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/*
* Copyright (c) 2009 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <config.h>
#include <sys/types.h>
#include <sys/param.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
# include <memory.h>
# endif
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
#endif /* HAVE_STRING_H */
#ifdef HAVE_TERMIOS_H
# include <termios.h>
#else
# ifdef HAVE_TERMIO_H
# include <termio.h>
# else
# include <sgtty.h>
# include <sys/ioctl.h>
# endif /* HAVE_TERMIO_H */
#endif /* HAVE_TERMIOS_H */
#include "sudo.h"
#ifndef lint
__unused static const char rcsid[] = "$Sudo: term.c,v 1.4 2009/02/25 10:47:12 millert Exp $";
#endif /* lint */
#ifndef TCSASOFT
# define TCSASOFT 0
#endif
#ifndef ECHONL
# define ECHONL 0
#endif
#ifndef IEXTEN
# define IEXTEN 0
#endif
#ifndef _POSIX_VDISABLE
# ifdef VDISABLE
# define _POSIX_VDISABLE VDISABLE
# else
# define _POSIX_VDISABLE 0
# endif
#endif
/*
* Compat macros for non-termios systems.
*/
#ifndef HAVE_TERMIOS_H
# ifdef HAVE_TERMIO_H
# undef termios
# define termios termio
# define tcgetattr(f, t) ioctl(f, TCGETA, t)
# define tcsetattr(f, a, t) ioctl(f, a, t)
# undef TCSAFLUSH
# define TCSAFLUSH TCSETAF
# else /* SGTTY */
# undef termios
# define termios sgttyb
# define c_lflag sg_flags
# define tcgetattr(f, t) ioctl(f, TIOCGETP, t)
# define tcsetattr(f, a, t) ioctl(f, a, t)
# undef TCSAFLUSH
# define TCSAFLUSH TIOCSETP
# endif /* HAVE_TERMIO_H */
#endif /* HAVE_TERMIOS_H */
typedef struct termios sudo_term_t;
static sudo_term_t term, oterm;
static int changed;
int term_erase;
int term_kill;
int
term_restore(fd)
int fd;
{
if (changed) {
if (tcsetattr(fd, TCSAFLUSH|TCSASOFT, &oterm) != 0)
return(0);
changed = 0;
}
return(1);
}
int
term_noecho(fd)
int fd;
{
if (!changed && tcgetattr(fd, &oterm) != 0)
return(0);
(void) memcpy(&term, &oterm, sizeof(term));
CLR(term.c_lflag, ECHO|ECHONL);
#ifdef VSTATUS
term.c_cc[VSTATUS] = _POSIX_VDISABLE;
#endif
if (tcsetattr(fd, TCSAFLUSH|TCSASOFT, &term) == 0) {
changed = 1;
return(1);
}
return(0);
}
#if defined(HAVE_TERMIOS_H) || defined(HAVE_TERMIO_H)
int
term_raw(fd)
int fd;
{
if (!changed && tcgetattr(fd, &oterm) != 0)
return(0);
(void) memcpy(&term, &oterm, sizeof(term));
/* Set terminal to half-cooked mode */
term.c_cc[VMIN] = 1;
term.c_cc[VTIME] = 0;
CLR(term.c_lflag, ECHO | ECHONL | ICANON | IEXTEN);
SET(term.c_lflag, ISIG);
#ifdef VSTATUS
term.c_cc[VSTATUS] = _POSIX_VDISABLE;
#endif
if (tcsetattr(fd, TCSAFLUSH|TCSASOFT, &term) == 0) {
term_erase = term.c_cc[VERASE];
term_kill = term.c_cc[VKILL];
changed = 1;
return(1);
}
return(0);
}
#else /* SGTTY */
int
term_raw(fd)
int fd;
{
if (!changed && ioctl(fd, TIOCGETP, &oterm) != 0)
return(0);
(void) memcpy(&term, &oterm, sizeof(term));
/* Set terminal to half-cooked mode */
CLR(term.c_lflag, ECHO);
SET(term.sg_flags, CBREAK);
if (ioctl(fd, TIOCSETP, &term) == 0) {
term_erase = term.sg_erase;
term_kill = term.sg_kill;
changed = 1;
return(1);
}
return(0);
}
#endif
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