termios/tcsetattr.c

   1 /* Copyright (C) 1991,95,96,2000,01,02 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <stddef.h>
  21 #include <termios.h>
  22
  23 static int bad_speed (speed_t speed);
  24
  25 /* Set the state of FD to *TERMIOS_P.  */
  26 int
  27 tcsetattr (int fd, int optional_actions, const struct termios *termios_p)
  28 {
  29   if (fd < 0)
  30     {
  31       __set_errno (EBADF);
  32       return -1;
  33     }
  34   if (termios_p == NULL)
  35     {
  36       __set_errno (EINVAL);
  37       return -1;
  38     }
  39   switch (optional_actions)
  40     {
  41     case TCSANOW:
  42     case TCSADRAIN:
  43     case TCSAFLUSH:
  44       break;
  45     default:
  46       __set_errno (EINVAL);
  47       return -1;
  48     }
  49
  50   if (bad_speed(termios_p->__ospeed) ||
  51       bad_speed(termios_p->__ispeed == 0 ?
  52                 termios_p->__ospeed : termios_p->__ispeed))
  53     {
  54       __set_errno (EINVAL);
  55       return -1;
  56     }
  57
  58   __set_errno (ENOSYS);
  59   return -1;
  60 }
  61 libc_hidden_def (tcsetattr)
  62
  63 /* Strychnine checking.  */
  64 static int
  65 bad_speed (speed_t speed)
  66 {
  67   switch (speed)
  68     {
  69     case B0:
  70     case B50:
  71     case B75:
  72     case B110:
  73     case B134:
  74     case B150:
  75     case B200:
  76     case B300:
  77     case B600:
  78     case B1200:
  79     case B1800:
  80     case B2400:
  81     case B4800:
  82     case B9600:
  83     case B19200:
  84     case B38400:
  85     case B57600:
  86     case B115200:
  87     case B230400:
  88     case B460800:
  89     case B500000:
  90     case B576000:
  91     case B921600:
  92     case B1000000:
  93     case B1152000:
  94     case B1500000:
  95     case B2000000:
  96     case B2500000:
  97     case B3000000:
  98     case B3500000:
  99     case B4000000:
 100       return 0;
 101     default:
 102       return 1;
 103     }
 104 }
 105
 106
 107 stub_warning (tcsetattr)
 108 #include <stub-tag.h>