a pending select with a DO_TIMEOUT timeout.
      We're going to interrupt by sending a signal */

test/test1.c

@@ -75,9 +75,7 @@ void parent()
 void child(i)
 int i;
 {
-  int n;
+  (void) getpid();
-
-  n = getpid();
   exit(100+i);
 }
 

test/test10.c

@@ -72,12 +72,12 @@ int main()
 void spawn(n)
 int n;
 {
-  int pid, k;
+  int pid;
 
   if ((pid = fork()) != 0) {
 	wait(&n);		/* wait for some child (any one) */
   } else {
-	k = execl(name[n], name[n], (char *) 0);
+	execl(name[n], name[n], (char *) 0);
 	errct++;
 	printf("Child execl didn't take. file=%s errno=%d\n", name[n], errno);
 	rmfiles();

test/test20.c

@@ -41,11 +41,9 @@ char executable[1024];
 
 int main(int argc, char *argv[])
 {
-  int i, m = 0xFFFF;
+  int i;
 
   sync();
-  if (argc == 2) m = atoi(argv[1]);
-
   /* If we have to check things, call do_check(). */
   if (strcmp(argv[0], "DO CHECK") == 0) exit(do_check());
 

test/test5.c

@@ -210,7 +210,7 @@ void test5e()
 /* When a signal knocks a processes out of WAIT or PAUSE, it is supposed to
  * get EINTR as error status.  Check that.
  */
-  int n, j;
+  int n;
 
   subtest = 5;
   if (signal(8, func8) == SIG_ERR) e(25);
@@ -222,7 +222,7 @@ void test5e()
 	if (wait(&n) < 0) e(27);
 	if (signal(8, SIG_DFL) == SIG_ERR) e(28);
   } else {
-	j = pause();
+	(void) pause();
 	if (errno != EINTR && -errno != EINTR) e(29);
 	exit(0);
   }
@@ -282,7 +282,7 @@ void test5h()
 /* When a signal knocks a processes out of PIPE, it is supposed to
  * get EINTR as error status.  Check that.
  */
-  int n, j, fd[2];
+  int n, fd[2];
 
   subtest = 8;
   unlink("XXX.test5");
@@ -301,7 +301,7 @@ void test5h()
 	if (close(fd[1]) != 0) e(6);
   } else {
 	if (creat("XXX.test5", 0777) < 0) e(7);
-	j = read(fd[0], (char *) &n, 1);
+	(void) read(fd[0], (char *) &n, 1);
 	if (errno != EINTR) e(8);
 	exit(0);
   }

test/test56.c

@@ -471,10 +471,8 @@ void test_bind(void)
 	int sd;
 	int sd2;
 	int rc;
-	int on;
 
 	debug("entering test_bind()");
-	on = 1;
 	UNLINK(TEST_SUN_PATH);
 	memset(&addr, '\0', sizeof(struct sockaddr_un));
 	addr.sun_family = AF_UNIX;
@@ -980,9 +978,7 @@ void test_dup2(void)
  */
 void test_xfer_server(pid_t pid)
 {
-	socklen_t ucred_length;
 	int i;
-	int on;
 	struct timeval tv;
 	fd_set readfds;
 	int status;
@@ -994,11 +990,9 @@ void test_xfer_server(pid_t pid)
 	struct sockaddr_un addr;
 	struct sockaddr_un client_addr;
 
-	on = 1;
 	status = 0;
 	rc = 0;
 	sd = 0;
-	ucred_length = sizeof(struct ucred);
 	client_sd = 0;
 	client_addr_size = sizeof(struct sockaddr_un);
 
@@ -2481,9 +2475,6 @@ void test_permissions(void) {
 	pid_t pid;
 	int sd, rc, status;
 	struct sockaddr_un addr;
-	socklen_t client_addr_size;
-
-	client_addr_size = sizeof(struct sockaddr_un);
 
 	memset(&addr, '\0', sizeof(struct sockaddr_un));
 	addr.sun_family = AF_UNIX;

test/test9.c

@@ -233,6 +233,18 @@ void level1()
   p = &buf[10];
   i = 200;
   p = &buf[20];
+ 
+#ifdef __GNUC__
+	/*
+	 * to defeat the smartness of the GNU C optimizer we pretend we
+	 * use 'a'. Otherwise the optimizer will not detect the looping
+	 * effectuated by setjmp/longjmp, so that it thinks it can get
+	 * rid of the assignment to 'a'.
+	 */
+  srand(i);
+  srand((int)*p);
+#endif
+
   longjmp(env, 2);
 }