diff --git a/ports/src/lib/libc_noux/plugin.cc b/ports/src/lib/libc_noux/plugin.cc
index 5b6cbdab3..3020e65b3 100644
--- a/ports/src/lib/libc_noux/plugin.cc
+++ b/ports/src/lib/libc_noux/plugin.cc
@@ -211,6 +211,16 @@ extern "C" int execve(char const *filename, char *const argv[],
 }
 
 
+/**
+ * Called by execvp
+ */
+extern "C" int _execve(char const *filename, char *const argv[],
+                       char *const envp[])
+{
+	return execve(filename, argv, envp);
+}
+
+
 /**
  * Return number of marhalled file descriptors into select argument buffer
  *
@@ -376,6 +386,9 @@ extern "C" pid_t fork(void)
 }
 
 
+extern "C" pid_t vfork(void) { return fork(); }
+
+
 extern "C" pid_t getpid(void)
 {
 	noux()->syscall(Noux::Session::SYSCALL_GETPID);
@@ -385,14 +398,22 @@ extern "C" pid_t getpid(void)
 
 extern "C" int access(char const *pathname, int mode)
 {
-	PDBG("access '%s' (mode=%x) called, not implemented", pathname, mode);
-	return 0;
+	if (verbose)
+		PDBG("access '%s' (mode=%x) called, not implemented", pathname, mode);
+
+	struct stat stat;
+	if (::stat(pathname, &stat) == 0)
+		return 0;
+
+	errno = ENOENT;
+	return -1;
 }
 
 
 extern "C" int chmod(char const *path, mode_t mode)
 {
-	PDBG("chmod '%s' to 0x%x not implemented", path, mode);
+	if (verbose)
+		PDBG("chmod '%s' to 0x%x not implemented", path, mode);
 	return 0;
 }
 
@@ -426,7 +447,8 @@ extern "C" pid_t _wait4(pid_t pid, int *status, int options,
 
 extern "C" int clock_gettime(clockid_t clk_id, struct timespec *tp)
 {
-	PDBG("clock_gettime called - not implemented");
+	if (verbose)
+		PDBG("clock_gettime called - not implemented");
 	errno = EINVAL;
 	return -1;
 }
@@ -434,7 +456,8 @@ extern "C" int clock_gettime(clockid_t clk_id, struct timespec *tp)
 
 extern "C" int gettimeofday(struct timeval *tv, struct timezone *tz)
 {
-	PDBG("gettimeofdaye called - not implemented");
+	if (verbose)
+		PDBG("gettimeofdaye called - not implemented");
 	errno = EINVAL;
 	return -1;
 }
@@ -548,10 +571,14 @@ namespace {
 	Libc::File_descriptor *Plugin::open(char const *pathname, int flags)
 	{
 		if (Genode::strlen(pathname) + 1 > sizeof(sysio()->open_in.path)) {
+			PDBG("ENAMETOOLONG");
 			errno = ENAMETOOLONG;
 			return 0;
 		}
 
+		if (flags & O_CREAT)
+			unlink(pathname);
+
 		Genode::strncpy(sysio()->open_in.path, pathname, sizeof(sysio()->open_in.path));
 		sysio()->open_in.mode = flags;
 
@@ -559,6 +586,7 @@ namespace {
 			/*
 			 * XXX  we should return meaningful errno values
 			 */
+			PDBG("ENOENT (sysio()->error.open=%d)", sysio()->error.open);
 			errno = ENOENT;
 			return 0;
 		}
@@ -665,7 +693,8 @@ namespace {
 
 		case TIOCGETA:
 			{
-				PDBG("TIOCGETA - argp=0x%p", argp);
+				if (verbose)
+					PDBG("TIOCGETA - argp=0x%p", argp);
 				::termios *termios = (::termios *)argp;
 
 				/*
@@ -769,7 +798,8 @@ namespace {
 
 	int Plugin::fsync(Libc::File_descriptor *fd)
 	{
-		PDBG("not implemented");
+		if (verbose)
+			PDBG("not implemented");
 		return 0;
 	}
 
diff --git a/ports/src/noux/fs_file_system.h b/ports/src/noux/fs_file_system.h
index 350ae769c..d6ca918d1 100644
--- a/ports/src/noux/fs_file_system.h
+++ b/ports/src/noux/fs_file_system.h
@@ -333,7 +333,7 @@ namespace Noux {
 				bool const create = sysio->open_in.mode & Sysio::OPEN_MODE_CREATE;
 
 				if (create)
-					PDBG("creation of file %s requested", file_name.base());
+					PDBG("creation of file %s requested", file_name.base() + 1);
 
 				::File_system::Dir_handle dir = _fs.dir(dir_path.base(), false);
 				Fs_handle_guard dir_guard(_fs, dir);
@@ -350,7 +350,6 @@ namespace Noux {
 					error = Sysio::OPEN_ERR_NO_PERM; }
 
 				sysio->error.open = error;
-
 				return 0;
 			}
 
diff --git a/ports/src/noux/tar_file_system.h b/ports/src/noux/tar_file_system.h
index e50cc7e33..02f0078ee 100644
--- a/ports/src/noux/tar_file_system.h
+++ b/ports/src/noux/tar_file_system.h
@@ -29,6 +29,8 @@ namespace Noux {
 
 	class Tar_file_system : public File_system
 	{
+		enum { verbose = false };
+
 		Lock _lock;
 
 		struct Rom_name
@@ -336,7 +338,10 @@ namespace Noux {
 				case Record::TYPE_FILE:    mode |= Sysio::STAT_MODE_FILE; break;
 				case Record::TYPE_SYMLINK: mode |= Sysio::STAT_MODE_SYMLINK; break;
 				case Record::TYPE_DIR:     mode |= Sysio::STAT_MODE_DIRECTORY; break;
-				default: PDBG("unhandled record type %d", record->type());
+
+				default:
+					if (verbose)
+						PDBG("unhandled record type %d", record->type());
 				}
 
 				sysio->stat_out.st.mode  = mode;
@@ -364,7 +369,10 @@ namespace Noux {
 				case 0: sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_FILE;      break;
 				case 2: sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_SYMLINK;   break;
 				case 5: sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_DIRECTORY; break;
-				default: PDBG("unhandled record type %d", record->type());
+
+				default:
+					if (verbose)
+						PDBG("unhandled record type %d", record->type());
 				}
 
 				Absolute_path absolute_path(record->name());
diff --git a/ports/src/noux/terminal_io_channel.h b/ports/src/noux/terminal_io_channel.h
index da6b9d425..e222e397c 100644
--- a/ports/src/noux/terminal_io_channel.h
+++ b/ports/src/noux/terminal_io_channel.h
@@ -140,7 +140,6 @@ namespace Noux {
 					Terminal::Session::Size size = terminal.size();
 					sysio->ioctl_out.tiocgwinsz.rows    = size.lines();
 					sysio->ioctl_out.tiocgwinsz.columns = size.columns();
-					PDBG("OP_TIOCGWINSZ requested");
 					return true;
 				}