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annotate liboctave/wrappers/wait-wrappers.c @ 30564:796f54d4ddbf stable

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update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2021. In all .txi and .texi files except gpl.txi and gpl.texi in the doc/liboctave and doc/interpreter directories, change the copyright to "Octave Project Developers", the same as used for other source files. Update copyright notices for 2022 (not done since 2019). For gpl.txi and gpl.texi, change the copyright notice to be "Free Software Foundation, Inc." and leave the date at 2007 only because this file only contains the text of the GPL, not anything created by the Octave Project Developers. Add Paul Thomas to contributors.in.
author John W. Eaton <jwe@octave.org>
date Tue, 28 Dec 2021 18:22:40 -0500
parents 492a37a18b81
children 597f3ee61a48
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2016-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 // These functions may be provided by gnulib. We don't include gnulib
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27 // headers directly in Octave's C++ source files to avoid problems that
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28 // may be caused by the way that gnulib overrides standard library
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29 // functions.
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30
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31 #if defined (HAVE_CONFIG_H)
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32 # include "config.h"
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33 #endif
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34
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35 #include <sys/types.h>
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36 #include <sys/wait.h>
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37
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38 #if defined (__WIN32__) && ! defined (__CYGWIN__)
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39 # include <windows.h>
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40 #endif
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41
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42 #include "wait-wrappers.h"
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43
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44 #if ! defined (WCONTINUE)
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45 # define WCONTINUE 0
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46 #endif
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47
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48 #if ! defined (WNOHANG)
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49 # define WNOHANG 0
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50 #endif
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51
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52 #if ! defined (WUNTRACED)
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53 # define WUNTRACED 0
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54 #endif
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55
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56 #if ! defined (WIFCONTINUED)
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57 # define WIFCONTINUED(x) false
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58 #endif
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59
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60 pid_t
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61 octave_waitpid_wrapper (pid_t pid, int *statusp, int options)
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62 {
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63 #if defined (__WIN32__) && ! defined (__CYGWIN__)
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64 // gnulib's waitpid replacement currently uses _cwait, which
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65 // apparently only works with console applications.
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66 // Implement our own wrapper using win32 API functions.
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67
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68 octave_unused_parameter (options);
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69
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70 pid_t retval = -1;
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71 DWORD status = 0;
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72
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73 HANDLE hProcess = OpenProcess (PROCESS_QUERY_INFORMATION | SYNCHRONIZE,
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74 false, pid);
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75
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76 if (! hProcess)
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77 return retval;
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78
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79 if (WaitForSingleObject (hProcess, INFINITE) != WAIT_OBJECT_0)
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80 {
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81 CloseHandle (hProcess);
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82 return retval;
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83 }
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84
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85 if (! GetExitCodeProcess (hProcess, &status))
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86 {
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87 CloseHandle (hProcess);
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88 return retval;
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89 }
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90
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91 CloseHandle (hProcess);
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92
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93 if (statusp)
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94 *statusp = status;
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95
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96 retval = pid;
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97
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98 return retval;
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99
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100 #else
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101 return waitpid (pid, statusp, options);
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102 #endif
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103 }
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104
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105 int
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106 octave_wcontinue_wrapper (void)
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107 {
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108 return WCONTINUE;
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109 }
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110
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111 int
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112 octave_wnohang_wrapper (void)
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113 {
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114 return WNOHANG;
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115 }
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116
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117 int
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118 octave_wuntraced_wrapper (void)
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119 {
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120 return WUNTRACED;
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121 }
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122
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123 #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC)
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124 // Disable the unused parameter warning for the following wrapper functions.
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125 // The <sys/wait.h> header provided by gnulib may define some of the W*
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126 // macros to expand to a constant and ignore the parameter.
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127 # pragma GCC diagnostic push
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128 # pragma GCC diagnostic ignored "-Wunused-parameter"
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129 #endif
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130
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131 int
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132 octave_wcoredump_wrapper (int status)
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133 {
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134 return WCOREDUMP (status);
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135 }
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136
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137 int
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138 octave_wexitstatus_wrapper (int status)
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139 {
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140 return WEXITSTATUS (status);
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141 }
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142
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143 bool
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144 octave_wifcontinued_wrapper (int status)
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145 {
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146 return WIFCONTINUED (status);
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147 }
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148
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149 bool
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150 octave_wifexited_wrapper (int status)
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151 {
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152 return WIFEXITED (status);
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153 }
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154
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155 bool
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156 octave_wifsignaled_wrapper (int status)
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157 {
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158 return WIFSIGNALED (status);
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159 }
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160
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161 bool
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162 octave_wifstopped_wrapper (int status)
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163 {
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164 return WIFSTOPPED (status);
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165 }
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166
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167 int
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168 octave_wstopsig_wrapper (int status)
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169 {
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170 return WSTOPSIG (status);
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171 }
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172
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173 int
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174 octave_wtermsig_wrapper (int status)
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175 {
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176 return WTERMSIG (status);
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177 }
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178
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179 #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC)
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180 // Restore prevailing warning state for remainder of the file.
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181 # pragma GCC diagnostic pop
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182 #endif