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toaruos/userspace/gui/terminal/terminal.c

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/* vim: tabstop=4 shiftwidth=4 noexpandtab
* This file is part of ToaruOS and is released under the terms
* of the NCSA / University of Illinois License - see LICENSE.md
* Copyright (C) 2013-2014 Kevin Lange
*
* Terminal Emulator
*
* Graphical terminal emulator.
*
* Provides a number of features:
* - Windowed and full screen modes
* - Antialiased fonts
* - Built-in fallback bitmap font
* - ANSI escape support
* - 256 colors
*/
#include <stdio.h>
#include <stdint.h>
#include <syscall.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <getopt.h>
#include <errno.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_CACHE_H
#include <wchar.h>
#include "lib/utf8decode.h"
#include "lib/graphics.h"
#include "lib/yutani.h"
#include "lib/decorations.h"
#include "lib/kbd.h"
#include "lib/spinlock.h"
#include "terminal-palette.h"
#include "terminal-font.h"
#include "gui/terminal/lib/termemu.h"
#define USE_BELL 0
/* master and slave pty descriptors */
static int fd_master, fd_slave;
static FILE * terminal;
int scale_fonts = 0; /* Whether fonts should be scaled */
float font_scaling = 1.0; /* How much they should be scaled by */
uint16_t term_width = 0; /* Width of the terminal (in cells) */
uint16_t term_height = 0; /* Height of the terminal (in cells) */
uint16_t font_size = 13; /* Font size according to Freetype */
uint16_t char_width = 8; /* Width of a cell in pixels */
uint16_t char_height = 12; /* Height of a cell in pixels */
uint16_t char_offset = 0; /* Offset of the font within the cell */
int csr_x = 0; /* Cursor X */
int csr_y = 0; /* Cursor Y */
term_cell_t * term_buffer = NULL; /* The terminal cell buffer */
uint32_t current_fg = 7; /* Current foreground color */
uint32_t current_bg = 0; /* Current background color */
uint8_t cursor_on = 1; /* Whether or not the cursor should be rendered */
uint8_t _fullscreen = 0; /* Whether or not we are running in fullscreen mode (GUI only) */
uint8_t _no_frame = 0; /* Whether to disable decorations or not */
uint8_t _login_shell = 0; /* Whether we're going to display a login shell or not */
uint8_t _use_freetype = 0; /* Whether we should use freetype or not XXX seriously, how about some flags */
uint8_t _force_kernel = 0;
uint8_t _hold_out = 0; /* state indicator on last cell ignore \n */
uint8_t _free_size = 1; /* Disable rounding when resized */
int last_mouse_x = -1;
int last_mouse_y = -1;
int button_state = 0;
uint64_t mouse_ticks = 0;
yutani_window_t * window = NULL; /* GUI window */
yutani_t * yctx = NULL;
term_state_t * ansi_state = NULL;
int32_t l_x = INT32_MAX;
int32_t l_y = INT32_MAX;
int32_t r_x = -1;
int32_t r_y = -1;
void reinit(); /* Defined way further down */
void term_redraw_cursor();
/* Some GUI-only options */
uint32_t window_width = 640;
uint32_t window_height = 408;
#define TERMINAL_TITLE_SIZE 512
char terminal_title[TERMINAL_TITLE_SIZE];
size_t terminal_title_length = 0;
gfx_context_t * ctx;
static void render_decors();
void term_clear();
void flush_unused_images(void);
void dump_buffer();
/* Trigger to exit the terminal when the child process dies or
* we otherwise receive an exit signal */
volatile int exit_application = 0;
static uint64_t get_ticks(void) {
struct timeval now;
gettimeofday(&now, NULL);
return (uint64_t)now.tv_sec * 1000000LL + (uint64_t)now.tv_usec;
}
static void display_flip(void) {
if (l_x != INT32_MAX && l_y != INT32_MAX) {
yutani_flip_region(yctx, window, l_x, l_y, r_x - l_x, r_y - l_y);
l_x = INT32_MAX;
l_y = INT32_MAX;
r_x = -1;
r_y = -1;
}
}
static void set_term_font_size(float s) {
scale_fonts = 1;
font_scaling = s;
reinit(1);
}
/* Returns the lower of two shorts */
int32_t min(int32_t a, int32_t b) {
return (a < b) ? a : b;
}
/* Returns the higher of two shorts */
int32_t max(int32_t a, int32_t b) {
return (a > b) ? a : b;
}
void set_title(char * c) {
int len = min(TERMINAL_TITLE_SIZE, strlen(c)+1);
memcpy(terminal_title, c, len);
terminal_title[len-1] = '\0';
terminal_title_length = len - 1;
render_decors();
}
/* Stuffs a string into the stdin of the terminal's child process
* Useful for things like the ANSI DSR command. */
void input_buffer_stuff(char * str) {
size_t s = strlen(str) + 1;
write(fd_master, str, s);
}
static void render_decors() {
/* XXX Make the decorations library support Yutani windows */
if (_fullscreen) return;
if (!_no_frame) {
render_decorations(window, ctx, terminal_title_length ? terminal_title : "Terminal");
}
yutani_window_advertise_icon(yctx, window, terminal_title_length ? terminal_title : "Terminal", "utilities-terminal");
l_x = 0; l_y = 0;
r_x = window->width;
r_y = window->height;
display_flip();
}
static inline void term_set_point(uint16_t x, uint16_t y, uint32_t color ) {
if (_fullscreen) {
color = alpha_blend_rgba(premultiply(rgba(0,0,0,0xFF)), color);
}
if (!_no_frame) {
GFX(ctx, (x+decor_left_width),(y+decor_top_height)) = color;
} else {
GFX(ctx, x,y) = color;
}
}
/* FreeType text rendering */
FT_Library library;
FT_Face face;
FT_Face face_bold;
FT_Face face_italic;
FT_Face face_bold_italic;
FT_Face face_extra;
FT_Face face_symbol;
FT_Face face_variable;
FT_Face * fallbacks[] = {&face_variable, &face_symbol, &face_extra, &face_symbol, NULL};
void drawChar(FT_Bitmap * bitmap, int x, int y, uint32_t fg, uint32_t bg) {
int i, j, p, q;
int x_max = x + bitmap->width;
int y_max = y + bitmap->rows;
for (j = y, q = 0; j < y_max; j++, q++) {
for ( i = x, p = 0; i < x_max; i++, p++) {
uint32_t a = _ALP(fg);
a = (a * bitmap->buffer[q * bitmap->width + p]) / 255;
uint32_t tmp = rgba(_RED(fg),_GRE(fg),_BLU(fg),a);
term_set_point(i,j, alpha_blend_rgba(premultiply(bg), premultiply(tmp)));
}
}
}
void draw_semi_block(int c, int x, int y, uint32_t fg, uint32_t bg) {
int height;
bg = premultiply(bg);
fg = premultiply(fg);
if (c == 0x2580) {
uint32_t t = bg;
bg = fg;
fg = t;
c = 0x2584;
for (uint8_t i = 0; i < char_height; ++i) {
for (uint8_t j = 0; j < char_width; ++j) {
term_set_point(x+j,y+i,bg);
}
}
}
c -= 0x2580;
height = char_height - ((c * char_height) / 8);
for (uint8_t i = height; i < char_height; ++i) {
for (uint8_t j = 0; j < char_width; ++j) {
term_set_point(x+j, y+i,fg);
}
}
}
void focus_callback(yutani_window_t * yutani_window) {
render_decors();
term_redraw_cursor();
}
void
term_write_char(
uint32_t val,
uint16_t x,
uint16_t y,
uint32_t fg,
uint32_t bg,
uint8_t flags
) {
uint32_t _fg, _bg;
if (fg < PALETTE_COLORS) {
_fg = term_colors[fg];
_fg |= 0xFF << 24;
} else {
_fg = fg;
}
if (bg < PALETTE_COLORS) {
_bg = term_colors[bg];
if (flags & ANSI_SPECBG) {
_bg |= 0xFF << 24;
} else {
_bg |= TERM_DEFAULT_OPAC << 24;
}
} else {
_bg = bg;
}
if (_use_freetype) {
if (val == 0xFFFF) { return; } /* Unicode, do not redraw here */
for (uint8_t i = 0; i < char_height; ++i) {
for (uint8_t j = 0; j < char_width; ++j) {
term_set_point(x+j,y+i,premultiply(_bg));
}
}
if (flags & ANSI_WIDE) {
for (uint8_t i = 0; i < char_height; ++i) {
for (uint8_t j = char_width; j < 2 * char_width; ++j) {
term_set_point(x+j,y+i,premultiply(_bg));
}
}
}
if (val < 32 || val == ' ') {
goto _extra_stuff;
}
if (val >= 0x2580 && val <= 0x2588) {
draw_semi_block(val, x, y, _fg, _bg);
goto _extra_stuff;
}
int pen_x = x;
int pen_y = y + char_offset;
int error;
FT_Face * _font = NULL;
FT_GlyphSlot slot;
FT_UInt glyph_index;
if (flags & ANSI_ALTFONT) {
_font = &face_extra;
} else if (flags & ANSI_BOLD && flags & ANSI_ITALIC) {
_font = &face_bold_italic;
} else if (flags & ANSI_ITALIC) {
_font = &face_italic;
} else if (flags & ANSI_BOLD) {
_font = &face_bold;
} else {
_font = &face;
}
glyph_index = FT_Get_Char_Index(*_font, val);
if (!glyph_index) {
int i = 0;
while (!glyph_index && fallbacks[i]) {
_font = fallbacks[i];
glyph_index = FT_Get_Char_Index(*_font, val);
i++;
}
}
error = FT_Load_Glyph(*_font, glyph_index, FT_LOAD_DEFAULT);
if (error) {
fprintf(terminal, "Error loading glyph: %d\n", val);
fprintf(stderr, "Error loading glyph: %d\n", val);
};
slot = (*_font)->glyph;
if (slot->format == FT_GLYPH_FORMAT_OUTLINE) {
error = FT_Render_Glyph((*_font)->glyph, FT_RENDER_MODE_NORMAL);
if (error) {
fprintf(stderr, "Error rendering glyph: %d\n", val);
goto _extra_stuff;
}
}
drawChar(&slot->bitmap, pen_x + slot->bitmap_left, pen_y - slot->bitmap_top, _fg, _bg);
} else {
if (val > 128) {
val = 4;
}
uint8_t * c = number_font[val];
for (uint8_t i = 0; i < char_height; ++i) {
for (uint8_t j = 0; j < char_width; ++j) {
if (c[i] & (1 << (8-j))) {
term_set_point(x+j,y+i,_fg);
} else {
term_set_point(x+j,y+i,_bg);
}
}
}
}
_extra_stuff:
if (flags & ANSI_UNDERLINE) {
for (uint8_t i = 0; i < char_width; ++i) {
term_set_point(x + i, y + char_offset + 2, _fg);
}
}
if (flags & ANSI_CROSS) {
for (uint8_t i = 0; i < char_width; ++i) {
term_set_point(x + i, y + char_offset - 5, _fg);
}
}
if (flags & ANSI_BORDER) {
for (uint8_t i = 0; i < char_height; ++i) {
term_set_point(x , y + i, _fg);
term_set_point(x + (char_width - 1), y + i, _fg);
}
for (uint8_t j = 0; j < char_width; ++j) {
term_set_point(x + j, y, _fg);
term_set_point(x + j, y + (char_height - 1), _fg);
}
}
if (!_no_frame) {
l_x = min(l_x, decor_left_width + x);
l_y = min(l_y, decor_top_height + y);
if (flags & ANSI_WIDE) {
r_x = max(r_x, decor_left_width + x + char_width * 2);
r_y = max(r_y, decor_top_height + y + char_height * 2);
} else {
r_x = max(r_x, decor_left_width + x + char_width);
r_y = max(r_y, decor_top_height + y + char_height);
}
} else {
l_x = min(l_x, x);
l_y = min(l_y, y);
if (flags & ANSI_WIDE) {
r_x = max(r_x, x + char_width * 2);
r_y = max(r_y, y + char_height * 2);
} else {
r_x = max(r_x, x + char_width);
r_y = max(r_y, y + char_height);
}
}
}
static void cell_set(uint16_t x, uint16_t y, uint32_t c, uint32_t fg, uint32_t bg, uint32_t flags) {
if (x >= term_width || y >= term_height) return;
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
cell->c = c;
cell->fg = fg;
cell->bg = bg;
cell->flags = flags;
}
static void redraw_cell_image(uint16_t x, uint16_t y, term_cell_t * cell) {
if (x >= term_width || y >= term_height) return;
uint32_t * data = (uint32_t *)cell->fg;
for (uint32_t yy = 0; yy < char_height; ++yy) {
for (uint32_t xx = 0; xx < char_width; ++xx) {
term_set_point(x * char_width + xx, y * char_height + yy, *data);
data++;
}
}
if (!_no_frame) {
l_x = min(l_x, decor_left_width + x * char_width);
l_y = min(l_y, decor_top_height + y * char_height);
r_x = max(r_x, decor_left_width + x * char_width + char_width);
r_y = max(r_y, decor_top_height + y * char_height + char_height);
} else {
l_x = min(l_x, x * char_width);
l_y = min(l_y, y * char_height);
r_x = max(r_x, x * char_width + char_width);
r_y = max(r_y, y * char_height + char_height);
}
}
static void cell_redraw(uint16_t x, uint16_t y) {
if (x >= term_width || y >= term_height) return;
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
if (cell->flags & ANSI_EXT_IMG) { redraw_cell_image(x,y,cell); return; }
if (((uint32_t *)cell)[0] == 0x00000000) {
term_write_char(' ', x * char_width, y * char_height, TERM_DEFAULT_FG, TERM_DEFAULT_BG, TERM_DEFAULT_FLAGS);
} else {
term_write_char(cell->c, x * char_width, y * char_height, cell->fg, cell->bg, cell->flags);
}
}
static void cell_redraw_inverted(uint16_t x, uint16_t y) {
if (x >= term_width || y >= term_height) return;
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
if (cell->flags & ANSI_EXT_IMG) { redraw_cell_image(x,y,cell); return; }
if (((uint32_t *)cell)[0] == 0x00000000) {
term_write_char(' ', x * char_width, y * char_height, TERM_DEFAULT_BG, TERM_DEFAULT_FG, TERM_DEFAULT_FLAGS | ANSI_SPECBG);
} else {
term_write_char(cell->c, x * char_width, y * char_height, cell->bg, cell->fg, cell->flags | ANSI_SPECBG);
}
}
static void cell_redraw_box(uint16_t x, uint16_t y) {
if (x >= term_width || y >= term_height) return;
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
if (cell->flags & ANSI_EXT_IMG) { redraw_cell_image(x,y,cell); return; }
if (((uint32_t *)cell)[0] == 0x00000000) {
term_write_char(' ', x * char_width, y * char_height, TERM_DEFAULT_FG, TERM_DEFAULT_BG, TERM_DEFAULT_FLAGS | ANSI_BORDER);
} else {
term_write_char(cell->c, x * char_width, y * char_height, cell->fg, cell->bg, cell->flags | ANSI_BORDER);
}
}
void render_cursor() {
if (!window->focused) {
cell_redraw_box(csr_x, csr_y);
} else {
cell_redraw_inverted(csr_x, csr_y);
}
}
void draw_cursor() {
if (!cursor_on) return;
mouse_ticks = get_ticks();
render_cursor();
}
void term_redraw_all() {
for (int i = 0; i < term_height; i++) {
for (int x = 0; x < term_width; ++x) {
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (i * term_width + x) * sizeof(term_cell_t));
if (cell->flags & ANSI_EXT_IMG) { redraw_cell_image(x,i,cell); continue; }
if (((uint32_t *)cell)[0] == 0x00000000) {
term_write_char(' ', x * char_width, i * char_height, TERM_DEFAULT_FG, TERM_DEFAULT_BG, TERM_DEFAULT_FLAGS);
} else {
term_write_char(cell->c, x * char_width, i * char_height, cell->fg, cell->bg, cell->flags);
}
}
}
}
void term_scroll(int how_much) {
if (how_much >= term_height || -how_much >= term_height) {
term_clear();
return;
}
if (how_much == 0) {
return;
}
cell_redraw(csr_x, csr_y);
if (how_much > 0) {
/* Shift terminal cells one row up */
memmove(term_buffer, (void *)((uintptr_t)term_buffer + sizeof(term_cell_t) * term_width), sizeof(term_cell_t) * term_width * (term_height - how_much));
/* Reset the "new" row to clean cells */
memset((void *)((uintptr_t)term_buffer + sizeof(term_cell_t) * term_width * (term_height - how_much)), 0x0, sizeof(term_cell_t) * term_width * how_much);
/* In graphical modes, we will shift the graphics buffer up as necessary */
uintptr_t dst, src;
size_t siz = char_height * (term_height - how_much) * GFX_W(ctx) * GFX_B(ctx);
if (!_no_frame) {
/* Must include decorations */
dst = (uintptr_t)ctx->backbuffer + (GFX_W(ctx) * decor_top_height) * GFX_B(ctx);
src = (uintptr_t)ctx->backbuffer + (GFX_W(ctx) * (decor_top_height + char_height * how_much)) * GFX_B(ctx);
} else {
/* Can skip decorations */
dst = (uintptr_t)ctx->backbuffer;
src = (uintptr_t)ctx->backbuffer + (GFX_W(ctx) * char_height * how_much) * GFX_B(ctx);
}
/* Perform the shift */
memmove((void *)dst, (void *)src, siz);
/* And redraw the new rows */
for (int i = 0; i < how_much; ++i) {
for (uint16_t x = 0; x < term_width; ++x) {
cell_set(x,term_height - how_much,' ', current_fg, current_bg, ansi_state->flags);
cell_redraw(x, term_height - how_much);
}
}
} else {
how_much = -how_much;
/* Shift terminal cells one row up */
memmove((void *)((uintptr_t)term_buffer + sizeof(term_cell_t) * term_width), term_buffer, sizeof(term_cell_t) * term_width * (term_height - how_much));
/* Reset the "new" row to clean cells */
memset(term_buffer, 0x0, sizeof(term_cell_t) * term_width * how_much);
uintptr_t dst, src;
size_t siz = char_height * (term_height - how_much) * GFX_W(ctx) * GFX_B(ctx);
if (!_no_frame) {
src = (uintptr_t)ctx->backbuffer + (GFX_W(ctx) * decor_top_height) * GFX_B(ctx);
dst = (uintptr_t)ctx->backbuffer + (GFX_W(ctx) * (decor_top_height + char_height * how_much)) * GFX_B(ctx);
} else {
src = (uintptr_t)ctx->backbuffer;
dst = (uintptr_t)ctx->backbuffer + (GFX_W(ctx) * char_height * how_much) * GFX_B(ctx);
}
/* Perform the shift */
memmove((void *)dst, (void *)src, siz);
/* And redraw the new rows */
for (int i = 0; i < how_much; ++i) {
for (uint16_t x = 0; x < term_width; ++x) {
cell_redraw(x, i);
}
}
}
flush_unused_images();
yutani_flip(yctx, window);
}
int is_wide(uint32_t codepoint) {
if (codepoint < 256) return 0;
return wcwidth(codepoint) == 2;
}
struct scrollback_row {
unsigned short width;
term_cell_t cells[];
};
#define MAX_SCROLLBACK 10240
list_t * scrollback_list = NULL;
uint32_t scrollback_offset = 0;
void save_scrollback() {
/* Save the current top row for scrollback */
if (!scrollback_list) {
scrollback_list = list_create();
}
if (scrollback_list->length == MAX_SCROLLBACK) {
free(list_dequeue(scrollback_list));
}
struct scrollback_row * row = malloc(sizeof(struct scrollback_row) + sizeof(term_cell_t) * term_width + 20);
row->width = term_width;
for (int i = 0; i < term_width; ++i) {
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (i) * sizeof(term_cell_t));
memcpy(&row->cells[i], cell, sizeof(term_cell_t));
}
list_insert(scrollback_list, row);
}
void redraw_scrollback() {
if (!scrollback_offset) {
term_redraw_all();
display_flip();
return;
}
if (scrollback_offset < term_height) {
for (int i = scrollback_offset; i < term_height; i++) {
int y = i - scrollback_offset;
for (int x = 0; x < term_width; ++x) {
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
if (cell->flags & ANSI_EXT_IMG) { redraw_cell_image(x,i,cell); continue; }
if (((uint32_t *)cell)[0] == 0x00000000) {
term_write_char(' ', x * char_width, i * char_height, TERM_DEFAULT_FG, TERM_DEFAULT_BG, TERM_DEFAULT_FLAGS);
} else {
term_write_char(cell->c, x * char_width, i * char_height, cell->fg, cell->bg, cell->flags);
}
}
}
node_t * node = scrollback_list->tail;
for (int i = 0; i < scrollback_offset; ++i) {
struct scrollback_row * row = (struct scrollback_row *)node->value;
int y = scrollback_offset - 1 - i;
int width = row->width;
if (width > term_width) {
width = term_width;
} else {
for (int x = row->width; x < term_width; ++x) {
term_write_char(' ', x * char_width, y * char_height, TERM_DEFAULT_FG, TERM_DEFAULT_BG, TERM_DEFAULT_FLAGS);
}
}
for (int x = 0; x < width; ++x) {
term_cell_t * cell = &row->cells[x];
if (((uint32_t *)cell)[0] == 0x00000000) {
term_write_char(' ', x * char_width, y * char_height, TERM_DEFAULT_FG, TERM_DEFAULT_BG, TERM_DEFAULT_FLAGS);
} else {
term_write_char(cell->c, x * char_width, y * char_height, cell->fg, cell->bg, cell->flags);
}
}
node = node->prev;
}
} else {
node_t * node = scrollback_list->tail;
for (int i = 0; i < scrollback_offset - term_height; ++i) {
node = node->prev;
}
for (int i = scrollback_offset - term_height; i < scrollback_offset; ++i) {
struct scrollback_row * row = (struct scrollback_row *)node->value;
int y = scrollback_offset - 1 - i;
int width = row->width;
if (width > term_width) {
width = term_width;
} else {
for (int x = row->width; x < term_width; ++x) {
term_write_char(' ', x * char_width, y * char_height, TERM_DEFAULT_FG, TERM_DEFAULT_BG, TERM_DEFAULT_FLAGS);
}
}
for (int x = 0; x < width; ++x) {
term_cell_t * cell = &row->cells[x];
if (((uint32_t *)cell)[0] == 0x00000000) {
term_write_char(' ', x * char_width, y * char_height, TERM_DEFAULT_FG, TERM_DEFAULT_BG, TERM_DEFAULT_FLAGS);
} else {
term_write_char(cell->c, x * char_width, y * char_height, cell->fg, cell->bg, cell->flags);
}
}
node = node->prev;
}
}
display_flip();
}
void term_write(char c) {
static uint32_t unicode_state = 0;
static uint32_t codepoint = 0;
cell_redraw(csr_x, csr_y);
if (!decode(&unicode_state, &codepoint, (uint8_t)c)) {
uint32_t o = codepoint;
codepoint = 0;
if (c == '\r') {
csr_x = 0;
return;
}
if (csr_x < 0) csr_x = 0;
if (csr_y < 0) csr_y = 0;
if (csr_x == term_width) {
csr_x = 0;
++csr_y;
}
if (csr_y == term_height) {
save_scrollback();
term_scroll(1);
csr_y = term_height - 1;
}
if (c == '\n') {
if (csr_x == 0 && _hold_out) {
_hold_out = 0;
return;
}
++csr_y;
if (csr_y == term_height) {
save_scrollback();
term_scroll(1);
csr_y = term_height - 1;
}
draw_cursor();
} else if (c == '\007') {
/* bell */
#if USE_BELL
for (int i = 0; i < term_height; ++i) {
for (int j = 0; j < term_width; ++j) {
cell_redraw_inverted(j, i);
}
}
syscall_nanosleep(0,10);
term_redraw_all();
#endif
} else if (c == '\b') {
if (csr_x > 0) {
--csr_x;
}
cell_redraw(csr_x, csr_y);
draw_cursor();
} else if (c == '\t') {
csr_x += (8 - csr_x % 8);
draw_cursor();
} else {
int wide = is_wide(o);
uint8_t flags = ansi_state->flags;
if (wide && csr_x == term_width - 1) {
csr_x = 0;
++csr_y;
}
if (wide) {
flags = flags | ANSI_WIDE;
}
cell_set(csr_x,csr_y, o, current_fg, current_bg, flags);
cell_redraw(csr_x,csr_y);
csr_x++;
if (wide && csr_x != term_width) {
cell_set(csr_x, csr_y, 0xFFFF, current_fg, current_bg, ansi_state->flags);
cell_redraw(csr_x,csr_y);
cell_redraw(csr_x-1,csr_y);
csr_x++;
}
}
} else if (unicode_state == UTF8_REJECT) {
unicode_state = 0;
codepoint = 0;
}
draw_cursor();
}
void term_set_csr(int x, int y) {
cell_redraw(csr_x,csr_y);
csr_x = x;
csr_y = y;
draw_cursor();
}
int term_get_csr_x(void) {
return csr_x;
}
int term_get_csr_y(void) {
return csr_y;
}
static list_t * images_list = NULL;
void term_set_cell_contents(int x, int y, char * data) {
if (!images_list) {
images_list = list_create();
}
char * cell_data = malloc(char_width * char_height * sizeof(uint32_t));
memcpy(cell_data, data, char_width * char_height * sizeof(uint32_t));
list_insert(images_list, cell_data);
cell_set(x, y, ' ', (uint32_t)cell_data, 0, ANSI_EXT_IMG);
return;
}
void flush_unused_images(void) {
if (!images_list) return;
list_t * tmp = list_create();
for (int y = 0; y < term_height; ++y) {
for (int x = 0; x < term_width; ++x) {
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
if (cell->flags & ANSI_EXT_IMG) {
list_insert(tmp, (void *)cell->fg);
}
}
}
foreach(node, images_list) {
if (!list_find(tmp, node->value)) {
free(node->value);
}
}
list_free(images_list);
images_list = tmp;
}
int term_get_cell_width(void) {
return char_width;
}
int term_get_cell_height(void) {
return char_height;
}
void term_set_csr_show(int on) {
cursor_on = on;
}
void term_set_colors(uint32_t fg, uint32_t bg) {
current_fg = fg;
current_bg = bg;
}
void term_redraw_cursor() {
if (term_buffer) {
draw_cursor();
}
}
void flip_cursor() {
static uint8_t cursor_flipped = 0;
if (scrollback_offset != 0) {
return; /* Don't flip cursor while drawing scrollback */
}
if (window->focused && cursor_flipped) {
cell_redraw(csr_x, csr_y);
} else {
render_cursor();
}
display_flip();
cursor_flipped = 1 - cursor_flipped;
}
void term_set_cell(int x, int y, uint32_t c) {
cell_set(x, y, c, current_fg, current_bg, ansi_state->flags);
cell_redraw(x, y);
}
void term_redraw_cell(int x, int y) {
if (x < 0 || y < 0 || x >= term_width || y >= term_height) return;
cell_redraw(x,y);
}
void term_clear(int i) {
if (i == 2) {
/* Oh dear */
csr_x = 0;
csr_y = 0;
memset((void *)term_buffer, 0x00, term_width * term_height * sizeof(term_cell_t));
if (!_no_frame) {
render_decors();
}
term_redraw_all();
} else if (i == 0) {
for (int x = csr_x; x < term_width; ++x) {
term_set_cell(x, csr_y, ' ');
}
for (int y = csr_y + 1; y < term_height; ++y) {
for (int x = 0; x < term_width; ++x) {
term_set_cell(x, y, ' ');
}
}
} else if (i == 1) {
for (int y = 0; y < csr_y; ++y) {
for (int x = 0; x < term_width; ++x) {
term_set_cell(x, y, ' ');
}
}
for (int x = 0; x < csr_x; ++x) {
term_set_cell(x, csr_y, ' ');
}
}
flush_unused_images();
}
char * loadMemFont(char * name, char * ident, size_t * size) {
size_t s = 0;
int error;
char tmp[100];
snprintf(tmp, 100, "sys.%s.fonts.%s", yctx->server_ident, ident);
char * font = (char *)syscall_shm_obtain(tmp, &s);
*size = s;
return font;
}
#define INPUT_SIZE 1024
char input_buffer[INPUT_SIZE];
int input_collected = 0;
void clear_input() {
memset(input_buffer, 0x0, INPUT_SIZE);
input_collected = 0;
}
uint32_t child_pid = 0;
void handle_input(char c) {
write(fd_master, &c, 1);
display_flip();
}
void handle_input_s(char * c) {
write(fd_master, c, strlen(c));
display_flip();
}
void scroll_up(int amount) {
int i = 0;
while (i < amount && scrollback_list && scrollback_offset < scrollback_list->length) {
scrollback_offset ++;
i++;
}
redraw_scrollback();
}
void scroll_down(int amount) {
int i = 0;
while (i < amount && scrollback_list && scrollback_offset != 0) {
scrollback_offset -= 1;
i++;
}
redraw_scrollback();
}
void key_event(int ret, key_event_t * event) {
if (ret) {
if (event->modifiers & KEY_MOD_LEFT_ALT || event->modifiers & KEY_MOD_RIGHT_ALT) {
handle_input('\033');
}
if ((event->modifiers & KEY_MOD_LEFT_SHIFT || event->modifiers & KEY_MOD_RIGHT_SHIFT) &&
event->key == '\t') {
handle_input_s("\033[Z");
return;
}
handle_input(event->key);
} else {
if (event->action == KEY_ACTION_UP) return;
switch (event->keycode) {
case KEY_F1:
handle_input_s("\033OP");
break;
case KEY_F2:
handle_input_s("\033OQ");
break;
case KEY_F3:
handle_input_s("\033OR");
break;
case KEY_F4:
handle_input_s("\033OS");
break;
case KEY_F5:
handle_input_s("\033[15~");
break;
case KEY_F6:
handle_input_s("\033[17~");
break;
case KEY_F7:
handle_input_s("\033[18~");
break;
case KEY_F8:
handle_input_s("\033[19~");
break;
case KEY_F9:
handle_input_s("\033[20~");
break;
case KEY_F10:
handle_input_s("\033[21~");
break;
case KEY_F11:
handle_input_s("\033[23~");
break;
case KEY_F12:
/* Toggle decorations */
if (!_fullscreen) {
_no_frame = !_no_frame;
window_width = window->width - decor_width() * (!_no_frame);
window_height = window->height - decor_height() * (!_no_frame);
reinit(1);
}
break;
case KEY_ARROW_UP:
if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_CTRL) {
handle_input_s("\033[6A");
} else if (event->modifiers & KEY_MOD_LEFT_CTRL) {
handle_input_s("\033[5A");
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_ALT) {
handle_input_s("\033[4A");
} else if (event->modifiers & KEY_MOD_LEFT_ALT) {
handle_input_s("\033[3A");
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
handle_input_s("\033[2A");
} else {
handle_input_s("\033[A");
}
break;
case KEY_ARROW_DOWN:
if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_CTRL) {
handle_input_s("\033[6B");
} else if (event->modifiers & KEY_MOD_LEFT_CTRL) {
handle_input_s("\033[5B");
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_ALT) {
handle_input_s("\033[4B");
} else if (event->modifiers & KEY_MOD_LEFT_ALT) {
handle_input_s("\033[3B");
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
handle_input_s("\033[2B");
} else {
handle_input_s("\033[B");
}
break;
case KEY_ARROW_RIGHT:
if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_CTRL) {
handle_input_s("\033[6C");
} else if (event->modifiers & KEY_MOD_LEFT_CTRL) {
handle_input_s("\033[5C");
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_ALT) {
handle_input_s("\033[4C");
} else if (event->modifiers & KEY_MOD_LEFT_ALT) {
handle_input_s("\033[3C");
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
handle_input_s("\033[2C");
} else {
handle_input_s("\033[C");
}
break;
case KEY_ARROW_LEFT:
if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_CTRL) {
handle_input_s("\033[6D");
} else if (event->modifiers & KEY_MOD_LEFT_CTRL) {
handle_input_s("\033[5D");
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_ALT) {
handle_input_s("\033[4D");
} else if (event->modifiers & KEY_MOD_LEFT_ALT) {
handle_input_s("\033[3D");
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
handle_input_s("\033[2D");
} else {
handle_input_s("\033[D");
}
break;
case KEY_PAGE_UP:
if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
scroll_up(term_height/2);
} else {
handle_input_s("\033[5~");
}
break;
case KEY_PAGE_DOWN:
if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
scroll_down(term_height/2);
} else {
handle_input_s("\033[6~");
}
break;
case KEY_HOME:
if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
scrollback_offset = scrollback_list->length;
redraw_scrollback();
} else {
handle_input_s("\033OH");
}
break;
case KEY_END:
if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
scrollback_offset = 0;
redraw_scrollback();
} else {
handle_input_s("\033OF");
}
break;
case KEY_DEL:
handle_input_s("\033[3~");
break;
case KEY_INSERT:
handle_input_s("\033[2~");
break;
}
}
}
void check_for_exit(void) {
if (exit_application) return;
int pid = waitpid(-1, NULL, WNOHANG);
if (pid != child_pid) return;
/* Clean up */
exit_application = 1;
/* Exit */
char exit_message[] = "[Process terminated]\n";
write(fd_slave, exit_message, sizeof(exit_message));
}
void usage(char * argv[]) {
printf(
"Terminal Emulator\n"
"\n"
"usage: %s [-b] [-F] [-h]\n"
"\n"
" -F --fullscreen \033[3mRun in fullscreen (background) mode.\033[0m\n"
" -b --bitmap \033[3mUse the integrated bitmap font.\033[0m\n"
" -h --help \033[3mShow this help message.\033[0m\n"
" -s --scale \033[3mScale the font in FreeType mode by a given amount.\033[0m\n"
" -x --grid \033[3mMake resizes round to nearest match for character cell size.\033[0m\n"
" -n --no-frame \033[3mDisable decorations.\033[0m\n"
"\n"
" This terminal emulator provides basic support for VT220 escapes and\n"
" XTerm extensions, including 256 color support and font effects.\n",
argv[0]);
}
term_callbacks_t term_callbacks = {
&term_write,
term_set_colors,
term_set_csr,
term_get_csr_x,
term_get_csr_y,
term_set_cell,
term_clear,
term_scroll,
term_redraw_cursor,
input_buffer_stuff,
set_term_font_size,
set_title,
term_set_cell_contents,
term_get_cell_width,
term_get_cell_height,
term_set_csr_show,
};
void reinit(int send_sig) {
if (_use_freetype) {
/* Reset font sizes */
font_size = 13;
char_height = 17;
char_width = 8;
char_offset = 13;
if (scale_fonts) {
/* Recalculate scaling */
font_size *= font_scaling;
char_height *= font_scaling;
char_width *= font_scaling;
char_offset *= font_scaling;
}
/* Initialize the freetype font pixel sizes */
FT_Set_Pixel_Sizes(face, font_size, font_size);
FT_Set_Pixel_Sizes(face_bold, font_size, font_size);
FT_Set_Pixel_Sizes(face_italic, font_size, font_size);
FT_Set_Pixel_Sizes(face_bold_italic, font_size, font_size);
FT_Set_Pixel_Sizes(face_extra, font_size, font_size);
FT_Set_Pixel_Sizes(face_symbol, font_size, font_size);
FT_Set_Pixel_Sizes(face_variable, font_size, font_size);
}
int i = 0;
int old_width = term_width;
int old_height = term_height;
term_width = window_width / char_width;
term_height = window_height / char_height;
if (term_buffer) {
term_cell_t * new_term_buffer = malloc(sizeof(term_cell_t) * term_width * term_height);
memset(new_term_buffer, 0x0, sizeof(term_cell_t) * term_width * term_height);
int offset = 0;
if (term_height < old_height) {
offset = old_height - term_height;
}
for (int row = 0; row < min(old_height, term_height); ++row) {
for (int col = 0; col < min(old_width, term_width); ++col) {
term_cell_t * old_cell = (term_cell_t *)((uintptr_t)term_buffer + ((row + offset) * old_width + col) * sizeof(term_cell_t));
term_cell_t * new_cell = (term_cell_t *)((uintptr_t)new_term_buffer + (row * term_width + col) * sizeof(term_cell_t));
*new_cell = *old_cell;
}
}
csr_y -= offset;
free(term_buffer);
term_buffer = new_term_buffer;
} else {
term_buffer = malloc(sizeof(term_cell_t) * term_width * term_height);
memset(term_buffer, 0x0, sizeof(term_cell_t) * term_width * term_height);
}
int old_mouse_state = 0;
if (ansi_state) old_mouse_state = ansi_state->mouse_on;
ansi_state = ansi_init(ansi_state, term_width, term_height, &term_callbacks);
ansi_state->mouse_on = old_mouse_state;
draw_fill(ctx, rgba(0,0,0, TERM_DEFAULT_OPAC));
render_decors();
term_redraw_all();
struct winsize w;
w.ws_row = term_height;
w.ws_col = term_width;
w.ws_xpixel = term_width * char_width;
w.ws_ypixel = term_height * char_height;
ioctl(fd_master, TIOCSWINSZ, &w);
if (send_sig) {
kill(child_pid, SIGWINCH);
}
}
static void resize_finish(int width, int height) {
static int resize_attempts = 0;
int extra_x = 0;
int extra_y = 0;
if (!_no_frame) {
extra_x = decor_width();
extra_y = decor_height();
}
int t_window_width = width - extra_x;
int t_window_height = height - extra_y;
if (t_window_width < char_width * 20 || t_window_height < char_height * 10) {
resize_attempts++;
int n_width = extra_x + max(char_width * 20, t_window_width);
int n_height = extra_y + max(char_height * 10, t_window_height);
yutani_window_resize_offer(yctx, window, n_width, n_height);
return;
}
if (!_free_size && (t_window_width % char_width != 0 || t_window_height % char_height != 0 && resize_attempts < 3)) {
resize_attempts++;
int n_width = extra_x + t_window_width - (t_window_width % char_width);
int n_height = extra_y + t_window_height - (t_window_height % char_height);
yutani_window_resize_offer(yctx, window, n_width, n_height);
return;
}
resize_attempts = 0;
yutani_window_resize_accept(yctx, window, width, height);
window_width = window->width - extra_x;
window_height = window->height - extra_y;
reinit_graphics_yutani(ctx, window);
reinit(1);
yutani_window_resize_done(yctx, window);
yutani_flip(yctx, window);
}
void mouse_event(int button, int x, int y) {
char buf[7];
sprintf(buf, "\033[M%c%c%c", button + 32, x + 33, y + 33);
handle_input_s(buf);
}
void * handle_incoming(void) {
yutani_msg_t * m = yutani_poll(yctx);
if (m) {
switch (m->type) {
case YUTANI_MSG_KEY_EVENT:
{
struct yutani_msg_key_event * ke = (void*)m->data;
int ret = (ke->event.action == KEY_ACTION_DOWN) && (ke->event.key);
key_event(ret, &ke->event);
}
break;
case YUTANI_MSG_WINDOW_FOCUS_CHANGE:
{
struct yutani_msg_window_focus_change * wf = (void*)m->data;
yutani_window_t * win = hashmap_get(yctx->windows, (void*)wf->wid);
if (win) {
win->focused = wf->focused;
render_decors();
}
}
break;
case YUTANI_MSG_SESSION_END:
{
kill(child_pid, SIGKILL);
exit_application = 1;
}
break;
case YUTANI_MSG_RESIZE_OFFER:
{
struct yutani_msg_window_resize * wr = (void*)m->data;
resize_finish(wr->width, wr->height);
}
break;
case YUTANI_MSG_WINDOW_MOUSE_EVENT:
{
struct yutani_msg_window_mouse_event * me = (void*)m->data;
if (!_no_frame) {
if (decor_handle_event(yctx, m) == DECOR_CLOSE) {
kill(child_pid, SIGKILL);
exit_application = 1;
break;
}
}
if (me->new_x < 0 || me->new_x >= window_width || me->new_y < 0 || me->new_y >= window_height) {
break;
}
/* Map Cursor Action */
if (ansi_state->mouse_on) {
int new_x = me->new_x;
int new_y = me->new_y;
if (!_no_frame) {
new_x -= decor_left_width;
new_y -= decor_top_height;
}
/* Convert from coordinate to cell positon */
new_x /= char_width;
new_y /= char_height;
if (me->buttons & YUTANI_MOUSE_SCROLL_UP) {
mouse_event(32+32, new_x, new_y);
} else if (me->buttons & YUTANI_MOUSE_SCROLL_DOWN) {
mouse_event(32+32+1, new_x, new_y);
}
if (me->buttons != button_state) {
/* Figure out what changed */
if (me->buttons & YUTANI_MOUSE_BUTTON_LEFT && !(button_state & YUTANI_MOUSE_BUTTON_LEFT)) mouse_event(0, new_x, new_y);
if (me->buttons & YUTANI_MOUSE_BUTTON_MIDDLE && !(button_state & YUTANI_MOUSE_BUTTON_MIDDLE)) mouse_event(1, new_x, new_y);
if (me->buttons & YUTANI_MOUSE_BUTTON_RIGHT && !(button_state & YUTANI_MOUSE_BUTTON_RIGHT)) mouse_event(2, new_x, new_y);
if (!(me->buttons & YUTANI_MOUSE_BUTTON_LEFT) && button_state & YUTANI_MOUSE_BUTTON_LEFT) mouse_event(3, new_x, new_y);
if (!(me->buttons & YUTANI_MOUSE_BUTTON_MIDDLE) && button_state & YUTANI_MOUSE_BUTTON_MIDDLE) mouse_event(3, new_x, new_y);
if (!(me->buttons & YUTANI_MOUSE_BUTTON_RIGHT) && button_state & YUTANI_MOUSE_BUTTON_RIGHT) mouse_event(3, new_x, new_y);
last_mouse_x = new_x;
last_mouse_y = new_y;
button_state = me->buttons;
} else if (ansi_state->mouse_on == 2) {
/* Report motion for pressed buttons */
if (last_mouse_x == new_x && last_mouse_y == new_y) break;
if (button_state & YUTANI_MOUSE_BUTTON_LEFT) mouse_event(32, new_x, new_y);
if (button_state & YUTANI_MOUSE_BUTTON_MIDDLE) mouse_event(33, new_x, new_y);
if (button_state & YUTANI_MOUSE_BUTTON_RIGHT) mouse_event(34, new_x, new_y);
last_mouse_x = new_x;
last_mouse_y = new_y;
}
} else {
if (me->buttons & YUTANI_MOUSE_SCROLL_UP) {
scroll_up(5);
} else if (me->buttons & YUTANI_MOUSE_SCROLL_DOWN) {
scroll_down(5);
}
}
}
break;
default:
break;
}
free(m);
}
}
void maybe_flip_cursor(void) {
uint64_t ticks = get_ticks();
if (ticks > mouse_ticks + 600000LL) {
mouse_ticks = ticks;
flip_cursor();
}
}
int main(int argc, char ** argv) {
_use_freetype = 1;
_login_shell = 0;
static struct option long_opts[] = {
{"fullscreen", no_argument, 0, 'F'},
{"bitmap", no_argument, 0, 'b'},
{"login", no_argument, 0, 'l'},
{"help", no_argument, 0, 'h'},
{"kernel", no_argument, 0, 'k'},
{"grid", no_argument, 0, 'x'},
{"no-frame", no_argument, 0, 'n'},
{"scale", required_argument, 0, 's'},
{"geometry", required_argument, 0, 'g'},
{0,0,0,0}
};
/* Read some arguments */
int index, c;
while ((c = getopt_long(argc, argv, "bhxnFlks:g:", long_opts, &index)) != -1) {
if (!c) {
if (long_opts[index].flag == 0) {
c = long_opts[index].val;
}
}
switch (c) {
case 'k':
_force_kernel = 1;
break;
case 'x':
_free_size = 0;
break;
case 'l':
_login_shell = 1;
break;
case 'n':
_no_frame = 1;
break;
case 'F':
_fullscreen = 1;
_no_frame = 1;
break;
case 'b':
_use_freetype = 0;
break;
case 'h':
usage(argv);
return 0;
break;
case 's':
scale_fonts = 1;
font_scaling = atof(optarg);
break;
case 'g':
{
char * c = strstr(optarg, "x");
if (c) {
*c = '\0';
c++;
window_width = atoi(optarg);
window_height = atoi(c);
}
}
break;
case '?':
break;
default:
break;
}
}
putenv("TERM=toaru");
/* Initialize the windowing library */
yctx = yutani_init();
if (_fullscreen) {
window_width = yctx->display_width;
window_height = yctx->display_height;
}
if (_no_frame) {
window = yutani_window_create(yctx, window_width, window_height);
} else {
init_decorations();
window = yutani_window_create(yctx, window_width + decor_left_width + decor_right_width, window_height + decor_top_height + decor_bottom_height);
}
if (_fullscreen) {
yutani_set_stack(yctx, window, YUTANI_ZORDER_BOTTOM);
window->focused = 1;
} else {
window->focused = 0;
}
/* Initialize the graphics context */
ctx = init_graphics_yutani(window);
/* Clear to black */
draw_fill(ctx, rgba(0,0,0,0));
yutani_window_move(yctx, window, yctx->display_width / 2 - window->width / 2, yctx->display_height / 2 - window->height / 2);
if (_use_freetype) {
int error;
error = FT_Init_FreeType(&library);
if (error) return 1;
char * font = NULL;
size_t s;
/* XXX Use shmemfont library */
font = loadMemFont("/usr/share/fonts/DejaVuSansMono.ttf", "monospace", &s);
error = FT_New_Memory_Face(library, font, s, 0, &face); if (error) return 1;
font = loadMemFont("/usr/share/fonts/DejaVuSansMono-Bold.ttf", "monospace.bold", &s);
error = FT_New_Memory_Face(library, font, s, 0, &face_bold); if (error) return 1;
font = loadMemFont("/usr/share/fonts/DejaVuSansMono-Oblique.ttf", "monospace.italic", &s);
error = FT_New_Memory_Face(library, font, s, 0, &face_italic); if (error) return 1;
font = loadMemFont("/usr/share/fonts/DejaVuSansMono-BoldOblique.ttf", "monospace.bolditalic", &s);
error = FT_New_Memory_Face(library, font, s, 0, &face_bold_italic); if (error) return 1;
error = FT_New_Face(library, "/usr/share/fonts/VLGothic.ttf", 0, &face_extra);
error = FT_New_Face(library, "/usr/share/fonts/Symbola.ttf", 0, &face_symbol);
font = loadMemFont("/usr/share/fonts/DejaVuSans.ttf", "sans-serif", &s);
error = FT_New_Memory_Face(library, font, s, 0, &face_variable); if (error) return 1;
}
syscall_openpty(&fd_master, &fd_slave, NULL, NULL, NULL);
terminal = fdopen(fd_slave, "w");
reinit(0);
fflush(stdin);
int pid = getpid();
uint32_t f = fork();
if (getpid() != pid) {
dup2(fd_slave, 0);
dup2(fd_slave, 1);
dup2(fd_slave, 2);
if (argv[optind] != NULL) {
char * tokens[] = {argv[optind], NULL};
int i = execvp(tokens[0], tokens);
fprintf(stderr, "Failed to launch requested startup application.\n");
} else {
if (_login_shell) {
char * tokens[] = {"/bin/login",NULL};
int i = execvp(tokens[0], tokens);
} else {
char * shell = getenv("SHELL");
if (!shell) shell = "/bin/sh"; /* fallback */
char * tokens[] = {shell,NULL};
int i = execvp(tokens[0], tokens);
}
}
exit_application = 1;
return 1;
} else {
if (_force_kernel) {
/* Request kernel output to this terminal */
//syscall_system_function(4, (char **)fd_slave);
}
child_pid = f;
int fds[2] = {fd_master, fileno(yctx->sock)};
unsigned char buf[1024];
while (!exit_application) {
int index = syscall_fswait2(2,fds,200);
check_for_exit();
if (index == 0) {
maybe_flip_cursor();
int r = read(fd_master, buf, 1024);
for (uint32_t i = 0; i < r; ++i) {
ansi_put(ansi_state, buf[i]);
}
display_flip();
} else if (index == 1) {
maybe_flip_cursor();
handle_incoming();
} else if (index == 2) {
maybe_flip_cursor();
}
}
}
yutani_close(yctx, window);
return 0;
}
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