1 files changed, 80 insertions, 0 deletions
diff --git a/lldb/source/Host/posix/FileSystemPosix.cpp b/lldb/source/Host/posix/FileSystemPosix.cpp
new file mode 100644
index 000000000000..32fae68abb4d
--- /dev/null
+++ b/lldb/source/Host/posix/FileSystemPosix.cpp
@@ -0,0 +1,80 @@
+//===-- FileSystem.cpp ------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Host/FileSystem.h"
+
+// C includes
+#include <dirent.h>
+#include <fcntl.h>
+#include <sys/mount.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#if defined(__NetBSD__)
+#include <sys/statvfs.h>
+#endif
+
+// lldb Includes
+#include "lldb/Host/Host.h"
+#include "lldb/Utility/Status.h"
+#include "lldb/Utility/StreamString.h"
+
+#include "llvm/Support/Errno.h"
+#include "llvm/Support/FileSystem.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+const char *FileSystem::DEV_NULL = "/dev/null";
+
+Status FileSystem::Symlink(const FileSpec &src, const FileSpec &dst) {
+  Status error;
+  if (::symlink(dst.GetCString(), src.GetCString()) == -1)
+    error.SetErrorToErrno();
+  return error;
+}
+
+Status FileSystem::Readlink(const FileSpec &src, FileSpec &dst) {
+  Status error;
+  char buf[PATH_MAX];
+  ssize_t count = ::readlink(src.GetCString(), buf, sizeof(buf) - 1);
+  if (count < 0)
+    error.SetErrorToErrno();
+  else {
+    buf[count] = '\0'; // Success
+    dst.SetFile(buf, FileSpec::Style::native);
+  }
+  return error;
+}
+
+Status FileSystem::ResolveSymbolicLink(const FileSpec &src, FileSpec &dst) {
+  char resolved_path[PATH_MAX];
+  if (!src.GetPath(resolved_path, sizeof(resolved_path))) {
+    return Status("Couldn't get the canonical path for %s", src.GetCString());
+  }
+
+  char real_path[PATH_MAX + 1];
+  if (realpath(resolved_path, real_path) == nullptr) {
+    Status err;
+    err.SetErrorToErrno();
+    return err;
+  }
+
+  dst = FileSpec(real_path);
+
+  return Status();
+}
+
+FILE *FileSystem::Fopen(const char *path, const char *mode) {
+  return llvm::sys::RetryAfterSignal(nullptr, ::fopen, path, mode);
+}
+
+int FileSystem::Open(const char *path, int flags, int mode) {
+  return llvm::sys::RetryAfterSignal(-1, ::open, path, flags, mode);
+}