1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
// Copyright (C) 2015-2024 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#ifndef PID_FILE_H
#define PID_FILE_H

#include <exceptions/exceptions.h>
#include <boost/shared_ptr.hpp><--- Include file:  not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <fstream><--- Include file:  not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <ostream><--- Include file:  not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <string><--- Include file:  not found. Please note: Cppcheck does not need standard library headers to get proper results.

namespace isc {
namespace util {

/// @brief Exception thrown when an error occurs during PID file processing.
class PIDFileError : public Exception {
public:
    PIDFileError(const char* file, size_t line, const char* what) :
        isc::Exception(file, line, what) { }
};

/// @brief Exception thrown when an error occurs trying to read a PID
/// from an opened file.
class PIDCantReadPID : public Exception {
public:
    PIDCantReadPID(const char* file, size_t line, const char* what) :
        isc::Exception(file, line, what) { }
};

/// @brief Class to help with processing PID files
///
/// This is a utility class to manipulate PID file. It provides
/// functions for writing and deleting a file containing a PID as
/// well as for extracting a PID from a file and checking if the
/// process is still running.
class PIDFile {
public:
    /// @brief Constructor
    ///
    /// @param filename PID filename.
    PIDFile(const std::string& filename);

    /// @brief Destructor
    ~PIDFile();

    /// @brief Read the PID in from the file and check it.
    ///
    /// Read the PID in from the file then use it to see if
    /// a process with that PID exists. If the file doesn't
    /// exist treat it as the process not being there.
    /// If the file exists but can't be read or it doesn't have
    /// the proper format treat it as the process existing.
    ///
    /// @return returns the PID if it is in, 0 otherwise.
    ///
    /// @throw throws PIDCantReadPID if it was able to open the file
    /// but was unable to read the PID from it.
    int check() const;

    /// @brief Write the PID to the file.
    ///
    /// @param pid the pid to write to the file.
    ///
    /// @throw throws PIDFileError if it can't open or write to the PID file.
    void write(int) const;

    /// @brief Get PID of the current process and write it to the file.
    ///
    /// @throw throws PIDFileError if it can't open or write to the PID file.
    void write() const;

    /// @brief Delete the PID file.
    ///
    /// @throw throws PIDFileError if it can't delete the PID file
    void deleteFile() const;

    /// @brief Returns the path to the PID file.
    std::string getFilename() const {<--- Function 'getFilename()' should return member 'filename_' by const reference.
        return (filename_);
    }

private:
    /// @brief PID filename
    std::string filename_;
};

/// @brief Defines a shared pointer to a PIDFile
typedef boost::shared_ptr<PIDFile> PIDFilePtr;

} // namespace isc::util
} // namespace isc

#endif // PID_FILE_H