1 | /* |
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2 | * Copyright (c) 2011, Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * Permission to use, copy, modify, and/or distribute this software for any |
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5 | * purpose with or without fee is hereby granted, provided that the above |
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6 | * copyright notice and this permission notice appear in all copies. |
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7 | * |
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8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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15 | */ |
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16 | |
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17 | #include "config.h" |
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18 | |
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19 | #include <ctype.h> |
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20 | #include <errno.h> |
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21 | #include <fcntl.h> |
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22 | #include <stdlib.h> |
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23 | #include <stdio.h> |
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24 | #include <string.h> |
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25 | #include <sys/stat.h> |
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26 | #include <unistd.h> |
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27 | |
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28 | #ifdef HAVE_SYS_WAIT_H |
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29 | #include <sys/wait.h> |
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30 | #endif |
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31 | |
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32 | #ifndef WIFEXITED |
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33 | #define WIFEXITED(S) (((S) & 0xff) == 0) |
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34 | #endif |
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35 | #ifndef WEXITSTATUS |
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36 | #define WEXITSTATUS(S) (((S) & 0xff00) >> 8) |
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37 | #endif |
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38 | #ifndef WIFSIGNALED |
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39 | #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f) |
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40 | #endif |
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41 | #ifndef WTERMSIG |
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42 | #define WTERMSIG(S) ((S) & 0x7f) |
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43 | #endif |
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44 | #ifndef WIFSTOPPED |
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45 | #define WIFSTOPPED WIFEXITED |
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46 | #endif |
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47 | #ifndef WSTOPSIG |
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48 | #define WSTOPSIG WEXITSTATUS |
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49 | #endif |
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50 | |
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51 | #include <iostream> |
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52 | |
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53 | #include "rld.h" |
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54 | #include "rld-process.h" |
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55 | |
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56 | #include <libiberty.h> |
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57 | |
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58 | namespace rld |
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59 | { |
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60 | namespace process |
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61 | { |
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62 | /** |
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63 | * Keep the temporary files if true. Used to help debug a system. |
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64 | */ |
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65 | bool keep_temporary_files = false; |
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66 | |
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67 | /** |
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68 | * The temporary files. |
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69 | */ |
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70 | temporary_files temporaries; |
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71 | |
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72 | temporary_files::temporary_files () |
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73 | { |
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74 | } |
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75 | |
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76 | temporary_files::~temporary_files () |
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77 | { |
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78 | clean_up (); |
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79 | } |
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80 | |
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81 | const std::string |
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82 | temporary_files::get (const std::string& suffix) |
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83 | { |
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84 | char* temp = ::make_temp_file (suffix.c_str ()); |
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85 | |
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86 | if (!temp) |
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87 | throw rld::error ("bad temp name", "temp-file"); |
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88 | |
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89 | std::string name = temp; |
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90 | |
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91 | tempfiles.push_back (name); |
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92 | |
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93 | return name; |
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94 | } |
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95 | |
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96 | void |
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97 | temporary_files::unlink (const std::string& name) |
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98 | { |
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99 | if (!keep_temporary_files) |
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100 | { |
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101 | struct stat sb; |
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102 | if ((::stat (name.c_str (), &sb) >= 0) && S_ISREG (sb.st_mode)) |
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103 | { |
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104 | int r; |
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105 | #if _WIN32 |
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106 | r = ::remove(name.c_str ()); |
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107 | #else |
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108 | r = ::unlink (name.c_str ()); |
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109 | #endif |
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110 | if (r < 0) |
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111 | { |
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112 | std::cerr << "error: unlinking temp file: " << name << std::endl; |
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113 | ::exit (100); |
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114 | } |
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115 | } |
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116 | } |
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117 | } |
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118 | |
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119 | void |
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120 | temporary_files::erase (const std::string& name) |
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121 | { |
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122 | for (tempfile_container::iterator tfi = tempfiles.begin (); |
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123 | tfi != tempfiles.end (); |
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124 | ++tfi) |
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125 | { |
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126 | if (*tfi == name) |
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127 | { |
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128 | unlink (name); |
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129 | tempfiles.erase (tfi); |
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130 | break; |
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131 | } |
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132 | } |
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133 | } |
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134 | |
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135 | void |
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136 | temporary_files::clean_up () |
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137 | { |
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138 | for (tempfile_container::iterator tfi = tempfiles.begin (); |
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139 | tfi != tempfiles.end (); |
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140 | ++tfi) |
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141 | { |
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142 | unlink (*tfi); |
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143 | } |
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144 | } |
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145 | |
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146 | tempfile::tempfile (const std::string& suffix) |
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147 | : suffix (suffix), |
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148 | fd (-1), |
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149 | level (0) |
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150 | { |
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151 | _name = temporaries.get (suffix); |
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152 | } |
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153 | |
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154 | tempfile::~tempfile () |
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155 | { |
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156 | close (); |
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157 | temporaries.erase (_name); |
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158 | } |
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159 | |
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160 | void |
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161 | tempfile::open (bool writable) |
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162 | { |
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163 | if ((fd < 0) && rld::files::check_file (_name)) |
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164 | { |
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165 | level = 0; |
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166 | fd = ::open (_name.c_str (), writable ? O_RDWR : O_RDONLY); |
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167 | if (fd < 0) |
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168 | throw rld::error (::strerror (errno), "tempfile open:" + _name); |
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169 | } |
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170 | } |
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171 | |
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172 | void |
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173 | tempfile::close () |
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174 | { |
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175 | if (fd != -1) |
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176 | { |
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177 | ::close (fd); |
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178 | fd = -1; |
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179 | level = 0; |
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180 | } |
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181 | } |
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182 | |
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183 | const std::string& |
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184 | tempfile::name () const |
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185 | { |
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186 | return _name; |
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187 | } |
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188 | |
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189 | size_t |
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190 | tempfile::size () |
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191 | { |
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192 | if (fd < 0) |
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193 | return 0; |
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194 | |
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195 | struct stat sb; |
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196 | if (::stat (_name.c_str (), &sb) == 0) |
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197 | return sb.st_size; |
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198 | |
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199 | return 0; |
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200 | } |
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201 | |
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202 | void |
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203 | tempfile::read (std::string& all) |
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204 | { |
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205 | all.clear (); |
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206 | if (fd != -1) |
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207 | { |
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208 | if (level) |
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209 | all.append (buf, level); |
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210 | level = 0; |
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211 | while (true) |
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212 | { |
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213 | int read = ::read (fd, buf, sizeof (buf) ); |
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214 | if (read < 0) |
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215 | throw rld::error (::strerror (errno), "tempfile get read:" + _name); |
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216 | else if (read == 0) |
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217 | break; |
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218 | else |
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219 | all.append (buf, read); |
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220 | } |
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221 | } |
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222 | } |
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223 | |
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224 | void |
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225 | tempfile::read_line (std::string& line) |
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226 | { |
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227 | line.clear (); |
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228 | if (fd != -1) |
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229 | { |
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230 | if (level) |
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231 | line.append (buf, level); |
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232 | level = 0; |
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233 | while (true) |
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234 | { |
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235 | int read = ::read (fd, buf, sizeof (buf)); |
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236 | if (read < 0) |
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237 | throw rld::error (::strerror (errno), "tempfile read:" + _name); |
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238 | else if (read == 0) |
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239 | break; |
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240 | else |
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241 | { |
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242 | char* lf = ::strchr (buf, '\n'); |
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243 | if (lf) |
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244 | { |
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245 | int len = lf - &buf[0] + 1; |
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246 | line.append (buf, len); |
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247 | level = read - len; |
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248 | if (level) |
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249 | ::memmove (buf, &buf[len], level); |
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250 | break; |
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251 | } |
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252 | line.append (buf, read); |
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253 | } |
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254 | } |
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255 | } |
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256 | } |
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257 | |
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258 | void |
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259 | tempfile::write (const std::string& s) |
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260 | { |
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261 | const char* p = s.c_str (); |
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262 | size_t l = s.length (); |
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263 | while (l) |
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264 | { |
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265 | int written = ::write (fd, p, l); |
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266 | if (written < 0) |
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267 | throw rld::error (::strerror (errno), "tempfile write:" + _name); |
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268 | if (written == 0) |
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269 | break; |
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270 | l -= written; |
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271 | } |
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272 | } |
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273 | |
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274 | void |
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275 | tempfile::write_line (const std::string& s) |
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276 | { |
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277 | write (s); |
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278 | write (RLD_LINE_SEPARATOR); |
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279 | } |
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280 | |
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281 | void |
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282 | tempfile::write_lines (const rld::strings& ss) |
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283 | { |
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284 | for (rld::strings::const_iterator ssi = ss.begin (); |
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285 | ssi != ss.end (); |
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286 | ++ssi) |
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287 | { |
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288 | write_line (*ssi); |
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289 | } |
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290 | } |
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291 | |
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292 | void |
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293 | tempfile::output (std::ostream& out) |
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294 | { |
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295 | std::string prefix; |
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296 | output (prefix, out); |
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297 | } |
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298 | |
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299 | void |
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300 | tempfile::output (const std::string& prefix, |
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301 | std::ostream& out, |
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302 | bool line_numbers) |
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303 | { |
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304 | if (fd == -1) |
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305 | { |
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306 | std::string line; |
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307 | int lc = 0; |
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308 | open (); |
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309 | while (true) |
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310 | { |
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311 | read_line (line); |
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312 | ++lc; |
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313 | if (line.empty ()) |
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314 | break; |
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315 | if (!prefix.empty ()) |
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316 | out << prefix << ':'; |
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317 | if (line_numbers) |
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318 | out << lc << ':'; |
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319 | out << line; |
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320 | } |
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321 | close (); |
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322 | } |
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323 | } |
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324 | |
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325 | void |
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326 | set_keep_temporary_files () |
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327 | { |
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328 | keep_temporary_files = true; |
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329 | } |
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330 | |
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331 | void |
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332 | temporaries_clean_up () |
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333 | { |
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334 | temporaries.clean_up (); |
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335 | } |
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336 | |
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337 | status |
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338 | execute (const std::string& pname, |
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339 | const std::string& command, |
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340 | const std::string& outname, |
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341 | const std::string& errname) |
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342 | { |
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343 | arg_container args; |
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344 | parse_command_line (command, args); |
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345 | return execute (pname, args, outname, errname); |
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346 | } |
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347 | |
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348 | status |
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349 | execute (const std::string& pname, |
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350 | const arg_container& args, |
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351 | const std::string& outname, |
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352 | const std::string& errname) |
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353 | { |
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354 | if (rld::verbose () >= RLD_VERBOSE_TRACE) |
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355 | { |
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356 | std::cout << "execute: "; |
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357 | for (size_t a = 0; a < args.size (); ++a) |
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358 | std::cout << args[a] << ' '; |
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359 | std::cout << std::endl; |
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360 | } |
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361 | |
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362 | const char** cargs = new const char* [args.size () + 1]; |
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363 | |
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364 | for (size_t a = 0; a < args.size (); ++a) |
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365 | cargs[a] = args[a].c_str (); |
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366 | cargs[args.size ()] = 0; |
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367 | |
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368 | int err = 0; |
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369 | int s = 0; |
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370 | |
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371 | const char* serr = pex_one (PEX_LAST | PEX_SEARCH, |
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372 | args[0].c_str (), |
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373 | (char* const*) cargs, |
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374 | pname.c_str (), |
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375 | outname.c_str (), |
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376 | errname.c_str (), |
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377 | &s, |
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378 | &err); |
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379 | |
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380 | delete [] cargs; |
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381 | |
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382 | if (serr) |
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383 | throw rld::error ("execute: " + args[0], serr); |
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384 | else if (err) |
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385 | throw rld::error ("execute: " + args[0], ::strerror (err)); |
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386 | |
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387 | status _status; |
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388 | |
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389 | if (rld::verbose () >= RLD_VERBOSE_TRACE) |
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390 | std::cout << "execute: status: "; |
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391 | |
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392 | if (WIFEXITED (s)) |
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393 | { |
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394 | _status.type = status::normal; |
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395 | _status.code = WEXITSTATUS (s); |
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396 | if (rld::verbose () >= RLD_VERBOSE_TRACE) |
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397 | std::cout << _status.code << std::endl; |
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398 | } |
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399 | else if (WIFSIGNALED (s)) |
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400 | { |
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401 | _status.type = status::signal; |
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402 | _status.code = WTERMSIG (s); |
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403 | if (rld::verbose () >= RLD_VERBOSE_TRACE) |
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404 | std::cout << "signal: " << _status.code << std::endl; |
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405 | } |
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406 | else if (WIFSTOPPED (s)) |
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407 | { |
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408 | _status.type = status::stopped; |
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409 | _status.code = WSTOPSIG (s); |
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410 | if (rld::verbose () >= RLD_VERBOSE_TRACE) |
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411 | std::cout << "stopped: " << _status.code << std::endl; |
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412 | } |
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413 | else |
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414 | throw rld::error ("execute: " + args[0], "unknown status returned"); |
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415 | |
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416 | return _status; |
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417 | } |
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418 | |
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419 | /* |
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420 | * The code is based on this C file: |
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421 | * http://cybertiggyr.com/pcm/src/parse.c |
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422 | */ |
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423 | void |
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424 | parse_command_line (const std::string& command, arg_container& args) |
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425 | { |
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426 | enum pstate |
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427 | { |
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428 | pstate_discard_space, |
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429 | pstate_accumulate_quoted, |
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430 | pstate_accumulate_raw |
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431 | }; |
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432 | |
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433 | args.clear (); |
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434 | |
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435 | const char quote = '"'; |
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436 | const char escape = '\\'; |
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437 | pstate state = pstate_discard_space; |
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438 | size_t start = 0; |
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439 | size_t i = 0; |
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440 | |
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441 | while (i < command.size ()) |
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442 | { |
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443 | switch (state) |
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444 | { |
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445 | case pstate_discard_space: |
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446 | if (command[i] == quote) |
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447 | { |
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448 | ++i; |
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449 | start = i; |
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450 | state = pstate_accumulate_quoted; |
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451 | } |
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452 | else if (::isspace (command[i])) |
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453 | { |
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454 | ++i; |
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455 | } |
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456 | else /* includes escape */ |
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457 | { |
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458 | start = i; |
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459 | state = pstate_accumulate_raw; |
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460 | } |
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461 | break; |
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462 | |
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463 | case pstate_accumulate_quoted: |
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464 | if (command[i] == quote) |
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465 | { |
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466 | args.push_back (command.substr (start, i - 1)); |
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467 | ++i; |
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468 | state = pstate_discard_space; |
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469 | } |
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470 | else if ((command[i] == escape) && (command[i + 1] == quote)) |
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471 | { |
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472 | i += 2; |
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473 | } |
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474 | else /* includes space */ |
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475 | { |
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476 | ++i; |
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477 | } |
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478 | break; |
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479 | |
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480 | case pstate_accumulate_raw: |
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481 | if (command[i] == quote) |
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482 | { |
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483 | throw rld::error ("quote in token", "command parse"); |
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484 | } |
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485 | else if ((command[i] == escape) && (command[i + 1] == quote)) |
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486 | { |
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487 | i += 2; |
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488 | } |
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489 | else if (::isspace (command[i])) |
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490 | { |
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491 | args.push_back (command.substr (start, i - 1)); |
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492 | ++i; |
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493 | state = pstate_discard_space; |
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494 | } |
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495 | else |
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496 | { |
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497 | ++i; |
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498 | } |
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499 | break; |
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500 | } |
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501 | } |
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502 | } |
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503 | } |
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504 | } |
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