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 #include <shlib-compat.h>
41
42 int
__login_tty(int fd)43 __login_tty (int fd)
44 {
45 __setsid();
46 #ifdef TIOCSCTTY
47 if (__ioctl(fd, TIOCSCTTY, NULL) == -1)
48 return (-1);
49 #else
50 {
51 /* This might work. */
52 char *fdname = ttyname (fd);
53 int newfd;
54 if (fdname)
55 {
56 if (fd != 0)
57 _close (0);
58 if (fd != 1)
59 __close (1);
60 if (fd != 2)
61 __close (2);
62 newfd = __open64 (fdname, O_RDWR);
63 __close (newfd);
64 }
65 }
66 #endif
67 while (__dup2(fd, 0) == -1 && errno == EBUSY)
68 ;
69 while (__dup2(fd, 1) == -1 && errno == EBUSY)
70 ;
71 while (__dup2(fd, 2) == -1 && errno == EBUSY)
72 ;
73 if (fd > 2)
74 __close(fd);
75 return (0);
76 }
77 versioned_symbol (libc, __login_tty, login_tty, GLIBC_2_34);
78 libc_hidden_ver (__login_tty, login_tty)
79
80 #if OTHER_SHLIB_COMPAT (libutil, GLIBC_2_0, GLIBC_2_34)
81 compat_symbol (libutil, __login_tty, login_tty, GLIBC_2_0);
82 #endif
83