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annotate libinterp/corefcn/getpwent.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-password.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 // Password file functions. (Why not?)
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47
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48 static octave_value
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49 mk_pw_map (const sys::password& pw)
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50 {
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51 octave_value retval;
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52
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53 if (pw)
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54 {
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55 octave_scalar_map m;
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56
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57 m.assign ("name", pw.name ());
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58 m.assign ("passwd", pw.passwd ());
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59 m.assign ("uid", static_cast<double> (pw.uid ()));
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60 m.assign ("gid", static_cast<double> (pw.gid ()));
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61 m.assign ("gecos", pw.gecos ());
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62 m.assign ("dir", pw.dir ());
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63 m.assign ("shell", pw.shell ());
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64
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65 return octave_value (m);
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66 }
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67 else
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68 return octave_value (0);
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69 }
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70
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71 DEFUN (getpwent, args, ,
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72 doc: /* -*- texinfo -*-
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73 @deftypefn {} {@var{pw_struct} =} getpwent ()
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74 Return a structure containing an entry from the password database,
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75 opening it if necessary.
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76
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77 Once the end of the data has been reached, @code{getpwent} returns 0.
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78 @seealso{setpwent, endpwent}
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79 @end deftypefn */)
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80 {
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81 if (args.length () != 0)
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82 print_usage ();
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83
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84 std::string msg;
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85
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86 // sys::password::getpwent may set msg.
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87 octave_value val = mk_pw_map (sys::password::getpwent (msg));
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88
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89 return ovl (val, msg);
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90 }
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91
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92 DEFUN (getpwuid, args, ,
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93 doc: /* -*- texinfo -*-
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94 @deftypefn {} {@var{pw_struct} =} getpwuid (@var{uid}).
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95 Return a structure containing the first entry from the password database
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96 with the user ID @var{uid}.
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97
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98 If the user ID does not exist in the database, @code{getpwuid} returns 0.
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99 @seealso{getpwnam}
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100 @end deftypefn */)
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101 {
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102 if (args.length () != 1)
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103 print_usage ();
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104
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105 double dval = args(0).double_value ();
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106
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107 if (math::x_nint (dval) != dval)
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108 error ("getpwuid: UID must be an integer");
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109
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110 uid_t uid = static_cast<uid_t> (dval);
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111
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112 std::string msg;
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113
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114 // sys::password::getpwuid may set msg.
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115 octave_value val = mk_pw_map (sys::password::getpwuid (uid, msg));
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116
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117 return ovl (val, msg);
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118 }
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119
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120 DEFUN (getpwnam, args, ,
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121 doc: /* -*- texinfo -*-
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122 @deftypefn {} {@var{pw_struct} =} getpwnam (@var{name})
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123 Return a structure containing the first entry from the password database
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124 with the user name @var{name}.
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125
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126 If the user name does not exist in the database, @code{getpwname} returns 0.
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127 @seealso{getpwuid}
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128 @end deftypefn */)
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129 {
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130 if (args.length () != 1)
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131 print_usage ();
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132
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133 std::string s = args(0).string_value ();
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134
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135 std::string msg;
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136
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137 // sys::password::getpwnam may set msg.
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138 octave_value val = mk_pw_map (sys::password::getpwnam (s, msg));
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139
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140 return ovl (val, msg);
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141 }
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142
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143 DEFUN (setpwent, args, ,
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144 doc: /* -*- texinfo -*-
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145 @deftypefn {} {[@var{status}, @var{msg}] =} setpwent ()
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146 Return the internal pointer to the beginning of the password database.
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147 @seealso{getpwent, endpwent}
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148 @end deftypefn */)
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149 {
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150 if (args.length () != 0)
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151 print_usage ();
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152
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153 std::string msg;
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154
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155 // sys::password::setpwent may set msg.
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156 int status = sys::password::setpwent (msg);
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157
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158 return ovl (static_cast<double> (status), msg);
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159 }
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160
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161 DEFUN (endpwent, args, ,
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162 doc: /* -*- texinfo -*-
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163 @deftypefn {} {[@var{status}, @var{msg}] =} endpwent ()
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164 Close the password database.
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165 @seealso{getpwent, setpwent}
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166 @end deftypefn */)
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167 {
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168 if (args.length () != 0)
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169 print_usage ();
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170
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171 std::string msg;
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172
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173 // sys::password::endpwent may set msg.
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174 int status = sys::password::endpwent (msg);
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175
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176 return ovl (static_cast<double> (status), msg);
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177 }
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178
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179 OCTAVE_END_NAMESPACE(octave)