1 | #include <errno.h> |
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2 | #include <fcntl.h> |
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3 | #include <glob.h> |
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4 | #include <limits.h> |
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5 | #include <stdio.h> |
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6 | #include <stdlib.h> |
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7 | #include <unistd.h> |
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8 | |
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9 | #include <sys/socket.h> |
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10 | #include <sys/un.h> |
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11 | #include <sys/types.h> |
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12 | #include <sys/stat.h> |
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13 | |
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14 | #include <caca.h> |
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15 | |
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16 | #include "config.h" |
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17 | #include "neercs.h" |
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18 | |
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19 | char * build_socket_path(char *socket_dir, char *session_name, int client) |
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20 | { |
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21 | char *path, *dir; |
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22 | path = (char *)malloc(PATH_MAX+1); |
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23 | dir = socket_dir; |
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24 | if(!dir) |
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25 | dir = getenv("NEERCSDIR"); |
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26 | if(!dir) |
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27 | dir = getenv("TMPDIR"); |
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28 | if(!dir) |
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29 | dir = "/tmp"; |
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30 | if(path) |
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31 | snprintf(path, PATH_MAX+1, "%s/neercs.%s%s.sock", dir, session_name, client?"":".srv"); |
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32 | return path; |
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33 | } |
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34 | |
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35 | int create_client_socket(struct screen_list* screen_list) |
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36 | { |
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37 | int sock; |
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38 | struct sockaddr_un myaddr; |
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39 | |
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40 | sock = socket(AF_UNIX, SOCK_DGRAM, 0); |
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41 | |
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42 | if(sock < 0) |
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43 | { |
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44 | perror("create_client_socket:socket"); |
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45 | return errno; |
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46 | } |
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47 | |
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48 | memset(&myaddr, 0, sizeof(struct sockaddr_un)); |
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49 | |
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50 | myaddr.sun_family = AF_UNIX; |
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51 | strncpy(myaddr.sun_path, screen_list->c_socket_path, sizeof(myaddr.sun_path) - 1); |
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52 | |
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53 | unlink(screen_list->c_socket_path); |
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54 | |
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55 | if(bind(sock, (struct sockaddr *)&myaddr, sizeof(struct sockaddr_un)) < 0) |
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56 | { |
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57 | free(screen_list->c_socket_path); |
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58 | screen_list->c_socket_path = NULL; |
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59 | close(sock); |
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60 | perror("create_client_socket:bind"); |
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61 | return errno; |
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62 | } |
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63 | fcntl(sock, F_SETFL, O_NONBLOCK); |
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64 | |
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65 | debug("Client listening on %s (%d)", screen_list->c_socket_path, sock); |
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66 | |
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67 | screen_list->c_socket = sock; |
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68 | |
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69 | return 0; |
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70 | } |
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71 | |
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72 | int create_server_socket(struct screen_list* screen_list) |
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73 | { |
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74 | int sock; |
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75 | struct sockaddr_un myaddr; |
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76 | |
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77 | sock = socket(AF_UNIX, SOCK_DGRAM, 0); |
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78 | |
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79 | if(sock < 0) |
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80 | { |
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81 | perror("create_server_socket:socket"); |
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82 | return errno; |
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83 | } |
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84 | |
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85 | memset(&myaddr, 0, sizeof(struct sockaddr_un)); |
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86 | |
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87 | myaddr.sun_family = AF_UNIX; |
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88 | strncpy(myaddr.sun_path, screen_list->s_socket_path, sizeof(myaddr.sun_path) - 1); |
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89 | |
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90 | unlink(screen_list->c_socket_path); |
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91 | |
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92 | if(bind(sock, (struct sockaddr *)&myaddr, sizeof(struct sockaddr_un)) < 0) |
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93 | { |
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94 | free(screen_list->s_socket_path); |
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95 | screen_list->s_socket_path = NULL; |
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96 | close(sock); |
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97 | perror("create_socket:bind"); |
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98 | return errno; |
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99 | } |
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100 | fcntl(sock, F_SETFL, O_NONBLOCK); |
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101 | |
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102 | debug("Client listening on %s (%d)", screen_list->s_socket_path, sock); |
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103 | |
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104 | screen_list->s_socket = sock; |
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105 | |
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106 | return 0; |
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107 | } |
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108 | |
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109 | char ** list_sockets(char *socket_dir, char *session_name) |
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110 | { |
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111 | char *pattern, *dir; |
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112 | glob_t globbuf; |
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113 | |
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114 | globbuf.gl_pathv = NULL; |
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115 | |
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116 | pattern = (char *)malloc(PATH_MAX+1); |
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117 | |
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118 | dir = socket_dir; |
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119 | if(!dir) |
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120 | dir = getenv("NEERCSDIR"); |
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121 | if(!dir) |
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122 | dir = getenv("TMPDIR"); |
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123 | if(!dir) |
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124 | dir = "/tmp"; |
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125 | |
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126 | if(!pattern) |
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127 | return globbuf.gl_pathv; |
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128 | |
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129 | if(session_name && strlen(session_name)+strlen(dir)+13<PATH_MAX) |
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130 | sprintf(pattern, "%s/neercs.%s.srv.sock", dir, session_name); |
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131 | else |
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132 | snprintf(pattern, PATH_MAX, "%s/neercs.*.srv.sock", dir); |
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133 | pattern[PATH_MAX] = '\0'; |
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134 | |
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135 | debug("Looking for sockets in the form %s", pattern); |
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136 | |
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137 | glob(pattern, 0, NULL, &globbuf); |
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138 | |
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139 | free(pattern); |
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140 | |
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141 | return globbuf.gl_pathv; |
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142 | } |
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143 | |
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144 | char * connect_server(struct screen_list* screen_list) |
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145 | { |
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146 | int sock; |
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147 | struct sockaddr_un addr; |
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148 | char *p, *s; |
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149 | |
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150 | debug("Connecting to %s", screen_list->s_socket_path); |
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151 | |
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152 | /* Open the socket */ |
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153 | if ((sock = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0) { |
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154 | perror("connect_server:socket"); |
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155 | return NULL; |
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156 | } |
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157 | |
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158 | memset(&addr,0,sizeof(addr)); |
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159 | addr.sun_family = AF_UNIX; |
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160 | strcpy(addr.sun_path,screen_list->s_socket_path); |
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161 | if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) |
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162 | { |
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163 | fprintf(stderr, "Failed to connect to %s: %s\n", screen_list->s_socket_path, strerror(errno)); |
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164 | return NULL; |
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165 | } |
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166 | fcntl(sock, F_SETFL, O_NONBLOCK); |
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167 | |
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168 | screen_list->s_socket = sock; |
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169 | |
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170 | p = strrchr(screen_list->s_socket_path, '/'); |
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171 | p+=8; /* skip neercs. */ |
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172 | s = strdup(p); |
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173 | p = strrchr(s, '.'); |
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174 | *p = '\0'; /* drop .sock */ |
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175 | p = strrchr(s, '.'); |
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176 | *p = '\0'; /* drop .srv */ |
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177 | p = strdup(s); |
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178 | free(s); |
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179 | return p; |
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180 | } |
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181 | |
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182 | int connect_client(struct screen_list* screen_list) |
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183 | { |
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184 | int sock; |
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185 | struct sockaddr_un addr; |
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186 | |
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187 | debug("Connecting to %s", screen_list->c_socket_path); |
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188 | |
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189 | /* Open the socket */ |
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190 | if ((sock = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0) { |
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191 | perror("connect_client:socket"); |
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192 | return 1; |
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193 | } |
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194 | |
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195 | memset(&addr,0,sizeof(addr)); |
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196 | addr.sun_family = AF_UNIX; |
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197 | strcpy(addr.sun_path,screen_list->c_socket_path); |
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198 | if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) |
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199 | { |
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200 | fprintf(stderr, "Failed to connect to %s: %s\n", screen_list->c_socket_path, strerror(errno)); |
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201 | return 1; |
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202 | } |
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203 | fcntl(sock, F_SETFL, O_NONBLOCK); |
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204 | |
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205 | screen_list->c_socket = sock; |
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206 | |
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207 | return 0; |
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208 | } |
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209 | |
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210 | int request_attach(struct screen_list* screen_list) |
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211 | { |
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212 | char buf[32]; |
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213 | int bytes; |
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214 | |
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215 | bytes = snprintf(buf, sizeof(buf)-1, "ATTACH %10d%c%10d", |
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216 | cucul_get_canvas_width(screen_list->cv), |
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217 | ' ', |
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218 | cucul_get_canvas_height(screen_list->cv)); |
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219 | buf[bytes] = '\0'; |
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220 | debug("Requesting attach: %s", buf); |
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221 | return write(screen_list->s_socket, buf, strlen(buf)) <= 0; |
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222 | } |
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223 | |
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224 | int send_event(caca_event_t ev, struct screen_list* screen_list) |
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225 | { |
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226 | enum caca_event_type t; |
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227 | |
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228 | t = caca_get_event_type(&ev); |
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229 | |
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230 | if(t & CACA_EVENT_KEY_PRESS) |
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231 | { |
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232 | char buf[16]; |
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233 | int bytes; |
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234 | bytes = snprintf(buf, sizeof(buf)-1, "KEY %d", caca_get_event_key_ch(&ev)); |
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235 | buf[bytes] = '\0'; |
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236 | debug("Sending key press to server: %s", buf); |
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237 | return write(screen_list->s_socket, buf, strlen(buf)) <= 0; |
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238 | } |
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239 | else if(t & CACA_EVENT_RESIZE) |
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240 | { |
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241 | char buf[32]; |
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242 | int bytes; |
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243 | bytes = snprintf(buf, sizeof(buf)-1, "RESIZE %10d%c%10d", |
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244 | caca_get_event_resize_width(&ev), |
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245 | ' ', |
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246 | caca_get_event_resize_height(&ev)); |
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247 | buf[bytes] = '\0'; |
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248 | debug("Sending resize to server: %s", buf); |
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249 | return write(screen_list->s_socket, buf, strlen(buf)) <= 0; |
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250 | } |
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251 | else if(t & CACA_EVENT_QUIT) |
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252 | return write(screen_list->s_socket, "QUIT", strlen("QUIT")) <= 0; |
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253 | |
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254 | return 0; |
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255 | } |
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256 | |
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