libvirt/examples/domain-events/events-c/event-test.c

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#include <config.h>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
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#if HAVE_SYS_POLL_H
#include <sys/types.h>
#include <sys/poll.h>
#include <libvirt/libvirt.h>
#define DEBUG0(fmt) printf("%s:%d :: " fmt "\n", \
__func__, __LINE__)
#define DEBUG(fmt, ...) printf("%s:%d: " fmt "\n", \
__func__, __LINE__, __VA_ARGS__)
#define STREQ(a,b) (strcmp(a,b) == 0)
#ifndef ATTRIBUTE_UNUSED
#define ATTRIBUTE_UNUSED __attribute__((__unused__))
#endif
/* handle globals */
int h_fd = 0;
virEventHandleType h_event = 0;
virEventHandleCallback h_cb = NULL;
virFreeCallback h_ff = NULL;
void *h_opaque = NULL;
/* timeout globals */
#define TIMEOUT_MS 1000
int t_active = 0;
int t_timeout = -1;
virEventTimeoutCallback t_cb = NULL;
virFreeCallback t_ff = NULL;
void *t_opaque = NULL;
/* Prototypes */
const char *eventToString(int event);
int myDomainEventCallback1 (virConnectPtr conn, virDomainPtr dom,
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int event, int detail, void *opaque);
int myDomainEventCallback2 (virConnectPtr conn, virDomainPtr dom,
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int event, int detail, void *opaque);
int myEventAddHandleFunc (int fd, int event,
virEventHandleCallback cb,
void *opaque,
virFreeCallback ff);
void myEventUpdateHandleFunc(int watch, int event);
int myEventRemoveHandleFunc(int watch);
int myEventAddTimeoutFunc(int timeout,
virEventTimeoutCallback cb,
void *opaque,
virFreeCallback ff);
void myEventUpdateTimeoutFunc(int timer, int timout);
int myEventRemoveTimeoutFunc(int timer);
int myEventHandleTypeToPollEvent(virEventHandleType events);
virEventHandleType myPollEventToEventHandleType(int events);
void usage(const char *pname);
/* Callback functions */
const char *eventToString(int event) {
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const char *ret = "";
switch(event) {
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case VIR_DOMAIN_EVENT_DEFINED:
ret ="Defined";
break;
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case VIR_DOMAIN_EVENT_UNDEFINED:
ret ="Undefined";
break;
case VIR_DOMAIN_EVENT_STARTED:
ret ="Started";
break;
case VIR_DOMAIN_EVENT_SUSPENDED:
ret ="Suspended";
break;
case VIR_DOMAIN_EVENT_RESUMED:
ret ="Resumed";
break;
case VIR_DOMAIN_EVENT_STOPPED:
ret ="Stopped";
break;
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}
return ret;
}
static const char *eventDetailToString(int event, int detail) {
const char *ret = "";
switch(event) {
case VIR_DOMAIN_EVENT_DEFINED:
if (detail == VIR_DOMAIN_EVENT_DEFINED_ADDED)
ret = "Added";
else if (detail == VIR_DOMAIN_EVENT_DEFINED_UPDATED)
ret = "Updated";
break;
case VIR_DOMAIN_EVENT_UNDEFINED:
if (detail == VIR_DOMAIN_EVENT_UNDEFINED_REMOVED)
ret = "Removed";
break;
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case VIR_DOMAIN_EVENT_STARTED:
switch (detail) {
case VIR_DOMAIN_EVENT_STARTED_BOOTED:
ret = "Booted";
break;
case VIR_DOMAIN_EVENT_STARTED_MIGRATED:
ret = "Migrated";
break;
case VIR_DOMAIN_EVENT_STARTED_RESTORED:
ret = "Restored";
break;
}
break;
case VIR_DOMAIN_EVENT_SUSPENDED:
if (detail == VIR_DOMAIN_EVENT_SUSPENDED_PAUSED)
ret = "Paused";
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else if (detail == VIR_DOMAIN_EVENT_SUSPENDED_MIGRATED)
ret = "Migrated";
break;
case VIR_DOMAIN_EVENT_RESUMED:
if (detail == VIR_DOMAIN_EVENT_RESUMED_UNPAUSED)
ret = "Unpaused";
else if (detail == VIR_DOMAIN_EVENT_RESUMED_MIGRATED)
ret = "Migrated";
break;
case VIR_DOMAIN_EVENT_STOPPED:
switch (detail) {
case VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN:
ret = "Shutdown";
break;
case VIR_DOMAIN_EVENT_STOPPED_DESTROYED:
ret = "Destroyed";
break;
case VIR_DOMAIN_EVENT_STOPPED_CRASHED:
ret = "Crashed";
break;
case VIR_DOMAIN_EVENT_STOPPED_MIGRATED:
ret = "Migrated";
break;
case VIR_DOMAIN_EVENT_STOPPED_SAVED:
ret = "Failed";
break;
case VIR_DOMAIN_EVENT_STOPPED_FAILED:
ret = "Failed";
break;
}
break;
}
return ret;
}
int myDomainEventCallback1 (virConnectPtr conn ATTRIBUTE_UNUSED,
virDomainPtr dom,
int event,
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int detail,
void *opaque ATTRIBUTE_UNUSED)
{
printf("%s EVENT: Domain %s(%d) %s %s\n", __func__, virDomainGetName(dom),
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virDomainGetID(dom), eventToString(event),
eventDetailToString(event, detail));
return 0;
}
int myDomainEventCallback2 (virConnectPtr conn ATTRIBUTE_UNUSED,
virDomainPtr dom,
int event,
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int detail,
void *opaque ATTRIBUTE_UNUSED)
{
printf("%s EVENT: Domain %s(%d) %s %s\n", __func__, virDomainGetName(dom),
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virDomainGetID(dom), eventToString(event),
eventDetailToString(event, detail));
return 0;
}
static void myFreeFunc(void *opaque)
{
char *str = opaque;
printf("%s: Freeing [%s]\n", __func__, str);
free(str);
}
/* EventImpl Functions */
int myEventHandleTypeToPollEvent(virEventHandleType events)
{
int ret = 0;
if(events & VIR_EVENT_HANDLE_READABLE)
ret |= POLLIN;
if(events & VIR_EVENT_HANDLE_WRITABLE)
ret |= POLLOUT;
if(events & VIR_EVENT_HANDLE_ERROR)
ret |= POLLERR;
if(events & VIR_EVENT_HANDLE_HANGUP)
ret |= POLLHUP;
return ret;
}
virEventHandleType myPollEventToEventHandleType(int events)
{
virEventHandleType ret = 0;
if(events & POLLIN)
ret |= VIR_EVENT_HANDLE_READABLE;
if(events & POLLOUT)
ret |= VIR_EVENT_HANDLE_WRITABLE;
if(events & POLLERR)
ret |= VIR_EVENT_HANDLE_ERROR;
if(events & POLLHUP)
ret |= VIR_EVENT_HANDLE_HANGUP;
return ret;
}
int myEventAddHandleFunc(int fd, int event,
virEventHandleCallback cb,
void *opaque,
virFreeCallback ff)
{
DEBUG("Add handle %d %d %p %p", fd, event, cb, opaque);
h_fd = fd;
h_event = myEventHandleTypeToPollEvent(event);
h_cb = cb;
h_ff = ff;
h_opaque = opaque;
return 0;
}
void myEventUpdateHandleFunc(int fd, int event)
{
DEBUG("Updated Handle %d %d", fd, event);
h_event = myEventHandleTypeToPollEvent(event);
return;
}
int myEventRemoveHandleFunc(int fd)
{
DEBUG("Removed Handle %d", fd);
h_fd = 0;
if (h_ff)
(h_ff)(h_opaque);
return 0;
}
int myEventAddTimeoutFunc(int timeout,
virEventTimeoutCallback cb,
void *opaque,
virFreeCallback ff)
{
DEBUG("Adding Timeout %d %p %p", timeout, cb, opaque);
t_active = 1;
t_timeout = timeout;
t_cb = cb;
t_ff = ff;
t_opaque = opaque;
return 0;
}
void myEventUpdateTimeoutFunc(int timer ATTRIBUTE_UNUSED, int timeout)
{
/*DEBUG("Timeout updated %d %d", timer, timeout);*/
t_timeout = timeout;
}
int myEventRemoveTimeoutFunc(int timer)
{
DEBUG("Timeout removed %d", timer);
t_active = 0;
if (t_ff)
(t_ff)(t_opaque);
return 0;
}
/* main test functions */
void usage(const char *pname)
{
printf("%s uri\n", pname);
}
int run = 1;
static void stop(int sig)
{
printf("Exiting on signal %d\n", sig);
run = 0;
}
int main(int argc, char **argv)
{
int sts;
int callback1ret = -1;
int callback2ret = -1;
struct sigaction action_stop = {
.sa_handler = stop
};
if(argc > 1 && STREQ(argv[1],"--help")) {
usage(argv[0]);
return -1;
}
virEventRegisterImpl( myEventAddHandleFunc,
myEventUpdateHandleFunc,
myEventRemoveHandleFunc,
myEventAddTimeoutFunc,
myEventUpdateTimeoutFunc,
myEventRemoveTimeoutFunc);
virConnectPtr dconn = NULL;
dconn = virConnectOpen (argv[1] ? argv[1] : NULL);
if (!dconn) {
printf("error opening\n");
return -1;
}
sigaction(SIGTERM, &action_stop, NULL);
sigaction(SIGINT, &action_stop, NULL);
DEBUG0("Registering domain event cbs");
/* Add 2 callbacks to prove this works with more than just one */
callback1ret = virConnectDomainEventRegister(dconn, myDomainEventCallback1,
strdup("callback 1"), myFreeFunc);
callback2ret = virConnectDomainEventRegister(dconn, myDomainEventCallback2,
strdup("callback 2"), myFreeFunc);
if ((callback1ret == 0) && (callback2ret == 0) ) {
while(run) {
struct pollfd pfd = { .fd = h_fd,
.events = h_event,
.revents = 0};
sts = poll(&pfd, 1, TIMEOUT_MS);
/* if t_timeout < 0 then t_cb must not be called */
if (t_cb && t_active && t_timeout >= 0) {
t_cb(t_timeout,t_opaque);
}
if (sts == 0) {
/* DEBUG0("Poll timeout"); */
continue;
}
if (sts < 0 ) {
DEBUG0("Poll failed");
continue;
}
if ( pfd.revents & POLLHUP ) {
DEBUG0("Reset by peer");
return -1;
}
if(h_cb) {
h_cb(0,
h_fd,
myPollEventToEventHandleType(pfd.revents & h_event),
h_opaque);
}
}
DEBUG0("Deregistering event handlers");
virConnectDomainEventDeregister(dconn, myDomainEventCallback1);
virConnectDomainEventDeregister(dconn, myDomainEventCallback2);
}
DEBUG0("Closing connection");
if( dconn && virConnectClose(dconn)<0 ) {
printf("error closing\n");
}
printf("done\n");
return 0;
}
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#else
int main(void) {
printf("event-test program not available without sys/poll.h support\n");
return 1;
}
#endif