InstanceLock Class Reference

Public Member Functions
	InstanceLock (const char *path)
bool	acquired () const
	~InstanceLock ()

Private Attributes
int	fd_
std::string	path_

Detailed Description

Definition at line 98 of file SecureBrowser.cpp.

Constructor & Destructor Documentation

InstanceLock()

InstanceLock::InstanceLock ( const char * path )

inlineexplicit

Definition at line 100 of file SecureBrowser.cpp.

                                            : fd_(-1), path_(path) {
        fd_ = ::open(path, O_CREAT | O_RDWR, 0600);
        if (fd_ >= 0) {
            if (flock(fd_, LOCK_EX | LOCK_NB) != 0) {
                ::close(fd_);
                fd_ = -1;
            } else {
                ftruncate(fd_, 0);
                std::string pid = std::to_string(getpid());
                ::write(fd_, pid.c_str(), pid.size());
                ::fsync(fd_);
            }
        }
    }

References fd_, and path_.

~InstanceLock()

InstanceLock::~InstanceLock ( )

inline

Definition at line 117 of file SecureBrowser.cpp.

                    {
        if (fd_ >= 0) {
            flock(fd_, LOCK_UN);
            ::close(fd_);
        }
    }

References fd_.

Member Function Documentation

acquired()

bool InstanceLock::acquired ( ) const

inline

Definition at line 115 of file SecureBrowser.cpp.

{ return fd_ >= 0; }

References fd_.

Referenced by SecureBrowser::open(), and SecureBrowser::open_notify().

Member Data Documentation

fd_

int InstanceLock::fd_

private

Definition at line 125 of file SecureBrowser.cpp.

Referenced by acquired(), InstanceLock(), and ~InstanceLock().

path_

std::string InstanceLock::path_

private

Definition at line 126 of file SecureBrowser.cpp.

Referenced by InstanceLock().

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The documentation for this class was generated from the following file:

• BastionGuard/src/SecureBrowser.cpp