99 lines
2.7 KiB
C#
99 lines
2.7 KiB
C#
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//
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// Tests for memfd_create and file sealing
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//
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// Authors:
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// Steffen Kiess (kiess@ki4.de)
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//
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// Copyright (C) 2019 Steffen Kiess
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//
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using System;
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using System.IO;
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using System.Net;
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using System.Net.Sockets;
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using System.Runtime.InteropServices;
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using Mono.Unix;
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using Mono.Unix.Native;
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using NUnit.Framework;
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namespace MonoTests.Mono.Unix.Native
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{
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[TestFixture, Category ("NotDotNet"), Category ("NotOnWindows"), Category ("NotOnMac")]
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public class MemfdTest {
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[Test]
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public unsafe void TestMemfd ()
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{
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int fd;
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try {
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fd = Syscall.memfd_create ("mono-test", 0);
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} catch (EntryPointNotFoundException) {
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Assert.Ignore ("memfd_create() not available");
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return;
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}
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if (fd < 0 && Stdlib.GetLastError () == Errno.ENOSYS)
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// Might happen on a new libc + old kernel
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Assert.Ignore ("memfd_create() returns ENOSYS");
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if (fd < 0)
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UnixMarshal.ThrowExceptionForLastError ();
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byte b = 42;
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if (Syscall.write (fd, &b, 1) < 0)
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UnixMarshal.ThrowExceptionForLastError ();
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// Should fail with EPERM because MFD_ALLOW_SEALING was not used
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var res = Syscall.fcntl(fd, FcntlCommand.F_ADD_SEALS, SealType.F_SEAL_WRITE);
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Assert.AreEqual (-1, res);
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Assert.AreEqual (Errno.EPERM, Stdlib.GetLastError ());
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//Stdlib.system ("ls -l /proc/$PPID/fd/");
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if (Syscall.close (fd) < 0)
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UnixMarshal.ThrowExceptionForLastError ();
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// Call memfd_create with MFD_ALLOW_SEALING
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fd = Syscall.memfd_create ("mono-test", MemfdFlags.MFD_CLOEXEC | MemfdFlags.MFD_ALLOW_SEALING);
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if (fd < 0)
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UnixMarshal.ThrowExceptionForLastError ();
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if (Syscall.write (fd, &b, 1) < 0)
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UnixMarshal.ThrowExceptionForLastError ();
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res = Syscall.fcntl(fd, FcntlCommand.F_GET_SEALS);
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if (res < 0)
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UnixMarshal.ThrowExceptionForLastError ();
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// Need to convert the result to SealType
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SealType sealType = NativeConvert.ToSealType (res);
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Assert.AreEqual ((SealType)0, sealType);
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if (Syscall.fcntl(fd, FcntlCommand.F_ADD_SEALS, SealType.F_SEAL_WRITE) < 0)
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UnixMarshal.ThrowExceptionForLastError ();
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// Should fail with EPERM because the file was sealed for writing
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var lres = Syscall.write (fd, &b, 1);
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Assert.AreEqual (-1, lres);
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Assert.AreEqual (Errno.EPERM, Stdlib.GetLastError ());
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res = Syscall.fcntl(fd, FcntlCommand.F_GET_SEALS);
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if (res < 0)
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UnixMarshal.ThrowExceptionForLastError ();
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// Need to convert the result to SealType
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sealType = NativeConvert.ToSealType (res);
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Assert.AreEqual (SealType.F_SEAL_WRITE, sealType);
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//Stdlib.system ("ls -l /proc/$PPID/fd/");
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if (Syscall.close (fd) < 0)
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UnixMarshal.ThrowExceptionForLastError ();
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}
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}
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}
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// vim: noexpandtab
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// Local Variables:
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// tab-width: 4
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// c-basic-offset: 4
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// indent-tabs-mode: t
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// End:
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