freebsd-src/bin/stty/key.c
Ed Schouten 736fc28680 Add a new libc function: cfmakesane(3).
I've noticed various terminal emulators that need to obtain a sane
default termios structure use very complex `hacks'. Even though POSIX
doesn't provide any functionality for this, extend our termios API with
cfmakesane(3), which is similar to the commonly supported cfmakeraw(3),
except that it fills the termios structure with sane defaults.

Change all code in our base system to use this function, instead of
depending on <sys/ttydefaults.h> to provide TTYDEF_*.
2010-11-02 17:00:56 +00:00

295 lines
6.1 KiB
C

/*-
* Copyright (c) 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)key.c 8.3 (Berkeley) 4/2/94";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "stty.h"
#include "extern.h"
__BEGIN_DECLS
static int c_key(const void *, const void *);
void f_all(struct info *);
void f_cbreak(struct info *);
void f_columns(struct info *);
void f_dec(struct info *);
void f_ek(struct info *);
void f_everything(struct info *);
void f_extproc(struct info *);
void f_ispeed(struct info *);
void f_nl(struct info *);
void f_ospeed(struct info *);
void f_raw(struct info *);
void f_rows(struct info *);
void f_sane(struct info *);
void f_size(struct info *);
void f_speed(struct info *);
void f_tty(struct info *);
__END_DECLS
static struct key {
const char *name; /* name */
void (*f)(struct info *); /* function */
#define F_NEEDARG 0x01 /* needs an argument */
#define F_OFFOK 0x02 /* can turn off */
int flags;
} keys[] = {
{ "all", f_all, 0 },
{ "cbreak", f_cbreak, F_OFFOK },
{ "cols", f_columns, F_NEEDARG },
{ "columns", f_columns, F_NEEDARG },
{ "cooked", f_sane, 0 },
{ "dec", f_dec, 0 },
{ "ek", f_ek, 0 },
{ "everything", f_everything, 0 },
{ "extproc", f_extproc, F_OFFOK },
{ "ispeed", f_ispeed, F_NEEDARG },
{ "new", f_tty, 0 },
{ "nl", f_nl, F_OFFOK },
{ "old", f_tty, 0 },
{ "ospeed", f_ospeed, F_NEEDARG },
{ "raw", f_raw, F_OFFOK },
{ "rows", f_rows, F_NEEDARG },
{ "sane", f_sane, 0 },
{ "size", f_size, 0 },
{ "speed", f_speed, 0 },
{ "tty", f_tty, 0 },
};
static int
c_key(const void *a, const void *b)
{
return (strcmp(((const struct key *)a)->name, ((const struct key *)b)->name));
}
int
ksearch(char ***argvp, struct info *ip)
{
char *name;
struct key *kp, tmp;
name = **argvp;
if (*name == '-') {
ip->off = 1;
++name;
} else
ip->off = 0;
tmp.name = name;
if (!(kp = (struct key *)bsearch(&tmp, keys,
sizeof(keys)/sizeof(struct key), sizeof(struct key), c_key)))
return (0);
if (!(kp->flags & F_OFFOK) && ip->off) {
warnx("illegal option -- -%s", name);
usage();
}
if (kp->flags & F_NEEDARG && !(ip->arg = *++*argvp)) {
warnx("option requires an argument -- %s", name);
usage();
}
kp->f(ip);
return (1);
}
void
f_all(struct info *ip)
{
print(&ip->t, &ip->win, ip->ldisc, BSD);
}
void
f_cbreak(struct info *ip)
{
if (ip->off)
f_sane(ip);
else {
ip->t.c_iflag |= BRKINT|IXON|IMAXBEL;
ip->t.c_oflag |= OPOST;
ip->t.c_lflag |= ISIG|IEXTEN;
ip->t.c_lflag &= ~ICANON;
ip->set = 1;
}
}
void
f_columns(struct info *ip)
{
ip->win.ws_col = atoi(ip->arg);
ip->wset = 1;
}
void
f_dec(struct info *ip)
{
ip->t.c_cc[VERASE] = (u_char)0177;
ip->t.c_cc[VKILL] = CTRL('u');
ip->t.c_cc[VINTR] = CTRL('c');
ip->t.c_lflag &= ~ECHOPRT;
ip->t.c_lflag |= ECHOE|ECHOKE|ECHOCTL;
ip->t.c_iflag &= ~IXANY;
ip->set = 1;
}
void
f_ek(struct info *ip)
{
ip->t.c_cc[VERASE] = CERASE;
ip->t.c_cc[VKILL] = CKILL;
ip->set = 1;
}
void
f_everything(struct info *ip)
{
print(&ip->t, &ip->win, ip->ldisc, BSD);
}
void
f_extproc(struct info *ip)
{
if (ip->off) {
int tmp = 0;
(void)ioctl(ip->fd, TIOCEXT, &tmp);
} else {
int tmp = 1;
(void)ioctl(ip->fd, TIOCEXT, &tmp);
}
}
void
f_ispeed(struct info *ip)
{
cfsetispeed(&ip->t, (speed_t)atoi(ip->arg));
ip->set = 1;
}
void
f_nl(struct info *ip)
{
if (ip->off) {
ip->t.c_iflag |= ICRNL;
ip->t.c_oflag |= ONLCR;
} else {
ip->t.c_iflag &= ~ICRNL;
ip->t.c_oflag &= ~ONLCR;
}
ip->set = 1;
}
void
f_ospeed(struct info *ip)
{
cfsetospeed(&ip->t, (speed_t)atoi(ip->arg));
ip->set = 1;
}
void
f_raw(struct info *ip)
{
if (ip->off)
f_sane(ip);
else {
cfmakeraw(&ip->t);
ip->t.c_cflag &= ~(CSIZE|PARENB);
ip->t.c_cflag |= CS8;
ip->set = 1;
}
}
void
f_rows(struct info *ip)
{
ip->win.ws_row = atoi(ip->arg);
ip->wset = 1;
}
void
f_sane(struct info *ip)
{
struct termios def;
cfmakesane(&def);
ip->t.c_cflag = def.c_cflag | (ip->t.c_cflag & CLOCAL);
ip->t.c_iflag = def.c_iflag;
/* preserve user-preference flags in lflag */
#define LKEEP (ECHOKE|ECHOE|ECHOK|ECHOPRT|ECHOCTL|ALTWERASE|TOSTOP|NOFLSH)
ip->t.c_lflag = def.c_lflag | (ip->t.c_lflag & LKEEP);
ip->t.c_oflag = def.c_oflag;
ip->set = 1;
}
void
f_size(struct info *ip)
{
(void)printf("%d %d\n", ip->win.ws_row, ip->win.ws_col);
}
void
f_speed(struct info *ip)
{
(void)printf("%lu\n", (u_long)cfgetospeed(&ip->t));
}
void
f_tty(struct info *ip)
{
int tmp;
tmp = TTYDISC;
if (ioctl(ip->fd, TIOCSETD, &tmp) < 0)
err(1, "TIOCSETD");
}