/*
* Try to kill the process and verify it has exited
*
* Returns 0 if it was killed gracefully, 1 if it
* was killed forcibly, -1 if it is still alive,
* or another error occurred.
*/
int
virProcessKillPainfully(pid_t pid, bool force)
{
size_t i;
int ret = -1;
const char *signame = "TERM";
VIR_DEBUG("vpid=%lld force=%d", (long long)pid, force);
/* This loop sends SIGTERM, then waits a few iterations (10 seconds)
* to see if it dies. If the process still hasn't exited, and
* @force is requested, a SIGKILL will be sent, and this will
* wait up to 5 seconds more for the process to exit before
* returning.
*
* Note that setting @force could result in dataloss for the process.
*/
for (i = 0; i < 75; i++) {
int signum;
if (i == 0) {
signum = SIGTERM; /* kindly suggest it should exit */
} else if (i == 50 && force) {
VIR_DEBUG("Timed out waiting after SIGTERM to process %lld, "
"sending SIGKILL", (long long)pid);
/* No SIGKILL kill on Win32 ! Use SIGABRT instead which our
* virProcessKill proc will handle more or less like SIGKILL */
#ifdef WIN32
signum = SIGABRT; /* kill it after a grace period */
signame = "ABRT";
#else
signum = SIGKILL; /* kill it after a grace period */
signame = "KILL";
#endif
} else {
signum = 0; /* Just check for existence */
}
if (virProcessKill(pid, signum) < 0) {
if (errno != ESRCH) {
virReportSystemError(errno,
_("Failed to terminate process %lld with SIG%s"),
(long long)pid, signame);
goto cleanup;
}
ret = signum == SIGTERM ? 0 : 1;
goto cleanup; /* process is dead */
}
usleep(200 * 1000);
}
virReportSystemError(EBUSY,
_("Failed to terminate process %lld with SIG%s"),
(long long)pid, signame);
cleanup:
return ret;
}
static int
qemuAgentOpenUnix(const char *monitor, pid_t cpid, bool *inProgress)
{
struct sockaddr_un addr;
int monfd;
int timeout = 3; /* In seconds */
int ret, i = 0;
*inProgress = false;
if ((monfd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
virReportSystemError(errno,
"%s", _("failed to create socket"));
return -1;
}
if (virSetNonBlock(monfd) < 0) {
virReportSystemError(errno, "%s",
_("Unable to put monitor "
"into non-blocking mode"));
goto error;
}
if (virSetCloseExec(monfd) < 0) {
virReportSystemError(errno, "%s",
_("Unable to set monitor "
"close-on-exec flag"));
goto error;
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
if (virStrcpyStatic(addr.sun_path, monitor) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Agent path %s too big for destination"), monitor);
goto error;
}
do {
ret = connect(monfd, (struct sockaddr *) &addr, sizeof(addr));
if (ret == 0)
break;
if ((errno == ENOENT || errno == ECONNREFUSED) &&
virProcessKill(cpid, 0) == 0) {
/* ENOENT : Socket may not have shown up yet
* ECONNREFUSED : Leftover socket hasn't been removed yet */
continue;
}
if ((errno == EINPROGRESS) ||
(errno == EAGAIN)) {
VIR_DEBUG("Connection attempt continuing in background");
*inProgress = true;
ret = 0;
break;
}
virReportSystemError(errno, "%s",
_("failed to connect to monitor socket"));
goto error;
} while ((++i <= timeout*5) && (usleep(.2 * 1000000) <= 0));
if (ret != 0) {
virReportSystemError(errno, "%s",
_("monitor socket did not show up."));
goto error;
}
return monfd;
error:
VIR_FORCE_CLOSE(monfd);
return -1;
}
