// Refreshes utmp(cache for online users.)
int refresh_utmp(void)
{
int utmpfd, ucachefd;
struct user_info *uentp;
int n;
int count = 0; // Online users count.
time_t now;
resolve_utmp();
if (resolve_ucache() == -1)
return -1;
now = time(NULL);
// Lock caches.
utmpfd = utmp_lock();
if (utmpfd == -1)
return -1;
ucachefd = ucache_lock();
if (ucachefd == -1)
return -1;
memset(uidshm->status, 0, sizeof(uidshm->status));
for (n = 0; n < USHM_SIZE; n++) {
uentp = &(utmpshm->uinfo[n]);
if (uentp->active && uentp->pid) {
// See if pid exists.
if (bbskill(uentp, 0) == -1) {
memset(uentp, 0, sizeof(struct user_info));
continue;
} else {
// Kick idle users out.
if (uentp->mode != BBSNET
&& now - uentp->idle_time > IDLE_TIMEOUT) {
bbskill(uentp, SIGHUP);
memset(uentp, 0, sizeof(struct user_info));
} else {
// Increase status.
uidshm->status[uentp->uid - 1]++;
// Count online users.
++count;
}
}
}
}
utmpshm->total_num = count;
// Get count of all users from ucache.
utmpshm->usersum = allusers();
// Unlock caches.
ucache_unlock(ucachefd);
utmp_unlock(utmpfd);
return count;
}
int getnewutmpent( struct user_info *up)
{
int utmpfd;
struct user_info *uentp;
time_t now;
int i, n, num[2];
FILE * fp;
fp=fopen(ULIST, "rw+");
utmpfd = fileno(fp);
if (utmpfd < 0)
return -1;
flock(utmpfd, LOCK_EX);
resolve_utmp();
flock(utmpfd, LOCK_EX);
if (utmpshm->max_login_num < count_users)
utmpshm->max_login_num = count_users;
for (i = 0; i < USHM_SIZE; i++)
{
uentp = &(utmpshm->uinfo[i]);
if (!uentp->active || !uentp->pid)
break;
}
if (i >= USHM_SIZE)
{
flock(utmpfd, LOCK_UN);
close(utmpfd);/* add by yiyo */
return -2;
}
utmpshm->uinfo[i] = *up;
now = time(0);
if (now > utmpshm->uptime + 60)
{
num[0] = num[1] = 0;
utmpshm->uptime = now;
for (n = 0; n < USHM_SIZE; n++)
{
uentp = &(utmpshm->uinfo[n]);
if (uentp->active && uentp->pid)
{
//web登陆没有守护进程，pid没有意义，所以，不检测web的pid
if (uentp->mode < 20000 && kill(uentp->pid, 0) == -1)
{
//huangxu@071220:貌似不能这样
//kill(uentp->pid, 9);
//memset(uentp, 0, sizeof(struct user_info));
continue;
}
else
{
num[(uentp->invisible == YEA) ? 1 : 0]++;
//huangxu@071203:这个数组有嘛用？还是尝试清0吧。
//memset(uentp, 0, sizeof(struct user_info));
//todo:需要一个专门的函数处理时间计算。
}
}
}
utmpshm->usersum = allusers();
n = USHM_SIZE - 1;
while (n > 0 && utmpshm->uinfo[n].active == 0)
n--;
ftruncate(utmpfd, 0);
write(utmpfd, utmpshm->uinfo, (n + 1) * sizeof(struct user_info));
}
flock(utmpfd, LOCK_UN);
close(utmpfd);
return i + 1;
}