1 | /* gspawn-win32.c - Process launching on Win32 |
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2 | * |
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3 | * Copyright 2000 Red Hat, Inc. |
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4 | * Copyright 2003 Tor Lillqvist |
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5 | * |
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6 | * GLib is free software; you can redistribute it and/or |
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7 | * modify it under the terms of the GNU Lesser General Public License as |
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8 | * published by the Free Software Foundation; either version 2 of the |
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9 | * License, or (at your option) any later version. |
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10 | * |
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11 | * GLib is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | * Lesser General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU Lesser General Public |
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17 | * License along with GLib; see the file COPYING.LIB. If not, write |
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18 | * to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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19 | * Boston, MA 02111-1307, USA. |
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20 | */ |
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21 | |
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22 | /* |
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23 | * Implementation details on Win32. |
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24 | * |
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25 | * - There is no way to set the no-inherit flag for |
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26 | * a "file descriptor" in the MS C runtime. The flag is there, |
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27 | * and the dospawn() function uses it, but unfortunately |
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28 | * this flag can only be set when opening the file. |
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29 | * - As there is no fork(), we cannot reliably change directory |
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30 | * before starting the child process. (There might be several threads |
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31 | * running, and the current directory is common for all threads.) |
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32 | * |
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33 | * Thus, we must in most cases use a helper program to handle closing |
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34 | * of (inherited) file descriptors and changing of directory. The |
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35 | * helper process is also needed if the standard input, standard |
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36 | * output, or standard error of the process to be run are supposed to |
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37 | * be redirected somewhere. |
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38 | * |
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39 | * The structure of the source code in this file is a mess, I know. |
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40 | */ |
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41 | |
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42 | /* Define this to get some logging all the time */ |
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43 | /* #define G_SPAWN_WIN32_DEBUG */ |
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44 | |
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45 | #include <config.h> |
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46 | |
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47 | #include "glib.h" |
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48 | #include "gprintfint.h" |
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49 | |
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50 | #include <string.h> |
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51 | #include <stdlib.h> |
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52 | #include <stdio.h> |
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53 | |
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54 | #include <windows.h> |
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55 | #include <errno.h> |
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56 | #include <fcntl.h> |
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57 | #include <io.h> |
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58 | #include <process.h> |
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59 | #include <direct.h> |
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60 | |
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61 | #include "glibintl.h" |
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62 | |
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63 | #ifdef G_SPAWN_WIN32_DEBUG |
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64 | static int debug = 1; |
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65 | #define SETUP_DEBUG() /* empty */ |
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66 | |
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67 | #else |
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68 | static int debug = -1; |
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69 | #define SETUP_DEBUG() \ |
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70 | G_STMT_START \ |
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71 | { \ |
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72 | if (debug == -1) \ |
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73 | { \ |
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74 | if (getenv ("G_SPAWN_WIN32_DEBUG") != NULL) \ |
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75 | debug = 1; \ |
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76 | else \ |
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77 | debug = 0; \ |
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78 | } \ |
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79 | } \ |
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80 | G_STMT_END |
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81 | #endif |
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82 | |
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83 | enum |
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84 | { |
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85 | CHILD_NO_ERROR, |
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86 | CHILD_CHDIR_FAILED, |
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87 | CHILD_SPAWN_FAILED, |
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88 | }; |
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89 | |
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90 | enum { |
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91 | ARG_CHILD_ERR_REPORT = 1, |
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92 | ARG_STDIN, |
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93 | ARG_STDOUT, |
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94 | ARG_STDERR, |
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95 | ARG_WORKING_DIRECTORY, |
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96 | ARG_CLOSE_DESCRIPTORS, |
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97 | ARG_USE_PATH, |
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98 | ARG_WAIT, |
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99 | ARG_PROGRAM, |
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100 | ARG_COUNT = ARG_PROGRAM |
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101 | }; |
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102 | |
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103 | /* Return codes from do_spawn() */ |
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104 | #define DO_SPAWN_ERROR_HELPER -1 |
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105 | #define DO_SPAWN_OK_NO_HELPER -2 |
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106 | #define DO_SPAWN_ERROR_NO_HELPER -3 |
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107 | |
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108 | static gint |
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109 | protect_argv (gchar **argv, |
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110 | gchar ***new_argv) |
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111 | { |
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112 | gint i; |
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113 | gint argc = 0; |
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114 | |
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115 | while (argv[argc]) |
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116 | ++argc; |
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117 | *new_argv = g_new (gchar *, argc+1); |
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118 | |
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119 | /* Quote each argv element if necessary, so that it will get |
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120 | * reconstructed correctly in the C runtime startup code. Note that |
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121 | * the unquoting algorithm in the C runtime is really weird, and |
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122 | * rather different than what Unix shells do. See stdargv.c in the C |
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123 | * runtime sources (in the Platform SDK, in src/crt). |
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124 | * |
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125 | * Note that an new_argv[0] constructed by this function should |
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126 | * *not* be passed as the filename argument to a spawn* or exec* |
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127 | * family function. That argument should be the real file name |
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128 | * without any quoting. |
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129 | */ |
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130 | for (i = 0; i < argc; i++) |
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131 | { |
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132 | gchar *p = argv[i]; |
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133 | gchar *q; |
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134 | gint len = 0; |
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135 | gboolean need_dblquotes = FALSE; |
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136 | while (*p) |
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137 | { |
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138 | if (*p == ' ' || *p == '\t') |
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139 | need_dblquotes = TRUE; |
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140 | else if (*p == '"') |
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141 | len++; |
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142 | else if (*p == '\\') |
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143 | { |
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144 | gchar *pp = p; |
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145 | while (*pp && *pp == '\\') |
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146 | pp++; |
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147 | if (*pp == '"') |
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148 | len++; |
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149 | } |
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150 | len++; |
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151 | p++; |
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152 | } |
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153 | |
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154 | q = (*new_argv)[i] = g_malloc (len + need_dblquotes*2 + 1); |
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155 | p = argv[i]; |
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156 | |
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157 | if (need_dblquotes) |
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158 | *q++ = '"'; |
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159 | |
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160 | while (*p) |
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161 | { |
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162 | if (*p == '"') |
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163 | *q++ = '\\'; |
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164 | else if (*p == '\\') |
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165 | { |
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166 | gchar *pp = p; |
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167 | while (*pp && *pp == '\\') |
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168 | pp++; |
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169 | if (*pp == '"') |
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170 | *q++ = '\\'; |
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171 | } |
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172 | *q++ = *p; |
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173 | p++; |
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174 | } |
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175 | |
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176 | if (need_dblquotes) |
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177 | *q++ = '"'; |
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178 | *q++ = '\0'; |
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179 | /* printf ("argv[%d]:%s, need_dblquotes:%s len:%d => %s\n", i, argv[i], need_dblquotes?"TRUE":"FALSE", len, (*new_argv)[i]); */ |
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180 | } |
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181 | (*new_argv)[argc] = NULL; |
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182 | |
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183 | return argc; |
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184 | } |
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185 | |
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186 | #ifndef GSPAWN_HELPER |
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187 | |
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188 | static gboolean make_pipe (gint p[2], |
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189 | GError **error); |
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190 | static gboolean do_spawn_with_pipes (gboolean dont_wait, |
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191 | gboolean dont_return_handle, |
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192 | const gchar *working_directory, |
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193 | gchar **argv, |
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194 | gchar **envp, |
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195 | gboolean close_descriptors, |
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196 | gboolean search_path, |
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197 | gboolean stdout_to_null, |
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198 | gboolean stderr_to_null, |
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199 | gboolean child_inherits_stdin, |
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200 | gboolean file_and_argv_zero, |
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201 | GSpawnChildSetupFunc child_setup, |
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202 | gpointer user_data, |
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203 | GPid *child_handle, |
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204 | gint *standard_input, |
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205 | gint *standard_output, |
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206 | gint *standard_error, |
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207 | gint *exit_status, |
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208 | GError **error); |
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209 | |
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210 | GQuark |
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211 | g_spawn_error_quark (void) |
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212 | { |
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213 | static GQuark quark = 0; |
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214 | if (quark == 0) |
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215 | quark = g_quark_from_static_string ("g-exec-error-quark"); |
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216 | return quark; |
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217 | } |
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218 | |
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219 | gboolean |
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220 | g_spawn_async (const gchar *working_directory, |
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221 | gchar **argv, |
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222 | gchar **envp, |
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223 | GSpawnFlags flags, |
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224 | GSpawnChildSetupFunc child_setup, |
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225 | gpointer user_data, |
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226 | GPid *child_handle, |
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227 | GError **error) |
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228 | { |
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229 | g_return_val_if_fail (argv != NULL, FALSE); |
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230 | |
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231 | return g_spawn_async_with_pipes (working_directory, |
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232 | argv, envp, |
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233 | flags, |
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234 | child_setup, |
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235 | user_data, |
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236 | child_handle, |
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237 | NULL, NULL, NULL, |
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238 | error); |
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239 | } |
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240 | |
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241 | /* Avoids a danger in threaded situations (calling close() |
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242 | * on a file descriptor twice, and another thread has |
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243 | * re-opened it since the first close) |
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244 | */ |
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245 | static gint |
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246 | close_and_invalidate (gint *fd) |
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247 | { |
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248 | gint ret; |
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249 | |
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250 | if (*fd < 0) |
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251 | return -1; |
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252 | else |
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253 | { |
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254 | ret = close (*fd); |
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255 | *fd = -1; |
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256 | } |
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257 | |
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258 | return ret; |
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259 | } |
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260 | |
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261 | typedef enum |
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262 | { |
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263 | READ_FAILED = 0, /* FALSE */ |
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264 | READ_OK, |
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265 | READ_EOF |
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266 | } ReadResult; |
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267 | |
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268 | static ReadResult |
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269 | read_data (GString *str, |
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270 | GIOChannel *iochannel, |
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271 | GError **error) |
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272 | { |
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273 | GIOStatus giostatus; |
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274 | gssize bytes; |
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275 | gchar buf[4096]; |
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276 | |
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277 | again: |
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278 | |
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279 | giostatus = g_io_channel_read_chars (iochannel, buf, sizeof (buf), &bytes, NULL); |
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280 | |
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281 | if (bytes == 0) |
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282 | return READ_EOF; |
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283 | else if (bytes > 0) |
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284 | { |
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285 | g_string_append_len (str, buf, bytes); |
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286 | return READ_OK; |
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287 | } |
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288 | else if (giostatus == G_IO_STATUS_AGAIN) |
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289 | goto again; |
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290 | else if (giostatus == G_IO_STATUS_ERROR) |
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291 | { |
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292 | g_set_error (error, |
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293 | G_SPAWN_ERROR, |
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294 | G_SPAWN_ERROR_READ, |
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295 | _("Failed to read data from child process")); |
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296 | |
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297 | return READ_FAILED; |
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298 | } |
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299 | else |
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300 | return READ_OK; |
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301 | } |
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302 | |
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303 | gboolean |
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304 | g_spawn_sync (const gchar *working_directory, |
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305 | gchar **argv, |
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306 | gchar **envp, |
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307 | GSpawnFlags flags, |
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308 | GSpawnChildSetupFunc child_setup, |
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309 | gpointer user_data, |
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310 | gchar **standard_output, |
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311 | gchar **standard_error, |
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312 | gint *exit_status, |
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313 | GError **error) |
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314 | { |
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315 | gint outpipe = -1; |
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316 | gint errpipe = -1; |
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317 | GPid pid; |
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318 | GIOChannel *outchannel = NULL; |
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319 | GIOChannel *errchannel = NULL; |
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320 | GPollFD outfd, errfd; |
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321 | GPollFD fds[2]; |
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322 | gint nfds; |
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323 | gint outindex = -1; |
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324 | gint errindex = -1; |
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325 | gint ret; |
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326 | GString *outstr = NULL; |
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327 | GString *errstr = NULL; |
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328 | gboolean failed; |
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329 | gint status; |
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330 | |
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331 | g_return_val_if_fail (argv != NULL, FALSE); |
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332 | g_return_val_if_fail (!(flags & G_SPAWN_DO_NOT_REAP_CHILD), FALSE); |
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333 | g_return_val_if_fail (standard_output == NULL || |
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334 | !(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE); |
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335 | g_return_val_if_fail (standard_error == NULL || |
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336 | !(flags & G_SPAWN_STDERR_TO_DEV_NULL), FALSE); |
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337 | |
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338 | /* Just to ensure segfaults if callers try to use |
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339 | * these when an error is reported. |
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340 | */ |
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341 | if (standard_output) |
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342 | *standard_output = NULL; |
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343 | |
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344 | if (standard_error) |
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345 | *standard_error = NULL; |
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346 | |
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347 | if (!do_spawn_with_pipes (FALSE, |
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348 | TRUE, |
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349 | working_directory, |
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350 | argv, |
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351 | envp, |
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352 | !(flags & G_SPAWN_LEAVE_DESCRIPTORS_OPEN), |
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353 | (flags & G_SPAWN_SEARCH_PATH) != 0, |
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354 | (flags & G_SPAWN_STDOUT_TO_DEV_NULL) != 0, |
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355 | (flags & G_SPAWN_STDERR_TO_DEV_NULL) != 0, |
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356 | (flags & G_SPAWN_CHILD_INHERITS_STDIN) != 0, |
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357 | (flags & G_SPAWN_FILE_AND_ARGV_ZERO) != 0, |
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358 | child_setup, |
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359 | user_data, |
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360 | &pid, |
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361 | NULL, |
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362 | standard_output ? &outpipe : NULL, |
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363 | standard_error ? &errpipe : NULL, |
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364 | &status, |
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365 | error)) |
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366 | return FALSE; |
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367 | |
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368 | /* Read data from child. */ |
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369 | |
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370 | failed = FALSE; |
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371 | |
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372 | if (outpipe >= 0) |
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373 | { |
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374 | outstr = g_string_new (NULL); |
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375 | outchannel = g_io_channel_win32_new_fd (outpipe); |
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376 | g_io_channel_set_encoding (outchannel, NULL, NULL); |
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377 | g_io_channel_win32_make_pollfd (outchannel, |
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378 | G_IO_IN | G_IO_ERR | G_IO_HUP, |
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379 | &outfd); |
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380 | } |
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381 | |
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382 | if (errpipe >= 0) |
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383 | { |
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384 | errstr = g_string_new (NULL); |
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385 | errchannel = g_io_channel_win32_new_fd (errpipe); |
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386 | g_io_channel_set_encoding (errchannel, NULL, NULL); |
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387 | g_io_channel_win32_make_pollfd (errchannel, |
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388 | G_IO_IN | G_IO_ERR | G_IO_HUP, |
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389 | &errfd); |
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390 | } |
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391 | |
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392 | /* Read data until we get EOF on both pipes. */ |
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393 | while (!failed && |
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394 | (outpipe >= 0 || |
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395 | errpipe >= 0)) |
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396 | { |
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397 | nfds = 0; |
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398 | if (outpipe >= 0) |
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399 | { |
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400 | fds[nfds] = outfd; |
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401 | outindex = nfds; |
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402 | nfds++; |
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403 | } |
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404 | if (errpipe >= 0) |
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405 | { |
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406 | fds[nfds] = errfd; |
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407 | errindex = nfds; |
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408 | nfds++; |
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409 | } |
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410 | |
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411 | if (debug) |
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412 | g_print ("%s:g_spawn_sync: calling g_io_channel_win32_poll, nfds=%d\n", |
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413 | __FILE__, nfds); |
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414 | |
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415 | ret = g_io_channel_win32_poll (fds, nfds, -1); |
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416 | |
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417 | if (ret < 0) |
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418 | { |
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419 | failed = TRUE; |
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420 | |
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421 | g_set_error (error, |
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422 | G_SPAWN_ERROR, |
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423 | G_SPAWN_ERROR_READ, |
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424 | _("Unexpected error in g_io_channel_win32_poll() reading data from a child process")); |
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425 | |
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426 | break; |
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427 | } |
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428 | |
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429 | if (outpipe >= 0 && (fds[outindex].revents & G_IO_IN)) |
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430 | { |
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431 | switch (read_data (outstr, outchannel, error)) |
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432 | { |
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433 | case READ_FAILED: |
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434 | if (debug) |
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435 | g_print ("g_spawn_sync: outchannel: READ_FAILED\n"); |
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436 | failed = TRUE; |
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437 | break; |
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438 | case READ_EOF: |
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439 | if (debug) |
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440 | g_print ("g_spawn_sync: outchannel: READ_EOF\n"); |
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441 | g_io_channel_unref (outchannel); |
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442 | outchannel = NULL; |
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443 | close_and_invalidate (&outpipe); |
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444 | break; |
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445 | default: |
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446 | if (debug) |
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447 | g_print ("g_spawn_sync: outchannel: OK\n"); |
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448 | break; |
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449 | } |
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450 | |
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451 | if (failed) |
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452 | break; |
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453 | } |
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454 | |
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455 | if (errpipe >= 0 && (fds[errindex].revents & G_IO_IN)) |
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456 | { |
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457 | switch (read_data (errstr, errchannel, error)) |
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458 | { |
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459 | case READ_FAILED: |
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460 | if (debug) |
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461 | g_print ("g_spawn_sync: errchannel: READ_FAILED\n"); |
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462 | failed = TRUE; |
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463 | break; |
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464 | case READ_EOF: |
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465 | if (debug) |
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466 | g_print ("g_spawn_sync: errchannel: READ_EOF\n"); |
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467 | g_io_channel_unref (errchannel); |
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468 | errchannel = NULL; |
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469 | close_and_invalidate (&errpipe); |
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470 | break; |
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471 | default: |
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472 | if (debug) |
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473 | g_print ("g_spawn_sync: errchannel: OK\n"); |
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474 | break; |
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475 | } |
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476 | |
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477 | if (failed) |
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478 | break; |
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479 | } |
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480 | } |
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481 | |
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482 | /* These should only be open still if we had an error. */ |
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483 | |
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484 | if (outchannel != NULL) |
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485 | g_io_channel_unref (outchannel); |
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486 | if (errchannel != NULL) |
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487 | g_io_channel_unref (errchannel); |
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488 | if (outpipe >= 0) |
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489 | close_and_invalidate (&outpipe); |
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490 | if (errpipe >= 0) |
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491 | close_and_invalidate (&errpipe); |
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492 | |
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493 | g_spawn_close_pid(pid); |
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494 | |
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495 | if (failed) |
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496 | { |
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497 | if (outstr) |
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498 | g_string_free (outstr, TRUE); |
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499 | if (errstr) |
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500 | g_string_free (errstr, TRUE); |
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501 | |
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502 | return FALSE; |
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503 | } |
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504 | else |
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505 | { |
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506 | if (exit_status) |
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507 | *exit_status = status; |
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508 | |
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509 | if (standard_output) |
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510 | *standard_output = g_string_free (outstr, FALSE); |
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511 | |
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512 | if (standard_error) |
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513 | *standard_error = g_string_free (errstr, FALSE); |
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514 | |
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515 | return TRUE; |
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516 | } |
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517 | } |
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518 | |
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519 | gboolean |
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520 | g_spawn_async_with_pipes (const gchar *working_directory, |
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521 | gchar **argv, |
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522 | gchar **envp, |
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523 | GSpawnFlags flags, |
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524 | GSpawnChildSetupFunc child_setup, |
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525 | gpointer user_data, |
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526 | GPid *child_handle, |
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527 | gint *standard_input, |
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528 | gint *standard_output, |
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529 | gint *standard_error, |
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530 | GError **error) |
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531 | { |
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532 | g_return_val_if_fail (argv != NULL, FALSE); |
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533 | g_return_val_if_fail (standard_output == NULL || |
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534 | !(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE); |
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535 | g_return_val_if_fail (standard_error == NULL || |
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536 | !(flags & G_SPAWN_STDERR_TO_DEV_NULL), FALSE); |
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537 | /* can't inherit stdin if we have an input pipe. */ |
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538 | g_return_val_if_fail (standard_input == NULL || |
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539 | !(flags & G_SPAWN_CHILD_INHERITS_STDIN), FALSE); |
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540 | |
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541 | return do_spawn_with_pipes (TRUE, |
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542 | !(flags & G_SPAWN_DO_NOT_REAP_CHILD), |
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543 | working_directory, |
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544 | argv, |
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545 | envp, |
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546 | !(flags & G_SPAWN_LEAVE_DESCRIPTORS_OPEN), |
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547 | (flags & G_SPAWN_SEARCH_PATH) != 0, |
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548 | (flags & G_SPAWN_STDOUT_TO_DEV_NULL) != 0, |
---|
549 | (flags & G_SPAWN_STDERR_TO_DEV_NULL) != 0, |
---|
550 | (flags & G_SPAWN_CHILD_INHERITS_STDIN) != 0, |
---|
551 | (flags & G_SPAWN_FILE_AND_ARGV_ZERO) != 0, |
---|
552 | child_setup, |
---|
553 | user_data, |
---|
554 | child_handle, |
---|
555 | standard_input, |
---|
556 | standard_output, |
---|
557 | standard_error, |
---|
558 | NULL, |
---|
559 | error); |
---|
560 | } |
---|
561 | |
---|
562 | gboolean |
---|
563 | g_spawn_command_line_sync (const gchar *command_line, |
---|
564 | gchar **standard_output, |
---|
565 | gchar **standard_error, |
---|
566 | gint *exit_status, |
---|
567 | GError **error) |
---|
568 | { |
---|
569 | gboolean retval; |
---|
570 | gchar **argv = 0; |
---|
571 | |
---|
572 | g_return_val_if_fail (command_line != NULL, FALSE); |
---|
573 | |
---|
574 | if (!g_shell_parse_argv (command_line, |
---|
575 | NULL, &argv, |
---|
576 | error)) |
---|
577 | return FALSE; |
---|
578 | |
---|
579 | retval = g_spawn_sync (NULL, |
---|
580 | argv, |
---|
581 | NULL, |
---|
582 | G_SPAWN_SEARCH_PATH, |
---|
583 | NULL, |
---|
584 | NULL, |
---|
585 | standard_output, |
---|
586 | standard_error, |
---|
587 | exit_status, |
---|
588 | error); |
---|
589 | g_strfreev (argv); |
---|
590 | |
---|
591 | return retval; |
---|
592 | } |
---|
593 | |
---|
594 | gboolean |
---|
595 | g_spawn_command_line_async (const gchar *command_line, |
---|
596 | GError **error) |
---|
597 | { |
---|
598 | gboolean retval; |
---|
599 | gchar **argv = 0; |
---|
600 | |
---|
601 | g_return_val_if_fail (command_line != NULL, FALSE); |
---|
602 | |
---|
603 | if (!g_shell_parse_argv (command_line, |
---|
604 | NULL, &argv, |
---|
605 | error)) |
---|
606 | return FALSE; |
---|
607 | |
---|
608 | retval = g_spawn_async (NULL, |
---|
609 | argv, |
---|
610 | NULL, |
---|
611 | G_SPAWN_SEARCH_PATH, |
---|
612 | NULL, |
---|
613 | NULL, |
---|
614 | NULL, |
---|
615 | error); |
---|
616 | g_strfreev (argv); |
---|
617 | |
---|
618 | return retval; |
---|
619 | } |
---|
620 | |
---|
621 | /* This stinks, code reorg needed. Presumably do_spawn() should be |
---|
622 | * inserted into its only caller, do_spawn_with_pipes(), and then code |
---|
623 | * snippets from that function should be split out to separate |
---|
624 | * functions if necessary. |
---|
625 | */ |
---|
626 | |
---|
627 | static gint shortcut_spawn_retval; |
---|
628 | |
---|
629 | static gint |
---|
630 | do_spawn (gboolean dont_wait, |
---|
631 | gint child_err_report_fd, |
---|
632 | gint stdin_fd, |
---|
633 | gint stdout_fd, |
---|
634 | gint stderr_fd, |
---|
635 | const gchar *working_directory, |
---|
636 | gchar **argv, |
---|
637 | gchar **envp, |
---|
638 | gboolean close_descriptors, |
---|
639 | gboolean search_path, |
---|
640 | gboolean stdout_to_null, |
---|
641 | gboolean stderr_to_null, |
---|
642 | gboolean child_inherits_stdin, |
---|
643 | gboolean file_and_argv_zero, |
---|
644 | GSpawnChildSetupFunc child_setup, |
---|
645 | gpointer user_data) |
---|
646 | { |
---|
647 | gchar **protected_argv; |
---|
648 | gchar **new_argv; |
---|
649 | gchar args[ARG_COUNT][10]; |
---|
650 | gint i; |
---|
651 | int rc; |
---|
652 | int argc; |
---|
653 | |
---|
654 | SETUP_DEBUG(); |
---|
655 | |
---|
656 | argc = protect_argv (argv, &protected_argv); |
---|
657 | |
---|
658 | if (stdin_fd == -1 && stdout_fd == -1 && stderr_fd == -1 && |
---|
659 | (working_directory == NULL || !*working_directory) && |
---|
660 | !close_descriptors && |
---|
661 | !stdout_to_null && !stderr_to_null && |
---|
662 | child_inherits_stdin) |
---|
663 | { |
---|
664 | /* We can do without the helper process */ |
---|
665 | int mode = dont_wait ? P_NOWAIT : P_WAIT; |
---|
666 | |
---|
667 | if (debug) |
---|
668 | g_print ("doing without gspawn-win32-helper\n"); |
---|
669 | |
---|
670 | if (search_path) |
---|
671 | rc = spawnvp (mode, argv[0], file_and_argv_zero ? protected_argv + 1 : protected_argv); |
---|
672 | else |
---|
673 | rc = spawnv (mode, argv[0], file_and_argv_zero ? protected_argv + 1 : protected_argv); |
---|
674 | |
---|
675 | for (i = 0; i < argc; i++) |
---|
676 | g_free (protected_argv[i]); |
---|
677 | g_free (protected_argv); |
---|
678 | |
---|
679 | if (rc == -1) |
---|
680 | { |
---|
681 | return DO_SPAWN_ERROR_NO_HELPER; |
---|
682 | } |
---|
683 | else |
---|
684 | { |
---|
685 | shortcut_spawn_retval = rc; |
---|
686 | return DO_SPAWN_OK_NO_HELPER; |
---|
687 | } |
---|
688 | } |
---|
689 | |
---|
690 | new_argv = g_new (gchar *, argc + 1 + ARG_COUNT); |
---|
691 | |
---|
692 | new_argv[0] = "gspawn-win32-helper"; |
---|
693 | _g_sprintf (args[ARG_CHILD_ERR_REPORT], "%d", child_err_report_fd); |
---|
694 | new_argv[ARG_CHILD_ERR_REPORT] = args[ARG_CHILD_ERR_REPORT]; |
---|
695 | |
---|
696 | if (file_and_argv_zero) |
---|
697 | { |
---|
698 | /* Overload ARG_CHILD_ERR_REPORT to also encode the |
---|
699 | * G_SPAWN_FILE_AND_ARGV_ZERO functionality. |
---|
700 | */ |
---|
701 | strcat (args[ARG_CHILD_ERR_REPORT], "#"); |
---|
702 | } |
---|
703 | |
---|
704 | if (stdin_fd >= 0) |
---|
705 | { |
---|
706 | _g_sprintf (args[ARG_STDIN], "%d", stdin_fd); |
---|
707 | new_argv[ARG_STDIN] = args[ARG_STDIN]; |
---|
708 | } |
---|
709 | else if (child_inherits_stdin) |
---|
710 | { |
---|
711 | /* Let stdin be alone */ |
---|
712 | new_argv[ARG_STDIN] = "-"; |
---|
713 | } |
---|
714 | else |
---|
715 | { |
---|
716 | /* Keep process from blocking on a read of stdin */ |
---|
717 | new_argv[ARG_STDIN] = "z"; |
---|
718 | } |
---|
719 | |
---|
720 | if (stdout_fd >= 0) |
---|
721 | { |
---|
722 | _g_sprintf (args[ARG_STDOUT], "%d", stdout_fd); |
---|
723 | new_argv[ARG_STDOUT] = args[ARG_STDOUT]; |
---|
724 | } |
---|
725 | else if (stdout_to_null) |
---|
726 | { |
---|
727 | new_argv[ARG_STDOUT] = "z"; |
---|
728 | } |
---|
729 | else |
---|
730 | { |
---|
731 | new_argv[ARG_STDOUT] = "-"; |
---|
732 | } |
---|
733 | |
---|
734 | if (stderr_fd >= 0) |
---|
735 | { |
---|
736 | _g_sprintf (args[ARG_STDERR], "%d", stderr_fd); |
---|
737 | new_argv[ARG_STDERR] = args[ARG_STDERR]; |
---|
738 | } |
---|
739 | else if (stderr_to_null) |
---|
740 | { |
---|
741 | new_argv[ARG_STDERR] = "z"; |
---|
742 | } |
---|
743 | else |
---|
744 | { |
---|
745 | new_argv[ARG_STDERR] = "-"; |
---|
746 | } |
---|
747 | |
---|
748 | if (working_directory && *working_directory) |
---|
749 | /* The g_strdup() to lose the constness */ |
---|
750 | new_argv[ARG_WORKING_DIRECTORY] = g_strdup (working_directory); |
---|
751 | else |
---|
752 | new_argv[ARG_WORKING_DIRECTORY] = g_strdup ("-"); |
---|
753 | |
---|
754 | if (close_descriptors) |
---|
755 | new_argv[ARG_CLOSE_DESCRIPTORS] = "y"; |
---|
756 | else |
---|
757 | new_argv[ARG_CLOSE_DESCRIPTORS] = "-"; |
---|
758 | |
---|
759 | if (search_path) |
---|
760 | new_argv[ARG_USE_PATH] = "y"; |
---|
761 | else |
---|
762 | new_argv[ARG_USE_PATH] = "-"; |
---|
763 | |
---|
764 | if (dont_wait) |
---|
765 | new_argv[ARG_WAIT] = "-"; |
---|
766 | else |
---|
767 | new_argv[ARG_WAIT] = "w"; |
---|
768 | |
---|
769 | for (i = 0; i <= argc; i++) |
---|
770 | new_argv[ARG_PROGRAM + i] = protected_argv[i]; |
---|
771 | |
---|
772 | /* Call user function just before we execute the helper program, |
---|
773 | * which executes the program. Dunno what's the usefulness of this. |
---|
774 | * A child setup function used on Unix probably isn't of much use |
---|
775 | * as such on Win32, anyhow |
---|
776 | */ |
---|
777 | if (child_setup) |
---|
778 | { |
---|
779 | (* child_setup) (user_data); |
---|
780 | } |
---|
781 | |
---|
782 | if (debug) |
---|
783 | { |
---|
784 | g_print ("calling gspawn-win32-helper with argv:\n"); |
---|
785 | for (i = 0; i < argc + 1 + ARG_COUNT; i++) |
---|
786 | g_print ("argv[%d]: %s\n", i, (new_argv[i] ? new_argv[i] : "NULL")); |
---|
787 | } |
---|
788 | |
---|
789 | if (envp != NULL) |
---|
790 | /* Let's hope envp hasn't mucked with PATH so that |
---|
791 | * gspawn-win32-helper.exe isn't found. |
---|
792 | */ |
---|
793 | rc = spawnvpe (P_NOWAIT, "gspawn-win32-helper", new_argv, envp); |
---|
794 | else |
---|
795 | rc = spawnvp (P_NOWAIT, "gspawn-win32-helper", new_argv); |
---|
796 | |
---|
797 | /* Close the child_err_report_fd and the other process's ends of the |
---|
798 | * pipes in this process, otherwise the reader will never get |
---|
799 | * EOF. |
---|
800 | */ |
---|
801 | close (child_err_report_fd); |
---|
802 | if (stdin_fd >= 0) |
---|
803 | close (stdin_fd); |
---|
804 | if (stdout_fd >= 0) |
---|
805 | close (stdout_fd); |
---|
806 | if (stderr_fd >= 0) |
---|
807 | close (stderr_fd); |
---|
808 | |
---|
809 | for (i = 0; i < argc; i++) |
---|
810 | g_free (protected_argv[i]); |
---|
811 | g_free (protected_argv); |
---|
812 | |
---|
813 | g_free (new_argv[ARG_WORKING_DIRECTORY]); |
---|
814 | g_free (new_argv); |
---|
815 | |
---|
816 | return rc; |
---|
817 | } |
---|
818 | |
---|
819 | static gboolean |
---|
820 | read_ints (int fd, |
---|
821 | gint* buf, |
---|
822 | gint n_ints_in_buf, |
---|
823 | gint *n_ints_read, |
---|
824 | GError **error) |
---|
825 | { |
---|
826 | gint bytes = 0; |
---|
827 | |
---|
828 | while (bytes < sizeof(gint)*n_ints_in_buf) |
---|
829 | { |
---|
830 | gint chunk; |
---|
831 | |
---|
832 | if (debug) |
---|
833 | g_print ("%s:read_ints: trying to read %d bytes from pipe...\n", |
---|
834 | __FILE__, |
---|
835 | sizeof(gint)*n_ints_in_buf - bytes); |
---|
836 | |
---|
837 | chunk = read (fd, ((gchar*)buf) + bytes, |
---|
838 | sizeof(gint)*n_ints_in_buf - bytes); |
---|
839 | |
---|
840 | if (debug) |
---|
841 | g_print ("... got %d bytes\n", chunk); |
---|
842 | |
---|
843 | if (chunk < 0) |
---|
844 | { |
---|
845 | /* Some weird shit happened, bail out */ |
---|
846 | |
---|
847 | g_set_error (error, |
---|
848 | G_SPAWN_ERROR, |
---|
849 | G_SPAWN_ERROR_FAILED, |
---|
850 | _("Failed to read from child pipe (%s)"), |
---|
851 | g_strerror (errno)); |
---|
852 | |
---|
853 | return FALSE; |
---|
854 | } |
---|
855 | else if (chunk == 0) |
---|
856 | break; /* EOF */ |
---|
857 | else |
---|
858 | bytes += chunk; |
---|
859 | } |
---|
860 | |
---|
861 | *n_ints_read = bytes/sizeof(gint); |
---|
862 | |
---|
863 | return TRUE; |
---|
864 | } |
---|
865 | |
---|
866 | static gboolean |
---|
867 | do_spawn_with_pipes (gboolean dont_wait, |
---|
868 | gboolean dont_return_handle, |
---|
869 | const gchar *working_directory, |
---|
870 | gchar **argv, |
---|
871 | gchar **envp, |
---|
872 | gboolean close_descriptors, |
---|
873 | gboolean search_path, |
---|
874 | gboolean stdout_to_null, |
---|
875 | gboolean stderr_to_null, |
---|
876 | gboolean child_inherits_stdin, |
---|
877 | gboolean file_and_argv_zero, |
---|
878 | GSpawnChildSetupFunc child_setup, |
---|
879 | gpointer user_data, |
---|
880 | GPid *child_handle, |
---|
881 | gint *standard_input, |
---|
882 | gint *standard_output, |
---|
883 | gint *standard_error, |
---|
884 | gint *exit_status, |
---|
885 | GError **error) |
---|
886 | { |
---|
887 | gint stdin_pipe[2] = { -1, -1 }; |
---|
888 | gint stdout_pipe[2] = { -1, -1 }; |
---|
889 | gint stderr_pipe[2] = { -1, -1 }; |
---|
890 | gint child_err_report_pipe[2] = { -1, -1 }; |
---|
891 | gint helper = -1; |
---|
892 | gint buf[2]; |
---|
893 | gint n_ints = 0; |
---|
894 | |
---|
895 | if (!make_pipe (child_err_report_pipe, error)) |
---|
896 | return FALSE; |
---|
897 | |
---|
898 | if (standard_input && !make_pipe (stdin_pipe, error)) |
---|
899 | goto cleanup_and_fail; |
---|
900 | |
---|
901 | if (standard_output && !make_pipe (stdout_pipe, error)) |
---|
902 | goto cleanup_and_fail; |
---|
903 | |
---|
904 | if (standard_error && !make_pipe (stderr_pipe, error)) |
---|
905 | goto cleanup_and_fail; |
---|
906 | |
---|
907 | helper = do_spawn (dont_wait, |
---|
908 | child_err_report_pipe[1], |
---|
909 | stdin_pipe[0], |
---|
910 | stdout_pipe[1], |
---|
911 | stderr_pipe[1], |
---|
912 | working_directory, |
---|
913 | argv, |
---|
914 | envp, |
---|
915 | close_descriptors, |
---|
916 | search_path, |
---|
917 | stdout_to_null, |
---|
918 | stderr_to_null, |
---|
919 | child_inherits_stdin, |
---|
920 | file_and_argv_zero, |
---|
921 | child_setup, |
---|
922 | user_data); |
---|
923 | |
---|
924 | /* Check if gspawn-win32-helper couldn't be run */ |
---|
925 | if (helper == DO_SPAWN_ERROR_HELPER) |
---|
926 | { |
---|
927 | g_set_error (error, |
---|
928 | G_SPAWN_ERROR, |
---|
929 | G_SPAWN_ERROR_FAILED, |
---|
930 | _("Failed to execute helper program")); |
---|
931 | goto cleanup_and_fail; |
---|
932 | } |
---|
933 | |
---|
934 | else if (helper == DO_SPAWN_OK_NO_HELPER) |
---|
935 | { |
---|
936 | if (child_handle && dont_wait && !dont_return_handle) |
---|
937 | *child_handle = (GPid) shortcut_spawn_retval; |
---|
938 | else if (!dont_wait && exit_status) |
---|
939 | *exit_status = shortcut_spawn_retval; |
---|
940 | |
---|
941 | close_and_invalidate (&child_err_report_pipe[0]); |
---|
942 | close_and_invalidate (&child_err_report_pipe[1]); |
---|
943 | |
---|
944 | return TRUE; |
---|
945 | } |
---|
946 | else if (helper == DO_SPAWN_ERROR_NO_HELPER) |
---|
947 | { |
---|
948 | g_set_error (error, |
---|
949 | G_SPAWN_ERROR, |
---|
950 | G_SPAWN_ERROR_FAILED, |
---|
951 | _("Failed to execute child process (%s)"), |
---|
952 | g_strerror (errno)); |
---|
953 | helper = -1; |
---|
954 | goto cleanup_and_fail; |
---|
955 | } |
---|
956 | |
---|
957 | if (!read_ints (child_err_report_pipe[0], |
---|
958 | buf, 2, &n_ints, |
---|
959 | error) || |
---|
960 | n_ints != 2) |
---|
961 | goto cleanup_and_fail; |
---|
962 | |
---|
963 | /* Error code from gspawn-win32-helper. */ |
---|
964 | switch (buf[0]) |
---|
965 | { |
---|
966 | case CHILD_NO_ERROR: |
---|
967 | if (child_handle && dont_wait && !dont_return_handle) |
---|
968 | { |
---|
969 | /* helper is our HANDLE for gspawn-win32-helper. It has |
---|
970 | * told us the HANDLE of its child. Duplicate that into |
---|
971 | * a HANDLE valid in this process. |
---|
972 | */ |
---|
973 | if (!DuplicateHandle ((HANDLE) helper, (HANDLE) buf[1], |
---|
974 | GetCurrentProcess (), (LPHANDLE) child_handle, |
---|
975 | 0, TRUE, DUPLICATE_SAME_ACCESS)) |
---|
976 | *child_handle = 0; |
---|
977 | } |
---|
978 | else if (child_handle) |
---|
979 | *child_handle = 0; |
---|
980 | break; |
---|
981 | |
---|
982 | case CHILD_CHDIR_FAILED: |
---|
983 | g_set_error (error, |
---|
984 | G_SPAWN_ERROR, |
---|
985 | G_SPAWN_ERROR_CHDIR, |
---|
986 | _("Failed to change to directory '%s' (%s)"), |
---|
987 | working_directory, |
---|
988 | g_strerror (buf[1])); |
---|
989 | goto cleanup_and_fail; |
---|
990 | |
---|
991 | case CHILD_SPAWN_FAILED: |
---|
992 | g_set_error (error, |
---|
993 | G_SPAWN_ERROR, |
---|
994 | G_SPAWN_ERROR_FAILED, |
---|
995 | _("Failed to execute child process (%s)"), |
---|
996 | g_strerror (buf[1])); |
---|
997 | goto cleanup_and_fail; |
---|
998 | } |
---|
999 | |
---|
1000 | /* Success against all odds! return the information */ |
---|
1001 | |
---|
1002 | if (standard_input) |
---|
1003 | *standard_input = stdin_pipe[1]; |
---|
1004 | if (standard_output) |
---|
1005 | *standard_output = stdout_pipe[0]; |
---|
1006 | if (standard_error) |
---|
1007 | *standard_error = stderr_pipe[0]; |
---|
1008 | if (exit_status) |
---|
1009 | *exit_status = buf[1]; |
---|
1010 | CloseHandle ((HANDLE) helper); |
---|
1011 | |
---|
1012 | close_and_invalidate (&child_err_report_pipe[0]); |
---|
1013 | |
---|
1014 | return TRUE; |
---|
1015 | |
---|
1016 | cleanup_and_fail: |
---|
1017 | if (helper != -1) |
---|
1018 | CloseHandle ((HANDLE) helper); |
---|
1019 | close_and_invalidate (&child_err_report_pipe[0]); |
---|
1020 | close_and_invalidate (&child_err_report_pipe[1]); |
---|
1021 | close_and_invalidate (&stdin_pipe[0]); |
---|
1022 | close_and_invalidate (&stdin_pipe[1]); |
---|
1023 | close_and_invalidate (&stdout_pipe[0]); |
---|
1024 | close_and_invalidate (&stdout_pipe[1]); |
---|
1025 | close_and_invalidate (&stderr_pipe[0]); |
---|
1026 | close_and_invalidate (&stderr_pipe[1]); |
---|
1027 | |
---|
1028 | return FALSE; |
---|
1029 | } |
---|
1030 | |
---|
1031 | static gboolean |
---|
1032 | make_pipe (gint p[2], |
---|
1033 | GError **error) |
---|
1034 | { |
---|
1035 | if (pipe (p) < 0) |
---|
1036 | { |
---|
1037 | g_set_error (error, |
---|
1038 | G_SPAWN_ERROR, |
---|
1039 | G_SPAWN_ERROR_FAILED, |
---|
1040 | _("Failed to create pipe for communicating with child process (%s)"), |
---|
1041 | g_strerror (errno)); |
---|
1042 | return FALSE; |
---|
1043 | } |
---|
1044 | else |
---|
1045 | return TRUE; |
---|
1046 | } |
---|
1047 | #endif /* !GSPAWN_HELPER */ |
---|
1048 | |
---|
1049 | void |
---|
1050 | g_spawn_close_pid (GPid pid) |
---|
1051 | { |
---|
1052 | CloseHandle (pid); |
---|
1053 | } |
---|