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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 #ifdef HAVE_SYS_TYPES_H |
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34 #include <sys/types.h> |
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35 #endif |
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36 |
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37 #ifdef HAVE_UNISTD_H |
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38 #include <unistd.h> |
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39 #endif |
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40 |
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41 #ifdef HAVE_FCNTL_H |
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42 #include <fcntl.h> |
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43 #endif |
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44 |
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45 // We can't use csignal as kill is not in the std namespace, and picky |
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46 // compiler runtimes will also exclude it from global scope as well. |
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47 |
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48 #include <signal.h> |
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49 |
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50 #include "lo-utils.h" |
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51 #include "lo-sysdep.h" |
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52 #include "oct-syscalls.h" |
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53 #include "str-vec.h" |
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54 |
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55 #define NOT_SUPPORTED(nm) \ |
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56 nm ": not supported on this system" |
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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) |
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60 { |
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61 std::string msg; |
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62 return dup2 (old_fd, new_fd, msg); |
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63 } |
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64 |
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65 int |
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66 octave_syscalls::dup2 (int old_fd, int new_fd, std::string& msg) |
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67 { |
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68 msg = std::string (); |
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69 |
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70 int status = -1; |
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71 |
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72 #if defined (HAVE_DUP2) |
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73 status = ::dup2 (old_fd, new_fd); |
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74 |
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75 if (status < 0) |
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76 { |
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77 using namespace std; |
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78 msg = ::strerror (errno); |
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79 } |
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80 #else |
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81 msg = NOT_SUPPORTED ("dup2"); |
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82 #endif |
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83 |
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84 return status; |
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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& argv) |
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89 { |
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90 std::string msg; |
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91 return execvp (file, argv, msg); |
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92 } |
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93 |
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94 int |
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95 octave_syscalls::execvp (const std::string& file, const string_vector& args, |
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96 std::string& msg) |
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97 { |
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98 msg = std::string (); |
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99 |
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100 int status = -1; |
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101 |
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102 #if defined (HAVE_EXECVP) |
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103 char **argv = args.c_str_vec (); |
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104 |
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105 status = ::execvp (file.c_str (), argv); |
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106 |
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107 string_vector::delete_c_str_vec (argv); |
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108 |
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109 if (status < 0) |
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110 { |
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111 using namespace std; |
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112 msg = ::strerror (errno); |
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113 } |
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114 #else |
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115 msg = NOT_SUPPORTED ("execvp"); |
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116 #endif |
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117 |
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118 return status; |
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119 } |
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120 |
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121 int |
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122 octave_syscalls::fcntl (int fd, int cmd, long arg) |
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123 { |
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124 std::string msg; |
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125 return fcntl (fd, cmd, arg, msg); |
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126 } |
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127 |
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128 int |
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129 octave_syscalls::fcntl (int fd, int cmd, long arg, std::string& msg) |
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130 { |
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131 msg = std::string (); |
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132 |
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133 int status = -1; |
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134 |
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135 #if defined (HAVE_FCNTL) |
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136 status = ::fcntl (fd, cmd, arg); |
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137 |
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138 if (status < 0) |
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139 { |
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140 using namespace std; |
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141 msg = ::strerror (errno); |
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142 } |
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143 #else |
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144 msg = NOT_SUPPORTED ("fcntl"); |
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145 #endif |
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146 |
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147 return status; |
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148 } |
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149 |
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150 pid_t |
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151 octave_syscalls::fork (std::string& msg) |
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152 { |
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153 pid_t status = -1; |
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154 |
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155 #if defined (HAVE_FORK) |
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156 status = ::fork (); |
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157 |
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158 if (status < 0) |
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159 { |
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160 using namespace std; |
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161 msg = ::strerror (errno); |
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162 } |
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163 #else |
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164 msg = NOT_SUPPORTED ("fork"); |
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165 #endif |
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166 |
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167 return status; |
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168 } |
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169 |
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170 pid_t |
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171 octave_syscalls::vfork (std::string& msg) |
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172 { |
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173 pid_t status = -1; |
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174 |
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175 #if defined (HAVE_VFORK) || defined (HAVE_FORK) |
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176 #if defined (HAVE_VFORK) |
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177 status = ::vfork (); |
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178 #else |
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179 status = ::fork (); |
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180 #endif |
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181 |
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182 if (status < 0) |
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183 { |
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184 using namespace std; |
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185 msg = ::strerror (errno); |
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186 } |
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187 #else |
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188 msg = NOT_SUPPORTED ("vfork"); |
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189 #endif |
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190 |
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191 return status; |
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192 } |
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193 |
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194 pid_t |
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195 octave_syscalls::getpgrp (std::string& msg) |
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196 { |
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197 pid_t status = -1; |
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198 |
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199 #if defined (HAVE_GETPGRP) |
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200 status = ::getpgrp (); |
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201 |
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202 if (status < 0) |
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203 { |
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204 using namespace std; |
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205 msg = ::strerror (errno); |
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206 } |
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207 #else |
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208 msg = NOT_SUPPORTED ("getpgrp"); |
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209 #endif |
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210 |
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211 return status; |
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212 } |
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213 |
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214 pid_t |
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215 octave_syscalls::getpid (void) |
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216 { |
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217 #if defined (HAVE_GETPID) |
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218 return ::getpid (); |
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219 #else |
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220 return 0; |
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221 #endif |
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222 } |
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223 |
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224 pid_t |
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225 octave_syscalls::getppid (void) |
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226 { |
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227 #if defined (HAVE_GETPPID) |
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228 return ::getppid (); |
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229 #else |
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230 return 0; |
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231 #endif |
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232 } |
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233 |
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234 gid_t |
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235 octave_syscalls::getgid (void) |
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236 { |
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237 #if defined (HAVE_GETGID) |
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238 return ::getgid (); |
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239 #else |
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240 return 0; |
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241 #endif |
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242 } |
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243 |
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244 gid_t |
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245 octave_syscalls::getegid (void) |
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246 { |
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247 #if defined (HAVE_GETEGID) |
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248 return ::getegid (); |
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249 #else |
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250 return 0; |
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251 #endif |
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252 } |
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253 |
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254 uid_t |
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255 octave_syscalls::getuid (void) |
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256 { |
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257 #if defined (HAVE_GETUID) |
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258 return ::getuid (); |
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259 #else |
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260 return 0; |
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261 #endif |
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262 } |
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263 |
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264 uid_t |
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265 octave_syscalls::geteuid (void) |
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266 { |
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267 #if defined (HAVE_GETEUID) |
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268 return ::geteuid (); |
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269 #else |
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270 return 0; |
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271 #endif |
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272 } |
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273 |
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274 int |
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275 octave_syscalls::pipe (int *fildes) |
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276 { |
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277 std::string msg; |
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278 return pipe (fildes, msg); |
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279 } |
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280 |
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281 int |
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282 octave_syscalls::pipe (int *fildes, std::string& msg) |
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283 { |
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284 msg = std::string (); |
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285 |
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286 int status = -1; |
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287 |
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288 #if defined (HAVE_PIPE) |
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289 status = ::pipe (fildes); |
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290 |
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291 if (status < 0) |
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292 { |
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293 using namespace std; |
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294 msg = ::strerror (errno); |
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295 } |
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296 #else |
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297 msg = NOT_SUPPORTED ("pipe"); |
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298 #endif |
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299 |
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300 return status; |
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301 } |
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302 |
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303 pid_t |
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304 octave_syscalls::waitpid (pid_t pid, int *status, int options) |
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305 { |
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306 std::string msg; |
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307 return waitpid (pid, status, options, msg); |
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308 } |
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309 |
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310 pid_t |
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311 octave_syscalls::waitpid (pid_t pid, int *status, int options, |
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312 std::string& msg) |
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313 { |
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314 pid_t retval = -1; |
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315 msg = std::string (); |
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316 |
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317 #if defined (HAVE_WAITPID) |
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318 retval = ::octave_waitpid (pid, status, options); |
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319 |
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320 if (retval < 0) |
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321 { |
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322 using namespace std; |
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323 msg = ::strerror (errno); |
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324 } |
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325 #else |
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326 msg = NOT_SUPPORTED ("waitpid"); |
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327 #endif |
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328 |
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329 return retval; |
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330 } |
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331 |
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332 int |
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333 octave_syscalls::kill (pid_t pid, int sig) |
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334 { |
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335 std::string msg; |
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336 return kill (pid, sig, msg); |
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337 } |
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338 |
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339 int |
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340 octave_syscalls::kill (pid_t pid, int sig, std::string& msg) |
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341 { |
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342 msg = std::string (); |
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343 |
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344 int status = -1; |
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345 |
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346 #if defined (HAVE_KILL) |
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347 status = ::kill (pid, sig); |
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348 |
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349 if (status < 0) |
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350 { |
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351 using namespace std; |
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352 msg = ::strerror (errno); |
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353 } |
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354 #else |
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355 msg = NOT_SUPPORTED ("kill"); |
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356 #endif |
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357 |
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358 return status; |
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359 } |
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360 |
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361 pid_t |
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362 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, |
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363 bool sync_mode, int *fildes) |
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364 { |
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365 std::string msg; |
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366 bool interactive = false; |
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367 return popen2 (cmd, args, sync_mode, fildes, msg, interactive); |
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368 } |
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369 |
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370 pid_t |
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371 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, |
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372 bool sync_mode, int *fildes, std::string& msg) |
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373 { |
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374 bool interactive = false; |
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375 return popen2 (cmd, args, sync_mode, fildes, msg, interactive); |
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376 } |
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377 |
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378 pid_t |
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379 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, |
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380 bool sync_mode, int *fildes, std::string& msg, bool &interactive) |
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381 { |
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382 #if defined (__WIN32__) && ! defined (__CYGWIN__) |
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383 return ::octave_popen2 (cmd, args, sync_mode, fildes, msg); |
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384 #else |
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385 pid_t pid; |
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386 int child_stdin[2], child_stdout[2]; |
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387 |
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388 if (pipe (child_stdin, msg) == 0) |
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389 { |
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390 if (pipe (child_stdout, msg) == 0) |
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391 { |
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392 pid = fork (msg); |
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393 if (pid < 0) |
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394 msg = "popen2: process creation failed -- " + msg; |
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395 else if (pid == 0) |
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396 { |
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397 std::string child_msg; |
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398 |
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399 interactive = false; |
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400 |
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401 // Child process |
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402 ::close (child_stdin[1]); |
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403 ::close (child_stdout[0]); |
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404 |
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405 if (dup2 (child_stdin[0], STDIN_FILENO) >= 0) |
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406 { |
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407 ::close (child_stdin[0]); |
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408 if (dup2 (child_stdout[1], STDOUT_FILENO) >= 0) |
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409 { |
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410 ::close (child_stdout[1]); |
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411 if (execvp (cmd, args, child_msg) < 0) |
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412 child_msg = "popen2 (child): unable to start process -- " + child_msg; |
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413 } |
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414 else |
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415 child_msg = "popen2 (child): file handle duplication failed -- " + child_msg; |
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416 } |
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417 else |
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418 child_msg = "popen2 (child): file handle duplication failed -- " + child_msg; |
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419 |
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420 (*current_liboctave_error_handler)(child_msg.c_str()); |
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421 |
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422 exit(0); |
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423 } |
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424 else |
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425 { |
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426 // Parent process |
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427 ::close (child_stdin[0]); |
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428 ::close (child_stdout[1]); |
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429 #if defined (F_SETFL) && defined (O_NONBLOCK) |
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430 if (! sync_mode && fcntl (child_stdout[0], F_SETFL, O_NONBLOCK, msg) < 0) |
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431 msg = "popen2: error setting file mode -- " + msg; |
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432 else |
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433 #endif |
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434 { |
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435 fildes[0] = child_stdin [1]; |
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436 fildes[1] = child_stdout [0]; |
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437 return pid; |
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438 } |
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439 } |
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440 ::close (child_stdout[0]); |
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441 ::close (child_stdout[1]); |
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442 } |
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443 else |
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444 msg = "popen2: pipe creation failed -- " + msg; |
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445 ::close (child_stdin[0]); |
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446 ::close (child_stdin[1]); |
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447 } |
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448 else |
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449 msg = "popen2: pipe creation failed -- " + msg; |
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450 |
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451 return -1; |
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452 #endif |
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453 } |
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454 |
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455 /* |
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456 ;;; Local Variables: *** |
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457 ;;; mode: C++ *** |
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458 ;;; End: *** |
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459 */ |
