chiark / gitweb /
Handle flags on challenge timers correctly to prevent confusing the event
[tripe] / util.c
CommitLineData
410c8acf 1/* -*-c-*-
2 *
b542dd0b 3 * $Id: util.c,v 1.2 2001/02/22 09:07:08 mdw Exp $
410c8acf 4 *
5 * Utilities for the client and the server
6 *
7 * (c) 2001 Straylight/Edgeware
8 */
9
10/*----- Licensing notice --------------------------------------------------*
11 *
12 * This file is part of Trivial IP Encryption (TrIPE).
13 *
14 * TrIPE is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * TrIPE is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with TrIPE; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 */
28
29/*----- Revision history --------------------------------------------------*
30 *
31 * $Log: util.c,v $
b542dd0b 32 * Revision 1.2 2001/02/22 09:07:08 mdw
33 * Separate detach-from-terminal code into a separate function.
34 *
410c8acf 35 * Revision 1.1 2001/02/03 20:26:37 mdw
36 * Initial checkin.
37 *
38 */
39
40/*----- Header files ------------------------------------------------------*/
41
42#include <errno.h>
43#include <stdio.h>
44#include <stdlib.h>
45#include <string.h>
46
47#include <sys/types.h>
48#include <unistd.h>
49#include <fcntl.h>
50
51#include "util.h"
52
53#include <sys/ioctl.h>
54
55/*----- Main code ---------------------------------------------------------*/
56
b542dd0b 57/* --- @u_detach@ --- *
410c8acf 58 *
59 * Arguments: ---
60 *
b542dd0b 61 * Returns: ---
410c8acf 62 *
b542dd0b 63 * Use: Detaches from the current terminal and ensures it can never
64 * acquire a new one. Calls @fork@.
410c8acf 65 */
66
b542dd0b 67void u_detach(void)
410c8acf 68{
410c8acf 69#ifdef TIOCNOTTY
70 {
71 int fd;
72 if ((fd = open("/dev/tty", O_RDONLY)) >= 0) {
73 ioctl(fd, TIOCNOTTY);
74 close(fd);
75 }
76 }
77#endif
78 setsid();
410c8acf 79 if (fork() > 0)
80 _exit(0);
b542dd0b 81}
82
83/* --- @u_daemon@ --- *
84 *
85 * Arguments: ---
86 *
87 * Returns: Zero if OK, nonzero on failure.
88 *
89 * Use: Becomes a daemon.
90 */
91
92int u_daemon(void)
93{
94 pid_t kid;
95
96 if ((kid = fork()) < 0)
97 return (-1);
98 if (kid)
99 _exit(0);
100 u_detach();
410c8acf 101 return (0);
102}
103
104/*----- That's all, folks -------------------------------------------------*/