1 //===-- FileAction.cpp ----------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include <fcntl.h>
10 
11 #include "lldb/Host/FileAction.h"
12 #include "lldb/Host/PosixApi.h"
13 #include "lldb/Utility/Stream.h"
14 
15 using namespace lldb_private;
16 
17 // FileAction member functions
18 
19 FileAction::FileAction() : m_file_spec() {}
20 
21 void FileAction::Clear() {
22   m_action = eFileActionNone;
23   m_fd = -1;
24   m_arg = -1;
25   m_file_spec.Clear();
26 }
27 
28 llvm::StringRef FileAction::GetPath() const { return m_file_spec.GetCString(); }
29 
30 const FileSpec &FileAction::GetFileSpec() const { return m_file_spec; }
31 
32 bool FileAction::Open(int fd, const FileSpec &file_spec, bool read,
33                       bool write) {
34   if ((read || write) && fd >= 0 && file_spec) {
35     m_action = eFileActionOpen;
36     m_fd = fd;
37     if (read && write)
38       m_arg = O_NOCTTY | O_CREAT | O_RDWR;
39     else if (read)
40       m_arg = O_NOCTTY | O_RDONLY;
41     else
42       m_arg = O_NOCTTY | O_CREAT | O_WRONLY;
43     m_file_spec = file_spec;
44     return true;
45   } else {
46     Clear();
47   }
48   return false;
49 }
50 
51 bool FileAction::Close(int fd) {
52   Clear();
53   if (fd >= 0) {
54     m_action = eFileActionClose;
55     m_fd = fd;
56   }
57   return m_fd >= 0;
58 }
59 
60 bool FileAction::Duplicate(int fd, int dup_fd) {
61   Clear();
62   if (fd >= 0 && dup_fd >= 0) {
63     m_action = eFileActionDuplicate;
64     m_fd = fd;
65     m_arg = dup_fd;
66   }
67   return m_fd >= 0;
68 }
69 
70 void FileAction::Dump(Stream &stream) const {
71   stream.PutCString("file action: ");
72   switch (m_action) {
73   case eFileActionClose:
74     stream.Printf("close fd %d", m_fd);
75     break;
76   case eFileActionDuplicate:
77     stream.Printf("duplicate fd %d to %d", m_fd, m_arg);
78     break;
79   case eFileActionNone:
80     stream.PutCString("no action");
81     break;
82   case eFileActionOpen:
83     stream.Printf("open fd %d with '%s', OFLAGS = 0x%x", m_fd,
84                   m_file_spec.GetCString(), m_arg);
85     break;
86   }
87 }
88