1 files changed, 44 insertions, 0 deletions
diff --git a/libgloss/m68k/atari/atari-read.c b/libgloss/m68k/atari/atari-read.c
new file mode 100644
index 0000000..cdff256
--- /dev/null
+++ b/libgloss/m68k/atari/atari-read.c
@@ -0,0 +1,44 @@
+/*
+	Copyright (C) 2025 Mikael Hildenborg
+	SPDX-License-Identifier: BSD-2-Clause
+*/
+
+#include <unistd.h>
+#include <_ansi.h>
+#include "atari-gem_errno.h"
+#include "atari-traps.h"
+
+_READ_WRITE_RETURN_TYPE read(int fd, void *buf, size_t nbytes)
+{
+	int numRead = GEM_EIHNDL;
+	if (fd >= 0)
+	{
+		numRead = trap1_3f((unsigned short)fd, nbytes, buf);
+		if (numRead >= 0 && numRead < nbytes && fd == GSH_CONIN)
+		{
+			/*
+				When reading from console, the EOF character is "\n".
+				Atari tos do not return the EOF character, but posix read do.
+				So we assume that when the trap call have not reached the nbytes limit,
+				then it must have gotten an EOF.
+				So in that case we insert "\n" to the end of the buffer and increase lenth by 1.
+			*/
+			((char*)buf)[numRead] = '\n';
+			++numRead;
+			/*
+				This is not enough however...
+				Atari tos requires a line feed to be "\r\n", and apparently, the "\r" is executed by tos
+				but not returned when reading. This is not a problem for us, but the "\n" as it is an EOF
+				is simply discarded and not executed. So we also need to send a "\n" to stdout to fully comply
+				with standard C behaviour.
+			*/
+			trap1_40(GSH_CONOUT, 1, "\n");
+		}
+	}
+	if (numRead < 0)
+	{
+		gem_error_to_errno(numRead);
+		return -1;
+	}
+	return numRead;
+}