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annotate libinterp/corefcn/getgrent.cc @ 33617:ec2635a02328 bytecode-interpreter tip

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maint: Merge default to bytecode-interpreter.
author Markus Mützel <markus.muetzel@gmx.de>
date Tue, 21 May 2024 18:29:03 +0200
parents 2e484f9f1f18
children
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2024 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 <string>
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31
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32 #include <sys/types.h>
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33
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34 #include "oct-group.h"
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35
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36 #include "defun.h"
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37 #include "error.h"
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38 #include "errwarn.h"
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39 #include "oct-map.h"
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40 #include "ov.h"
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41 #include "ovl.h"
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42 #include "utils.h"
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43
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44 OCTAVE_BEGIN_NAMESPACE(octave)
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45
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46 // Group file functions. (Why not?)
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47
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48 static octave_value
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49 mk_gr_map (const sys::group& gr)
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50 {
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51 if (gr)
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52 {
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53 octave_scalar_map m;
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54
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55 m.assign ("name", gr.name ());
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56 m.assign ("passwd", gr.passwd ());
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57 m.assign ("gid", static_cast<double> (gr.gid ()));
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58 m.assign ("mem", octave_value (gr.mem ()));
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59
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60 return octave_value (m);
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61 }
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62 else
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63 return octave_value (0);
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64 }
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65
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66 DEFUN (getgrent, args, ,
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67 doc: /* -*- texinfo -*-
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68 @deftypefn {} {@var{grp_struct} =} getgrent ()
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69 Return an entry from the group database, opening it if necessary.
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70
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71 Once the end of data has been reached, @code{getgrent} returns 0.
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72 @seealso{setgrent, endgrent}
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73 @end deftypefn */)
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74 {
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75 if (args.length () != 0)
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76 print_usage ();
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77
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78 std::string msg;
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79
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80 // sys::group::getgrent may set msg.
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81 octave_value val = mk_gr_map (sys::group::getgrent (msg));
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82
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83 return ovl (val, msg);
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84 }
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85
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86 DEFUN (getgrgid, args, ,
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87 doc: /* -*- texinfo -*-
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88 @deftypefn {} {@var{grp_struct} =} getgrgid (@var{gid}).
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89 Return the first entry from the group database with the group ID
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90 @var{gid}.
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91
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92 If the group ID does not exist in the database, @code{getgrgid} returns 0.
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93 @seealso{getgrnam}
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94 @end deftypefn */)
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95 {
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96 if (args.length () != 1)
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97 print_usage ();
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98
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99 double dval = args(0).double_value ();
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100
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101 if (math::x_nint (dval) != dval)
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102 error ("getgrgid: GID must be an integer");
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103
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104 gid_t gid = static_cast<gid_t> (dval);
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105
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106 std::string msg;
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107
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108 // sys::group::getgrgid may set msg.
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109 octave_value val = mk_gr_map (sys::group::getgrgid (gid, msg));
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110
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111 return ovl (val, msg);
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112 }
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113
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114 DEFUN (getgrnam, args, ,
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115 doc: /* -*- texinfo -*-
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116 @deftypefn {} {@var{grp_struct} =} getgrnam (@var{name})
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117 Return the first entry from the group database with the group name
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118 @var{name}.
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119
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120 If the group name does not exist in the database, @code{getgrnam} returns 0.
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121 @seealso{getgrgid}
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122 @end deftypefn */)
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123 {
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124 if (args.length () != 1)
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125 print_usage ();
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126
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127 std::string s = args(0).string_value ();
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128
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129 std::string msg;
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130
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131 // sys::group::getgrnam may set msg.
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132 octave_value val = mk_gr_map (sys::group::getgrnam (s.c_str (), msg));
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133
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134 return ovl (val, msg);
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135 }
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136
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137 DEFUN (setgrent, args, ,
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138 doc: /* -*- texinfo -*-
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139 @deftypefn {} {[@var{status}, @var{msg}] =} setgrent ()
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140 Return the internal pointer to the beginning of the group database.
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141 @seealso{getgrent, endgrent}
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142 @end deftypefn */)
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143 {
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144 if (args.length () != 0)
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145 print_usage ();
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146
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147 std::string msg;
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148
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149 // sys::group::setgrent may set msg.
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150 int status = sys::group::setgrent (msg);
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151
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152 return ovl (static_cast<double> (status), msg);
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153 }
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154
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155 DEFUN (endgrent, args, ,
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156 doc: /* -*- texinfo -*-
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157 @deftypefn {} {[@var{status}, @var{msg}] =} endgrent ()
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158 Close the group database.
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159 @seealso{getgrent, setgrent}
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160 @end deftypefn */)
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161 {
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162 if (args.length () != 0)
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163 print_usage ();
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164
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165 std::string msg;
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166
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167 // sys::group::endgrent may set msg.
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168 int status = sys::group::endgrent (msg);
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169
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170 return ovl (static_cast<double> (status), msg);
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171 }
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172
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173 OCTAVE_END_NAMESPACE(octave)