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annotate libinterp/corefcn/getgrent.cc @ 20597:bc6daa38ff50

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eliminate more simple uses of error_state * graphics.cc: Eliminate simple uses of error_state.
author John W. Eaton <jwe@octave.org>
date Tue, 06 Oct 2015 14:47:41 -0400
parents f90c8372b7ba
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 1996-2015 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 3 of the License, or (at your
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10 option) any 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, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <string>
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28
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29 #include <sys/types.h>
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30
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31 #include "oct-group.h"
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32
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33 #include "defun.h"
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34 #include "error.h"
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35 #include "gripes.h"
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36 #include "oct-map.h"
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37 #include "ov.h"
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38 #include "oct-obj.h"
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39 #include "utils.h"
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40
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41 // Group file functions. (Why not?)
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42
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43 static octave_value
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44 mk_gr_map (const octave_group& gr)
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45 {
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46 octave_value retval;
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47
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48 if (gr)
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49 {
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50 octave_scalar_map m;
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51
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52 m.assign ("name", gr.name ());
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53 m.assign ("passwd", gr.passwd ());
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54 m.assign ("gid", static_cast<double> (gr.gid ()));
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55 m.assign ("mem", octave_value (gr.mem ()));
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56
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57 retval = m;
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58 }
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59 else
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60 retval = 0;
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61
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62 return retval;
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63 }
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64
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65 DEFUN (getgrent, args, ,
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66 "-*- texinfo -*-\n\
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67 @deftypefn {Built-in Function} {@var{grp_struct} =} getgrent ()\n\
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68 Return an entry from the group database, opening it if necessary.\n\
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69 \n\
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70 Once the end of data has been reached, @code{getgrent} returns 0.\n\
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71 @seealso{setgrent, endgrent}\n\
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72 @end deftypefn")
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73 {
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74 octave_value_list retval;
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75
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76 retval(1) = std::string ();
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77 retval(0) = 0;
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78
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79 int nargin = args.length ();
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80
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81 if (nargin == 0)
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82 {
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83 std::string msg;
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84
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85 retval(1) = msg;
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86 retval(0) = mk_gr_map (octave_group::getgrent (msg));
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87 }
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88 else
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89 print_usage ();
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90
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91 return retval;
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92 }
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93
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94 DEFUN (getgrgid, args, ,
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95 "-*- texinfo -*-\n\
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96 @deftypefn {Built-in Function} {@var{grp_struct} =} getgrgid (@var{gid}).\n\
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97 Return the first entry from the group database with the group ID\n\
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98 @var{gid}.\n\
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99 \n\
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100 If the group ID does not exist in the database, @code{getgrgid} returns 0.\n\
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101 @seealso{getgrnam}\n\
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102 @end deftypefn")
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103 {
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104 octave_value_list retval;
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105
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106 retval(1) = std::string ();
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107 retval(0) = 0;
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108
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109 int nargin = args.length ();
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110
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111 if (nargin == 1)
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112 {
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113 double dval = args(0).double_value ();
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114
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115 if (D_NINT (dval) == dval)
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116 {
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117 gid_t gid = static_cast<gid_t> (dval);
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118
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119 std::string msg;
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120
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121 retval(1) = msg;
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122 retval(0) = mk_gr_map (octave_group::getgrgid (gid, msg));
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123 }
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124 else
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125 error ("getgrgid: GID must be an integer");
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126 }
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127 else
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128 print_usage ();
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129
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130 return retval;
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131 }
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132
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133 DEFUN (getgrnam, args, ,
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134 "-*- texinfo -*-\n\
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135 @deftypefn {Built-in Function} {@var{grp_struct} =} getgrnam (@var{name})\n\
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136 Return the first entry from the group database with the group name\n\
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137 @var{name}.\n\
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138 \n\
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139 If the group name does not exist in the database, @code{getgrnam} returns 0.\n\
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140 @seealso{getgrgid}\n\
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141 @end deftypefn")
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142 {
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143 octave_value_list retval;
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144
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145 retval(1) = std::string ();
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146 retval(0) = 0;
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147
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148 int nargin = args.length ();
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149
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150 if (nargin == 1)
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151 {
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152 std::string s = args(0).string_value ();
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153
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154 std::string msg;
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155
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156 retval(1) = msg;
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157 retval(0) = mk_gr_map (octave_group::getgrnam (s.c_str (), msg));
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158 }
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159 else
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160 print_usage ();
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161
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162 return retval;
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163 }
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164
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165 DEFUN (setgrent, args, ,
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166 "-*- texinfo -*-\n\
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167 @deftypefn {Built-in Function} {} setgrent ()\n\
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168 Return the internal pointer to the beginning of the group database.\n\
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169 @seealso{getgrent, endgrent}\n\
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170 @end deftypefn")
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171 {
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172 octave_value_list retval;
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173
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174 retval(1) = std::string ();
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175 retval(0) = -1.0;
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176
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177 int nargin = args.length ();
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178
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179 if (nargin == 0)
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180 {
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181 std::string msg;
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182
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183 retval(1) = msg;
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184 retval(0) = static_cast<double> (octave_group::setgrent (msg));
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185 }
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186 else
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187 print_usage ();
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188
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189 return retval;
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190 }
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191
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192 DEFUN (endgrent, args, ,
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193 "-*- texinfo -*-\n\
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194 @deftypefn {Built-in Function} {} endgrent ()\n\
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195 Close the group database.\n\
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196 @seealso{getgrent, setgrent}\n\
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197 @end deftypefn")
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198 {
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199 octave_value_list retval;
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200
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201 retval(1) = std::string ();
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202 retval(0) = -1.0;
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203
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204 int nargin = args.length ();
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205
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206 if (nargin == 0)
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207 {
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208 std::string msg;
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209
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Rik <octave@nomad.inbox5.com>
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210 retval(1) = msg;
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211 retval(0) = static_cast<double> (octave_group::endgrent (msg));
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212 }
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213 else
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214 print_usage ();
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215
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216 return retval;
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217 }