third_party/llvm-project/lldb/source/Target/FileAction.cpp

//===-- FileAction.cpp ------------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include <fcntl.h>

#include "lldb/Host/PosixApi.h"
#include "lldb/Target/FileAction.h"
#include "lldb/Utility/Stream.h"

using namespace lldb_private;

//----------------------------------------------------------------------------
// FileAction member functions
//----------------------------------------------------------------------------

FileAction::FileAction()
    : m_action(eFileActionNone), m_fd(-1), m_arg(-1), m_file_spec() {}

void FileAction::Clear() {
  m_action = eFileActionNone;
  m_fd = -1;
  m_arg = -1;
  m_file_spec.Clear();
}

llvm::StringRef FileAction::GetPath() const { return m_file_spec.GetCString(); }

const FileSpec &FileAction::GetFileSpec() const { return m_file_spec; }

bool FileAction::Open(int fd, const FileSpec &file_spec, bool read,
                      bool write) {
  if ((read || write) && fd >= 0 && file_spec) {
    m_action = eFileActionOpen;
    m_fd = fd;
    if (read && write)
      m_arg = O_NOCTTY | O_CREAT | O_RDWR;
    else if (read)
      m_arg = O_NOCTTY | O_RDONLY;
    else
      m_arg = O_NOCTTY | O_CREAT | O_WRONLY;
    m_file_spec = file_spec;
    return true;
  } else {
    Clear();
  }
  return false;
}

bool FileAction::Close(int fd) {
  Clear();
  if (fd >= 0) {
    m_action = eFileActionClose;
    m_fd = fd;
  }
  return m_fd >= 0;
}

bool FileAction::Duplicate(int fd, int dup_fd) {
  Clear();
  if (fd >= 0 && dup_fd >= 0) {
    m_action = eFileActionDuplicate;
    m_fd = fd;
    m_arg = dup_fd;
  }
  return m_fd >= 0;
}

void FileAction::Dump(Stream &stream) const {
  stream.PutCString("file action: ");
  switch (m_action) {
  case eFileActionClose:
    stream.Printf("close fd %d", m_fd);
    break;
  case eFileActionDuplicate:
    stream.Printf("duplicate fd %d to %d", m_fd, m_arg);
    break;
  case eFileActionNone:
    stream.PutCString("no action");
    break;
  case eFileActionOpen:
    stream.Printf("open fd %d with '%s', OFLAGS = 0x%x", m_fd,
                  m_file_spec.GetCString(), m_arg);
    break;
  }
}