sandbox: Allow Ctrl-C to work in sandbox
It is useful for Cltl-C to be handled by U-Boot as it is on other boards.
But it is also useful to be able to terminate U-Boot with Ctrl-C.
Add an option to enable signals while in raw mode, and make this the
default. Add an option to leave the terminal cooked, which is useful for
redirecting output.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 52e1096..9de71bb 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -104,21 +104,22 @@
/* Restore tty state when we exit */
static struct termios orig_term;
+static bool term_setup;
static void os_fd_restore(void)
{
- tcsetattr(0, TCSANOW, &orig_term);
+ if (term_setup)
+ tcsetattr(0, TCSANOW, &orig_term);
}
/* Put tty into raw mode so <tab> and <ctrl+c> work */
-void os_tty_raw(int fd)
+void os_tty_raw(int fd, bool allow_sigs)
{
- static int setup = 0;
struct termios term;
- if (setup)
+ if (term_setup)
return;
- setup = 1;
+ term_setup = true;
/* If not a tty, don't complain */
if (tcgetattr(fd, &orig_term))
@@ -128,7 +129,7 @@
term.c_iflag = IGNBRK | IGNPAR;
term.c_oflag = OPOST | ONLCR;
term.c_cflag = CS8 | CREAD | CLOCAL;
- term.c_lflag = 0;
+ term.c_lflag = allow_sigs ? ISIG : 0;
if (tcsetattr(fd, TCSANOW, &term))
return;
diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c
index 4d5569e..36dfc0a 100644
--- a/arch/sandbox/cpu/start.c
+++ b/arch/sandbox/cpu/start.c
@@ -184,6 +184,34 @@
SANDBOX_CMDLINE_OPT_SHORT(show_lcd, 'l', 0,
"Show the sandbox LCD display");
+static const char *term_args[STATE_TERM_COUNT] = {
+ "raw-with-sigs",
+ "raw",
+ "cooked",
+};
+
+static int sandbox_cmdline_cb_terminal(struct sandbox_state *state,
+ const char *arg)
+{
+ int i;
+
+ for (i = 0; i < STATE_TERM_COUNT; i++) {
+ if (!strcmp(arg, term_args[i])) {
+ state->term_raw = i;
+ return 0;
+ }
+ }
+
+ printf("Unknown terminal setting '%s' (", arg);
+ for (i = 0; i < STATE_TERM_COUNT; i++)
+ printf("%s%s", i ? ", " : "", term_args[i]);
+ puts(")\n");
+
+ return 1;
+}
+SANDBOX_CMDLINE_OPT_SHORT(terminal, 't', 1,
+ "Set terminal to raw/cooked mode");
+
int main(int argc, char *argv[])
{
struct sandbox_state *state;