1 | /*- |
2 | * Copyright (c) 1990, 1993 |
3 | * The Regents of the University of California. All rights reserved. |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * 4. Neither the name of the University nor the names of its contributors |
14 | * may be used to endorse or promote products derived from this software |
15 | * without specific prior written permission. |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
27 | * SUCH DAMAGE. |
28 | */ |
29 | |
30 | #if defined(LIBC_SCCS) && !defined(lint) |
31 | static char sccsid[] = "@(#)login_tty.c 8.1 (Berkeley) 6/4/93" ; |
32 | #endif /* LIBC_SCCS and not lint */ |
33 | |
34 | #include <errno.h> |
35 | #include <sys/param.h> |
36 | #include <sys/ioctl.h> |
37 | #include <unistd.h> |
38 | #include <fcntl.h> |
39 | #include <utmp.h> |
40 | |
41 | int |
42 | login_tty (int fd) |
43 | { |
44 | (void) setsid(); |
45 | #ifdef TIOCSCTTY |
46 | if (ioctl(fd, TIOCSCTTY, (char *)NULL) == -1) |
47 | return (-1); |
48 | #else |
49 | { |
50 | /* This might work. */ |
51 | char *fdname = ttyname (fd); |
52 | int newfd; |
53 | if (fdname) |
54 | { |
55 | if (fd != 0) |
56 | (void) close (0); |
57 | if (fd != 1) |
58 | (void) close (1); |
59 | if (fd != 2) |
60 | (void) close (2); |
61 | newfd = open (fdname, O_RDWR); |
62 | (void) close (newfd); |
63 | } |
64 | } |
65 | #endif |
66 | while (dup2(fd, 0) == -1 && errno == EBUSY) |
67 | ; |
68 | while (dup2(fd, 1) == -1 && errno == EBUSY) |
69 | ; |
70 | while (dup2(fd, 2) == -1 && errno == EBUSY) |
71 | ; |
72 | if (fd > 2) |
73 | (void) close(fd); |
74 | return (0); |
75 | } |
76 | libutil_hidden_def (login_tty) |
77 | |