Thanks Daniel. :-)
The protection mechanism is a little weak. Here is my patch.
diff -r 28ce48573771 tools/ioemu/vl.c
--- a/tools/ioemu/vl.c Wed Nov 30 19:55:08 2005
+++ b/tools/ioemu/vl.c Thu Dec 1 17:00:21 2005
@@ -1218,17 +1218,22 @@
CharDriverState *qemu_chr_open_pty(void)
{
int master_fd, slave_fd;
+ char *slave_name;
struct termios term;
if (openpty(&master_fd, &slave_fd, NULL, NULL, NULL) < 0)
return NULL;
- /* Set raw attributes on the pty. */
- cfmakeraw(&term);
- tcsetattr(slave_fd, TCSAFLUSH, &term);
-
- fprintf(stderr, "char device redirected to %s\n", ptsname(slave_fd));
- store_console_dev(domid, ptsname(slave_fd));
+ slave_name = ptsname(master_fd);
+ if (slave_name) {
+ fprintf(stderr, "char device redirected to %s\n", slave_name);
+ store_console_dev(domid, slave_name);
+ /* Set raw attributes on the pty. */
+ cfmakeraw(&term);
+ tcsetattr(slave_fd, TCSAFLUSH, &term);
+ } else {
+ fprintf(logfile, "failed to redirect char device to pty");
+ }
return qemu_chr_open_fd(master_fd, master_fd);
}
>-----Original Message-----
>From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
>[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Daniel Stekloff
>Sent: Thursday, December 01, 2005 3:57 PM
>To: xen-users@xxxxxxxxxxxxxxxxxxx; Steve Dobbelstein
>Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-users] xm create of a VMX fails - qemu-dm gets SIGSEGV
>
>On Wednesday 30 November 2005 16:09, Steve Dobbelstein wrote:
>> Greetings, all.
>>
>> I'm having trouble getting a VMX domain started. I'm running on changeset
>> 8119. Shortly after the "xm create" finishes the qemu-dm process goes
>> defunct. I wrote a little script so that strace could attach to the
>> qemu-dm process right after the "xm create" finishes:
>
>The problem is ptsname(slave_fd) is returning NULL in the ioemu/vl.c code that
>was introduced in changeset 8118:590915af8117.
>
>I've changed ptsname to ttyname() and it works. Not sure if this is the right
>fix.
>
>Signed-off-by: Daniel Stekloff <dsteklof@xxxxxxxxxx>
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