static int del_conn(struct iscsi_target *target, unsigned long ptr)
{
int err;
struct iscsi_session *session;
struct conn_info info;
if ((err = copy_from_user(&info, (void *) ptr, sizeof(info))) < 0)
return err;
if (!(session = session_lookup(target, info.sid)))
return -ENOENT;
return conn_del(session, &info);
}
static int send_to_one(conn_t *conn, const char *fmt, ...)
{
int ret;
va_list ap;
char buf[US_SOCK_BUF_LEN];
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
ret = write(conn->fd, buf, strlen(buf));
if ((ret < 1) || (ret != (int) strlen(buf))) {
upsdebugx(2, "write to fd %d failed", conn->fd);
close(conn->fd);
conn_del(conn);
return 0; /* failed */
}
return 1; /* OK */
}
static void start_daemon(int lockfd)
{
int maxfd, pid, pipefd, ret;
struct timeval tv;
fd_set rfds;
conn_t *tmp, *tmpnext;
us_serialize(SERIALIZE_INIT);
if ((pid = fork()) < 0)
fatal_with_errno(EXIT_FAILURE, "Unable to enter background");
if (pid != 0) { /* parent */
/* wait for child to set up the listener */
us_serialize(SERIALIZE_WAIT);
return;
}
/* child */
close(0);
close(1);
close(2);
/* make fds 0-2 point somewhere defined */
if (open("/dev/null", O_RDWR) != 0)
fatal_with_errno(EXIT_FAILURE, "open /dev/null");
if (dup(0) == -1)
fatal_with_errno(EXIT_FAILURE, "dup");
if (dup(0) == -1)
fatal_with_errno(EXIT_FAILURE, "dup");
pipefd = open_sock();
if (verbose)
upslogx(LOG_INFO, "Timer daemon started");
/* release the parent */
us_serialize(SERIALIZE_SET);
/* drop the lock now that the background is running */
unlink(lockfn);
close(lockfd);
/* now watch for activity */
for (;;) {
/* wait at most 1s so we can check our timers regularly */
tv.tv_sec = 1;
tv.tv_usec = 0;
FD_ZERO(&rfds);
FD_SET(pipefd, &rfds);
maxfd = pipefd;
for (tmp = connhead; tmp != NULL; tmp = tmp->next) {
FD_SET(tmp->fd, &rfds);
if (tmp->fd > maxfd)
maxfd = tmp->fd;
}
ret = select(maxfd + 1, &rfds, NULL, NULL, &tv);
if (ret > 0) {
if (FD_ISSET(pipefd, &rfds))
conn_add(pipefd);
tmp = connhead;
while (tmp) {
tmpnext = tmp->next;
if (FD_ISSET(tmp->fd, &rfds)) {
if (sock_read(tmp) < 0) {
close(tmp->fd);
conn_del(tmp);
}
}
tmp = tmpnext;
}
}
checktimers();
}
}
