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kvm: Put terminal in canonical mode

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As suggested by Ingo Molnar, put terminal in canonical mode. This makes poll()
on stdin to react to keystrokes insted of return key and fixes the double
echo'd character problem for input.

Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Pekka Enberg
2011-01-09 22:15:04 +02:00
committed by Will Deacon
parent 76b4a12288
commit 7c3b4e4b0d
1 changed files with 31 additions and 1 deletions
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main.c
+31 -1
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@@ -7,6 +7,8 @@
#include "kvm/pci.h"
#include <inttypes.h>
#include <termios.h>
#include <unistd.h>
#include <signal.h>
#include <stdint.h>
#include <stdlib.h>
@@ -28,6 +30,30 @@ static void usage(char *argv[])
static struct kvm *kvm;
static void tty_set_canon_flag(int fd, int on)
{
struct termios tty;
int mask = ISTRIP | INLCR | ICRNL | IGNCR | IXON | IXOFF | ICANON | ECHO;
tcgetattr(fd, &tty);
if (on)
tty.c_lflag |= mask;
else
tty.c_lflag &= ~mask;
tcsetattr(fd, TCSAFLUSH, &tty);
}
static void shutdown(void)
{
tty_set_canon_flag(fileno(stdin), 0);
}
static void handle_sigint(int sig)
{
shutdown();
exit(1);
}
static void handle_sigquit(int sig)
{
kvm__show_registers(kvm);
@@ -86,7 +112,6 @@ static void setup_timer(void)
die("timer_settime()");
}
int main(int argc, char *argv[])
{
const char *kernel_filename = NULL;
@@ -98,7 +123,10 @@ int main(int argc, char *argv[])
bool single_step = false;
int i;
atexit(shutdown);
signal(SIGQUIT, handle_sigquit);
signal(SIGINT, handle_sigint);
for (i = 1; i < argc; i++) {
if (option_matches(argv[i], "--kernel=")) {
@@ -175,6 +203,8 @@ int main(int argc, char *argv[])
setup_timer();
tty_set_canon_flag(fileno(stdin), 1);
for (;;) {
kvm__run(kvm);