1 | |
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2 | #define _GNU_SOURCE |
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3 | #include <sys/socket.h> |
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4 | |
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5 | #include <stdio.h> |
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6 | #include <string.h> |
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7 | #include <errno.h> |
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8 | #include <arpa/inet.h> |
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9 | #include <getopt.h> |
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10 | #include <stdarg.h> |
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11 | #include <stdlib.h> |
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12 | #include <sys/wait.h> |
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13 | #include <sys/stat.h> |
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14 | #include <sys/file.h> |
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15 | #include <syslog.h> |
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16 | #include <unistd.h> |
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17 | #include <fcntl.h> |
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18 | |
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19 | #include <tcl.h> |
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20 | |
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21 | #include "config.h" |
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22 | |
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23 | #define TRUE 1 |
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24 | #define FALSE 0 |
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25 | |
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26 | #ifndef SERVERSFILE |
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27 | #define SERVERSFILE "/opt/hubzero/rappture/render/lib/renderservers.tcl" |
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28 | #endif |
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29 | |
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30 | #ifndef LOGDIR |
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31 | #define LOGDIR "/tmp" |
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32 | #endif |
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33 | |
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34 | #define ERROR(...) SysLog(LOG_ERR, __FILE__, __LINE__, __VA_ARGS__) |
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35 | #define TRACE(...) SysLog(LOG_DEBUG, __FILE__, __LINE__, __VA_ARGS__) |
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36 | #define WARN(...) SysLog(LOG_WARNING, __FILE__, __LINE__, __VA_ARGS__) |
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37 | #define INFO(...) SysLog(LOG_INFO, __FILE__, __LINE__, __VA_ARGS__) |
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38 | |
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39 | static const char *syslogLevels[] = { |
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40 | "emergency", /* System is unusable */ |
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41 | "alert", /* Action must be taken immediately */ |
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42 | "critical", /* Critical conditions */ |
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43 | "error", /* Error conditions */ |
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44 | "warning", /* Warning conditions */ |
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45 | "notice", /* Normal but significant condition */ |
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46 | "info", /* Informational */ |
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47 | "debug", /* Debug-level messages */ |
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48 | }; |
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49 | |
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50 | /* RenderServer -- |
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51 | * |
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52 | * Contains information to describe/execute a render server. |
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53 | */ |
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54 | typedef struct { |
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55 | const char *name; /* Name of server. */ |
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56 | int port; /* Port to listen to. */ |
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57 | int numCmdArgs; /* # of args in command. */ |
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58 | int numEnvArgs; /* # of args in environment. */ |
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59 | char *const *cmdArgs; /* Command to execute for |
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60 | server. */ |
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61 | char *const *envArgs; /* Environment strings to set. */ |
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62 | int listenerFd; /* Descriptor of the listener |
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63 | socket. */ |
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64 | int inputFd; /* Descriptor to dup input side of |
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65 | * server socket. */ |
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66 | int outputFd; /* Descriptor to dup output side of |
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67 | * server socket. */ |
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68 | int logStdout; /* Redirect server stdout to a |
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69 | file. */ |
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70 | int logStderr; /* Redirect server stderr to a |
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71 | file. */ |
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72 | int combineLogs; /* Combine server stdout/stderr in |
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73 | * same file. */ |
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74 | } RenderServer; |
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75 | |
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76 | static Tcl_HashTable serverTable; /* Table of render servers |
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77 | * representing services available to |
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78 | * clients. A new instance is forked |
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79 | * and executed each time a new |
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80 | * request is accepted. */ |
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81 | static int debug = FALSE; |
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82 | static pid_t serverPid; |
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83 | |
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84 | static void |
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85 | SysLog(int priority, const char *path, int lineNum, const char* fmt, ...) |
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86 | { |
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87 | #define MSG_LEN (2047) |
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88 | char message[MSG_LEN+1]; |
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89 | const char *s; |
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90 | int length; |
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91 | va_list lst; |
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92 | |
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93 | va_start(lst, fmt); |
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94 | s = strrchr(path, '/'); |
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95 | if (s == NULL) { |
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96 | s = path; |
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97 | } else { |
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98 | s++; |
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99 | } |
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100 | length = snprintf(message, MSG_LEN, "nanoscale (%d %d) %s: %s:%d ", |
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101 | serverPid, getpid(), syslogLevels[priority], s, lineNum); |
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102 | length += vsnprintf(message + length, MSG_LEN - length, fmt, lst); |
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103 | message[MSG_LEN] = '\0'; |
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104 | if (debug) { |
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105 | fprintf(stderr, "%s\n", message); |
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106 | } else { |
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107 | syslog(priority, message, length); |
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108 | } |
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109 | } |
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110 | |
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111 | static void |
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112 | Help(const char *program) |
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113 | { |
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114 | fprintf(stderr, |
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115 | "Syntax: %s [-d] [-f serversFile] [-x numVideoCards]\n", program); |
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116 | exit(1); |
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117 | } |
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118 | |
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119 | static RenderServer * |
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120 | NewServer(Tcl_Interp *interp, const char *name) |
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121 | { |
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122 | RenderServer *serverPtr; |
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123 | |
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124 | serverPtr = malloc(sizeof(RenderServer)); |
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125 | memset(serverPtr, 0, sizeof(RenderServer)); |
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126 | if (serverPtr == NULL) { |
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127 | Tcl_AppendResult(interp, "can't allocate structure for \"", |
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128 | name, "\": ", Tcl_PosixError(interp), (char *)NULL); |
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129 | return NULL; |
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130 | } |
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131 | serverPtr->name = strdup(name); |
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132 | serverPtr->outputFd = STDOUT_FILENO; |
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133 | serverPtr->inputFd = STDIN_FILENO; |
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134 | serverPtr->combineLogs = TRUE; |
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135 | serverPtr->logStdout = TRUE; |
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136 | serverPtr->logStderr = TRUE; |
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137 | return serverPtr; |
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138 | } |
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139 | |
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140 | static int |
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141 | ParseSwitches(Tcl_Interp *interp, RenderServer *serverPtr, int *objcPtr, |
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142 | Tcl_Obj ***objvPtr) |
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143 | { |
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144 | int i, objc; |
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145 | Tcl_Obj **objv; |
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146 | |
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147 | objc = *objcPtr; |
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148 | objv = *objvPtr; |
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149 | for (i = 3; i < objc; i += 2) { |
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150 | const char *string; |
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151 | char c; |
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152 | |
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153 | string = Tcl_GetString(objv[i]); |
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154 | if (string[0] != '-') { |
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155 | break; |
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156 | } |
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157 | c = string[1]; |
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158 | if ((c == 'i') && (strcmp(string, "-input") == 0)) { |
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159 | int f; |
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160 | |
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161 | if (Tcl_GetIntFromObj(interp, objv[i+1], &f) != TCL_OK) { |
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162 | return TCL_ERROR; |
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163 | } |
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164 | serverPtr->inputFd = 1; |
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165 | } else if ((c == 'o') && (strcmp(string, "-output") == 0)) { |
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166 | int f; |
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167 | |
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168 | if (Tcl_GetIntFromObj(interp, objv[i+1], &f) != TCL_OK) { |
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169 | return TCL_ERROR; |
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170 | } |
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171 | serverPtr->outputFd = 1; |
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172 | } else if ((c == 'l') && (strcmp(string, "-logstdout") == 0)) { |
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173 | int state; |
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174 | |
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175 | if (Tcl_GetBooleanFromObj(interp, objv[i+1], &state) != TCL_OK) { |
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176 | return TCL_ERROR; |
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177 | } |
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178 | serverPtr->logStdout = state; |
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179 | } else if ((c == 'l') && (strcmp(string, "-logstderr") == 0)) { |
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180 | int state; |
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181 | |
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182 | if (Tcl_GetBooleanFromObj(interp, objv[i+1], &state) != TCL_OK) { |
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183 | return TCL_ERROR; |
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184 | } |
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185 | serverPtr->logStderr = state; |
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186 | } else if ((c == 'c') && (strcmp(string, "-combinelogs") == 0)) { |
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187 | int state; |
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188 | |
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189 | if (Tcl_GetBooleanFromObj(interp, objv[i+1], &state) != TCL_OK) { |
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190 | return TCL_ERROR; |
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191 | } |
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192 | serverPtr->combineLogs = state; |
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193 | } else { |
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194 | Tcl_AppendResult(interp, "unknown switch \"", string, "\"", |
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195 | (char *)NULL); |
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196 | return TCL_ERROR; |
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197 | } |
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198 | } |
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199 | *objcPtr = objc - (i - 3); |
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200 | *objvPtr = objv + (i - 3); |
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201 | return TCL_OK; |
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202 | } |
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203 | |
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204 | /* |
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205 | * RegisterServerCmd -- |
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206 | * |
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207 | * Registers a render server to be run when a client connects |
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208 | * on the designated port. The form of the commands is |
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209 | * |
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210 | * register_server <name> <port> <cmd> <environ> |
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211 | * |
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212 | * where |
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213 | * |
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214 | * name Token for the render server. |
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215 | * port Port to listen to accept connections. |
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216 | * cmd Command to be run to start the render server. |
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217 | * environ Name-value pairs of representing environment |
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218 | * variables. |
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219 | * |
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220 | * Note that "cmd" and "environ" are variable and backslash |
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221 | * substituted. A listener socket automatically is established on |
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222 | * the given port to accept client requests. |
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223 | * |
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224 | * Example: |
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225 | * |
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226 | * register_server myServer 12345 ?switches? { |
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227 | * /path/to/myserver arg arg |
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228 | * } { |
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229 | * LD_LIBRARY_PATH $libdir/myServer |
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230 | * } |
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231 | * |
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232 | */ |
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233 | static int |
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234 | RegisterServerCmd(ClientData clientData, Tcl_Interp *interp, int objc, |
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235 | Tcl_Obj *const *objv) |
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236 | { |
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237 | Tcl_Obj *objPtr; |
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238 | const char *serverName; |
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239 | int bool, isNew; |
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240 | int f; |
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241 | int port; |
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242 | int numCmdArgs, numEnvArgs; |
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243 | char *const *cmdArgs; |
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244 | char *const *envArgs; |
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245 | struct sockaddr_in addr; |
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246 | RenderServer *serverPtr; |
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247 | Tcl_HashEntry *hPtr; |
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248 | |
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249 | if (objc < 4) { |
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250 | Tcl_AppendResult(interp, "wrong # args: should be \"", |
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251 | Tcl_GetString(objv[0]), " serverName port ?flags? cmd ?environ?", |
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252 | (char *)NULL); |
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253 | return TCL_ERROR; |
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254 | } |
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255 | serverName = Tcl_GetString(objv[1]); |
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256 | if (Tcl_GetIntFromObj(interp, objv[2], &port) != TCL_OK) { |
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257 | return TCL_ERROR; |
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258 | } |
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259 | hPtr = Tcl_CreateHashEntry(&serverTable, (char *)((long)port), &isNew); |
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260 | if (!isNew) { |
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261 | Tcl_AppendResult(interp, "a server is already listening on port ", |
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262 | Tcl_GetString(objv[2]), (char *)NULL); |
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263 | return TCL_ERROR; |
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264 | } |
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265 | serverPtr = NewServer(interp, serverName); |
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266 | if (serverPtr == NULL) { |
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267 | return TCL_ERROR; |
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268 | } |
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269 | Tcl_SetHashValue(hPtr, serverPtr); |
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270 | if (ParseSwitches(interp, serverPtr, &objc, (Tcl_Obj ***)&objv) != TCL_OK) { |
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271 | goto error; |
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272 | } |
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273 | objPtr = Tcl_SubstObj(interp, objv[3], |
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274 | TCL_SUBST_VARIABLES | TCL_SUBST_BACKSLASHES); |
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275 | if (Tcl_SplitList(interp, Tcl_GetString(objPtr), &numCmdArgs, |
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276 | (const char ***)&cmdArgs) != TCL_OK) { |
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277 | goto error; |
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278 | } |
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279 | serverPtr->cmdArgs = cmdArgs; |
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280 | serverPtr->numCmdArgs = numCmdArgs; |
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281 | |
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282 | numEnvArgs = 0; |
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283 | envArgs = NULL; |
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284 | if (objc == 5) { |
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285 | objPtr = Tcl_SubstObj(interp, objv[4], |
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286 | TCL_SUBST_VARIABLES | TCL_SUBST_BACKSLASHES); |
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287 | if (Tcl_SplitList(interp, Tcl_GetString(objPtr), &numEnvArgs, |
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288 | (const char ***)&envArgs) != TCL_OK) { |
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289 | goto error; |
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290 | } |
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291 | if (numEnvArgs & 0x1) { |
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292 | Tcl_AppendResult(interp, "odd # elements in enviroment list", |
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293 | (char *)NULL); |
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294 | goto error; |
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295 | } |
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296 | } |
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297 | serverPtr->envArgs = envArgs; |
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298 | serverPtr->numEnvArgs = numEnvArgs; |
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299 | |
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300 | /* Create a socket for listening. */ |
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301 | f = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
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302 | if (f < 0) { |
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303 | Tcl_AppendResult(interp, "can't create listerner socket for \"", |
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304 | serverPtr->name, "\": ", Tcl_PosixError(interp), (char *)NULL); |
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305 | goto error; |
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306 | } |
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307 | |
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308 | /* If the render server instance should be killed, drop the socket address |
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309 | * reservation immediately, don't linger. */ |
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310 | bool = TRUE; |
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311 | if (setsockopt(f, SOL_SOCKET, SO_REUSEADDR, &bool, sizeof(bool)) < 0) { |
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312 | Tcl_AppendResult(interp, "can't create set socket option for \"", |
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313 | serverPtr->name, "\": ", Tcl_PosixError(interp), (char *)NULL); |
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314 | goto error; |
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315 | } |
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316 | |
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317 | /* Bind this address to the socket. */ |
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318 | addr.sin_family = AF_INET; |
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319 | addr.sin_port = htons(port); |
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320 | addr.sin_addr.s_addr = htonl(INADDR_ANY); |
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321 | if (bind(f, (struct sockaddr *)&addr, sizeof(addr)) < 0) { |
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322 | Tcl_AppendResult(interp, "can't bind to socket for \"", |
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323 | serverPtr->name, "\": ", Tcl_PosixError(interp), (char *)NULL); |
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324 | goto error; |
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325 | } |
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326 | /* Listen on the specified port. */ |
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327 | if (listen(f, 5) < 0) { |
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328 | Tcl_AppendResult(interp, "can't listen to socket for \"", |
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329 | serverPtr->name, "\": ", Tcl_PosixError(interp), (char *)NULL); |
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330 | return TCL_ERROR; |
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331 | } |
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332 | serverPtr->listenerFd = f; |
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333 | |
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334 | return TCL_OK; |
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335 | error: |
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336 | free(serverPtr); |
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337 | return TCL_ERROR; |
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338 | } |
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339 | |
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340 | static int |
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341 | ParseServersFile(const char *fileName) |
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342 | { |
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343 | Tcl_Interp *interp; |
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344 | |
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345 | interp = Tcl_CreateInterp(); |
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346 | Tcl_MakeSafe(interp); |
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347 | Tcl_CreateObjCommand(interp, "register_server", RegisterServerCmd, NULL, |
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348 | NULL); |
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349 | if (Tcl_EvalFile(interp, fileName) != TCL_OK) { |
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350 | ERROR("Can't add server: %s", Tcl_GetString(Tcl_GetObjResult(interp))); |
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351 | return FALSE; |
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352 | } |
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353 | Tcl_DeleteInterp(interp); |
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354 | return TRUE; |
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355 | } |
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356 | |
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357 | int |
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358 | main(int argc, char **argv) |
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359 | { |
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360 | #ifdef SA_NOCLDWAIT |
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361 | struct sigaction action; |
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362 | #endif |
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363 | fd_set serverFds; |
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364 | int maxFd; /* Highest file descriptor in use. */ |
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365 | char display[200]; /* String used to manage the X |
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366 | * DISPLAY variable for each render |
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367 | * server instance. */ |
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368 | int maxCards; /* Maximum number of video cards, each |
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369 | * represented by a different X |
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370 | * screen. */ |
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371 | int screenNum; /* Current X screen number. */ |
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372 | Tcl_HashEntry *hPtr; |
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373 | Tcl_HashSearch iter; |
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374 | const char *fileName; /* Path to servers file. */ |
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375 | |
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376 | serverPid = getpid(); |
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377 | screenNum = 0; |
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378 | maxCards = 1; |
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379 | fileName = SERVERSFILE; |
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380 | debug = FALSE; |
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381 | |
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382 | strcpy(display, ":0.0"); |
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383 | Tcl_InitHashTable(&serverTable, TCL_ONE_WORD_KEYS); |
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384 | |
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385 | /* Process command line switches. */ |
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386 | for (;;) { |
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387 | int c; |
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388 | int option_index = 0; |
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389 | struct option long_options[] = { |
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390 | // name, has_arg, flag, val |
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391 | { 0,0,0,0 }, |
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392 | }; |
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393 | |
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394 | c = getopt_long(argc, argv, "x:f:d", long_options, &option_index); |
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395 | if (c == -1) { |
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396 | break; |
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397 | } |
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398 | |
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399 | switch(c) { |
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400 | case 'x': /* Number of video cards */ |
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401 | maxCards = strtoul(optarg, 0, 0); |
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402 | if ((maxCards < 1) || (maxCards > 10)) { |
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403 | fprintf(stderr, "Bad number of max videocards specified\n"); |
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404 | return 1; |
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405 | } |
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406 | break; |
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407 | case 'd': /* Debug */ |
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408 | debug = TRUE; |
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409 | break; |
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410 | |
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411 | case 'f': /* Server file path. */ |
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412 | fileName = strdup(optarg); |
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413 | break; |
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414 | |
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415 | default: |
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416 | fprintf(stderr,"Don't know what option '%c'.\n", c); |
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417 | Help(argv[0]); |
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418 | exit(1); |
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419 | } |
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420 | } |
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421 | |
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422 | if (!debug) { |
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423 | /* Detach this process from the controlling terminal process. The |
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424 | * current directory becomes /tmp and redirect stdin/stdout/stderr to |
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425 | * /dev/null. */ |
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426 | if (daemon(0,0) < 0) { |
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427 | ERROR("Can't daemonize nanoscale: %s", strerror(errno)); |
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428 | exit(1); |
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429 | } |
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430 | } |
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431 | serverPid = getpid(); |
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432 | if (!ParseServersFile(fileName)) { |
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433 | exit(1); |
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434 | } |
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435 | |
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436 | if (serverTable.numEntries == 0) { |
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437 | ERROR("No servers designated."); |
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438 | exit(1); |
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439 | } |
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440 | signal(SIGPIPE, SIG_IGN); |
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441 | #ifdef SA_NOCLDWAIT |
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442 | memset(&action, 0, sizeof(action)); |
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443 | action.sa_flags = SA_NOCLDWAIT; |
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444 | sigaction(SIGCHLD, &action, 0); |
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445 | #else |
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446 | signal(SIGCHLD, SIG_IGN); |
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447 | #endif |
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448 | |
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449 | /* Build the array of servers listener file descriptors. */ |
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450 | FD_ZERO(&serverFds); |
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451 | maxFd = -1; |
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452 | for (hPtr = Tcl_FirstHashEntry(&serverTable, &iter); hPtr != NULL; |
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453 | hPtr = Tcl_NextHashEntry(&iter)) { |
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454 | RenderServer *serverPtr; |
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455 | |
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456 | serverPtr = Tcl_GetHashValue(hPtr); |
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457 | FD_SET(serverPtr->listenerFd, &serverFds); |
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458 | if (serverPtr->listenerFd > maxFd) { |
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459 | maxFd = serverPtr->listenerFd; |
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460 | } |
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461 | } |
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462 | |
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463 | for (;;) { |
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464 | fd_set readFds; |
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465 | |
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466 | /* Reset using the array of server file descriptors. */ |
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467 | memcpy(&readFds, &serverFds, sizeof(serverFds)); |
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468 | if (select(maxFd+1, &readFds, NULL, NULL, 0) <= 0) { |
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469 | ERROR("Select failed: %s", strerror(errno)); |
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470 | break; /* Error on select. */ |
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471 | } |
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472 | for (hPtr = Tcl_FirstHashEntry(&serverTable, &iter); hPtr != NULL; |
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473 | hPtr = Tcl_NextHashEntry(&iter)) { |
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474 | RenderServer *serverPtr; |
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475 | pid_t child; |
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476 | int sock; |
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477 | socklen_t length; |
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478 | struct sockaddr_in newaddr; |
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479 | |
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480 | serverPtr = Tcl_GetHashValue(hPtr); |
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481 | if (!FD_ISSET(serverPtr->listenerFd, &readFds)) { |
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482 | continue; |
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483 | } |
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484 | /* Rotate the display's screen number. If we have multiple video |
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485 | * cards, try to spread the jobs out among them. */ |
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486 | screenNum++; |
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487 | if (screenNum >= maxCards) { |
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488 | screenNum = 0; |
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489 | } |
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490 | /* Accept the new connection. */ |
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491 | length = sizeof(newaddr); |
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492 | #ifdef HAVE_ACCEPT4 |
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493 | sock = accept4(serverPtr->listenerFd, (struct sockaddr *)&newaddr, |
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494 | &length, SOCK_CLOEXEC); |
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495 | #else |
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496 | sock = accept(serverPtr->listenerFd, (struct sockaddr *)&newaddr, |
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497 | &length); |
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498 | #endif |
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499 | if (sock < 0) { |
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500 | ERROR("Can't accept server \"%s\": %s", serverPtr->name, |
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501 | strerror(errno)); |
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502 | exit(1); |
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503 | } |
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504 | #ifndef HAVE_ACCEPT4 |
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505 | int flags = fcntl(sock, F_GETFD); |
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506 | flags |= FD_CLOEXEC; |
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507 | if (fcntl(sock, F_SETFD, flags) < 0) { |
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508 | ERROR("Can't set FD_CLOEXEC on socket \"%s\": %s", |
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509 | serverPtr->name, strerror(errno)); |
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510 | exit(1); |
---|
511 | } |
---|
512 | #endif |
---|
513 | INFO("Connecting \"%s\" to %s\n", serverPtr->name, |
---|
514 | inet_ntoa(newaddr.sin_addr)); |
---|
515 | |
---|
516 | /* Fork the new process. Connect I/O to the new socket. */ |
---|
517 | child = fork(); |
---|
518 | if (child < 0) { |
---|
519 | ERROR("Can't fork \"%s\": %s", serverPtr->name, |
---|
520 | strerror(errno)); |
---|
521 | continue; |
---|
522 | } |
---|
523 | if (child == 0) { /* Child process. */ |
---|
524 | int i; |
---|
525 | |
---|
526 | umask(0); |
---|
527 | if ((!debug) && (setsid() < 0)) { |
---|
528 | ERROR("Can't setsid \"%s\": %s", serverPtr->name, |
---|
529 | strerror(errno)); |
---|
530 | exit(1); |
---|
531 | } |
---|
532 | if ((!debug) && ((chdir("/")) < 0)) { |
---|
533 | ERROR("Can't change to root directory for \"%s\": %s", |
---|
534 | serverPtr->name, strerror(errno)); |
---|
535 | exit(1); |
---|
536 | } |
---|
537 | if (serverPtr->combineLogs) { |
---|
538 | char path[BUFSIZ]; |
---|
539 | int newFd; |
---|
540 | |
---|
541 | sprintf(path, "%s/%s-%d.log", LOGDIR, |
---|
542 | serverPtr->name, getpid()); |
---|
543 | if (serverPtr->logStdout) { |
---|
544 | newFd = open(path, O_WRONLY | O_CREAT| O_TRUNC, 0600); |
---|
545 | } else { |
---|
546 | newFd = open("/dev/null", O_WRONLY, 0600); |
---|
547 | } |
---|
548 | if (newFd < 0) { |
---|
549 | ERROR("%s: can't open \"%s\": %s", serverPtr->name, |
---|
550 | path, strerror(errno)); |
---|
551 | exit(1); |
---|
552 | } |
---|
553 | if (dup2(newFd, 1) < 0) { |
---|
554 | ERROR("%s: can't dup stdout to \"%s\": %s", |
---|
555 | serverPtr->name, path, strerror(errno)); |
---|
556 | exit(1); |
---|
557 | } |
---|
558 | if (dup2(newFd, 2) < 0) { |
---|
559 | ERROR("%s: can't dup stderr to \"%s\": %s", |
---|
560 | serverPtr->name, path, strerror(errno)); |
---|
561 | exit(1); |
---|
562 | } |
---|
563 | } else { |
---|
564 | char path[BUFSIZ]; |
---|
565 | int newFd; |
---|
566 | |
---|
567 | sprintf(path, "%s/%s-%d.stdout", LOGDIR, |
---|
568 | serverPtr->name, getpid()); |
---|
569 | if (serverPtr->logStdout) { |
---|
570 | newFd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0600); |
---|
571 | } else { |
---|
572 | newFd = open("/dev/null", O_WRONLY, 0600); |
---|
573 | } |
---|
574 | if (newFd < 0) { |
---|
575 | ERROR("%s: can't open \"%s\": %s", serverPtr->name, |
---|
576 | path, strerror(errno)); |
---|
577 | exit(1); |
---|
578 | } |
---|
579 | if (dup2(newFd, 1) < 0) { |
---|
580 | ERROR("%s: can't dup stdout to \"%s\": %s", |
---|
581 | serverPtr->name, path, strerror(errno)); |
---|
582 | exit(1); |
---|
583 | } |
---|
584 | sprintf(path, "%s/%s-%d.stderr", LOGDIR, |
---|
585 | serverPtr->name, getpid()); |
---|
586 | if (serverPtr->logStderr) { |
---|
587 | newFd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0600); |
---|
588 | } else { |
---|
589 | newFd = open("/dev/null", O_WRONLY, 0600); |
---|
590 | } |
---|
591 | if (newFd < 0) { |
---|
592 | ERROR("%s: can't open \"%s\": %s", serverPtr->name, |
---|
593 | path, strerror(errno)); |
---|
594 | exit(1); |
---|
595 | } |
---|
596 | if (dup2(newFd, 1) < 0) { |
---|
597 | ERROR("%s: can't dup stderr to \"%s\": %s", |
---|
598 | serverPtr->name, path, strerror(errno)); |
---|
599 | exit(1); |
---|
600 | } |
---|
601 | } |
---|
602 | /* Dup the socket to descriptors, normally 3 and 4 */ |
---|
603 | if (dup2(sock, serverPtr->inputFd) < 0) { /* Stdin */ |
---|
604 | ERROR("%s: can't dup stdin: %s", serverPtr->name, |
---|
605 | strerror(errno)); |
---|
606 | exit(1); |
---|
607 | } |
---|
608 | if (dup2(sock, serverPtr->outputFd) < 0) { /* Stdout */ |
---|
609 | ERROR("%s: can't dup stdout: %s", serverPtr->name, |
---|
610 | strerror(errno)); |
---|
611 | exit(1); |
---|
612 | } |
---|
613 | for(i = serverPtr->outputFd + 1; i <= FD_SETSIZE; i++) { |
---|
614 | close(i); /* Close all the other descriptors. */ |
---|
615 | } |
---|
616 | |
---|
617 | /* Set the screen number in the DISPLAY variable. */ |
---|
618 | display[3] = screenNum + '0'; |
---|
619 | setenv("DISPLAY", display, 1); |
---|
620 | /* Set the enviroment, if necessary. */ |
---|
621 | for (i = 0; i < serverPtr->numEnvArgs; i += 2) { |
---|
622 | setenv(serverPtr->envArgs[i], serverPtr->envArgs[i+1], 1); |
---|
623 | } |
---|
624 | INFO("Executing %s: client %s, %s on DISPLAY=%s", |
---|
625 | serverPtr->name, inet_ntoa(newaddr.sin_addr), |
---|
626 | serverPtr->cmdArgs[0], display); |
---|
627 | /* Replace the current process with the render server. */ |
---|
628 | execvp(serverPtr->cmdArgs[0], serverPtr->cmdArgs); |
---|
629 | ERROR("Can't execute \"%s\": %s", serverPtr->cmdArgs[0], |
---|
630 | strerror(errno)); |
---|
631 | exit(1); |
---|
632 | } else { |
---|
633 | close(sock); |
---|
634 | } |
---|
635 | } |
---|
636 | } |
---|
637 | exit(1); |
---|
638 | } |
---|