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1 /* |
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2 |
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3 Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003, 2005, 2006, 2007 |
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4 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 3 of the License, or (at your |
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11 option) any later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, see |
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20 <http://www.gnu.org/licenses/>. |
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21 |
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22 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <cerrno> |
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29 #include <cstdlib> |
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30 |
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31 #include <string.h> |
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32 |
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33 #include <sys/types.h> |
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34 #include <unistd.h> |
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35 |
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36 #include <fcntl.h> |
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37 |
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38 // We can't use csignal as kill is not in the std namespace, and picky |
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39 // compiler runtimes will also exclude it from global scope as well. |
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40 |
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41 #include <signal.h> |
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42 |
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43 #include "lo-utils.h" |
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44 #include "lo-sysdep.h" |
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45 #include "oct-syscalls.h" |
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46 #include "str-vec.h" |
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47 |
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48 #define NOT_SUPPORTED(nm) \ |
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49 nm ": not supported on this system" |
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50 |
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51 int |
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52 octave_syscalls::dup2 (int old_fd, int new_fd) |
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53 { |
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54 std::string msg; |
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55 return dup2 (old_fd, new_fd, msg); |
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56 } |
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57 |
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58 int |
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59 octave_syscalls::dup2 (int old_fd, int new_fd, std::string& msg) |
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60 { |
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61 msg = std::string (); |
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62 |
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63 int status = -1; |
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64 |
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65 #if defined (HAVE_DUP2) |
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66 status = ::dup2 (old_fd, new_fd); |
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67 |
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68 if (status < 0) |
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69 { |
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70 using namespace std; |
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71 msg = ::strerror (errno); |
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72 } |
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73 #else |
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74 msg = NOT_SUPPORTED ("dup2"); |
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75 #endif |
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76 |
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77 return status; |
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78 } |
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79 |
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80 int |
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81 octave_syscalls::execvp (const std::string& file, const string_vector& argv) |
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82 { |
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83 std::string msg; |
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84 return execvp (file, argv, msg); |
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85 } |
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86 |
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87 int |
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88 octave_syscalls::execvp (const std::string& file, const string_vector& args, |
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89 std::string& msg) |
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90 { |
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91 msg = std::string (); |
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92 |
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93 int status = -1; |
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94 |
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95 #if defined (HAVE_EXECVP) |
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96 char **argv = args.c_str_vec (); |
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97 |
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98 status = ::execvp (file.c_str (), argv); |
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99 |
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100 string_vector::delete_c_str_vec (argv); |
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101 |
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102 if (status < 0) |
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103 { |
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104 using namespace std; |
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105 msg = ::strerror (errno); |
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106 } |
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107 #else |
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108 msg = NOT_SUPPORTED ("execvp"); |
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109 #endif |
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110 |
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111 return status; |
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112 } |
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113 |
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114 pid_t |
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115 octave_syscalls::fork (std::string& msg) |
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116 { |
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117 pid_t status = -1; |
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118 |
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119 #if defined (HAVE_FORK) |
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120 status = ::fork (); |
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121 |
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122 if (status < 0) |
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123 { |
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124 using namespace std; |
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125 msg = ::strerror (errno); |
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126 } |
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127 #else |
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128 msg = NOT_SUPPORTED ("fork"); |
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129 #endif |
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130 |
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131 return status; |
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132 } |
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133 |
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134 pid_t |
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135 octave_syscalls::vfork (std::string& msg) |
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136 { |
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137 pid_t status = -1; |
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138 |
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139 #if defined (HAVE_VFORK) || defined (HAVE_FORK) |
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140 #if defined (HAVE_VFORK) |
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141 status = ::vfork (); |
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142 #else |
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143 status = ::fork (); |
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144 #endif |
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145 |
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146 if (status < 0) |
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147 { |
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148 using namespace std; |
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149 msg = ::strerror (errno); |
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150 } |
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151 #else |
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152 msg = NOT_SUPPORTED ("vfork"); |
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153 #endif |
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154 |
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155 return status; |
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156 } |
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157 |
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158 pid_t |
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159 octave_syscalls::getpgrp (std::string& msg) |
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160 { |
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161 pid_t status = -1; |
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162 |
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163 #if defined (HAVE_GETPGRP) |
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164 status = ::getpgrp (); |
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165 |
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166 if (status < 0) |
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167 { |
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168 using namespace std; |
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169 msg = ::strerror (errno); |
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170 } |
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171 #else |
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172 msg = NOT_SUPPORTED ("getpgrp"); |
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173 #endif |
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174 |
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175 return status; |
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176 } |
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177 |
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178 pid_t |
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179 octave_syscalls::getpid (void) |
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180 { |
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181 #if defined (HAVE_GETPID) |
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182 return ::getpid (); |
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183 #else |
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184 return 0; |
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185 #endif |
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186 } |
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187 |
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188 pid_t |
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189 octave_syscalls::getppid (void) |
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190 { |
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191 #if defined (HAVE_GETPPID) |
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192 return ::getppid (); |
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193 #else |
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194 return 0; |
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195 #endif |
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196 } |
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197 |
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198 gid_t |
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199 octave_syscalls::getgid (void) |
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200 { |
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201 #if defined (HAVE_GETGID) |
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202 return ::getgid (); |
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203 #else |
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204 return 0; |
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205 #endif |
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206 } |
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207 |
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208 gid_t |
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209 octave_syscalls::getegid (void) |
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210 { |
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211 #if defined (HAVE_GETEGID) |
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212 return ::getegid (); |
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213 #else |
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214 return 0; |
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215 #endif |
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216 } |
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217 |
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218 uid_t |
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219 octave_syscalls::getuid (void) |
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220 { |
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221 #if defined (HAVE_GETUID) |
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222 return ::getuid (); |
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223 #else |
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224 return 0; |
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225 #endif |
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226 } |
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227 |
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228 uid_t |
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229 octave_syscalls::geteuid (void) |
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230 { |
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231 #if defined (HAVE_GETEUID) |
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232 return ::geteuid (); |
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233 #else |
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234 return 0; |
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235 #endif |
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236 } |
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237 |
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238 int |
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239 octave_syscalls::pipe (int *fildes) |
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240 { |
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241 std::string msg; |
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242 return pipe (fildes, msg); |
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243 } |
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244 |
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245 int |
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246 octave_syscalls::pipe (int *fildes, std::string& msg) |
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247 { |
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248 msg = std::string (); |
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249 |
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250 int status = -1; |
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251 |
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252 #if defined (HAVE_PIPE) |
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253 status = ::pipe (fildes); |
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254 |
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255 if (status < 0) |
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256 { |
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257 using namespace std; |
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258 msg = ::strerror (errno); |
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259 } |
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260 #else |
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261 msg = NOT_SUPPORTED ("pipe"); |
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262 #endif |
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263 |
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264 return status; |
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265 } |
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266 |
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267 pid_t |
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268 octave_syscalls::waitpid (pid_t pid, int *status, int options) |
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269 { |
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270 std::string msg; |
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271 return waitpid (pid, status, options, msg); |
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272 } |
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273 |
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274 pid_t |
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275 octave_syscalls::waitpid (pid_t pid, int *status, int options, |
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276 std::string& msg) |
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277 { |
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278 pid_t retval = -1; |
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279 msg = std::string (); |
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280 |
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281 #if defined (HAVE_WAITPID) |
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282 retval = ::octave_waitpid (pid, status, options); |
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283 |
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284 if (retval < 0) |
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285 { |
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286 using namespace std; |
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287 msg = ::strerror (errno); |
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288 } |
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289 #else |
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290 msg = NOT_SUPPORTED ("waitpid"); |
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291 #endif |
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292 |
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293 return retval; |
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294 } |
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295 |
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296 int |
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297 octave_syscalls::kill (pid_t pid, int sig) |
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298 { |
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299 std::string msg; |
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300 return kill (pid, sig, msg); |
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301 } |
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302 |
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303 int |
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304 octave_syscalls::kill (pid_t pid, int sig, std::string& msg) |
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305 { |
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306 msg = std::string (); |
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307 |
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308 int status = -1; |
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309 |
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310 #if defined (HAVE_KILL) |
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311 status = ::kill (pid, sig); |
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312 |
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313 if (status < 0) |
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314 { |
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315 using namespace std; |
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316 msg = ::strerror (errno); |
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317 } |
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318 #else |
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319 msg = NOT_SUPPORTED ("kill"); |
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320 #endif |
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321 |
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322 return status; |
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323 } |
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324 |
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325 pid_t |
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326 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, |
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327 bool sync_mode, int *fildes) |
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328 { |
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329 std::string msg; |
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330 bool interactive = false; |
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331 return popen2 (cmd, args, sync_mode, fildes, msg, interactive); |
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332 } |
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333 |
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334 pid_t |
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335 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, |
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336 bool sync_mode, int *fildes, std::string& msg) |
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337 { |
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338 bool interactive = false; |
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339 return popen2 (cmd, args, sync_mode, fildes, msg, interactive); |
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340 } |
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341 |
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342 pid_t |
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343 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, |
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344 bool sync_mode, int *fildes, std::string& msg, bool &interactive) |
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345 { |
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346 #if defined (__WIN32__) && ! defined (__CYGWIN__) |
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347 return ::octave_popen2 (cmd, args, sync_mode, fildes, msg); |
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348 #else |
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349 pid_t pid; |
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350 int child_stdin[2], child_stdout[2]; |
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351 |
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352 if (pipe (child_stdin, msg) == 0) |
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353 { |
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354 if (pipe (child_stdout, msg) == 0) |
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355 { |
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356 pid = fork (msg); |
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357 if (pid < 0) |
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358 msg = "popen2: process creation failed -- " + msg; |
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359 else if (pid == 0) |
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360 { |
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361 std::string child_msg; |
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362 |
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363 interactive = false; |
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364 |
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365 // Child process |
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366 ::close (child_stdin[1]); |
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367 ::close (child_stdout[0]); |
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368 |
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369 if (dup2 (child_stdin[0], STDIN_FILENO) >= 0) |
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370 { |
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371 ::close (child_stdin[0]); |
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372 if (dup2 (child_stdout[1], STDOUT_FILENO) >= 0) |
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373 { |
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374 ::close (child_stdout[1]); |
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375 if (execvp (cmd, args, child_msg) < 0) |
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376 child_msg = "popen2 (child): unable to start process -- " + child_msg; |
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377 } |
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378 else |
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379 child_msg = "popen2 (child): file handle duplication failed -- " + child_msg; |
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380 } |
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381 else |
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382 child_msg = "popen2 (child): file handle duplication failed -- " + child_msg; |
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383 |
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384 (*current_liboctave_error_handler)(child_msg.c_str()); |
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385 |
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386 exit(0); |
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387 } |
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388 else |
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389 { |
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390 // Parent process |
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391 ::close (child_stdin[0]); |
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392 ::close (child_stdout[1]); |
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393 #if defined (F_SETFL) && defined (O_NONBLOCK) |
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394 if (! sync_mode && octave_fcntl (child_stdout[0], F_SETFL, O_NONBLOCK, msg) < 0) |
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395 msg = "popen2: error setting file mode -- " + msg; |
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396 else |
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397 #endif |
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398 { |
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399 fildes[0] = child_stdin [1]; |
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400 fildes[1] = child_stdout [0]; |
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401 return pid; |
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402 } |
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403 } |
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404 ::close (child_stdout[0]); |
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405 ::close (child_stdout[1]); |
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406 } |
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407 else |
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408 msg = "popen2: pipe creation failed -- " + msg; |
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409 ::close (child_stdin[0]); |
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410 ::close (child_stdin[1]); |
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411 } |
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412 else |
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413 msg = "popen2: pipe creation failed -- " + msg; |
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414 |
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415 return -1; |
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416 #endif |
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417 } |
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418 |
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419 int |
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420 octave_fcntl (int fd, int cmd, long arg) |
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421 { |
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422 std::string msg; |
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423 return octave_fcntl (fd, cmd, arg, msg); |
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424 } |
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425 |
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426 int |
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427 octave_fcntl (int fd, int cmd, long arg, std::string& msg) |
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428 { |
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429 msg = std::string (); |
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430 |
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431 int status = -1; |
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432 |
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433 status = ::fcntl (fd, cmd, arg); |
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434 |
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435 if (status < 0) |
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436 { |
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437 using namespace std; |
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438 msg = ::strerror (errno); |
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439 } |
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440 |
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441 return status; |
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442 } |
