FileAction.cpp

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//===-- FileAction.cpp ----------------------------------------------------===//
//
// 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 <fcntl.h>
 
#include "lldb/Host/FileAction.h"
#include "lldb/Host/PosixApi.h"
#include "lldb/Utility/Stream.h"
 
using namespace lldb_private;
 
// FileAction member functions
 
FileAction::FileAction() : 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;
  }
}