int lxc_monitor_read(int fd, struct lxc_msg *msg)
{
return lxc_monitor_read_timeout(fd, msg, -1);
}
extern int lxc_wait(const char *lxcname, const char *states, int timeout, const char *lxcpath)
{
struct lxc_msg msg;
int state, ret;
int s[MAX_STATE] = { }, fd;
if (fillwaitedstates(states, s))
return -1;
if (lxc_monitord_spawn(lxcpath))
return -1;
fd = lxc_monitor_open(lxcpath);
if (fd < 0)
return -1;
/*
* if container present,
* then check if already in requested state
*/
ret = -1;
state = lxc_getstate(lxcname, lxcpath);
if (state < 0) {
goto out_close;
} else if ((state >= 0) && (s[state])) {
ret = 0;
goto out_close;
}
for (;;) {
int elapsed_time, curtime = 0;
struct timeval tv;
int stop = 0;
int retval;
if (timeout != -1) {
retval = gettimeofday(&tv, NULL);
if (retval)
goto out_close;
curtime = tv.tv_sec;
}
if (lxc_monitor_read_timeout(fd, &msg, timeout) < 0) {
/* try again if select interrupted by signal */
if (errno != EINTR)
goto out_close;
}
if (timeout != -1) {
retval = gettimeofday(&tv, NULL);
if (retval)
goto out_close;
elapsed_time = tv.tv_sec - curtime;
if (timeout - elapsed_time <= 0)
stop = 1;
timeout -= elapsed_time;
}
if (strcmp(lxcname, msg.name)) {
if (stop) {
ret = -2;
goto out_close;
}
continue;
}
switch (msg.type) {
case lxc_msg_state:
if (msg.value < 0 || msg.value >= MAX_STATE) {
ERROR("Receive an invalid state number '%d'",
msg.value);
goto out_close;
}
if (s[msg.value]) {
ret = 0;
goto out_close;
}
break;
default:
if (stop) {
ret = -2;
goto out_close;
}
/* just ignore garbage */
break;
}
}
out_close:
lxc_monitor_close(fd);
return ret;
}