1 | /* |
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2 | * term swallow a terminal-based application |
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3 | * Copyright (c) 2006 Sam Hocevar <sam@zoy.org> |
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4 | * All Rights Reserved |
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5 | * |
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6 | * $Id: term.c 1432 2006-11-27 01:58:00Z sam $ |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the Do What The Fuck You Want To |
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10 | * Public License, Version 2, as published by Sam Hocevar. See |
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11 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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12 | */ |
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13 | |
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14 | #include "config.h" |
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15 | #include "common.h" |
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16 | |
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17 | #if !defined __KERNEL__ |
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18 | # include <stdio.h> |
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19 | # include <string.h> |
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20 | # include <stdlib.h> |
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21 | # include <unistd.h> |
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22 | # include <fcntl.h> |
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23 | # include <sys/ioctl.h> |
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24 | # if defined HAVE_PTY_H |
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25 | # include <pty.h> /* for openpty and forkpty */ |
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26 | # else |
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27 | # include <util.h> /* for OS X */ |
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28 | # endif |
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29 | #endif |
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30 | |
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31 | #include "cucul.h" |
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32 | #include "caca.h" |
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33 | |
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34 | #define XTAB 3 |
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35 | #define YTAB 2 |
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36 | |
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37 | struct screen |
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38 | { |
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39 | cucul_canvas_t *cv; |
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40 | int fd; |
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41 | unsigned char *buf; |
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42 | long int total; |
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43 | int w, h; |
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44 | }; |
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45 | |
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46 | static int create_pty(char *cmd, unsigned int w, unsigned int h); |
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47 | static int set_tty_size(int fd, unsigned int w, unsigned int h); |
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48 | |
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49 | int main(int argc, char **argv) |
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50 | { |
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51 | static cucul_canvas_t *cv; |
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52 | static caca_display_t *dp; |
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53 | static struct screen *screen; |
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54 | int pty = 0, prevpty = 0, i, n, w, h, eof = 0, refresh = 1, command = 0; |
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55 | |
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56 | if(argc < 2) |
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57 | { |
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58 | fprintf(stderr, "usage: %s <cmd1> [<cmd2> [<cmd3> ...]]\n", argv[0]); |
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59 | fprintf(stderr, "eg. \"%s zsh bash\"\n", argv[0]); |
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60 | return 1; |
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61 | } |
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62 | |
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63 | cv = cucul_create_canvas(0, 0); |
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64 | dp = caca_create_display(cv); |
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65 | if(!dp) |
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66 | return 1; |
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67 | |
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68 | n = argc - 1; |
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69 | screen = malloc(n * sizeof(struct screen)); |
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70 | |
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71 | w = cucul_get_canvas_width(cv); |
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72 | h = cucul_get_canvas_height(cv); |
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73 | |
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74 | w = w <= XTAB * n ? 1 : w - XTAB * n; |
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75 | h = h <= YTAB * n ? 1 : h - YTAB * n; |
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76 | |
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77 | for(i = 0; i < n; i++) |
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78 | screen[i].cv = cucul_create_canvas(w, h); |
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79 | |
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80 | cucul_set_color_ansi(cv, CUCUL_LIGHTRED, CUCUL_BLACK); |
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81 | cucul_draw_cp437_box(cv, (n - 1 - pty) * XTAB, pty * YTAB, |
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82 | w + (n - 1 - pty) * XTAB + 1, h + pty * YTAB + 1); |
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83 | |
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84 | caca_refresh_display(dp); |
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85 | |
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86 | for(i = 0; i < n; i++) |
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87 | { |
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88 | screen[i].buf = NULL; |
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89 | screen[i].total = 0; |
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90 | screen[i].fd = create_pty(argv[i + 1], w, h); |
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91 | if(screen[i].fd < 0) |
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92 | return -1; |
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93 | } |
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94 | |
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95 | for(;;) |
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96 | { |
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97 | struct timeval tv; |
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98 | fd_set fdset; |
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99 | caca_event_t ev; |
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100 | int i, maxfd = 0, ret; |
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101 | |
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102 | /* Read data, if any */ |
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103 | FD_ZERO(&fdset); |
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104 | for(i = 0; i < n; i++) |
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105 | { |
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106 | FD_SET(screen[i].fd, &fdset); |
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107 | if(screen[i].fd > maxfd) |
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108 | maxfd = screen[i].fd; |
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109 | } |
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110 | tv.tv_sec = 0; |
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111 | tv.tv_usec = 50000; |
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112 | ret = select(maxfd + 1, &fdset, NULL, NULL, &tv); |
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113 | |
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114 | if(ret < 0) |
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115 | { |
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116 | if(errno == EINTR) |
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117 | ; /* We probably got a SIGWINCH, ignore it */ |
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118 | else |
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119 | { |
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120 | for(i = 0; i < n; i++) |
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121 | if(screen[i].total) |
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122 | break; |
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123 | if(i == n) |
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124 | break; |
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125 | } |
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126 | } |
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127 | else if(ret) for(i = 0; i < n; i++) |
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128 | { |
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129 | if(FD_ISSET(screen[i].fd, &fdset)) |
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130 | { |
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131 | ssize_t n; |
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132 | |
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133 | screen[i].buf = realloc(screen[i].buf, screen[i].total + 4096); |
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134 | n = read(screen[i].fd, screen[i].buf + screen[i].total, 4096); |
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135 | |
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136 | if(n > 0) |
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137 | screen[i].total += n; |
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138 | else if(n == 0 || errno != EWOULDBLOCK) |
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139 | eof = 1; |
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140 | } |
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141 | } |
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142 | |
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143 | for(i = 0; i < n; i++) if(screen[i].total) |
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144 | { |
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145 | unsigned long int bytes; |
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146 | |
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147 | bytes = cucul_import_memory(screen[i].cv, screen[i].buf, screen[i].total, "utf8"); |
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148 | |
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149 | if(bytes > 0) |
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150 | { |
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151 | screen[i].total -= bytes; |
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152 | memmove(screen[i].buf, screen[i].buf + bytes, screen[i].total); |
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153 | refresh = 1; |
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154 | } |
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155 | } |
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156 | |
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157 | /* Get events, if any */ |
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158 | ret = caca_get_event(dp, CACA_EVENT_ANY, &ev, 0); |
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159 | if(ret && (ev.type & CACA_EVENT_KEY_PRESS)) |
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160 | { |
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161 | if(command) |
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162 | { |
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163 | command = 0; |
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164 | |
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165 | switch(ev.data.key.ch) |
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166 | { |
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167 | case CACA_KEY_CTRL_A: |
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168 | pty ^= prevpty; |
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169 | prevpty ^= pty; |
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170 | pty ^= prevpty; |
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171 | refresh = 1; |
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172 | break; |
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173 | case 'n': |
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174 | case ' ': |
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175 | case '\0': |
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176 | case CACA_KEY_CTRL_N: |
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177 | prevpty = pty; |
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178 | pty = (pty + 1) % n; |
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179 | refresh = 1; |
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180 | break; |
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181 | case 'p': |
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182 | case CACA_KEY_CTRL_P: |
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183 | prevpty = pty; |
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184 | pty = (pty + n - 1) % n; |
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185 | refresh = 1; |
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186 | break; |
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187 | } |
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188 | } |
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189 | else |
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190 | { |
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191 | switch(ev.data.key.ch) |
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192 | { |
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193 | case CACA_KEY_CTRL_A: |
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194 | command = 1; break; |
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195 | case CACA_KEY_UP: |
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196 | write(screen[pty].fd, "\x1b[A", 3); break; |
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197 | case CACA_KEY_DOWN: |
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198 | write(screen[pty].fd, "\x1b[B", 3); break; |
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199 | case CACA_KEY_RIGHT: |
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200 | write(screen[pty].fd, "\x1b[C", 3); break; |
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201 | case CACA_KEY_LEFT: |
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202 | write(screen[pty].fd, "\x1b[D", 3); break; |
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203 | default: |
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204 | write(screen[pty].fd, &ev.data.key.ch, 1); break; |
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205 | } |
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206 | } |
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207 | } |
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208 | else if(ret && (ev.type & CACA_EVENT_RESIZE)) |
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209 | { |
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210 | w = cucul_get_canvas_width(cv); |
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211 | h = cucul_get_canvas_height(cv); |
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212 | w = w <= XTAB * n ? 1 : w - XTAB * n; |
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213 | h = h <= YTAB * n ? 1 : h - YTAB * n; |
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214 | for(i = 0; i < n; i++) |
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215 | { |
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216 | cucul_set_canvas_size(screen[i].cv, w, h); |
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217 | set_tty_size(screen[i].fd, w, h); |
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218 | } |
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219 | cucul_clear_canvas(cv); |
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220 | refresh = 1; |
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221 | } |
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222 | |
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223 | /* Refresh screen */ |
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224 | if(refresh) |
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225 | { |
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226 | refresh = 0; |
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227 | |
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228 | for(i = 0; i < n; i++) |
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229 | { |
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230 | int j = (pty + n - 1 - i) % n; |
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231 | cucul_blit(cv, (n - 1 - j) * XTAB + 1, |
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232 | j * YTAB + 1, screen[j].cv, NULL); |
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233 | cucul_draw_cp437_box(cv, (n - 1 - j) * XTAB, j * YTAB, |
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234 | w + (n - 1 - j) * XTAB + 1, h + j * YTAB + 1); |
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235 | } |
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236 | caca_refresh_display(dp); |
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237 | } |
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238 | |
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239 | if(eof) |
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240 | { |
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241 | for(i = 0; i < n; i++) |
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242 | if(screen[i].total) |
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243 | break; |
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244 | if(i == n) |
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245 | break; |
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246 | } |
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247 | } |
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248 | |
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249 | caca_get_event(dp, CACA_EVENT_KEY_PRESS, NULL, -1); |
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250 | |
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251 | /* Clean up */ |
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252 | caca_free_display(dp); |
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253 | cucul_free_canvas(cv); |
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254 | for(i = 0; i < n; i++) |
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255 | cucul_free_canvas(screen[i].cv); |
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256 | |
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257 | return 0; |
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258 | } |
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259 | |
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260 | static int create_pty(char *cmd, unsigned int w, unsigned int h) |
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261 | { |
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262 | char **argv; |
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263 | int fd; |
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264 | pid_t pid; |
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265 | |
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266 | pid = forkpty(&fd, NULL, NULL, NULL); |
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267 | if(pid < 0) |
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268 | { |
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269 | fprintf(stderr, "forkpty() error\n"); |
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270 | return -1; |
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271 | } |
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272 | else if(pid == 0) |
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273 | { |
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274 | set_tty_size(0, w, h); |
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275 | putenv("CACA_DRIVER=slang"); |
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276 | putenv("TERM=xterm"); |
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277 | argv = malloc(2 * sizeof(char *)); |
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278 | argv[0] = cmd; |
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279 | argv[1] = NULL; |
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280 | execvp(cmd, argv); |
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281 | fprintf(stderr, "execvp() error\n"); |
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282 | return -1; |
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283 | } |
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284 | |
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285 | fcntl(fd, F_SETFL, O_NDELAY); |
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286 | return fd; |
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287 | #if 0 |
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288 | fprintf(stderr, "forkpty() not available\n"); |
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289 | return -1; |
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290 | #endif |
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291 | } |
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292 | |
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293 | static int set_tty_size(int fd, unsigned int w, unsigned int h) |
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294 | { |
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295 | struct winsize ws; |
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296 | |
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297 | memset(&ws, 0, sizeof(ws)); |
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298 | ws.ws_row = h; |
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299 | ws.ws_col = w; |
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300 | ioctl(fd, TIOCSWINSZ, (char *)&ws); |
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301 | |
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302 | return 0; |
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303 | } |
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304 | |
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