sandbox: put stdin into raw mode
This allows us to act like a serial device: we get tab chars and CTRL+C
and respond appropriately.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Tested-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 6c175d4..f80faac 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -21,6 +21,7 @@
#include <fcntl.h>
#include <stdlib.h>
+#include <termios.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
@@ -53,3 +54,36 @@
{
exit(exit_code);
}
+
+/* Restore tty state when we exit */
+static struct termios orig_term;
+
+static void os_fd_restore(void)
+{
+ tcsetattr(0, TCSANOW, &orig_term);
+}
+
+/* Put tty into raw mode so <tab> and <ctrl+c> work */
+void os_tty_raw(int fd)
+{
+ static int setup = 0;
+ struct termios term;
+
+ if (setup)
+ return;
+ setup = 1;
+
+ /* If not a tty, don't complain */
+ if (tcgetattr(fd, &orig_term))
+ return;
+
+ term = orig_term;
+ term.c_iflag = IGNBRK | IGNPAR;
+ term.c_oflag = OPOST | ONLCR;
+ term.c_cflag = CS8 | CREAD | CLOCAL;
+ term.c_lflag = 0;
+ if (tcsetattr(fd, TCSANOW, &term))
+ return;
+
+ atexit(os_fd_restore);
+}
diff --git a/drivers/serial/sandbox.c b/drivers/serial/sandbox.c
index 814a0f9..1927c16 100644
--- a/drivers/serial/sandbox.c
+++ b/drivers/serial/sandbox.c
@@ -30,6 +30,7 @@
int serial_init(void)
{
+ os_tty_raw(0);
return 0;
}
diff --git a/include/os.h b/include/os.h
index 3ea6d2d..d5df22f 100644
--- a/include/os.h
+++ b/include/os.h
@@ -71,3 +71,8 @@
* @param exit_code exit code for U-Boot
*/
void os_exit(int exit_code);
+
+/**
+ * Put tty into raw mode to mimic serial console better
+ */
+void os_tty_raw(int fd);