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annotate lphobos/std/process.d @ 837:331a176c1f4f

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Removed error on naked, not fully complete, but I'll be doing more work on it during this Christmas, and some things do work. Fixed taking delegate of final class method. see mini/delegate3.d.
author Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
date Tue, 09 Dec 2008 14:07:30 +0100
parents 88e23f8c2354
children
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1
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2 /*
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3 * Copyright (C) 2003-2004 by Digital Mars, www.digitalmars.com
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4 * Written by Matthew Wilson and Walter Bright
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5 *
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6 * Incorporating idea (for execvpe() on Linux) from Russ Lewis
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7 *
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8 * Updated: 21st August 2004
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9 *
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10 * This software is provided 'as-is', without any express or implied
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11 * warranty. In no event will the authors be held liable for any damages
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12 * arising from the use of this software.
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13 *
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14 * Permission is granted to anyone to use this software for any purpose,
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15 * including commercial applications, and to alter it and redistribute it
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16 * freely, subject to the following restrictions:
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17 *
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18 * o The origin of this software must not be misrepresented; you must not
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19 * claim that you wrote the original software. If you use this software
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20 * in a product, an acknowledgment in the product documentation would be
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21 * appreciated but is not required.
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22 * o Altered source versions must be plainly marked as such, and must not
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23 * be misrepresented as being the original software.
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24 * o This notice may not be removed or altered from any source
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25 * distribution.
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26 */
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27 /* NOTE: This file has been patched from the original DMD distribution to
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28 work with the GDC compiler.
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29
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30 Modified by David Friedman, October 2004
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31 */
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32
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33 /**
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34 * Macros:
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35 * WIKI=Phobos/StdProcess
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36 */
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37
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38
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39 module std.process;
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40
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41 private import std.c.stdlib;
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42 private import std.c.string;
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43 private import std.string;
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44 private import std.c.process;
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45
662
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46 version(linux) version = Unix;
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47
473
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48 /**
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49 * Execute command in a _command shell.
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50 *
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51 * Returns: exit status of command
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52 */
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53
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54 int system(char[] command)
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55 {
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56 return std.c.process.system(toStringz(command));
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57 }
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58
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59 private void toAStringz(char[][] a, char**az)
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60 {
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61 foreach(char[] s; a)
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62 {
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63 *az++ = toStringz(s);
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64 }
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65 *az = null;
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66 }
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67
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68
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69 /* ========================================================== */
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70
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71 //version (Windows)
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72 //{
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73 // int spawnvp(int mode, char[] pathname, char[][] argv)
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74 // {
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75 // char** argv_ = cast(char**)alloca((char*).sizeof * (1 + argv.length));
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76 //
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77 // toAStringz(argv, argv_);
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78 //
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79 // return std.c.process.spawnvp(mode, toStringz(pathname), argv_);
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80 // }
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81 //}
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82
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83 // Incorporating idea (for spawnvp() on linux) from Dave Fladebo
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84
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85 alias std.c.process._P_WAIT P_WAIT;
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86 alias std.c.process._P_NOWAIT P_NOWAIT;
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87
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88 int spawnvp(int mode, char[] pathname, char[][] argv)
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89 {
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90 char** argv_ = cast(char**)alloca((char*).sizeof * (1 + argv.length));
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91
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92 toAStringz(argv, argv_);
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93
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94 version(Unix)
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95 {
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96 return _spawnvp(mode, toStringz(pathname), argv_);
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97 }
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98 else
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99 {
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100 return std.c.process.spawnvp(mode, toStringz(pathname), argv_);
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101 }
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102 }
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103
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104 version(Unix)
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105 {
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106 version(linux) import std.c.linux.linux;
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107 else import std.c.unix.unix;
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108 int _spawnvp(int mode, char *pathname, char **argv)
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109 {
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110 int retval = 0;
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111 pid_t pid = fork();
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112
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113 if(!pid)
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114 { // child
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115 std.c.process.execvp(pathname, argv);
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116 goto Lerror;
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117 }
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118 else if(pid > 0)
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119 { // parent
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120 if(mode == _P_NOWAIT)
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121 {
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122 retval = pid; // caller waits
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123 }
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124 else
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125 {
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126 while(1)
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127 {
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128 int status;
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129 pid_t wpid = waitpid(pid, &status, 0);
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130 if(exited(status))
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131 {
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132 retval = exitstatus(status);
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133 break;
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134 }
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135 else if(signaled(status))
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136 {
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137 retval = -termsig(status);
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138 break;
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139 }
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140 else if(stopped(status)) // ptrace support
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141 continue;
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142 else
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143 goto Lerror;
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144 }
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145 }
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146
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147 return retval;
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148 }
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149
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150 Lerror:
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151 retval = getErrno;
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152 throw new Exception(
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153 "Cannot spawn " ~ toString(pathname) ~ "; "
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154 ~ toString(strerror(retval))
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155 ~ " [errno " ~ toString(retval) ~ "]");
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156 } // _spawnvp
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157 private
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158 {
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159 bool stopped(int status) { return cast(bool)((status & 0xff) == 0x7f); }
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160 bool signaled(int status) { return cast(bool)((cast(char)((status & 0x7f) + 1) >> 1) > 0); }
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161 int termsig(int status) { return status & 0x7f; }
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162 bool exited(int status) { return cast(bool)((status & 0x7f) == 0); }
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163 int exitstatus(int status) { return (status & 0xff00) >> 8; }
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164 } // private
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165 } // version(linux)
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166
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167 /* ========================================================== */
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168
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169 /**
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170 * Execute program specified by pathname, passing it the arguments (argv)
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171 * and the environment (envp), returning the exit status.
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172 * The 'p' versions of exec search the PATH environment variable
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173 * setting for the program.
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174 */
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175
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176 int execv(char[] pathname, char[][] argv)
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177 {
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178 char** argv_ = cast(char**)alloca((char*).sizeof * (1 + argv.length));
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179
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180 toAStringz(argv, argv_);
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181
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182 return std.c.process.execv(toStringz(pathname), argv_);
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183 }
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184
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185 /** ditto */
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186 int execve(char[] pathname, char[][] argv, char[][] envp)
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187 {
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188 char** argv_ = cast(char**)alloca((char*).sizeof * (1 + argv.length));
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189 char** envp_ = cast(char**)alloca((char*).sizeof * (1 + envp.length));
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190
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191 toAStringz(argv, argv_);
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192 toAStringz(envp, envp_);
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193
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194 return std.c.process.execve(toStringz(pathname), argv_, envp_);
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195 }
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196
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197 /** ditto */
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198 int execvp(char[] pathname, char[][] argv)
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199 {
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200 char** argv_ = cast(char**)alloca((char*).sizeof * (1 + argv.length));
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201
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202 toAStringz(argv, argv_);
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203
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204 return std.c.process.execvp(toStringz(pathname), argv_);
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205 }
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206
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207 /** ditto */
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208 int execvpe(char[] pathname, char[][] argv, char[][] envp)
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209 {
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210 version (GNU_Need_execvpe)
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211 {
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212 // Is pathname rooted?
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213 if(pathname[0] == '/')
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214 {
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215 // Yes, so just call execve()
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216 return execve(pathname, argv, envp);
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217 }
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218 else
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219 {
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220 // No, so must traverse PATHs, looking for first match
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221 char[][] envPaths = std.string.split(std.string.toString(std.c.stdlib.getenv("PATH")), ":");
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222 int iRet = 0;
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223
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224 // Note: if any call to execve() succeeds, this process will cease
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225 // execution, so there's no need to check the execve() result through
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226 // the loop.
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227
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228 foreach(char[] pathDir; envPaths)
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229 {
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230 char[] composite = pathDir ~ "/" ~ pathname;
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diff changeset
231
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232 iRet = execve(composite, argv, envp);
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233 }
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diff changeset
234 if(0 != iRet)
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235 {
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236 iRet = execve(pathname, argv, envp);
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237 }
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238
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239 return iRet;
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240 }
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241 }
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242 else version(Windows)
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243 {
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244 char** argv_ = cast(char**)alloca((char*).sizeof * (1 + argv.length));
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245 char** envp_ = cast(char**)alloca((char*).sizeof * (1 + envp.length));
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246
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247 toAStringz(argv, argv_);
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248 toAStringz(envp, envp_);
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249
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250 return std.c.process.execvpe(toStringz(pathname), argv_, envp_);
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251 }
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diff changeset
252 else
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253 {
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254 throw new Exception("Not supported on this platform.");
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255 } // version
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256 }
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257
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258 /* ////////////////////////////////////////////////////////////////////////// */
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259
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diff changeset
260 version(MainTest)
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261 {
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262 int main(char[][] args)
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263 {
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264 if(args.length < 2)
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265 {
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266 printf("Must supply executable (and optional arguments)\n");
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267
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268 return 1;
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269 }
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270 else
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diff changeset
271 {
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272 char[][] dummy_env;
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273
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274 dummy_env ~= "VAL0=value";
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275 dummy_env ~= "VAL1=value";
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276
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277 /+
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278 foreach(char[] arg; args)
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279 {
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280 printf("%.*s\n", arg);
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281 }
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282 +/
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283
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284 // int i = execv(args[1], args[1 .. args.length]);
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285 // int i = execvp(args[1], args[1 .. args.length]);
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286 int i = execvpe(args[1], args[1 .. args.length], dummy_env);
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287
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288 printf("exec??() has returned! Error code: %d; errno: %d\n", i, /* std.c.stdlib.getErrno() */-1);
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289
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290 return 0;
373489eeaf90 Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
291 }
373489eeaf90 Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
292 }
373489eeaf90 Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
293 }
373489eeaf90 Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
294
373489eeaf90 Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
295 /* ////////////////////////////////////////////////////////////////////////// */