1  /* Copyright (C) 1991-2023 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
      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  }
      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)