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kvm tools: Exit KVM session on Ctrl+a and 'x'

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This patch makes Ctrl+a escape key and makes Ctrl+a and 'x' terminate the KVM
session. It works for both serial and virtio console. If you want to input
Ctrl+a to guest, type Ctrl+a twice.

[ penberg@kernel.org: Make terminated message more readable. ]
Tested-by: Amos Kong <akong@redhat.com>
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Asias He
2011-04-10 14:50:31 +08:00
committed by Will Deacon
parent 7a51b9da62
commit 1658801329
1 changed files with 37 additions and 6 deletions
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term.c
+37 -6
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@@ -9,9 +9,12 @@
#include "kvm/term.h"
#include "kvm/util.h"
static struct termios orig_term;
static struct termios orig_term;
int active_console = CONSOLE_8250;
int term_escape_char = 0x01; /* ctrl-a is used for escape */
bool term_got_escape = false;
int active_console = CONSOLE_8250;
int term_getc(int who)
{
@@ -22,6 +25,24 @@ int term_getc(int who)
if (read_in_full(STDIN_FILENO, &c, 1) < 0)
return -1;
c &= 0xff;
if (term_got_escape) {
term_got_escape = false;
if (c == 'x') {
printf("\n # KVM session terminated.\n");
exit(1);
}
if (c == term_escape_char)
return c;
}
if (c == term_escape_char) {
term_got_escape = true;
return -1;
}
return c;
}
@@ -39,16 +60,26 @@ int term_putc(int who, char *addr, int cnt)
int term_getc_iov(int who, struct iovec *iov, int iovcnt)
{
if (who != active_console)
return -1;
int c;
return readv(STDIN_FILENO, iov, iovcnt);
if (who != active_console)
return 0;
c = term_getc(who);
if (c < 0)
return 0;
*((int *)iov[0].iov_base) = c;
iov[0].iov_len = sizeof(int);
return sizeof(int);
}
int term_putc_iov(int who, struct iovec *iov, int iovcnt)
{
if (who != active_console)
return -1;
return 0;
return writev(STDOUT_FILENO, iov, iovcnt);
}