annotate libinterp/corefcn/oct-procbuf.cc @ 28223:45763d59cb4f stable

use nullptr instead of NULL or 0 in a few more places * QWinTerminalImpl.cpp, oct-procbuf.cc, audioread.cc, jit-typeinfo.cc, lo-sysdep.cc, url-transfer.cc, shared-fcns.h: Replace NULL and 0 with nullptr where appropriate.
author John W. Eaton <jwe@octave.org>
date Wed, 15 Apr 2020 15:55:32 -0400
parents bd51beb6205e
children 0a5b15007766
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2020 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 #if defined (HAVE_CONFIG_H)
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27 # include "config.h"
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28 #endif
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29
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30 #include <cerrno>
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31
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32 #include <iomanip>
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33
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34 // FIXME: we would prefer to avoid including these directly in Octave
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35 // sources, but eliminating them is complicated by the mingling of
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36 // octave_procbuf_list and the calls to system library functions like
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37 // execl.
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38
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39 #if defined (HAVE_UNISTD_H)
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40 # if defined (HAVE_SYS_TYPES_H)
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41 # include <sys/types.h>
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42 # endif
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43 # include <unistd.h>
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44 #endif
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45
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46 #include "lo-mappers.h"
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47 #include "lo-utils.h"
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48 #include "oct-procbuf.h"
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49 #include "oct-syscalls.h"
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50 #include "sysdep.h"
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51 #include "unistd-wrappers.h"
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52 #include "variables.h"
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53
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54 #include "defun.h"
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55 #include "errwarn.h"
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56 #include "utils.h"
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57
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58 #if ! defined (SHELL_PATH)
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59 # define SHELL_PATH "/bin/sh"
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60 #endif
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61
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62 // This class is based on the procbuf class from libg++, written by
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63 // Per Bothner, Copyright (C) 1993 Free Software Foundation.
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64
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65 #if (! (defined (__CYGWIN__) || defined (__MINGW32__) || defined (_MSC_VER)) \
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66 && defined (HAVE_UNISTD_H))
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67
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68 static octave_procbuf *octave_procbuf_list = nullptr;
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69
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70 #endif
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71
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72 #if ! defined (BUFSIZ)
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73 # define BUFSIZ 1024
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74 #endif
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75
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76 octave_procbuf *
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77 octave_procbuf::open (const char *command, int mode)
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78 {
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79 #if defined (__CYGWIN__) || defined (__MINGW32__) || defined (_MSC_VER)
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80
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81 if (is_open ())
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82 return 0;
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83
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84 f = (octave::popen (command, (mode & std::ios::in) ? "r" : "w"));
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85
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86 if (! f)
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87 return 0;
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88
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89 // Oops... popen doesn't return the associated pid, so fake it for now
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90
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91 proc_pid = 1;
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92
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93 open_p = true;
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94
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95 if (mode & std::ios::out)
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96 ::setvbuf (f, nullptr, _IOLBF, BUFSIZ);
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97
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98 return this;
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99
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100 #elif defined (HAVE_UNISTD_H)
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101
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102 int pipe_fds[2];
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103
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104 volatile int child_std_end = (mode & std::ios::in) ? 1 : 0;
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105
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106 volatile int parent_end, child_end;
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107
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108 if (is_open ())
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109 return nullptr;
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110
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111 if (octave::sys::pipe (pipe_fds) < 0)
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112 return nullptr;
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113
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114 if (mode & std::ios::in)
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115 {
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116 parent_end = pipe_fds[0];
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117 child_end = pipe_fds[1];
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118 }
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119 else
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120 {
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121 parent_end = pipe_fds[1];
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122 child_end = pipe_fds[0];
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123 }
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124
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125 proc_pid = ::fork ();
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126
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127 if (proc_pid == 0)
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128 {
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129 octave_close_wrapper (parent_end);
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130
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131 if (child_end != child_std_end)
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132 {
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133 octave_dup2_wrapper (child_end, child_std_end);
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134 octave_close_wrapper (child_end);
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135 }
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136
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137 while (octave_procbuf_list)
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138 {
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139 FILE *fp = octave_procbuf_list->f;
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140
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141 if (fp)
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142 {
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143 std::fclose (fp);
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144 fp = nullptr;
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145 }
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146
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147 octave_procbuf_list = octave_procbuf_list->next;
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148 }
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149
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150 execl (SHELL_PATH, "sh", "-c", command, static_cast<void *> (nullptr));
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151
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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152 exit (127);
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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153 }
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154
21910
4d723ba06b4a provide wrappers for some unistd.h functions
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155 octave_close_wrapper (child_end);
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156
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157 if (proc_pid < 0)
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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158 {
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159 octave_close_wrapper (parent_end);
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160 return nullptr;
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161 }
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162
23450
855122b993da maint: Wrap tertiary operator in parentheses "(COND ? x : y)".
Rik <rik@octave.org>
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163 f = (::fdopen (parent_end, (mode & std::ios::in) ? "r" : "w"));
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164
3649
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165 if (mode & std::ios::out)
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166 ::setvbuf (f, nullptr, _IOLBF, BUFSIZ);
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167
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168 open_p = true;
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169
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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170 next = octave_procbuf_list;
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171 octave_procbuf_list = this;
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172
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173 return this;
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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174
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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175 #else
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176
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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177 return 0;
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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178
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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179 #endif
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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180 }
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181
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diff changeset
182 octave_procbuf *
0b6b55fd0a5c [project @ 2000-03-23 09:16:36 by jwe]
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183 octave_procbuf::close (void)
2094
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184 {
6096
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diff changeset
185 #if defined (__CYGWIN__) || defined (__MINGW32__) || defined (_MSC_VER)
4472
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186
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parents: 4233
diff changeset
187 if (f)
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188 {
25655
be7ba25bb5bf Fix Windows cross-build after 85c3e315bd43.
Markus Mützel <markus.muetzel@gmx.de>
parents: 25438
diff changeset
189 wstatus = octave::pclose (f);
4472
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diff changeset
190 f = 0;
f52db9e1296a [project @ 2003-07-29 18:03:03 by jwe]
jwe
parents: 4233
diff changeset
191 }
f52db9e1296a [project @ 2003-07-29 18:03:03 by jwe]
jwe
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diff changeset
192
f52db9e1296a [project @ 2003-07-29 18:03:03 by jwe]
jwe
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diff changeset
193 open_p = false;
f52db9e1296a [project @ 2003-07-29 18:03:03 by jwe]
jwe
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194
f52db9e1296a [project @ 2003-07-29 18:03:03 by jwe]
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diff changeset
195 return this;
11586
12df7854fa7c strip trailing whitespace from source files
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diff changeset
196
22264
9b78fda78300 fix build failure for --without-z (bug #48757)
John W. Eaton <jwe@octave.org>
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diff changeset
197 #elif defined (HAVE_UNISTD_H)
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198
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diff changeset
199 if (f)
9add655e8b8c [project @ 2000-03-24 11:58:50 by jwe]
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diff changeset
200 {
9add655e8b8c [project @ 2000-03-24 11:58:50 by jwe]
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diff changeset
201 pid_t wait_pid;
2094
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202
3644
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diff changeset
203 int status = -1;
9add655e8b8c [project @ 2000-03-24 11:58:50 by jwe]
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diff changeset
204
9add655e8b8c [project @ 2000-03-24 11:58:50 by jwe]
jwe
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diff changeset
205 for (octave_procbuf **ptr = &octave_procbuf_list;
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diff changeset
206 *ptr != nullptr;
10315
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diff changeset
207 ptr = &(*ptr)->next)
57a59eae83cc untabify src C++ source files
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diff changeset
208 {
57a59eae83cc untabify src C++ source files
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diff changeset
209 if (*ptr == this)
57a59eae83cc untabify src C++ source files
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diff changeset
210 {
57a59eae83cc untabify src C++ source files
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diff changeset
211 *ptr = (*ptr)->next;
57a59eae83cc untabify src C++ source files
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diff changeset
212 status = 0;
57a59eae83cc untabify src C++ source files
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diff changeset
213 break;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
214 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10182
diff changeset
215 }
2094
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diff changeset
216
21942
aab79a1885cc limit gnulib headers to liboctave/wrappers directory
John W. Eaton <jwe@octave.org>
parents: 21910
diff changeset
217 if (status == 0 && std::fclose (f) == 0)
10315
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diff changeset
218 {
57a59eae83cc untabify src C++ source files
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parents: 10182
diff changeset
219 using namespace std;
3531
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jwe
parents: 3503
diff changeset
220
10315
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diff changeset
221 do
57a59eae83cc untabify src C++ source files
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diff changeset
222 {
21727
e0da98857c19 rename octave::syscalls namespace to octave::sys
John W. Eaton <jwe@octave.org>
parents: 21724
diff changeset
223 wait_pid = octave::sys::waitpid (proc_pid, &wstatus, 0);
10315
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diff changeset
224 }
57a59eae83cc untabify src C++ source files
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parents: 10182
diff changeset
225 while (wait_pid == -1 && errno == EINTR);
57a59eae83cc untabify src C++ source files
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diff changeset
226 }
3644
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diff changeset
227
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diff changeset
228 f = nullptr;
3631
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diff changeset
229 }
2094
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diff changeset
230
3631
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diff changeset
231 open_p = false;
2094
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diff changeset
232
3631
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diff changeset
233 return this;
2094
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parents:
diff changeset
234
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
jwe
parents:
diff changeset
235 #else
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
jwe
parents:
diff changeset
236
3631
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diff changeset
237 return 0;
2094
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
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parents:
diff changeset
238
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
jwe
parents:
diff changeset
239 #endif
a23645b0364e [project @ 1996-04-28 09:00:07 by jwe]
jwe
parents:
diff changeset
240 }