sysdeps/unix/bsd/tcgetattr.c

   1 /* Copyright (C) 1991, 1992, 1995, 1996, 1997 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 #include "bsdtty.h"
  24
  25 extern const speed_t __bsd_speeds[]; /* Defined in tcsetattr.c.  */
  26
  27 /* Put the state of FD into *TERMIOS_P.  */
  28 int
  29 __tcgetattr (fd, termios_p)
  30      int fd;
  31      struct termios *termios_p;
  32 {
  33   struct sgttyb buf;
  34   struct tchars tchars;
  35   struct ltchars ltchars;
  36   int local;
  37 #ifdef  TIOCGETX
  38   int extra;
  39 #endif
  40
  41   if (termios_p == NULL)
  42     {
  43       __set_errno (EINVAL);
  44       return -1;
  45     }
  46
  47   if (__ioctl(fd, TIOCGETP, &buf) < 0 ||
  48       __ioctl(fd, TIOCGETC, &tchars) < 0 ||
  49       __ioctl(fd, TIOCGLTC, &ltchars) < 0 ||
  50 #ifdef  TIOCGETX
  51       __ioctl(fd, TIOCGETX, &extra) < 0 ||
  52 #endif
  53       __ioctl(fd, TIOCLGET, &local) < 0)
  54     return -1;
  55
  56   termios_p->__ispeed = __bsd_speeds[(unsigned char) buf.sg_ispeed];
  57   termios_p->__ospeed = __bsd_speeds[(unsigned char) buf.sg_ospeed];
  58
  59   termios_p->c_iflag = 0;
  60   termios_p->c_oflag = 0;
  61   termios_p->c_cflag = 0;
  62   termios_p->c_lflag = 0;
  63   termios_p->c_oflag |= CREAD | HUPCL;
  64 #ifdef  LPASS8
  65   if (local & LPASS8)
  66     termios_p->c_oflag |= CS8;
  67   else
  68 #endif
  69     termios_p->c_oflag |= CS7;
  70   if (!(buf.sg_flags & RAW))
  71     {
  72       termios_p->c_iflag |= IXON;
  73       termios_p->c_cflag |= OPOST;
  74 #ifndef NOISIG
  75       termios_p->c_lflag |= ISIG;
  76 #endif
  77     }
  78   if ((buf.sg_flags & (CBREAK|RAW)) == 0)
  79     termios_p->c_lflag |= ICANON;
  80   if (!(buf.sg_flags & RAW) && !(local & LLITOUT))
  81     termios_p->c_oflag |= OPOST;
  82   if (buf.sg_flags & CRMOD)
  83     termios_p->c_iflag |= ICRNL;
  84   if (buf.sg_flags & TANDEM)
  85     termios_p->c_iflag |= IXOFF;
  86 #ifdef  TIOCGETX
  87   if (!(extra & NOISIG))
  88     termios_p->c_lflag |= ISIG;
  89   if (extra & STOPB)
  90     termios_p->c_cflag |= CSTOPB;
  91 #endif
  92
  93   switch (buf.sg_flags & (EVENP|ODDP))
  94     {
  95     case EVENP|ODDP:
  96       break;
  97     case ODDP:
  98       termios_p->c_cflag |= PARODD;
  99     default:
 100       termios_p->c_cflag |= PARENB;
 101       termios_p->c_iflag |= IGNPAR | INPCK;
 102       break;
 103     }
 104   if (buf.sg_flags & ECHO)
 105     termios_p->c_lflag |= _ECHO;
 106   if (local & LCRTERA)
 107     termios_p->c_lflag |= ECHOE;
 108   if (local & LCRTKIL)
 109     termios_p->c_lflag |= ECHOK;
 110   if (local & LTOSTOP)
 111     termios_p->c_lflag |= _TOSTOP;
 112   if (local & LNOFLSH)
 113     termios_p->c_lflag |= _NOFLSH;
 114
 115   termios_p->c_cc[VEOF] = tchars.t_eofc;
 116   termios_p->c_cc[VEOL] = '\n';
 117   termios_p->c_cc[VERASE] = buf.sg_erase;
 118   termios_p->c_cc[VKILL] = buf.sg_kill;
 119   termios_p->c_cc[VINTR] = tchars.t_intrc;
 120   termios_p->c_cc[VQUIT] = tchars.t_quitc;
 121   termios_p->c_cc[VSTART] = tchars.t_startc;
 122   termios_p->c_cc[VSTOP] = tchars.t_stopc;
 123   termios_p->c_cc[VSUSP] = ltchars.t_suspc;
 124   termios_p->c_cc[VMIN] = -1;
 125   termios_p->c_cc[VTIME] = -1;
 126
 127   return 0;
 128 }
 129
 130 weak_alias (__tcgetattr, tcgetattr)