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c9874d3ffe
* new header (linut/termios_internal.h), pulled by the users of those suckers * defaults for INIT_C_CC and externs for conversion helpers moved over there * remove termios-base.h (empty now) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Link: https://lore.kernel.org/r/YxDmptU7dNGZ+/Hn@ZenIV Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/termios_internal.h>
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/*
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* c_cc characters in the termio structure. Oh, how I love being
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* backwardly compatible. Notice that character 4 and 5 are
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* interpreted differently depending on whether ICANON is set in
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* c_lflag. If it's set, they are used as _VEOF and _VEOL, otherwise
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* as _VMIN and V_TIME. This is for compatibility with OSF/1 (which
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* is compatible with sysV)...
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*/
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#define _VMIN 4
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#define _VTIME 5
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int kernel_termios_to_user_termio(struct termio __user *termio,
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struct ktermios *termios)
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{
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struct termio v;
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memset(&v, 0, sizeof(struct termio));
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v.c_iflag = termios->c_iflag;
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v.c_oflag = termios->c_oflag;
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v.c_cflag = termios->c_cflag;
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v.c_lflag = termios->c_lflag;
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v.c_line = termios->c_line;
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memcpy(v.c_cc, termios->c_cc, NCC);
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if (!(v.c_lflag & ICANON)) {
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v.c_cc[_VMIN] = termios->c_cc[VMIN];
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v.c_cc[_VTIME] = termios->c_cc[VTIME];
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}
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return copy_to_user(termio, &v, sizeof(struct termio));
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}
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int user_termios_to_kernel_termios(struct ktermios *k,
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struct termios2 __user *u)
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{
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int err;
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err = get_user(k->c_iflag, &u->c_iflag);
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err |= get_user(k->c_oflag, &u->c_oflag);
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err |= get_user(k->c_cflag, &u->c_cflag);
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err |= get_user(k->c_lflag, &u->c_lflag);
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err |= get_user(k->c_line, &u->c_line);
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err |= copy_from_user(k->c_cc, u->c_cc, NCCS);
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if (k->c_lflag & ICANON) {
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err |= get_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
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err |= get_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
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} else {
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err |= get_user(k->c_cc[VMIN], &u->c_cc[_VMIN]);
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err |= get_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
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}
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err |= get_user(k->c_ispeed, &u->c_ispeed);
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err |= get_user(k->c_ospeed, &u->c_ospeed);
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return err;
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}
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int kernel_termios_to_user_termios(struct termios2 __user *u,
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struct ktermios *k)
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{
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int err;
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err = put_user(k->c_iflag, &u->c_iflag);
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err |= put_user(k->c_oflag, &u->c_oflag);
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err |= put_user(k->c_cflag, &u->c_cflag);
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err |= put_user(k->c_lflag, &u->c_lflag);
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err |= put_user(k->c_line, &u->c_line);
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err |= copy_to_user(u->c_cc, k->c_cc, NCCS);
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if (!(k->c_lflag & ICANON)) {
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err |= put_user(k->c_cc[VMIN], &u->c_cc[_VMIN]);
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err |= put_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
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} else {
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err |= put_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
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err |= put_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
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}
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err |= put_user(k->c_ispeed, &u->c_ispeed);
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err |= put_user(k->c_ospeed, &u->c_ospeed);
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return err;
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}
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int user_termios_to_kernel_termios_1(struct ktermios *k,
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struct termios __user *u)
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{
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int err;
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err = get_user(k->c_iflag, &u->c_iflag);
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err |= get_user(k->c_oflag, &u->c_oflag);
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err |= get_user(k->c_cflag, &u->c_cflag);
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err |= get_user(k->c_lflag, &u->c_lflag);
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err |= get_user(k->c_line, &u->c_line);
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err |= copy_from_user(k->c_cc, u->c_cc, NCCS);
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if (k->c_lflag & ICANON) {
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err |= get_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
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err |= get_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
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} else {
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err |= get_user(k->c_cc[VMIN], &u->c_cc[_VMIN]);
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err |= get_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
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}
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return err;
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}
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int kernel_termios_to_user_termios_1(struct termios __user *u,
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struct ktermios *k)
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{
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int err;
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err = put_user(k->c_iflag, &u->c_iflag);
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err |= put_user(k->c_oflag, &u->c_oflag);
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err |= put_user(k->c_cflag, &u->c_cflag);
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err |= put_user(k->c_lflag, &u->c_lflag);
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err |= put_user(k->c_line, &u->c_line);
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err |= copy_to_user(u->c_cc, k->c_cc, NCCS);
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if (!(k->c_lflag & ICANON)) {
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err |= put_user(k->c_cc[VMIN], &u->c_cc[_VMIN]);
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err |= put_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
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} else {
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err |= put_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
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err |= put_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
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}
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return err;
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}
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