1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*-
* Copyright (c) 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)pty.c 8.3 (Berkeley) 5/16/94";
#endif
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <libutil.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
int
openpty(int *amaster, int *aslave, char *name, struct termios *termp,
struct winsize *winp)
{
const char *slavename;
int master, slave;
master = posix_openpt(O_RDWR);
if (master == -1)
return (-1);
if (grantpt(master) == -1) {
close(master);
return (-1);
}
slavename = ptsname(master);
if (slavename == NULL) {
close(master);
return (-1);
}
if (revoke(slavename) == -1) {
close(master);
return (-1);
}
slave = open(slavename, O_RDWR);
if (slave == -1) {
close(master);
return (-1);
}
if (unlockpt(master) == -1) {
close(master);
close(slave);
return (-1);
}
*amaster = master;
*aslave = slave;
if (name)
strcpy(name, slavename);
if (termp)
tcsetattr(slave, TCSAFLUSH, termp);
if (winp)
ioctl(slave, TIOCSWINSZ, (char *)winp);
return (0);
}
int
forkpty(int *amaster, char *name, struct termios *termp, struct winsize *winp)
{
int master, slave, pid;
if (openpty(&master, &slave, name, termp, winp) == -1)
return (-1);
switch (pid = fork()) {
case -1:
return (-1);
case 0:
/*
* child
*/
(void) close(master);
login_tty(slave);
return (0);
}
/*
* parent
*/
*amaster = master;
(void) close(slave);
return (pid);
}
|
