mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-06-12 15:29:29 +00:00
784e3de7cd
passwd, ps, purge, shutdown, stty, upper, and vi. These sources are for the versions of the utils shipped with GNO v2.0.4.
713 lines
13 KiB
C
713 lines
13 KiB
C
/*
|
|
* Routines which deal with the characteristics of the terminal.
|
|
* Uses termcap to be as terminal-independent as possible.
|
|
*
|
|
* {{ Someday this should be rewritten to use curses. }}
|
|
*/
|
|
#pragma noroot
|
|
#include <string.h>
|
|
#include "less.h"
|
|
#if XENIX
|
|
#include <sys/types.h>
|
|
#include <sys/ioctl.h>
|
|
#endif
|
|
|
|
#ifdef _ORCAC_
|
|
segment "LoadSegONE";
|
|
#endif
|
|
|
|
#if TERMIO
|
|
#include <termio.h>
|
|
#else
|
|
#include <sgtty.h>
|
|
#endif
|
|
|
|
#if !TERMIO && defined(TIOCGWINSZ)
|
|
#include <sys/ioctl.h>
|
|
#else
|
|
/*
|
|
* For the Unix PC (ATT 7300 & 3B1):
|
|
* Since WIOCGETD is defined in sys/window.h, we can't use that to decide
|
|
* whether to include sys/window.h. Use SIGPHONE from signal.h instead.
|
|
*/
|
|
#include <signal.h>
|
|
#ifdef SIGPHONE
|
|
#include <sys/window.h>
|
|
#endif
|
|
#endif
|
|
|
|
#if NEED_PTEM_H && defined(TIOCGWINSZ)
|
|
/*
|
|
* All this just to get struct winsize. Sigh.
|
|
*/
|
|
#include <sys/types.h>
|
|
#include <sys/stream.h>
|
|
#include <sys/ptem.h>
|
|
#endif
|
|
|
|
/*
|
|
* Strings passed to tputs() to do various terminal functions.
|
|
*/
|
|
static char
|
|
*sc_pad, /* Pad string */
|
|
*sc_home, /* Cursor home */
|
|
*sc_addline, /* Add line, scroll down following lines */
|
|
*sc_lower_left, /* Cursor to last line, first column */
|
|
*sc_move, /* General cursor positioning */
|
|
*sc_clear, /* Clear screen */
|
|
*sc_eol_clear, /* Clear to end of line */
|
|
*sc_s_in, /* Enter standout (highlighted) mode */
|
|
*sc_s_out, /* Exit standout mode */
|
|
*sc_u_in, /* Enter underline mode */
|
|
*sc_u_out, /* Exit underline mode */
|
|
*sc_b_in, /* Enter bold mode */
|
|
*sc_b_out, /* Exit bold mode */
|
|
*sc_bl_in, /* Enter blink mode */
|
|
*sc_bl_out, /* Exit blink mode */
|
|
*sc_visual_bell, /* Visual bell (flash screen) sequence */
|
|
*sc_backspace, /* Backspace cursor */
|
|
*sc_init, /* Startup terminal initialization */
|
|
*sc_deinit; /* Exit terminal de-initialization */
|
|
|
|
static int init_done = 0;
|
|
|
|
public int auto_wrap; /* Terminal does \r\n when write past margin */
|
|
public int ignaw; /* Terminal ignores \n immediately after wrap */
|
|
public int erase_char, kill_char; /* The user's erase and line-kill chars */
|
|
public int sc_width, sc_height; /* Height & width of screen */
|
|
public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
|
|
public int ul_s_width, ul_e_width; /* Printing width of underline seq */
|
|
public int so_s_width, so_e_width; /* Printing width of standout seq */
|
|
public int bl_s_width, bl_e_width; /* Printing width of blink seq */
|
|
|
|
static void cannot(char *s);
|
|
static void inc_costcount(int c);
|
|
static int cost(char *t);
|
|
static char *cheaper(char *t1, char *t2, char *doit, char *def);
|
|
|
|
/*
|
|
* These two variables are sometimes defined in,
|
|
* and needed by, the termcap library.
|
|
* It may be necessary on some systems to declare them extern here.
|
|
*/
|
|
extern short ospeed; /* Terminal output baud rate */
|
|
extern char PC; /* Pad character */
|
|
|
|
extern int quiet; /* If VERY_QUIET, use visual bell for bell */
|
|
extern int know_dumb; /* Don't complain about a dumb terminal */
|
|
extern int back_scroll;
|
|
extern int swindow;
|
|
extern char *tgetstr(char *, char **);
|
|
extern char *tgoto(char *, int, int);
|
|
extern char *getenv(char *);
|
|
|
|
|
|
/*
|
|
* Change terminal to "raw mode", or restore to "normal" mode.
|
|
* "Raw mode" means
|
|
* 1. An outstanding read will complete on receipt of a single keystroke.
|
|
* 2. Input is not echoed.
|
|
* 3. On output, \n is mapped to \r\n.
|
|
* 4. \t is NOT expanded into spaces.
|
|
* 5. Signal-causing characters such as ctrl-C (interrupt),
|
|
* etc. are NOT disabled.
|
|
* It doesn't matter whether an input \n is mapped to \r, or vice versa.
|
|
*/
|
|
public void
|
|
raw_mode(on)
|
|
int on;
|
|
{
|
|
static int curr_on = 0;
|
|
|
|
if (on == curr_on)
|
|
return;
|
|
#if TERMIO
|
|
{
|
|
struct termio s;
|
|
static struct termio save_term;
|
|
|
|
if (on)
|
|
{
|
|
/*
|
|
* Get terminal modes.
|
|
*/
|
|
ioctl(2, TCGETA, &s);
|
|
|
|
/*
|
|
* Save modes and set certain variables dependent on modes.
|
|
*/
|
|
save_term = s;
|
|
ospeed = s.c_cflag & CBAUD;
|
|
erase_char = s.c_cc[VERASE];
|
|
kill_char = s.c_cc[VKILL];
|
|
|
|
/*
|
|
* Set the modes to the way we want them.
|
|
*/
|
|
s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
|
|
s.c_oflag |= (OPOST|ONLCR|TAB3);
|
|
s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
|
|
s.c_cc[VMIN] = 1;
|
|
s.c_cc[VTIME] = 0;
|
|
} else
|
|
{
|
|
/*
|
|
* Restore saved modes.
|
|
*/
|
|
s = save_term;
|
|
}
|
|
ioctl(2, TCSETAW, &s);
|
|
}
|
|
#else
|
|
{
|
|
struct sgttyb s;
|
|
static struct sgttyb save_term;
|
|
|
|
if (on)
|
|
{
|
|
/*
|
|
* Get terminal modes.
|
|
*/
|
|
ioctl(2, TIOCGETP, &s);
|
|
|
|
/*
|
|
* Save modes and set certain variables dependent on modes.
|
|
*/
|
|
save_term = s;
|
|
ospeed = s.sg_ospeed;
|
|
erase_char = s.sg_erase;
|
|
kill_char = s.sg_kill;
|
|
|
|
/*
|
|
* Set the modes to the way we want them.
|
|
*/
|
|
s.sg_flags |= CBREAK;
|
|
s.sg_flags &= ~(ECHO|XTABS);
|
|
} else
|
|
{
|
|
/*
|
|
* Restore saved modes.
|
|
*/
|
|
s = save_term;
|
|
}
|
|
ioctl(2, TIOCSETN, &s);
|
|
}
|
|
#endif
|
|
curr_on = on;
|
|
}
|
|
|
|
static void
|
|
cannot(s)
|
|
char *s;
|
|
{
|
|
PARG parg;
|
|
|
|
if (know_dumb)
|
|
/*
|
|
* User knows this is a dumb terminal, so don't tell him.
|
|
*/
|
|
return;
|
|
|
|
parg.p_string = s;
|
|
error("WARNING: terminal cannot %s", &parg);
|
|
}
|
|
|
|
/*
|
|
* Get size of the output screen.
|
|
*/
|
|
public void
|
|
scrsize(p_height, p_width)
|
|
int *p_height;
|
|
int *p_width;
|
|
{
|
|
register char *s;
|
|
#ifdef TIOCGWINSZ
|
|
struct winsize w;
|
|
#else
|
|
#ifdef WIOCGETD
|
|
struct uwdata w;
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef TIOCGWINSZ
|
|
if (ioctl(2, TIOCGWINSZ, &w) == 0 && w.ws_row > 0)
|
|
*p_height = w.ws_row;
|
|
else
|
|
#else
|
|
#ifdef WIOCGETD
|
|
if (ioctl(2, WIOCGETD, &w) == 0 && w.uw_height > 0)
|
|
*p_height = w.uw_height/w.uw_vs;
|
|
else
|
|
#endif
|
|
#endif
|
|
if ((s = getenv("LINES")) != NULL)
|
|
*p_height = atoi(s);
|
|
else
|
|
*p_height = tgetnum("li");
|
|
|
|
if (*p_height <= 0)
|
|
*p_height = 24;
|
|
|
|
#ifdef TIOCGWINSZ
|
|
if (ioctl(2, TIOCGWINSZ, &w) == 0 && w.ws_col > 0)
|
|
*p_width = w.ws_col;
|
|
else
|
|
#ifdef WIOCGETD
|
|
if (ioctl(2, WIOCGETD, &w) == 0 && w.uw_width > 0)
|
|
*p_width = w.uw_width/w.uw_hs;
|
|
else
|
|
#endif
|
|
#endif
|
|
if ((s = getenv("COLUMNS")) != NULL)
|
|
*p_width = atoi(s);
|
|
else
|
|
*p_width = tgetnum("co");
|
|
|
|
if (*p_width <= 0)
|
|
*p_width = 80;
|
|
}
|
|
|
|
/*
|
|
* Get terminal capabilities via termcap.
|
|
*/
|
|
public void
|
|
get_term(void)
|
|
{
|
|
char *sp;
|
|
register char *t1, *t2;
|
|
register int hard;
|
|
char *term;
|
|
static char termbuf[2048];
|
|
|
|
static char sbuf[1024];
|
|
|
|
/*
|
|
* Find out what kind of terminal this is.
|
|
*/
|
|
if ((term = getenv("TERM")) == NULL)
|
|
term = "unknown";
|
|
if (tgetent(termbuf, term) <= 0)
|
|
strcpy(termbuf, "dumb:hc:");
|
|
|
|
hard = tgetflag("hc");
|
|
|
|
/*
|
|
* Get size of the screen.
|
|
*/
|
|
scrsize(&sc_height, &sc_width);
|
|
pos_init();
|
|
if (swindow < 0)
|
|
swindow = sc_height - 1;
|
|
|
|
auto_wrap = tgetflag("am");
|
|
ignaw = tgetflag("xn");
|
|
|
|
/*
|
|
* Assumes termcap variable "sg" is the printing width of:
|
|
* the standout sequence, the end standout sequence,
|
|
* the underline sequence, the end underline sequence,
|
|
* the boldface sequence, and the end boldface sequence.
|
|
*/
|
|
if ((so_s_width = tgetnum("sg")) < 0)
|
|
so_s_width = 0;
|
|
so_e_width = so_s_width;
|
|
|
|
bo_s_width = bo_e_width = so_s_width;
|
|
ul_s_width = ul_e_width = so_s_width;
|
|
bl_s_width = bl_e_width = so_s_width;
|
|
|
|
/*
|
|
* Get various string-valued capabilities.
|
|
*/
|
|
sp = sbuf;
|
|
|
|
sc_pad = tgetstr("pc", &sp);
|
|
if (sc_pad != NULL)
|
|
PC = *sc_pad;
|
|
|
|
sc_init = tgetstr("ti", &sp);
|
|
if (sc_init == NULL)
|
|
sc_init = "";
|
|
|
|
sc_deinit= tgetstr("te", &sp);
|
|
if (sc_deinit == NULL)
|
|
sc_deinit = "";
|
|
|
|
sc_eol_clear = tgetstr("ce", &sp);
|
|
if (hard || sc_eol_clear == NULL || *sc_eol_clear == '\0')
|
|
{
|
|
cannot("clear to end of line");
|
|
sc_eol_clear = "";
|
|
}
|
|
|
|
sc_clear = tgetstr("cl", &sp);
|
|
if (hard || sc_clear == NULL || *sc_clear == '\0')
|
|
{
|
|
cannot("clear screen");
|
|
sc_clear = "\n\n";
|
|
}
|
|
|
|
sc_move = tgetstr("cm", &sp);
|
|
if (hard || sc_move == NULL || *sc_move == '\0')
|
|
{
|
|
/*
|
|
* This is not an error here, because we don't
|
|
* always need sc_move.
|
|
* We need it only if we don't have home or lower-left.
|
|
*/
|
|
sc_move = "";
|
|
}
|
|
|
|
sc_s_in = tgetstr("so", &sp);
|
|
if (hard || sc_s_in == NULL)
|
|
sc_s_in = "";
|
|
|
|
sc_s_out = tgetstr("se", &sp);
|
|
if (hard || sc_s_out == NULL)
|
|
sc_s_out = "";
|
|
|
|
sc_u_in = tgetstr("us", &sp);
|
|
if (hard || sc_u_in == NULL)
|
|
sc_u_in = sc_s_in;
|
|
|
|
sc_u_out = tgetstr("ue", &sp);
|
|
if (hard || sc_u_out == NULL)
|
|
sc_u_out = sc_s_out;
|
|
|
|
sc_b_in = tgetstr("md", &sp);
|
|
if (hard || sc_b_in == NULL)
|
|
{
|
|
sc_b_in = sc_s_in;
|
|
sc_b_out = sc_s_out;
|
|
} else
|
|
{
|
|
sc_b_out = tgetstr("me", &sp);
|
|
if (hard || sc_b_out == NULL)
|
|
sc_b_out = "";
|
|
}
|
|
|
|
sc_bl_in = tgetstr("mb", &sp);
|
|
if (hard || sc_bl_in == NULL)
|
|
{
|
|
sc_bl_in = sc_s_in;
|
|
sc_bl_out = sc_s_out;
|
|
} else
|
|
{
|
|
sc_bl_out = sc_b_out;
|
|
}
|
|
|
|
sc_visual_bell = tgetstr("vb", &sp);
|
|
if (hard || sc_visual_bell == NULL)
|
|
sc_visual_bell = "";
|
|
|
|
if (tgetflag("bs"))
|
|
sc_backspace = "\b";
|
|
else
|
|
{
|
|
sc_backspace = tgetstr("bc", &sp);
|
|
if (sc_backspace == NULL || *sc_backspace == '\0')
|
|
sc_backspace = "\b";
|
|
}
|
|
|
|
/*
|
|
* Choose between using "ho" and "cm" ("home" and "cursor move")
|
|
* to move the cursor to the upper left corner of the screen.
|
|
*/
|
|
t1 = tgetstr("ho", &sp);
|
|
if (hard || t1 == NULL)
|
|
t1 = "";
|
|
if (*sc_move == '\0')
|
|
t2 = "";
|
|
else
|
|
{
|
|
strcpy(sp, tgoto(sc_move, 0, 0));
|
|
t2 = sp;
|
|
sp += strlen(sp) + 1;
|
|
}
|
|
sc_home = cheaper(t1, t2, "home cursor", "|\b^");
|
|
|
|
/*
|
|
* Choose between using "ll" and "cm" ("lower left" and "cursor move")
|
|
* to move the cursor to the lower left corner of the screen.
|
|
*/
|
|
t1 = tgetstr("ll", &sp);
|
|
if (hard || t1 == NULL)
|
|
t1 = "";
|
|
if (*sc_move == '\0')
|
|
t2 = "";
|
|
else
|
|
{
|
|
strcpy(sp, tgoto(sc_move, 0, sc_height-1));
|
|
t2 = sp;
|
|
sp += strlen(sp) + 1;
|
|
}
|
|
sc_lower_left = cheaper(t1, t2,
|
|
"move cursor to lower left of screen", "\r");
|
|
|
|
/*
|
|
* Choose between using "al" or "sr" ("add line" or "scroll reverse")
|
|
* to add a line at the top of the screen.
|
|
*/
|
|
t1 = tgetstr("al", &sp);
|
|
if (hard || t1 == NULL)
|
|
t1 = "";
|
|
t2 = tgetstr("sr", &sp);
|
|
if (hard || t2 == NULL)
|
|
t2 = "";
|
|
sc_addline = cheaper(t1, t2, "scroll backwards", "");
|
|
if (*sc_addline == '\0')
|
|
{
|
|
/*
|
|
* Force repaint on any backward movement.
|
|
*/
|
|
back_scroll = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return the cost of displaying a termcap string.
|
|
* We use the trick of calling tputs, but as a char printing function
|
|
* we give it inc_costcount, which just increments "costcount".
|
|
* This tells us how many chars would be printed by using this string.
|
|
* {{ Couldn't we just use strlen? }}
|
|
*/
|
|
static int costcount;
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
inc_costcount(c)
|
|
int c;
|
|
{
|
|
costcount++;
|
|
}
|
|
|
|
static int
|
|
cost(t)
|
|
char *t;
|
|
{
|
|
costcount = 0;
|
|
tputs(t, sc_height, inc_costcount);
|
|
return (costcount);
|
|
}
|
|
|
|
/*
|
|
* Return the "best" of the two given termcap strings.
|
|
* The best, if both exist, is the one with the lower
|
|
* cost (see cost() function).
|
|
*/
|
|
static char *
|
|
cheaper(t1, t2, doit, def)
|
|
char *t1, *t2;
|
|
char *doit;
|
|
char *def;
|
|
{
|
|
if (*t1 == '\0' && *t2 == '\0')
|
|
{
|
|
cannot(doit);
|
|
return (def);
|
|
}
|
|
if (*t1 == '\0')
|
|
return (t2);
|
|
if (*t2 == '\0')
|
|
return (t1);
|
|
if (cost(t1) < cost(t2))
|
|
return (t1);
|
|
return (t2);
|
|
}
|
|
|
|
|
|
/*
|
|
* Below are the functions which perform all the
|
|
* terminal-specific screen manipulation.
|
|
*/
|
|
|
|
|
|
/*
|
|
* Initialize terminal
|
|
*/
|
|
public void
|
|
init(void)
|
|
{
|
|
tputs(sc_init, sc_height, putchr);
|
|
init_done = 1;
|
|
}
|
|
|
|
/*
|
|
* Deinitialize terminal
|
|
*/
|
|
public void
|
|
deinit(void)
|
|
{
|
|
if (!init_done)
|
|
return;
|
|
tputs(sc_deinit, sc_height, putchr);
|
|
init_done = 0;
|
|
}
|
|
|
|
/*
|
|
* Home cursor (move to upper left corner of screen).
|
|
*/
|
|
public void
|
|
home(void)
|
|
{
|
|
tputs(sc_home, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Add a blank line (called with cursor at home).
|
|
* Should scroll the display down.
|
|
*/
|
|
public void
|
|
add_line(void)
|
|
{
|
|
tputs(sc_addline, sc_height, putchr);
|
|
}
|
|
|
|
/*
|
|
* Move cursor to lower left corner of screen.
|
|
*/
|
|
public void
|
|
lower_left(void)
|
|
{
|
|
tputs(sc_lower_left, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Ring the terminal bell.
|
|
*/
|
|
public void
|
|
bell(void)
|
|
{
|
|
if (quiet == VERY_QUIET)
|
|
vbell();
|
|
else
|
|
putchr('\7');
|
|
}
|
|
|
|
/*
|
|
* Output the "visual bell", if there is one.
|
|
*/
|
|
public void
|
|
vbell(void)
|
|
{
|
|
if (*sc_visual_bell == '\0')
|
|
return;
|
|
tputs(sc_visual_bell, sc_height, putchr);
|
|
}
|
|
|
|
/*
|
|
* Clear the screen.
|
|
*/
|
|
public void
|
|
clear(void)
|
|
{
|
|
tputs(sc_clear, sc_height, putchr);
|
|
}
|
|
|
|
/*
|
|
* Clear from the cursor to the end of the cursor's line.
|
|
* {{ This must not move the cursor. }}
|
|
*/
|
|
public void
|
|
clear_eol(void)
|
|
{
|
|
tputs(sc_eol_clear, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Begin "standout" (bold, underline, or whatever).
|
|
*/
|
|
public void
|
|
so_enter(void)
|
|
{
|
|
tputs(sc_s_in, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* End "standout".
|
|
*/
|
|
public void
|
|
so_exit(void)
|
|
{
|
|
tputs(sc_s_out, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Begin "underline" (hopefully real underlining,
|
|
* otherwise whatever the terminal provides).
|
|
*/
|
|
public void
|
|
ul_enter(void)
|
|
{
|
|
tputs(sc_u_in, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* End "underline".
|
|
*/
|
|
public void
|
|
ul_exit(void)
|
|
{
|
|
tputs(sc_u_out, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Begin "bold"
|
|
*/
|
|
public void
|
|
bo_enter(void)
|
|
{
|
|
tputs(sc_b_in, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* End "bold".
|
|
*/
|
|
public void
|
|
bo_exit(void)
|
|
{
|
|
tputs(sc_b_out, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Begin "blink"
|
|
*/
|
|
public void
|
|
bl_enter(void)
|
|
{
|
|
tputs(sc_bl_in, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* End "blink".
|
|
*/
|
|
public void
|
|
bl_exit(void)
|
|
{
|
|
tputs(sc_bl_out, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Erase the character to the left of the cursor
|
|
* and move the cursor left.
|
|
*/
|
|
public void
|
|
backspace(void)
|
|
{
|
|
/*
|
|
* Try to erase the previous character by overstriking with a space.
|
|
*/
|
|
tputs(sc_backspace, 1, putchr);
|
|
putchr(' ');
|
|
tputs(sc_backspace, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Output a plain backspace, without erasing the previous char.
|
|
*/
|
|
public void
|
|
putbs(void)
|
|
{
|
|
tputs(sc_backspace, 1, putchr);
|
|
}
|