Add Environment.ProcessPath

src/libraries/Common/src/Interop/Unix/System.Native/Interop.GetProcessPath.cs

@@ -0,0 +1,17 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+ internal static partial class Sys
+ {
+ /// <summary>
+ /// Takes a path containing relative subpaths or links and returns the absolute path.
+ /// This function works on both files and folders and returns a null-terminated string.
+ /// </summary>
+ [DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_GetProcessPath", SetLastError = true)]
+ internal static extern string? GetProcessPath();
+ }
+}

src/libraries/Common/src/Interop/Windows/Kernel32/Interop.GetModuleFileName.cs

@@ -0,0 +1,16 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+using Microsoft.Win32;
+
+internal static partial class Interop
+{
+ internal static unsafe partial class Kernel32
+ {
+ [DllImport(Libraries.Kernel32, EntryPoint = "GetModuleFileNameW", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = true)]
+ internal static extern uint GetModuleFileName(IntPtr hModule, ref char lpFilename, uint nSize);
+ }
+}

src/libraries/Native/Unix/CMakeLists.txt

@@ -156,10 +156,6 @@ if (CLR_CMAKE_TARGET_LINUX)
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_GNU_SOURCE")
 endif ()
 
-if(CLR_CMAKE_TARGET_FREEBSD)
- add_definitions(-D_BSD_SOURCE) # required for getline
-endif(CLR_CMAKE_TARGET_FREEBSD)
-
 # CLR_ADDITIONAL_LINKER_FLAGS - used for passing additional arguments to linker
 # CLR_ADDITIONAL_COMPILER_OPTIONS - used for passing additional arguments to compiler
 #

src/libraries/Native/Unix/System.Native/pal_io.c

@@ -40,11 +40,6 @@
 // Somehow, AIX mangles the definition for this behind a C++ def
 // Redeclare it here
 extern int getpeereid(int, uid_t *__restrict__, gid_t *__restrict__);
-// This function declaration is hidden behind `_XOPEN_SOURCE=700`, but we need
-// `_ALL_SOURCE` to build the runtime, and that resets that definition to 600.
-// Instead of trying to wrangle ifdefs in system headers with more definitions,
-// just declare it here.
-extern ssize_t getline(char **, size_t *, FILE *);
 #endif
 
 #if HAVE_STAT64
@@ -961,17 +956,6 @@ int32_t SystemNative_PosixFAdvise(intptr_t fd, int64_t offset, int64_t length, i
 #endif
 }
 
-char* SystemNative_GetLine(FILE* stream)
-{
- assert(stream != NULL);
-
- char* lineptr = NULL;
- size_t n = 0;
- ssize_t length = getline(&lineptr, &n, stream);
-
- return length >= 0 ? lineptr : NULL;
-}
-
 int32_t SystemNative_Read(intptr_t fd, void* buffer, int32_t bufferSize)
 {
  return Common_Read(fd, buffer, bufferSize);

src/libraries/Native/Unix/System.Native/pal_io.h

@@ -598,13 +598,6 @@ PALEXPORT int32_t SystemNative_Poll(PollEvent* pollEvents, uint32_t eventCount,
  */
 PALEXPORT int32_t SystemNative_PosixFAdvise(intptr_t fd, int64_t offset, int64_t length, int32_t advice);
 
-/**
-* Reads a line from the provided stream.
-*
-* Returns the read line, or null if no line could be read. The caller is responsible for freeing the malloc'd line.
-*/
-PALEXPORT char* SystemNative_GetLine(FILE* stream);
-
 /**
  * Reads the number of bytes specified into the provided buffer from the specified, opened file descriptor.
  *

src/libraries/Native/Unix/System.Native/pal_process.c

@@ -28,6 +28,9 @@
 #include <sched.h>
 #endif
 
+#ifdef __APPLE__
+#include <mach-o/dyld.h>
+#endif
 
 // Validate that our SysLogPriority values are correct for the platform
 c_static_assert(PAL_LOG_EMERG == LOG_EMERG);
@@ -516,19 +519,6 @@ done:;
 #endif
 }
 
-FILE* SystemNative_POpen(const char* command, const char* type)
-{
- assert(command != NULL);
- assert(type != NULL);
- return popen(command, type);
-}
-
-int32_t SystemNative_PClose(FILE* stream)
-{
- assert(stream != NULL);
- return pclose(stream);
-}
-
 // Each platform type has it's own RLIMIT values but the same name, so we need
 // to convert our standard types into the platform specific ones.
 static int32_t ConvertRLimitResourcesPalToPlatform(RLimitResources value)
@@ -871,3 +861,39 @@ int32_t SystemNative_SchedGetAffinity(int32_t pid, intptr_t* mask)
  return result;
 }
 #endif
+
+// Returns the full path to the executable for the current process resolving symbolic links.
+// The caller is responsible for releasing the buffer. Returns null on error.
+char* SystemNative_GetProcessPath()
+{
+ // Get path to the executable for the current process using
+ // platform specific means.
+#ifdef __APPLE__
+ // On Mac, we ask the OS for the absolute path to the entrypoint executable
+ uint32_t path_length = 0;
+ if (_NSGetExecutablePath(nullptr, &path_length) != -1)
+ {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ char path_buf[path_length];
+ if (_NSGetExecutablePath(path_buf, &path_length) != 0)
+ {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ return realpath(path_buf, NULL);
+#else
+
+#ifdef __linux__
+#define symlinkEntrypointExecutable "/proc/self/exe"
+#else
+#define symlinkEntrypointExecutable "/proc/curproc/exe"
+#endif
+
+ // Resove the symlink to the executable from /proc
+ return realpath(symlinkEntrypointExecutable, NULL);
+#endif
+}

src/libraries/Native/Unix/System.Native/pal_process.h

@@ -36,16 +36,6 @@ PALEXPORT int32_t SystemNative_ForkAndExecProcess(
  int32_t* stdoutFd, // [out] if redirectStdout, the parent's fd for the child's stdout
  int32_t* stderrFd); // [out] if redirectStderr, the parent's fd for the child's stderr
 
-/**
- * Shim for the popen function.
- */
-PALEXPORT FILE* SystemNative_POpen(const char* command, const char* type);
-
-/**
- * Shim for the pclose function.
- */
-PALEXPORT int32_t SystemNative_PClose(FILE* stream);
-
 /************
  * The values below in the header are fixed and correct for managed callers to use forever.
  * We must never change them. The implementation must either static_assert that they are equal
@@ -252,3 +242,9 @@ PALEXPORT int32_t SystemNative_SchedSetAffinity(int32_t pid, intptr_t* mask);
  */
 PALEXPORT int32_t SystemNative_SchedGetAffinity(int32_t pid, intptr_t* mask);
 #endif
+
+/**
+ * Returns the path of the executable that started the currently executing process, 
+ * resolving symbolic links. The caller is responsible for releasing the buffer.
+ */
+PALEXPORT char* SystemNative_GetProcessPath(void);

src/libraries/System.Diagnostics.Process/src/System.Diagnostics.Process.csproj

@@ -240,8 +240,6 @@
  Link="Common\Interop\Unix\Interop.ForkAndExecProcess.cs" />
  <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.GetGroupList.cs"
  Link="Common\Interop\Unix\Interop.GetGroupList.cs" />
- <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.GetLine.cs"
- Link="Common\Interop\Unix\Interop.GetLine.cs" />
  <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.GetPwUid.cs"
  Link="Common\Interop\Unix\Interop.GetPwUid.cs" />
  <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.GetSetPriority.cs"
@@ -262,8 +260,6 @@
  Link="Common\Interop\Unix\Interop.ResourceLimits.cs" />
  <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.PathConf.cs"
  Link="Common\Interop\Unix\Interop.PathConf.cs" />
- <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.POpen.cs"
- Link="Common\Interop\Unix\Interop.POpen.cs" />
  <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.WaitId.cs"
  Link="Common\Interop\Unix\Interop.WaitId.cs" />
  <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.WaitPid.cs"

src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.FreeBSD.cs

@@ -101,12 +101,6 @@ private unsafe int ParentProcessId
  }
  }
 
- /// <summary>Gets the path to the current executable, or null if it could not be retrieved.</summary>
- private static string? GetExePath()
- {
- return Interop.Process.GetProcPath(Environment.ProcessId);
- }
-
  // ----------------------------------
  // ---- Unix PAL layer ends here ----
  // ----------------------------------

src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.OSX.cs

@@ -91,21 +91,6 @@ private int ParentProcessId
  }
  }
 
- /// <summary>Gets the path to the current executable, or null if it could not be retrieved.</summary>
- private static string? GetExePath()
- {
- try
- {
- return Interop.libproc.proc_pidpath(Environment.ProcessId);
- }
- catch (Win32Exception)
- {
- // It will throw System.ComponentModel.Win32Exception (2): No such file or Directory when
- // the executable file is deleted.
- return null;
- }
- }
-
  // ----------------------------------
  // ---- Unix PAL layer ends here ----
  // ----------------------------------

src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.Unix.cs

@@ -680,7 +680,7 @@ private static string[] CreateEnvp(ProcessStartInfo psi)
  }
 
  // Then check the executable's directory
- string? path = GetExePath();
+ string? path = Environment.ProcessPath;
  if (path != null)
  {
  try

src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.UnknownUnix.cs

@@ -76,11 +76,6 @@ private void SetWorkingSetLimitsCore(IntPtr? newMin, IntPtr? newMax, out IntPtr
  throw new PlatformNotSupportedException();
  }
 
- private static string GetExePath()
- {
- throw new PlatformNotSupportedException();
- }
-
  /// <summary>Gets execution path</summary>
  private string GetPathToOpenFile()
  {

src/libraries/System.Diagnostics.Process/tests/ProcessTests.cs

@@ -494,15 +494,12 @@ public void TestMainModule()
  {
  Process p = Process.GetCurrentProcess();
 
- // On UAP casing may not match - we use Path.GetFileName(exePath) instead of kernel32!GetModuleFileNameEx which is not available on UAP
- Func<string, string> normalize = PlatformDetection.IsInAppContainer ?
- (Func<string, string>)((s) => s.ToLowerInvariant()) :
- (s) => s;
-
  Assert.InRange(p.Modules.Count, 1, int.MaxValue);
- Assert.Equal(normalize(RemoteExecutor.HostRunnerName), normalize(p.MainModule.ModuleName));
- Assert.EndsWith(normalize(RemoteExecutor.HostRunnerName), normalize(p.MainModule.FileName));
- Assert.Equal(normalize(string.Format("System.Diagnostics.ProcessModule ({0})", RemoteExecutor.HostRunnerName)), normalize(p.MainModule.ToString()));
+ Assert.Equal(RemoteExecutor.HostRunnerName, p.MainModule.ModuleName);
+ Assert.EndsWith(RemoteExecutor.HostRunnerName, p.MainModule.FileName);
+ Assert.Equal(string.Format("System.Diagnostics.ProcessModule ({0})", RemoteExecutor.HostRunnerName), p.MainModule.ToString());
+
+ Assert.Equal(Environment.ProcessPath, p.MainModule.FileName);
  }
 
  [ConditionalFact(typeof(RemoteExecutor), nameof(RemoteExecutor.IsSupported))]

src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems

@@ -1380,6 +1380,9 @@
  <Compile Include="$(CommonPath)Interop\Windows\Kernel32\Interop.GetLongPathNameW.cs">
  <Link>Common\Interop\Windows\Kernel32\Interop.GetLongPathNameW.cs</Link>
  </Compile>
+ <Compile Include="$(CommonPath)Interop\Windows\Kernel32\Interop.GetModuleFileName.cs">
+ <Link>Common\Interop\Windows\Kernel32\Interop.GetModuleFileName.cs</Link>
+ </Compile>
  <Compile Include="$(CommonPath)Interop\Windows\Kernel32\Interop.GetProcessMemoryInfo.cs">
  <Link>Common\Interop\Windows\Kernel32\Interop.GetProcessMemoryInfo.cs</Link>
  </Compile>
@@ -1709,6 +1712,9 @@
  <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.GetHostName.cs">
  <Link>Common\Interop\Unix\System.Native\Interop.GetHostName.cs</Link>
  </Compile>
+ <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.GetProcessPath.cs">
+ <Link>Common\Interop\Unix\System.Native\Interop.GetProcessPath.cs</Link>
+ </Compile>
  <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.GetRandomBytes.cs">
  <Link>Common\Interop\Unix\System.Native\Interop.GetRandomBytes.cs</Link>
  </Compile>

src/libraries/System.Private.CoreLib/src/System/Environment.Browser.cs

@@ -26,5 +26,11 @@ private static OperatingSystem GetOSVersion()
  }
 
  private static int GetCurrentProcessId() => 42;
+
+ /// <summary>
+ /// Returns the path of the executable that started the currently executing process. Returns null when the path is not available.
+ /// </summary>
+ /// <returns>Path of the executable that started the currently executing process</returns>
+ public static string? ProcessPath => null;
  }
 }

src/libraries/System.Private.CoreLib/src/System/Environment.Unix.cs

@@ -112,5 +112,11 @@ private static unsafe bool TryGetUserNameFromPasswd(byte* buf, int bufLen, out s
  }
 
  private static int GetCurrentProcessId() => Interop.Sys.GetPid();
+
+ /// <summary>
+ /// Returns the path of the executable that started the currently executing process. Returns null when the path is not available.
+ /// </summary>
+ /// <returns>Path of the executable that started the currently executing process</returns>
+ public static string? ProcessPath => Interop.Sys.GetProcessPath();
  }
 }

src/libraries/System.Private.CoreLib/src/System/Environment.Windows.cs

@@ -72,7 +72,7 @@ private static string ExpandEnvironmentVariablesCore(string name)
  }
 
  if (length == 0)
- Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
+ throw Win32Marshal.GetExceptionForLastWin32Error();
 
  // length includes the null terminator
  builder.Length = (int)length - 1;
@@ -88,6 +88,30 @@ private static string ExpandEnvironmentVariablesCore(string name)
 
  private static int GetCurrentProcessId() => unchecked((int)Interop.Kernel32.GetCurrentProcessId());
 
+ /// <summary>
+ /// Returns the path of the executable that started the currently executing process. Returns null when the path is not available.
+ /// </summary>
+ /// <returns>Path of the executable that started the currently executing process</returns>
+ public static string? ProcessPath
+ {
+ get
+ {
+ var builder = new ValueStringBuilder(stackalloc char[Interop.Kernel32.MAX_PATH]);
+
+ uint length;
+ while ((length = Interop.Kernel32.GetModuleFileName(IntPtr.Zero, ref builder.GetPinnableReference(), (uint)builder.Capacity)) >= builder.Capacity)
+ {
+ builder.EnsureCapacity((int)length);
+ }
+
+ if (length == 0)
+ throw Win32Marshal.GetExceptionForLastWin32Error();
+
+ builder.Length = (int)length;
+ return builder.ToString();
+ }
+ }
+
  private static unsafe OperatingSystem GetOSVersion()
  {
  if (Interop.NtDll.RtlGetVersionEx(out Interop.NtDll.RTL_OSVERSIONINFOEX osvi) != 0)