1 /* Copyright (C) 1991-2022 Free Software Foundation, Inc.
2    This file is part of the GNU C Library.
3 
4    The GNU C Library is free software; you can redistribute it and/or
5    modify it under the terms of the GNU Lesser General Public
6    License as published by the Free Software Foundation; either
7    version 2.1 of the License, or (at your option) any later version.
8 
9    The GNU C Library is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12    Lesser General Public License for more details.
13 
14    You should have received a copy of the GNU Lesser General Public
15    License along with the GNU C Library; if not, see
16    <https://www.gnu.org/licenses/>.  */
17 
18 #include <errno.h>
19 #include <stddef.h>
20 #include <termios.h>
21 
22 static int bad_speed (speed_t speed);
23 
24 /* Set the state of FD to *TERMIOS_P.  */
25 int
tcsetattr(int fd,int optional_actions,const struct termios * termios_p)26 tcsetattr (int fd, int optional_actions, const struct termios *termios_p)
27 {
28   if (fd < 0)
29     {
30       __set_errno (EBADF);
31       return -1;
32     }
33   if (termios_p == NULL)
34     {
35       __set_errno (EINVAL);
36       return -1;
37     }
38   switch (optional_actions)
39     {
40     case TCSANOW:
41     case TCSADRAIN:
42     case TCSAFLUSH:
43       break;
44     default:
45       __set_errno (EINVAL);
46       return -1;
47     }
48 
49   if (bad_speed(termios_p->__ospeed)
50       || bad_speed(termios_p->__ispeed == 0
51 		   ? termios_p->__ospeed : termios_p->__ispeed))
52     {
53       __set_errno (EINVAL);
54       return -1;
55     }
56 
57   __set_errno (ENOSYS);
58   return -1;
59 }
libc_hidden_def(tcsetattr)60 libc_hidden_def (tcsetattr)
61 
62 /* Strychnine checking.  */
63 static int
64 bad_speed (speed_t speed)
65 {
66   switch (speed)
67     {
68     case B0:
69     case B50:
70     case B75:
71     case B110:
72     case B134:
73     case B150:
74     case B200:
75     case B300:
76     case B600:
77     case B1200:
78     case B1800:
79     case B2400:
80     case B4800:
81     case B9600:
82     case B19200:
83     case B38400:
84     case B57600:
85     case B115200:
86     case B230400:
87     case B460800:
88     case B500000:
89     case B576000:
90     case B921600:
91     case B1000000:
92     case B1152000:
93     case B1500000:
94     case B2000000:
95     case B2500000:
96     case B3000000:
97     case B3500000:
98     case B4000000:
99       return 0;
100     default:
101       return 1;
102     }
103 }
104 
105 
106 stub_warning (tcsetattr)
107