arch/sparc/kernel/termios.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/termios_internal.h>
   3
   4 /*
   5  * c_cc characters in the termio structure.  Oh, how I love being
   6  * backwardly compatible.  Notice that character 4 and 5 are
   7  * interpreted differently depending on whether ICANON is set in
   8  * c_lflag.  If it's set, they are used as _VEOF and _VEOL, otherwise
   9  * as _VMIN and V_TIME.  This is for compatibility with OSF/1 (which
  10  * is compatible with sysV)...
  11  */
  12 #define _VMIN   4
  13 #define _VTIME  5
  14
  15 int kernel_termios_to_user_termio(struct termio __user *termio,
  16                                                 struct ktermios *termios)
  17 {
  18         struct termio v;
  19         memset(&v, 0, sizeof(struct termio));
  20         v.c_iflag = termios->c_iflag;
  21         v.c_oflag = termios->c_oflag;
  22         v.c_cflag = termios->c_cflag;
  23         v.c_lflag = termios->c_lflag;
  24         v.c_line = termios->c_line;
  25         memcpy(v.c_cc, termios->c_cc, NCC);
  26         if (!(v.c_lflag & ICANON)) {
  27                 v.c_cc[_VMIN] = termios->c_cc[VMIN];
  28                 v.c_cc[_VTIME] = termios->c_cc[VTIME];
  29         }
  30         return copy_to_user(termio, &v, sizeof(struct termio));
  31 }
  32
  33 int user_termios_to_kernel_termios(struct ktermios *k,
  34                                                  struct termios2 __user *u)
  35 {
  36         int err;
  37         err  = get_user(k->c_iflag, &u->c_iflag);
  38         err |= get_user(k->c_oflag, &u->c_oflag);
  39         err |= get_user(k->c_cflag, &u->c_cflag);
  40         err |= get_user(k->c_lflag, &u->c_lflag);
  41         err |= get_user(k->c_line,  &u->c_line);
  42         err |= copy_from_user(k->c_cc, u->c_cc, NCCS);
  43         if (k->c_lflag & ICANON) {
  44                 err |= get_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
  45                 err |= get_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
  46         } else {
  47                 err |= get_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);
  48                 err |= get_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
  49         }
  50         err |= get_user(k->c_ispeed,  &u->c_ispeed);
  51         err |= get_user(k->c_ospeed,  &u->c_ospeed);
  52         return err;
  53 }
  54
  55 int kernel_termios_to_user_termios(struct termios2 __user *u,
  56                                                  struct ktermios *k)
  57 {
  58         int err;
  59         err  = put_user(k->c_iflag, &u->c_iflag);
  60         err |= put_user(k->c_oflag, &u->c_oflag);
  61         err |= put_user(k->c_cflag, &u->c_cflag);
  62         err |= put_user(k->c_lflag, &u->c_lflag);
  63         err |= put_user(k->c_line, &u->c_line);
  64         err |= copy_to_user(u->c_cc, k->c_cc, NCCS);
  65         if (!(k->c_lflag & ICANON)) {
  66                 err |= put_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);
  67                 err |= put_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
  68         } else {
  69                 err |= put_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
  70                 err |= put_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
  71         }
  72         err |= put_user(k->c_ispeed, &u->c_ispeed);
  73         err |= put_user(k->c_ospeed, &u->c_ospeed);
  74         return err;
  75 }
  76
  77 int user_termios_to_kernel_termios_1(struct ktermios *k,
  78                                                  struct termios __user *u)
  79 {
  80         int err;
  81         err  = get_user(k->c_iflag, &u->c_iflag);
  82         err |= get_user(k->c_oflag, &u->c_oflag);
  83         err |= get_user(k->c_cflag, &u->c_cflag);
  84         err |= get_user(k->c_lflag, &u->c_lflag);
  85         err |= get_user(k->c_line,  &u->c_line);
  86         err |= copy_from_user(k->c_cc, u->c_cc, NCCS);
  87         if (k->c_lflag & ICANON) {
  88                 err |= get_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
  89                 err |= get_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
  90         } else {
  91                 err |= get_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);
  92                 err |= get_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
  93         }
  94         return err;
  95 }
  96
  97 int kernel_termios_to_user_termios_1(struct termios __user *u,
  98                                                  struct ktermios *k)
  99 {
 100         int err;
 101         err  = put_user(k->c_iflag, &u->c_iflag);
 102         err |= put_user(k->c_oflag, &u->c_oflag);
 103         err |= put_user(k->c_cflag, &u->c_cflag);
 104         err |= put_user(k->c_lflag, &u->c_lflag);
 105         err |= put_user(k->c_line, &u->c_line);
 106         err |= copy_to_user(u->c_cc, k->c_cc, NCCS);
 107         if (!(k->c_lflag & ICANON)) {
 108                 err |= put_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);
 109                 err |= put_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
 110         } else {
 111                 err |= put_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
 112                 err |= put_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
 113         }
 114         return err;
 115 }