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1.1 ! root 1: #include <errno.h> ! 2: #include <termios.h> ! 3: ! 4: #include <linux/sched.h> ! 5: #include <linux/kernel.h> ! 6: #include <linux/tty.h> ! 7: ! 8: #include <asm/segment.h> ! 9: #include <asm/system.h> ! 10: ! 11: static void flush(struct tty_queue * queue) ! 12: { ! 13: cli(); ! 14: queue->head = queue->tail; ! 15: sti(); ! 16: } ! 17: ! 18: static void wait_until_sent(struct tty_struct * tty) ! 19: { ! 20: /* do nothing - not implemented */ ! 21: } ! 22: ! 23: static void send_break(struct tty_struct * tty) ! 24: { ! 25: /* do nothing - not implemented */ ! 26: } ! 27: ! 28: static int get_termios(struct tty_struct * tty, struct termios * termios) ! 29: { ! 30: int i; ! 31: ! 32: verify_area(termios, sizeof (*termios)); ! 33: for (i=0 ; i< (sizeof (*termios)) ; i++) ! 34: put_fs_byte( ((char *)&tty->termios)[i] , i+(char *)termios ); ! 35: return 0; ! 36: } ! 37: ! 38: static int set_termios(struct tty_struct * tty, struct termios * termios) ! 39: { ! 40: int i; ! 41: ! 42: for (i=0 ; i< (sizeof (*termios)) ; i++) ! 43: ((char *)&tty->termios)[i]=get_fs_byte(i+(char *)termios); ! 44: return 0; ! 45: } ! 46: ! 47: static int get_termio(struct tty_struct * tty, struct termio * termio) ! 48: { ! 49: int i; ! 50: struct termio tmp_termio; ! 51: ! 52: verify_area(termio, sizeof (*termio)); ! 53: tmp_termio.c_iflag = tty->termios.c_iflag; ! 54: tmp_termio.c_oflag = tty->termios.c_oflag; ! 55: tmp_termio.c_cflag = tty->termios.c_cflag; ! 56: tmp_termio.c_lflag = tty->termios.c_lflag; ! 57: tmp_termio.c_line = tty->termios.c_line; ! 58: for(i=0 ; i < NCC ; i++) ! 59: tmp_termio.c_cc[i] = tty->termios.c_cc[i]; ! 60: for (i=0 ; i< (sizeof (*termio)) ; i++) ! 61: put_fs_byte( ((char *)&tmp_termio)[i] , i+(char *)termio ); ! 62: return 0; ! 63: } ! 64: ! 65: static int set_termio(struct tty_struct * tty, struct termio * termio) ! 66: { ! 67: int i; ! 68: struct termio tmp_termio; ! 69: ! 70: for (i=0 ; i< (sizeof (*termio)) ; i++) ! 71: ((char *)&tmp_termio)[i]=get_fs_byte(i+(char *)termio); ! 72: *(unsigned short *)&tty->termios.c_iflag = tmp_termio.c_iflag; ! 73: *(unsigned short *)&tty->termios.c_oflag = tmp_termio.c_oflag; ! 74: *(unsigned short *)&tty->termios.c_cflag = tmp_termio.c_cflag; ! 75: *(unsigned short *)&tty->termios.c_lflag = tmp_termio.c_lflag; ! 76: tty->termios.c_line = tmp_termio.c_line; ! 77: for(i=0 ; i < NCC ; i++) ! 78: tty->termios.c_cc[i] = tmp_termio.c_cc[i]; ! 79: return 0; ! 80: } ! 81: ! 82: int tty_ioctl(int dev, int cmd, int arg) ! 83: { ! 84: struct tty_struct * tty; ! 85: if (MAJOR(dev) == 5) { ! 86: dev=current->tty; ! 87: if (dev<0) ! 88: panic("tty_ioctl: dev<0"); ! 89: } else ! 90: dev=MINOR(dev); ! 91: tty = dev + tty_table; ! 92: switch (cmd) { ! 93: case TCGETS: ! 94: return get_termios(tty,(struct termios *) arg); ! 95: case TCSETSF: ! 96: flush(&tty->read_q); /* fallthrough */ ! 97: case TCSETSW: ! 98: wait_until_sent(tty); /* fallthrough */ ! 99: case TCSETS: ! 100: return set_termios(tty,(struct termios *) arg); ! 101: case TCGETA: ! 102: return get_termio(tty,(struct termio *) arg); ! 103: case TCSETAF: ! 104: flush(&tty->read_q); /* fallthrough */ ! 105: case TCSETAW: ! 106: wait_until_sent(tty); /* fallthrough */ ! 107: case TCSETA: ! 108: return set_termio(tty,(struct termio *) arg); ! 109: case TCSBRK: ! 110: if (!arg) { ! 111: wait_until_sent(tty); ! 112: send_break(tty); ! 113: } ! 114: return 0; ! 115: case TCXONC: ! 116: return -EINVAL; /* not implemented */ ! 117: case TCFLSH: ! 118: if (arg==0) ! 119: flush(&tty->read_q); ! 120: else if (arg==1) ! 121: flush(&tty->write_q); ! 122: else if (arg==2) { ! 123: flush(&tty->read_q); ! 124: flush(&tty->write_q); ! 125: } else ! 126: return -EINVAL; ! 127: return 0; ! 128: case TIOCEXCL: ! 129: return -EINVAL; /* not implemented */ ! 130: case TIOCNXCL: ! 131: return -EINVAL; /* not implemented */ ! 132: case TIOCSCTTY: ! 133: return -EINVAL; /* set controlling term NI */ ! 134: case TIOCGPGRP: ! 135: verify_area((void *) arg,4); ! 136: put_fs_long(tty->pgrp,(unsigned long *) arg); ! 137: return 0; ! 138: case TIOCSPGRP: ! 139: tty->pgrp=get_fs_long((unsigned long *) arg); ! 140: return 0; ! 141: case TIOCOUTQ: ! 142: verify_area((void *) arg,4); ! 143: put_fs_long(CHARS(tty->write_q),(unsigned long *) arg); ! 144: return 0; ! 145: case TIOCSTI: ! 146: return -EINVAL; /* not implemented */ ! 147: case TIOCGWINSZ: ! 148: return -EINVAL; /* not implemented */ ! 149: case TIOCSWINSZ: ! 150: return -EINVAL; /* not implemented */ ! 151: case TIOCMGET: ! 152: return -EINVAL; /* not implemented */ ! 153: case TIOCMBIS: ! 154: return -EINVAL; /* not implemented */ ! 155: case TIOCMBIC: ! 156: return -EINVAL; /* not implemented */ ! 157: case TIOCMSET: ! 158: return -EINVAL; /* not implemented */ ! 159: case TIOCGSOFTCAR: ! 160: return -EINVAL; /* not implemented */ ! 161: case TIOCSSOFTCAR: ! 162: return -EINVAL; /* not implemented */ ! 163: default: ! 164: return -EINVAL; ! 165: } ! 166: }
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