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/*
* No copyright is claimed. This code is in the public domain; do with
* it what you wish.
*
* Written by Karel Zak <kzak@redhat.com>
*/
#ifndef UTIL_LINUX_TTYUTILS_H
#define UTIL_LINUX_TTYUTILS_H
#include <stdlib.h>
#include <termios.h>
#include <limits.h>
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_TTYDEFAULTS_H
#include <sys/ttydefaults.h>
#endif
#ifdef USE_TTY_GROUP
# define TTY_MODE 0620
#else
# define TTY_MODE 0600
#endif
#define TTYGRPNAME "tty" /* name of group to own ttys */
/* Some shorthands for control characters. */
#define CTL(x) ((x) ^ 0100) /* Assumes ASCII dialect */
#define CR CTL('M') /* carriage return */
#define NL CTL('J') /* line feed */
#define BS CTL('H') /* back space */
#define DEL CTL('?') /* delete */
/* Defaults for line-editing etc. characters; you may want to change these. */
#define DEF_ERASE DEL /* default erase character */
#define DEF_INTR CTL('C') /* default interrupt character */
#define DEF_QUIT CTL('\\') /* default quit char */
#define DEF_KILL CTL('U') /* default kill char */
#define DEF_EOF CTL('D') /* default EOF char */
#define DEF_EOL 0
#define DEF_SWITCH 0 /* default switch char */
/* Fallback for termios->c_cc[] */
#ifndef CREPRINT
# define CREPRINT ('r' & 037)
#endif
#ifndef CDISCARD
# define CDISCARD ('o' & 037)
#endif
/* Default termios->iflag */
#ifndef TTYDEF_IFLAG
# define TTYDEF_IFLAG (BRKINT | ICRNL | IMAXBEL | IXON | IXANY)
#endif
/* Default termios->oflag */
#ifndef TTYDEF_OFLAG
# define TTYDEF_OFLAG (OPOST | ONLCR /*| OXTABS*/)
#endif
/* Default termios->lflag */
#ifndef TTYDEF_LFLAG
# define TTYDEF_LFLAG (ECHO | ICANON | ISIG | IEXTEN | ECHOE|ECHOKE|ECHOCTL)
#endif
/* Default termios->cflag */
#ifndef TTYDEF_CFLAG
# define TTYDEF_CFLAG (CREAD | CS8 | HUPCL)
#endif
/* Storage for things detected while the login name was read. */
struct chardata {
int erase; /* erase character */
int kill; /* kill character */
int eol; /* end-of-line character */
int parity; /* what parity did we see */
int capslock; /* upper case without lower case */
};
#define INIT_CHARDATA(ptr) do { \
(ptr)->erase = DEF_ERASE; \
(ptr)->kill = DEF_KILL; \
(ptr)->eol = CR; \
(ptr)->parity = 0; \
(ptr)->capslock = 0; \
} while (0)
extern int get_terminal_dimension(int *cols, int *lines);
extern int get_terminal_width(int default_width);
extern int get_terminal_type(const char **type);
extern int get_terminal_stdfd(void);
extern int get_terminal_name(const char **path, const char **name,
const char **number);
#define UL_TTY_KEEPCFLAGS (1 << 1)
#define UL_TTY_UTF8 (1 << 2)
static inline void reset_virtual_console(struct termios *tp, int flags)
{
/* Use defaults of <sys/ttydefaults.h> for base settings */
tp->c_iflag |= TTYDEF_IFLAG;
tp->c_oflag |= TTYDEF_OFLAG;
tp->c_lflag |= TTYDEF_LFLAG;
if ((flags & UL_TTY_KEEPCFLAGS) == 0) {
#ifdef CBAUD
tp->c_lflag &= ~CBAUD;
#endif
tp->c_cflag |= (B38400 | TTYDEF_CFLAG);
}
/* Sane setting, allow eight bit characters, no carriage return delay
* the same result as `stty sane cr0 pass8'
*/
#ifndef IUCLC
# define IUCLC 0
#endif
#ifndef NL0
# define NL0 0
#endif
#ifndef CR0
# define CR0 0
#endif
#ifndef BS0
# define BS0 0
#endif
#ifndef VT0
# define VT0 0
#endif
#ifndef FF0
# define FF0 0
#endif
#ifndef OLCUC
# define OLCUC 0
#endif
#ifndef OFILL
# define OFILL 0
#endif
#ifndef NLDLY
# define NLDLY 0
#endif
#ifndef CRDLY
# define CRDLY 0
#endif
#ifndef BSDLY
# define BSDLY 0
#endif
#ifndef VTDLY
# define VTDLY 0
#endif
#ifndef FFDLY
# define FFDLY 0
#endif
#ifndef TAB0
# define TAB0 0
#endif
#ifndef TABDLY
# define TABDLY 0
#endif
tp->c_iflag |= (BRKINT | ICRNL | IMAXBEL);
tp->c_iflag &= ~(IGNBRK | INLCR | IGNCR | IXOFF | IUCLC | IXANY | ISTRIP);
tp->c_oflag |= (OPOST | ONLCR | NL0 | CR0 | TAB0 | BS0 | VT0 | FF0);
tp->c_oflag &= ~(OLCUC | OCRNL | ONOCR | ONLRET | OFILL | \
NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
tp->c_lflag |= (ISIG | ICANON | IEXTEN | ECHO|ECHOE|ECHOK|ECHOKE|ECHOCTL);
tp->c_lflag &= ~(ECHONL|ECHOPRT | NOFLSH | TOSTOP);
if ((flags & UL_TTY_KEEPCFLAGS) == 0) {
tp->c_cflag |= (CREAD | CS8 | HUPCL);
tp->c_cflag &= ~(PARODD | PARENB);
}
#ifdef OFDEL
tp->c_oflag &= ~OFDEL;
#endif
#ifdef XCASE
tp->c_lflag &= ~XCASE;
#endif
#ifdef IUTF8
if (flags & UL_TTY_UTF8)
tp->c_iflag |= IUTF8; /* Set UTF-8 input flag */
else
tp->c_iflag &= ~IUTF8;
#endif
/* VTIME and VMIN can overlap with VEOF and VEOL since they are
* only used for non-canonical mode. We just set the at the
* beginning, so nothing bad should happen.
*/
tp->c_cc[VTIME] = 0;
tp->c_cc[VMIN] = 1;
tp->c_cc[VINTR] = CINTR;
tp->c_cc[VQUIT] = CQUIT;
tp->c_cc[VERASE] = CERASE; /* ASCII DEL (0177) */
tp->c_cc[VKILL] = CKILL;
tp->c_cc[VEOF] = CEOF;
#ifdef VSWTC
tp->c_cc[VSWTC] = _POSIX_VDISABLE;
#elif defined(VSWTCH)
tp->c_cc[VSWTCH] = _POSIX_VDISABLE;
#endif
tp->c_cc[VSTART] = CSTART;
tp->c_cc[VSTOP] = CSTOP;
tp->c_cc[VSUSP] = CSUSP;
tp->c_cc[VEOL] = _POSIX_VDISABLE;
tp->c_cc[VREPRINT] = CREPRINT;
tp->c_cc[VDISCARD] = CDISCARD;
tp->c_cc[VWERASE] = CWERASE;
tp->c_cc[VLNEXT] = CLNEXT;
tp->c_cc[VEOL2] = _POSIX_VDISABLE;
}
#endif /* UTIL_LINUX_TTYUTILS_H */