src/System.Private.CoreLib/shared/Interop/Unix/System.Native/Interop.MountPoints.cs


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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;

internal static partial class Interop
{
    internal static partial class Sys
    {
        [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
        private unsafe delegate void MountPointFound(byte* name);

        [DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_GetAllMountPoints", SetLastError = true)]
        private static extern int GetAllMountPoints(MountPointFound mpf);

        internal static string[] GetAllMountPoints()
        {
            int count = 0;
            var found = new string[4];

            unsafe
            {
                int result = GetAllMountPoints((byte* name) =>
                {
                    if (count == found.Length)
                    {
                        Array.Resize(ref found!, count * 2); // TODO-NULLABLE: Remove ! when nullable attributes are respected
                    }
                    found[count++] = Marshal.PtrToStringAnsi((IntPtr)name)!;
                });
            }

            Array.Resize(ref found!, count); // TODO-NULLABLE: Remove ! when nullable attributes are respected
            return found;
        }
    }
}