NAME¶

FBB::LocalClientSocket - Client Socket connecting to a Server in the Unix Domain

SYNOPSIS¶

#include <bobcat/localclientsocket>
Linking option: -lbobcat

DESCRIPTION¶

An FBB::LocalClientSocket may be constructed to connect to a server process in the Unix Domain. The socket made available by the FBB:LocalClientSocket may be used to initialize a std::istream and/or std::ostream. The std::istream is used to read information from the server process to which the FBB::LocalClientSocket connects, The std::ostream is used to send information to the server process to which the FBB::LocalClientSocket connects. Since a socket may be considered a file descriptor the available FBB::IFdStream, FBB::IFdStreamBuf, FBB::OFdStream, and FBB::OFdStreamBuf classes may be used profitably here. Note that having available a socket does not mean that this defines the communication protocol. It is (still) the responsibility of the programmer to comply with an existing protocol or to implement a tailor-made protocol. The latter situation implies that the sequence of input- and output operations is defined by the programmer.

NAMESPACE¶

FBB
All constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB.

INHERITS FROM¶

FBB::LocalSocketBase

CONSTRUCTOR¶

o

LocalClientSocket():
This constructor merely creates a FBB::LocalClientSocket object. Before it can be used, its open() member must be called.

o

LocalClientSocket(std::string const &name):
This constructor initializes an FBB::LocalClientSocket object, using the named Unix Domain socket to connect to the server using the named Unix Domain socket. An FBB::Exception is thrown if the socket could not be constructed. The construction of the socket does not mean that a connection has actually been established. In order to connect to the server, the member connect() (see below) should be used.

Copy and move constructors (and assignment operators) are not available.

MEMBER FUNCTION¶

o

int connect():
This member returns a socket that can be used to communicate with the server process. An FBB::Exception exception is thrown if the connection could not be established.

o

open(std::string const &name):
This member function prepares the FBB::LocalClientSocket object, constructed earlier using the default constructor, for use. The named Unix Domain socket is used to connect to the server using the named Unix Domain socket. An FBB::Exception is thrown if the socket could not be constructed. The construction of the socket does not mean that a connection has actually been established. In order to connect to the server, the member connect() should be used.

EXAMPLE¶

See also the localserversocket(3bobcat) example.

    #include <iostream>


    #include <bobcat/localclientsocket>


    #include <bobcat/ifdstream>


    #include <bobcat/ofdstream>


    using namespace std;


    using namespace FBB;


    int main(int argc, char **argv)


    try


    {


        if (argc == 1)


        {


            cerr << "Provide filename representing the unix domain socket\n";


            return 1;


        }


        LocalClientSocket client(argv[1]);


        int fd = client.connect();


        string line;


        cout << "Connecting to socket " << fd << endl;


        IFdStream in(fd);                 // stream to read from


        OFdStream out(fd);                // stream to write to


        while (true)


        {


                                    // Ask for a textline, stop if empty / none


            cout << "? ";


            if (!getline(cin, line) || line.length() == 0)


                return 0;


            cout << "Line read: " << line << endl;


                                    // Return the line to the server


            out << line.c_str() << endl;


            cout << "wrote line\n";


                                    // Wait for a reply from the server


            getline(in, line);


            cout << "Answer: " << line << endl;


        }


    }


    catch (Exception const &err)


    {


        cerr << err.what() << "\n" <<


                "Can’t connect to " << argv[1] << ", port " << argv[2] << endl;


        return 1;


    }


        

FILES¶

bobcat/localclientsocket - defines the class interface

SEE ALSO¶

bobcat(7), ifdstream(3bobcat), ifdbuf(3bobcat), clientsocket(3bobcat), localserversocket(3bobcat), localsocketbase(3bobcat), ofdstream(3bobcat), ofdstream(3bobcat)

BUGS¶

None Reported.

BOBCAT PROJECT FILES¶

o

https://fbb-git.gitlab.io/bobcat/: gitlab project page;

o

bobcat_6.03.02-x.dsc: detached signature;

o

bobcat_6.03.02-x.tar.gz: source archive;

o

bobcat_6.03.02-x_i386.changes: change log;

o

libbobcat1_6.03.02-x_*.deb: debian package containing the libraries;

o

libbobcat1-dev_6.03.02-x_*.deb: debian package containing the libraries, headers and manual pages;

BOBCAT¶

Bobcat is an acronym of `Brokken’s Own Base Classes And Templates’.

COPYRIGHT¶

This is free software, distributed under the terms of the GNU General Public License (GPL).

AUTHOR¶

Frank B. Brokken (f.b.brokken@rug.nl).