Escape per CS8981 throughout the repo.

src/libraries/Common/src/Interop/FreeBSD/Interop.Process.GetProcInfo.cs

@@ -50,22 +50,22 @@ internal struct gid_t
             public uint id;
         }
         [StructLayout(LayoutKind.Sequential)]
-        public struct timeval
+        public struct @timeval
         {
             public IntPtr tv_sec;
             public IntPtr tv_usec;
         }
 
         [StructLayout(LayoutKind.Sequential)]
-        private struct vnode
+        private struct @vnode
         {
             public long tv_sec;
             public long tv_usec;
         }
 
         // sys/resource.h
         [StructLayout(LayoutKind.Sequential)]
-        internal struct rusage
+        internal struct @rusage
         {
             public timeval ru_utime;        /* user time used */
             public timeval ru_stime;        /* system time used */
@@ -164,9 +164,9 @@ public unsafe struct kinfo_proc
             public int ki_numthreads;                   /* XXXKSE number of threads in total */
             public int ki_tid;                          /* XXXKSE thread id */
             private fixed byte ki_pri[4];               /* process priority */
-            public rusage ki_rusage;                    /* process rusage statistics */
+            public rusage ki_rusage;                    /* process @rusage statistics */
             /* XXX - most fields in ki_rusage_ch are not (yet) filled in */
-            private rusage ki_rusage_ch;                /* rusage of children processes */
+            private rusage ki_rusage_ch;                /* @rusage of children processes */
             private void* ki_pcb;                       /* kernel virtual addr of pcb */
             private void* ki_kstack;                    /* kernel virtual addr of stack */
             private void* ki_udata;                     /* User convenience pointer */

src/libraries/Common/src/Interop/Linux/procfs/Interop.ProcFsStat.ParseMapModules.cs

@@ -11,7 +11,7 @@
 
 internal static partial class Interop
 {
-    internal static partial class procfs
+    internal static partial class @procfs
     {
         private const string MapsFileName = "/maps";
 

src/libraries/Common/src/Interop/OSX/Interop.Libraries.cs

@@ -8,13 +8,12 @@ internal static partial class Libraries
         internal const string CoreFoundationLibrary = "/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation";
         internal const string CoreServicesLibrary = "/System/Library/Frameworks/CoreServices.framework/CoreServices";
         internal const string CFNetworkLibrary = "/System/Library/Frameworks/CFNetwork.framework/CFNetwork";
-        internal const string libobjc = "/usr/lib/libobjc.dylib";
-        internal const string libproc = "/usr/lib/libproc.dylib";
+        internal const string @libobjc = "/usr/lib/libobjc.dylib";
+        internal const string @libproc = "/usr/lib/libproc.dylib";
         internal const string Odbc32 = "libodbc.2.dylib";
         internal const string OpenLdap = "libldap.dylib";
         internal const string SystemConfigurationLibrary = "/System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration";
         internal const string AppleCryptoNative = "libSystem.Security.Cryptography.Native.Apple";
         internal const string MsQuic = "libmsquic.dylib";
-        internal const string libc = "libc";
     }
 }

src/libraries/Common/src/Interop/OSX/Interop.libc.cs

@@ -6,7 +6,7 @@
 
 internal static partial class Interop
 {
-    internal static partial class libc
+    internal static partial class @libc
     {
         [StructLayout(LayoutKind.Sequential)]
         internal struct AttrList

src/libraries/Common/src/Interop/OSX/Interop.libobjc.cs

@@ -6,7 +6,7 @@
 
 internal static partial class Interop
 {
-    internal static partial class libobjc
+    internal static partial class @libobjc
     {
         [StructLayout(LayoutKind.Sequential)]
         private struct NSOperatingSystemVersion

src/libraries/Common/src/Interop/OSX/Interop.libproc.GetProcessInfoById.cs

@@ -8,7 +8,7 @@
 
 internal static partial class Interop
 {
-    internal static partial class libproc
+    internal static partial class @libproc
     {
         // Constants from sys\param.h
         private const int MAXCOMLEN = 16;

src/libraries/Common/src/Interop/OSX/Interop.libproc.cs

@@ -11,7 +11,7 @@
 
 internal static partial class Interop
 {
-    internal static partial class libproc
+    internal static partial class @libproc
     {
         // Constants from sys\param.h
         private const int MAXPATHLEN = 1024;
@@ -350,9 +350,9 @@ internal static unsafe string proc_pidpath(int pid)
         }
 
         /// <summary>
-        /// Gets the rusage information for the process identified by the PID
+        /// Gets the @rusage information for the process identified by the PID
         /// </summary>
-        /// <param name="pid">The process to retrieve the rusage for</param>
+        /// <param name="pid">The process to retrieve the @rusage for</param>
         /// <param name="flavor">Specifies the type of struct that is passed in to <paramref>buffer</paramref>. Should be RUSAGE_INFO_V3 to specify a rusage_info_v3 struct.</param>
         /// <param name="buffer">A buffer to be filled with rusage_info data</param>
         /// <returns>Returns 0 on success; on fail, -1 and errno is set with the error code</returns>
@@ -363,9 +363,9 @@ private static unsafe partial int proc_pid_rusage(
             rusage_info_v3* buffer);
 
         /// <summary>
-        /// Gets the rusage information for the process identified by the PID
+        /// Gets the @rusage information for the process identified by the PID
         /// </summary>
-        /// <param name="pid">The process to retrieve the rusage for</param>
+        /// <param name="pid">The process to retrieve the @rusage for</param>
         /// <returns>On success, returns a struct containing info about the process; on
         /// failure or when the caller doesn't have permissions to the process, throws a Win32Exception
         /// </returns>
@@ -379,7 +379,7 @@ internal static unsafe rusage_info_v3 proc_pid_rusage(int pid)
 
             rusage_info_v3 info = default;
 
-            // Get the PIDs rusage info
+            // Get the PIDs @rusage info
             int result = proc_pid_rusage(pid, RUSAGE_INFO_V3, &info);
             if (result < 0)
             {

src/libraries/Common/src/Interop/SunOS/procfs/Interop.ProcFsStat.TryReadProcessStatusInfo.cs

@@ -5,7 +5,7 @@
 
 internal static partial class Interop
 {
-    internal static partial class procfs
+    internal static partial class @procfs
     {
         /// <summary>
         /// Attempts to get status info for the specified process ID.

src/libraries/Common/src/Interop/Unix/Interop.Libraries.cs

@@ -5,7 +5,7 @@ internal static partial class Interop
 {
     internal static partial class Libraries
     {
-        internal const string Libc = "libc";
+        internal const string @libc = "libc";
 
         // Shims
         internal const string SystemNative = "libSystem.Native";

src/libraries/Common/src/Interop/Unix/libc/Interop.GetParentPid.cs

@@ -5,9 +5,9 @@
 
 internal static partial class Interop
 {
-    internal static partial class libc
+    internal static partial class @libc
     {
-        [GeneratedDllImport(Libraries.Libc, EntryPoint = "getppid")]
+        [GeneratedDllImport(Libraries.libc, EntryPoint = "getppid")]
         internal static partial int GetParentPid();
     }
 }

src/libraries/Common/tests/TestUtilities/System/PlatformDetection.Unix.cs

@@ -51,7 +51,7 @@ public static partial class PlatformDetection
         public static bool IsNotFedoraOrRedHatFamily => !IsFedora && !IsRedHatFamily;
         public static bool IsNotDebian10 => !IsDebian10;
 
-        public static bool IsSuperUser => IsBrowser || IsWindows ? false : Libc.geteuid() == 0;
+        public static bool IsSuperUser => IsBrowser || IsWindows ? false : libc.geteuid() == 0;
 
         public static Version OpenSslVersion => !IsOSXLike && !IsWindows && !IsAndroid ?
             GetOpenSslVersion() :
@@ -77,7 +77,7 @@ public static string LibcRelease
 
                 try
                 {
-                    return Marshal.PtrToStringAnsi(Libc.gnu_get_libc_release());
+                    return Marshal.PtrToStringAnsi(libc.gnu_get_libc_release());
                 }
                 catch (Exception e) when (e is DllNotFoundException || e is EntryPointNotFoundException)
                 {
@@ -101,7 +101,7 @@ public static string LibcVersion
 
                 try
                 {
-                    return Marshal.PtrToStringAnsi(Libc.gnu_get_libc_version());
+                    return Marshal.PtrToStringAnsi(libc.gnu_get_libc_version());
                 }
                 catch (Exception e) when (e is DllNotFoundException || e is EntryPointNotFoundException)
                 {
@@ -324,7 +324,7 @@ private struct DistroInfo
             public Version VersionId { get; set; }
         }
 
-        private static partial class Libc
+        private static partial class @libc
         {
             [GeneratedDllImport("libc", SetLastError = true)]
             public static unsafe partial uint geteuid();

src/libraries/Microsoft.Extensions.Hosting.Systemd/src/Microsoft.Extensions.Hosting.Systemd.csproj

@@ -8,8 +8,6 @@
     <DisableImplicitAssemblyReferences>false</DisableImplicitAssemblyReferences>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <IsPackable>true</IsPackable>
-    <!-- CS8981: The type name 'libc' only contains lower-cased ascii characters. Such names may become reserved for the language. -->
-    <NoWarn>$(NoWarn);CS8981</NoWarn>
   </PropertyGroup>
 
   <ItemGroup Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">

src/libraries/System.Runtime.InteropServices/tests/TestAssets/NativeExports/Error.cs

@@ -17,7 +17,7 @@ private class Kernel32
             public static extern int GetLastError();
         }
 
-        private class Libc
+        private class @libc
         {
             [DllImport("libc")]
             internal static unsafe extern int* __errno_location();

src/tests/Common/Coreclr.TestWrapper/CoreclrTestWrapperLib.cs

@@ -61,7 +61,7 @@ public unsafe struct ProcessEntry32W
         public static extern bool Process32NextW(IntPtr snapshot, ref ProcessEntry32W entry);
     }
 
-    static class libproc
+    static class @libproc
     {
         [DllImport(nameof(libproc))]
         private static extern int proc_listchildpids(int ppid, int[] buffer, int byteSize);