mcs/class/Mono.Posix/Mono.Unix/UnixEnvironment.cs

   1 //
   2 // Mono.Unix/UnixEnvironment.cs
   3 //
   4 // Authors:
   5 //   Jonathan Pryor (jonpryor@vt.edu)
   6 //
   7 // (C) 2004 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 /* static */ class UnixEnvironment
  37         {
  38                 private UnixEnvironment () {}
  39
  40                 public static string CurrentDirectory {
  41                         get {
  42                                 return UnixDirectory.GetCurrentDirectory ();
  43                         }
  44                         set {
  45                                 UnixDirectory.SetCurrentDirectory (value);
  46                         }
  47                 }
  48
  49                 public static string MachineName {
  50                         get {
  51                                 StringBuilder buf = new StringBuilder (8);
  52                                 int r = 0;
  53                                 Error e = (Error) 0;
  54                                 do {
  55                                         buf.Capacity *= 2;
  56                                         r = Syscall.gethostname (buf);
  57                                 } while (r == (-1) && ((e = Syscall.GetLastError()) == Error.EINVAL) ||
  58                                                 (e == Error.ENAMETOOLONG));
  59                                 if (r == (-1))
  60                                         UnixMarshal.ThrowExceptionForLastError ();
  61                                 return buf.ToString ();
  62                         }
  63                         set {
  64                                 Syscall.sethostname (value);
  65                         }
  66                 }
  67
  68                 [CLSCompliant (false)]
  69                 public static long GetConfigurationValue (SysConf name)
  70                 {
  71                         long r = Syscall.sysconf (name);
  72                         if (r == -1 && Syscall.GetLastError() == Error.EINVAL)
  73                                 UnixMarshal.ThrowExceptionForLastError ();
  74                         return r;
  75                 }
  76
  77                 [CLSCompliant (false)]
  78                 public static string GetConfigurationString (ConfStr name)
  79                 {
  80                         ulong len = Syscall.confstr (name, null, 0);
  81                         if (len == 0)
  82                                 return "";
  83                         StringBuilder buf = new StringBuilder ((int) len+1);
  84                         len = Syscall.confstr (name, buf, len);
  85                         return buf.ToString ();
  86                 }
  87
  88                 public static void SetNiceValue (int inc)
  89                 {
  90                         int r = Syscall.nice (inc);
  91                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
  92                 }
  93
  94                 [CLSCompliant (false)]
  95                 [Obsolete ("Use UserId")]
  96                 public static uint User {
  97                         get {return UnixUser.GetCurrentUserId ();}
  98                 }
  99
 100                 [CLSCompliant (false)]
 101                 public static uint UserId {
 102                         get {return UnixUser.GetCurrentUserId ();}
 103                 }
 104
 105                 public static string UserName {
 106                         get {return UnixUser.GetCurrentUserName();}
 107                 }
 108
 109                 public static string Login {
 110                         get {return UnixUser.GetLogin ();}
 111                 }
 112
 113                 public static int CreateSession ()
 114                 {
 115                         return Syscall.setsid ();
 116                 }
 117
 118                 public static void SetProcessGroup ()
 119                 {
 120                         int r = Syscall.setpgrp ();
 121                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
 122                 }
 123
 124                 public static int GetProcessGroup ()
 125                 {
 126                         return Syscall.getpgrp ();
 127                 }
 128
 129                 [CLSCompliant (false)]
 130                 [Obsolete ("Use GetSupplementaryGroupIds")]
 131                 public static uint[] GetSupplementaryGroups ()
 132                 {
 133                         return GetSupplementaryGroupIds ();
 134                 }
 135
 136                 [CLSCompliant (false)]
 137                 public static uint[] GetSupplementaryGroupIds ()
 138                 {
 139                         int ngroups = Syscall.getgroups (0, new uint[]{});
 140                         if (ngroups == -1)
 141                                 UnixMarshal.ThrowExceptionForLastError ();
 142                         uint[] groups = new uint[ngroups];
 143                         int r = Syscall.getgroups (groups);
 144                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
 145                         return groups;
 146                 }
 147
 148                 [CLSCompliant (false)]
 149                 [Obsolete ("Use SetSupplementaryGroupIds")]
 150                 public static void SetSupplementaryGroups (uint[] list)
 151                 {
 152                         SetSupplementaryGroupIds (list);
 153                 }
 154
 155                 [CLSCompliant (false)]
 156                 public static void SetSupplementaryGroupIds (uint[] list)
 157                 {
 158                         int r = Syscall.setgroups (list);
 159                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
 160                 }
 161
 162                 public static int GetParentProcessId ()
 163                 {
 164                         return Syscall.getppid ();
 165                 }
 166
 167                 public static UnixProcess GetParentProcess ()
 168                 {
 169                         return new UnixProcess (GetParentProcessId ());
 170                 }
 171
 172                 public static string[] GetUserShells ()
 173                 {
 174                         ArrayList shells = new ArrayList ();
 175
 176                         lock (Syscall.usershell_lock) {
 177                                 try {
 178                                         Syscall.setusershell ();
 179                                         string shell;
 180                                         while ((shell = Syscall.getusershell ()) != null)
 181                                                 shells.Add (shell);
 182                                 }
 183                                 finally {
 184                                         Syscall.endusershell ();
 185                                 }
 186                         }
 187
 188                         return (string[]) shells.ToArray (typeof(string));
 189                 }
 190         }
 191 }
 192
 193 // vim: noexpandtab