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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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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 |
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30 #include <string.h> |
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31 |
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32 #ifdef HAVE_SYS_TYPES_H |
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33 #include <sys/types.h> |
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34 #endif |
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35 |
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36 #ifdef HAVE_UNISTD_H |
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37 #include <unistd.h> |
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38 #endif |
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39 |
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40 #ifdef HAVE_FCNTL_H |
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41 #include <fcntl.h> |
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42 #endif |
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43 |
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44 // We can't use csignal as kill is not in the std namespace, and picky |
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45 // compiler runtimes will also exclude it from global scope as well. |
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46 |
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47 #include <signal.h> |
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48 |
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49 #include "lo-utils.h" |
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50 #include "lo-sysdep.h" |
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51 #include "oct-syscalls.h" |
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52 #include "str-vec.h" |
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53 |
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54 #define NOT_SUPPORTED(nm) \ |
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55 nm ": not supported on this system" |
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56 |
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57 int |
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58 octave_syscalls::dup2 (int old_fd, int new_fd) |
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59 { |
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60 std::string msg; |
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61 return dup2 (old_fd, new_fd, msg); |
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62 } |
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63 |
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64 int |
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65 octave_syscalls::dup2 (int old_fd, int new_fd, std::string& msg) |
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66 { |
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67 msg = std::string (); |
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68 |
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69 int status = -1; |
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70 |
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71 #if defined (HAVE_DUP2) |
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72 status = ::dup2 (old_fd, new_fd); |
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73 |
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74 if (status < 0) |
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75 { |
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76 using namespace std; |
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77 msg = ::strerror (errno); |
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78 } |
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79 #else |
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80 msg = NOT_SUPPORTED ("dup2"); |
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81 #endif |
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82 |
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83 return status; |
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84 } |
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85 |
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86 int |
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87 octave_syscalls::execvp (const std::string& file, const string_vector& argv) |
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88 { |
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89 std::string msg; |
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90 return execvp (file, argv, msg); |
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91 } |
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92 |
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93 int |
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94 octave_syscalls::execvp (const std::string& file, const string_vector& args, |
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95 std::string& msg) |
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96 { |
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97 msg = std::string (); |
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98 |
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99 int status = -1; |
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100 |
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101 #if defined (HAVE_EXECVP) |
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102 char **argv = args.c_str_vec (); |
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103 |
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104 status = ::execvp (file.c_str (), argv); |
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105 |
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106 string_vector::delete_c_str_vec (argv); |
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107 |
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108 if (status < 0) |
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109 { |
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110 using namespace std; |
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111 msg = ::strerror (errno); |
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112 } |
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113 #else |
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114 msg = NOT_SUPPORTED ("execvp"); |
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115 #endif |
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116 |
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117 return status; |
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118 } |
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119 |
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120 int |
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121 octave_syscalls::fcntl (int fd, int cmd, long arg) |
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122 { |
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123 std::string msg; |
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124 return fcntl (fd, cmd, arg, msg); |
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125 } |
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126 |
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127 int |
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128 octave_syscalls::fcntl (int fd, int cmd, long arg, std::string& msg) |
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129 { |
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130 msg = std::string (); |
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131 |
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132 int status = -1; |
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133 |
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134 #if defined (HAVE_FCNTL) |
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135 status = ::fcntl (fd, cmd, arg); |
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136 |
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137 if (status < 0) |
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138 { |
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139 using namespace std; |
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140 msg = ::strerror (errno); |
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141 } |
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142 #else |
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143 msg = NOT_SUPPORTED ("fcntl"); |
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144 #endif |
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145 |
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146 return status; |
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147 } |
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148 |
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149 pid_t |
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150 octave_syscalls::fork (std::string& msg) |
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151 { |
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152 pid_t status = -1; |
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153 |
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154 #if defined (HAVE_FORK) |
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155 status = ::fork (); |
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156 |
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157 if (status < 0) |
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158 { |
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159 using namespace std; |
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160 msg = ::strerror (errno); |
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161 } |
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162 #else |
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163 msg = NOT_SUPPORTED ("fork"); |
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164 #endif |
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165 |
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166 return status; |
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167 } |
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168 |
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169 pid_t |
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170 octave_syscalls::vfork (std::string& msg) |
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171 { |
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172 pid_t status = -1; |
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173 |
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174 #if defined (HAVE_VFORK) || defined (HAVE_FORK) |
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175 #if defined (HAVE_VFORK) |
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176 status = ::vfork (); |
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177 #else |
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178 status = ::fork (); |
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179 #endif |
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180 |
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181 if (status < 0) |
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182 { |
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183 using namespace std; |
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184 msg = ::strerror (errno); |
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185 } |
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186 #else |
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187 msg = NOT_SUPPORTED ("vfork"); |
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188 #endif |
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189 |
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190 return status; |
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191 } |
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192 |
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193 pid_t |
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194 octave_syscalls::getpgrp (std::string& msg) |
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195 { |
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196 pid_t status = -1; |
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197 |
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198 #if defined (HAVE_GETPGRP) |
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199 status = ::getpgrp (); |
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200 |
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201 if (status < 0) |
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202 { |
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203 using namespace std; |
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204 msg = ::strerror (errno); |
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205 } |
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206 #else |
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207 msg = NOT_SUPPORTED ("getpgrp"); |
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208 #endif |
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209 |
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210 return status; |
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211 } |
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212 |
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213 pid_t |
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214 octave_syscalls::getpid (void) |
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215 { |
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216 #if defined (HAVE_GETPID) |
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217 return ::getpid (); |
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218 #else |
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219 return 0; |
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220 #endif |
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221 } |
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222 |
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223 pid_t |
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224 octave_syscalls::getppid (void) |
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225 { |
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226 #if defined (HAVE_GETPPID) |
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227 return ::getppid (); |
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228 #else |
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229 return 0; |
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230 #endif |
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231 } |
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232 |
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233 gid_t |
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234 octave_syscalls::getgid (void) |
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235 { |
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236 #if defined (HAVE_GETGID) |
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237 return ::getgid (); |
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238 #else |
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239 return 0; |
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240 #endif |
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241 } |
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242 |
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243 gid_t |
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244 octave_syscalls::getegid (void) |
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245 { |
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246 #if defined (HAVE_GETEGID) |
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247 return ::getegid (); |
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248 #else |
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249 return 0; |
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250 #endif |
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251 } |
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252 |
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253 uid_t |
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254 octave_syscalls::getuid (void) |
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255 { |
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256 #if defined (HAVE_GETUID) |
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257 return ::getuid (); |
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258 #else |
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259 return 0; |
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260 #endif |
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261 } |
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262 |
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263 uid_t |
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264 octave_syscalls::geteuid (void) |
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265 { |
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266 #if defined (HAVE_GETEUID) |
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267 return ::geteuid (); |
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268 #else |
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269 return 0; |
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270 #endif |
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271 } |
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272 |
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273 int |
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274 octave_syscalls::pipe (int *fildes) |
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275 { |
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276 std::string msg; |
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277 return pipe (fildes, msg); |
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278 } |
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279 |
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280 int |
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281 octave_syscalls::pipe (int *fildes, std::string& msg) |
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282 { |
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283 msg = std::string (); |
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284 |
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285 int status = -1; |
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286 |
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287 #if defined (HAVE_PIPE) |
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288 status = ::pipe (fildes); |
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289 |
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290 if (status < 0) |
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291 { |
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292 using namespace std; |
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293 msg = ::strerror (errno); |
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294 } |
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295 #else |
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296 msg = NOT_SUPPORTED ("pipe"); |
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297 #endif |
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298 |
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299 return status; |
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300 } |
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301 |
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302 pid_t |
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303 octave_syscalls::waitpid (pid_t pid, int *status, int options) |
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304 { |
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305 std::string msg; |
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306 return waitpid (pid, status, options, msg); |
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307 } |
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308 |
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309 pid_t |
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310 octave_syscalls::waitpid (pid_t pid, int *status, int options, |
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311 std::string& msg) |
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312 { |
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313 pid_t retval = -1; |
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314 msg = std::string (); |
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315 |
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316 #if defined (HAVE_WAITPID) |
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317 retval = ::octave_waitpid (pid, status, options); |
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318 |
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319 if (retval < 0) |
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320 { |
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321 using namespace std; |
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322 msg = ::strerror (errno); |
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323 } |
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324 #else |
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325 msg = NOT_SUPPORTED ("waitpid"); |
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326 #endif |
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327 |
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328 return retval; |
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329 } |
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330 |
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331 int |
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332 octave_syscalls::kill (pid_t pid, int sig) |
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333 { |
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334 std::string msg; |
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335 return kill (pid, sig, msg); |
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336 } |
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337 |
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338 int |
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339 octave_syscalls::kill (pid_t pid, int sig, std::string& msg) |
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340 { |
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341 msg = std::string (); |
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342 |
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343 int status = -1; |
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344 |
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345 #if defined (HAVE_KILL) |
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346 status = ::kill (pid, sig); |
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347 |
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348 if (status < 0) |
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349 { |
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350 using namespace std; |
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351 msg = ::strerror (errno); |
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352 } |
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353 #else |
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354 msg = NOT_SUPPORTED ("kill"); |
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355 #endif |
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356 |
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357 return status; |
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358 } |
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359 |
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360 pid_t |
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361 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, |
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362 bool sync_mode, int *fildes) |
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363 { |
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364 std::string msg; |
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365 bool interactive = false; |
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366 return popen2 (cmd, args, sync_mode, fildes, msg, interactive); |
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367 } |
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368 |
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369 pid_t |
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370 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, |
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371 bool sync_mode, int *fildes, std::string& msg) |
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372 { |
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373 bool interactive = false; |
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374 return popen2 (cmd, args, sync_mode, fildes, msg, interactive); |
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375 } |
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376 |
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377 pid_t |
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378 octave_syscalls::popen2 (const std::string& cmd, const string_vector& args, |
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379 bool sync_mode, int *fildes, std::string& msg, bool &interactive) |
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380 { |
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381 #if defined (__WIN32__) && ! defined (__CYGWIN__) |
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382 return ::octave_popen2 (cmd, args, sync_mode, fildes, msg); |
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383 #else |
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384 pid_t pid; |
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385 int child_stdin[2], child_stdout[2]; |
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386 |
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387 if (pipe (child_stdin, msg) == 0) |
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388 { |
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389 if (pipe (child_stdout, msg) == 0) |
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390 { |
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391 pid = fork (msg); |
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392 if (pid < 0) |
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393 msg = "popen2: process creation failed -- " + msg; |
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394 else if (pid == 0) |
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395 { |
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396 std::string child_msg; |
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397 |
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398 interactive = false; |
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399 |
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400 // Child process |
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401 ::close (child_stdin[1]); |
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402 ::close (child_stdout[0]); |
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403 |
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404 if (dup2 (child_stdin[0], STDIN_FILENO) >= 0) |
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405 { |
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406 ::close (child_stdin[0]); |
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407 if (dup2 (child_stdout[1], STDOUT_FILENO) >= 0) |
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408 { |
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409 ::close (child_stdout[1]); |
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410 if (execvp (cmd, args, child_msg) < 0) |
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411 child_msg = "popen2 (child): unable to start process -- " + child_msg; |
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412 } |
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413 else |
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414 child_msg = "popen2 (child): file handle duplication failed -- " + child_msg; |
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415 } |
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416 else |
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417 child_msg = "popen2 (child): file handle duplication failed -- " + child_msg; |
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418 |
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419 (*current_liboctave_error_handler)(child_msg.c_str()); |
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420 |
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421 exit(0); |
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422 } |
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423 else |
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424 { |
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425 // Parent process |
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426 ::close (child_stdin[0]); |
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427 ::close (child_stdout[1]); |
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428 #if defined (F_SETFL) && defined (O_NONBLOCK) |
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429 if (! sync_mode && fcntl (child_stdout[0], F_SETFL, O_NONBLOCK, msg) < 0) |
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430 msg = "popen2: error setting file mode -- " + msg; |
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431 else |
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432 #endif |
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433 { |
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434 fildes[0] = child_stdin [1]; |
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435 fildes[1] = child_stdout [0]; |
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436 return pid; |
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437 } |
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438 } |
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439 ::close (child_stdout[0]); |
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440 ::close (child_stdout[1]); |
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441 } |
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442 else |
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443 msg = "popen2: pipe creation failed -- " + msg; |
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444 ::close (child_stdin[0]); |
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445 ::close (child_stdin[1]); |
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446 } |
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447 else |
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448 msg = "popen2: pipe creation failed -- " + msg; |
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449 |
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450 return -1; |
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451 #endif |
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452 } |
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453 |
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454 /* |
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455 ;;; Local Variables: *** |
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456 ;;; mode: C++ *** |
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457 ;;; End: *** |
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458 */ |
