class/Mono.Posix/Mono.Unix/UnixGroupInfo.cs

   1 //
   2 // Mono.Unix/UnixGroupInfo.cs
   3 //
   4 // Authors:
   5 //   Jonathan Pryor (jonpryor@vt.edu)
   6 //
   7 // (C) 2004-2005 Jonathan Pryor
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections;
  31 using System.Text;
  32 using Mono.Unix;
  33
  34 namespace Mono.Unix {
  35
  36         public sealed class UnixGroupInfo
  37         {
  38                 private Native.Group group;
  39
  40                 public UnixGroupInfo (string group)
  41                 {
  42                         this.group = new Native.Group ();
  43                         Native.Group gr;
  44                         int r = Native.Syscall.getgrnam_r (group, this.group, out gr);
  45                         if (r != 0 || gr == null)
  46                                 throw new ArgumentException (Locale.GetText ("invalid group name"), "group");
  47                 }
  48
  49                 public UnixGroupInfo (long group)
  50                 {
  51                         this.group = new Native.Group ();
  52                         Native.Group gr;
  53                         int r = Native.Syscall.getgrgid_r (Convert.ToUInt32 (group), this.group, out gr);
  54                         if (r != 0 || gr == null)
  55                                 throw new ArgumentException (Locale.GetText ("invalid group id"), "group");
  56                 }
  57
  58                 public UnixGroupInfo (Native.Group group)
  59                 {
  60                         this.group = CopyGroup (group);
  61                 }
  62
  63                 private static Native.Group CopyGroup (Native.Group group)
  64                 {
  65                         Native.Group g = new Native.Group ();
  66
  67                         g.gr_gid    = group.gr_gid;
  68                         g.gr_mem    = group.gr_mem;
  69                         g.gr_name   = group.gr_name;
  70                         g.gr_passwd = group.gr_passwd;
  71
  72                         return g;
  73                 }
  74
  75                 public string GroupName {
  76                         get {return group.gr_name;}
  77                 }
  78
  79                 public string Password {
  80                         get {return group.gr_passwd;}
  81                 }
  82
  83                 public long GroupId {
  84                         get {return group.gr_gid;}
  85                 }
  86
  87                 public UnixUserInfo[] GetMembers ()
  88                 {
  89                         ArrayList members = new ArrayList (group.gr_mem.Length);
  90                         for (int i = 0; i < group.gr_mem.Length; ++i) {
  91                                 try {
  92                                         members.Add (new UnixUserInfo (group.gr_mem [i]));
  93                                 } catch (ArgumentException) {
  94                                         // ignore invalid users
  95                                 }
  96                         }
  97                         return (UnixUserInfo[]) members.ToArray (typeof (UnixUserInfo));
  98                 }
  99
 100                 public string[] GetMemberNames ()
 101                 {
 102                         return (string[]) group.gr_mem.Clone ();
 103                 }
 104
 105                 public override int GetHashCode ()
 106                 {
 107                         return group.GetHashCode ();
 108                 }
 109
 110                 public override bool Equals (object obj)
 111                 {
 112                         if (obj == null || GetType () != obj.GetType())
 113                                 return false;
 114                         return group.Equals (((UnixGroupInfo) obj).group);
 115                 }
 116
 117                 public override string ToString ()
 118                 {
 119                         return group.ToString();
 120                 }
 121
 122                 public Native.Group ToGroup ()
 123                 {
 124                         return CopyGroup (group);
 125                 }
 126
 127                 public static UnixGroupInfo[] GetLocalGroups ()
 128                 {
 129                         ArrayList entries = new ArrayList ();
 130                         lock (Native.Syscall.grp_lock) {
 131                                 if (Native.Syscall.setgrent () != 0)
 132                                         UnixMarshal.ThrowExceptionForLastError ();
 133                                 try {
 134                                         Native.Group g;
 135                                         while ((g = Native.Syscall.getgrent()) != null)
 136                                                 entries.Add (new UnixGroupInfo (g));
 137                                         if (Native.Syscall.GetLastError() != (Native.Errno) 0)
 138                                                 UnixMarshal.ThrowExceptionForLastError ();
 139                                 }
 140                                 finally {
 141                                         Native.Syscall.endgrent ();
 142                                 }
 143                         }
 144                         return (UnixGroupInfo[]) entries.ToArray (typeof(UnixGroupInfo));
 145                 }
 146         }
 147 }
 148
 149 // vim: noexpandtab