sysdeps/unix/bsd/tcsetattr.c

   1 /* Copyright (C) 1991, 1993, 1996 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <errno.h>
  20 #include <stddef.h>
  21 #include <termios.h>
  22
  23 #include "bsdtty.h"
  24
  25
  26 const speed_t __bsd_speeds[] =
  27   {
  28     0,
  29     50,
  30     75,
  31     110,
  32     134,
  33     150,
  34     200,
  35     300,
  36     600,
  37     1200,
  38     1800,
  39     2400,
  40     4800,
  41     9600,
  42     19200,
  43     38400,
  44   };
  45
  46
  47 /* Set the state of FD to *TERMIOS_P.  */
  48 int
  49 tcsetattr (fd, optional_actions, termios_p)
  50      int fd;
  51      int optional_actions;
  52      const struct termios *termios_p;
  53 {
  54   struct sgttyb buf;
  55   struct tchars tchars;
  56   struct ltchars ltchars;
  57   int local;
  58 #ifdef  TIOCGETX
  59   int extra;
  60 #endif
  61   size_t i;
  62
  63   if (__ioctl (fd, TIOCGETP, &buf) < 0 ||
  64       __ioctl (fd, TIOCGETC, &tchars) < 0 ||
  65       __ioctl (fd, TIOCGLTC, &ltchars) < 0 ||
  66 #ifdef  TIOCGETX
  67       __ioctl (fd, TIOCGETX, &extra) < 0 ||
  68 #endif
  69       __ioctl (fd, TIOCLGET, &local) < 0)
  70     return -1;
  71
  72   if (termios_p == NULL)
  73     {
  74       __set_errno (EINVAL);
  75       return -1;
  76     }
  77   switch (optional_actions)
  78     {
  79     case TCSANOW:
  80       break;
  81     case TCSADRAIN:
  82       if (tcdrain (fd) < 0)
  83         return -1;
  84       break;
  85     case TCSAFLUSH:
  86       if (tcflush (fd, TCIFLUSH) < 0)
  87         return -1;
  88       break;
  89     default:
  90       __set_errno (EINVAL);
  91       return -1;
  92     }
  93
  94   buf.sg_ispeed = buf.sg_ospeed = -1;
  95   for (i = 0; i <= sizeof (__bsd_speeds) / sizeof (__bsd_speeds[0]); ++i)
  96     {
  97       if (__bsd_speeds[i] == termios_p->__ispeed)
  98         buf.sg_ispeed = i;
  99       if (__bsd_speeds[i] == termios_p->__ospeed)
 100         buf.sg_ospeed = i;
 101     }
 102   if (buf.sg_ispeed == -1 || buf.sg_ospeed == -1)
 103     {
 104       __set_errno (EINVAL);
 105       return -1;
 106     }
 107
 108   buf.sg_flags &= ~(CBREAK|RAW);
 109   if (!(termios_p->c_lflag & ICANON))
 110     buf.sg_flags |= (termios_p->c_cflag & ISIG) ? CBREAK : RAW;
 111 #ifdef  LPASS8
 112   if (termios_p->c_oflag & CS8)
 113     local |= LPASS8;
 114   else
 115     local &= ~LPASS8;
 116 #endif
 117   if (termios_p->c_lflag & _NOFLSH)
 118     local |= LNOFLSH;
 119   else
 120     local &= ~LNOFLSH;
 121   if (termios_p->c_oflag & OPOST)
 122     local &= ~LLITOUT;
 123   else
 124     local |= LLITOUT;
 125 #ifdef  TIOCGETX
 126   if (termios_p->c_lflag & ISIG)
 127     extra &= ~NOISIG;
 128   else
 129     extra |= NOISIG;
 130   if (termios_p->c_cflag & CSTOPB)
 131     extra |= STOPB;
 132   else
 133     extra &= ~STOPB;
 134 #endif
 135   if (termios_p->c_iflag & ICRNL)
 136     buf.sg_flags |= CRMOD;
 137   else
 138     buf.sg_flags &= ~CRMOD;
 139   if (termios_p->c_iflag & IXOFF)
 140     buf.sg_flags |= TANDEM;
 141   else
 142     buf.sg_flags &= ~TANDEM;
 143
 144   buf.sg_flags &= ~(ODDP|EVENP);
 145   if (!(termios_p->c_cflag & PARENB))
 146     buf.sg_flags |= ODDP | EVENP;
 147   else if (termios_p->c_cflag & PARODD)
 148     buf.sg_flags |= ODDP;
 149   else
 150     buf.sg_flags |= EVENP;
 151
 152   if (termios_p->c_lflag & _ECHO)
 153     buf.sg_flags |= ECHO;
 154   else
 155     buf.sg_flags &= ~ECHO;
 156   if (termios_p->c_lflag & ECHOE)
 157     local |= LCRTERA;
 158   else
 159     local &= ~LCRTERA;
 160   if (termios_p->c_lflag & ECHOK)
 161     local |= LCRTKIL;
 162   else
 163     local &= ~LCRTKIL;
 164   if (termios_p->c_lflag & _TOSTOP)
 165     local |= LTOSTOP;
 166   else
 167     local &= ~LTOSTOP;
 168
 169   buf.sg_erase = termios_p->c_cc[VERASE];
 170   buf.sg_kill = termios_p->c_cc[VKILL];
 171   tchars.t_eofc = termios_p->c_cc[VEOF];
 172   tchars.t_intrc = termios_p->c_cc[VINTR];
 173   tchars.t_quitc = termios_p->c_cc[VQUIT];
 174   ltchars.t_suspc = termios_p->c_cc[VSUSP];
 175   tchars.t_startc = termios_p->c_cc[VSTART];
 176   tchars.t_stopc = termios_p->c_cc[VSTOP];
 177
 178   if (__ioctl (fd, TIOCSETP, &buf) < 0 ||
 179       __ioctl (fd, TIOCSETC, &tchars) < 0 ||
 180       __ioctl (fd, TIOCSLTC, &ltchars) < 0 ||
 181 #ifdef  TIOCGETX
 182       __ioctl (fd, TIOCSETX, &extra) < 0 ||
 183 #endif
 184       __ioctl (fd, TIOCLSET, &local) < 0)
 185     return -1;
 186   return 0;
 187 }