1 // 2 // Copyright (c) 2013-2017 Carsten Sonne Larsen <cs@innolan.net> 3 // 4 // Permission is hereby granted, free of charge, to any person obtaining a copy 5 // of this software and associated documentation files (the "Software"), to deal 6 // in the Software without restriction, including without limitation the rights 7 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 // copies of the Software, and to permit persons to whom the Software is 9 // furnished to do so, subject to the following conditions: 10 // 11 // The above copyright notice and this permission notice shall be included in 12 // all copies or substantial portions of the Software. 13 // 14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 20 // THE SOFTWARE. 21 22 using System; 23 using Mono.Unix.Native; 24 25 namespace Ntp.Common.IO 26 { 27 public static class Permission 28 { ChangeFileMode(string file, uint mode)29 public static bool ChangeFileMode(string file, uint mode) 30 { 31 // Changing file mode is only supported on Unix platforms 32 if (Environment.OSVersion.Platform != PlatformID.Unix) 33 return true; 34 35 var permissions = NativeConvert.FromOctalPermissionString(mode.ToString()); 36 return Syscall.chmod(file, permissions) == 0; 37 } 38 ChangeFileOwner(string file, uint user, uint? group)39 public static bool ChangeFileOwner(string file, uint user, uint? group) 40 { 41 // Changing file owner is only supported on Unix platforms 42 if (Environment.OSVersion.Platform != PlatformID.Unix) 43 return true; 44 45 return Syscall.chown(file, user, group ?? unchecked((uint) -1)) == 0; 46 } 47 GetGroupId(string groupName)48 public static uint? GetGroupId(string groupName) 49 { 50 // Group IDs are only supported on Unix platforms 51 if (Environment.OSVersion.Platform != PlatformID.Unix) 52 return 0; 53 54 var gr = Syscall.getgrnam(groupName); 55 return gr?.gr_gid; 56 } 57 GetUserId(string userName)58 public static uint? GetUserId(string userName) 59 { 60 // User IDs are only supported on Unix platforms 61 if (Environment.OSVersion.Platform != PlatformID.Unix) 62 return 0; 63 64 var pw = Syscall.getpwnam(userName); 65 return pw?.pw_uid; 66 } 67 SetUserId(uint userId)68 public static bool SetUserId(uint userId) 69 { 70 // Setting user ID is only supported on Unix platforms 71 if (Environment.OSVersion.Platform != PlatformID.Unix) 72 return true; 73 74 try 75 { 76 Syscall.setuid(userId); 77 } 78 catch 79 { 80 return false; 81 } 82 83 return true; 84 } 85 } 86 }