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 avaiable 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::Errno 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. The copy constructor is not available.

MEMBER FUNCTION¶

o

int connect():

 

This member returns a socket that can be used to communicate with the server process. An FBB::Errno 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::Errno 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;
        }
        return 0;
    }
    catch (Errno 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), ifdstreambuf(3bobcat), clientsocket(3bobcat), localserversocket(3bobcat), localsocketbase(3bobcat), ofdstream(3bobcat), ofdstream(3bobcat)

BUGS¶

None Reported.

DISTRIBUTION FILES¶

o

bobcat_3.01.00-x.dsc: detached signature;

o

bobcat_3.01.00-x.tar.gz: source archive;

o

bobcat_3.01.00-x_i386.changes: change log;

o

libbobcat1_3.01.00-x_*.deb: debian package holding the libraries;

o

libbobcat1-dev_3.01.00-x_*.deb: debian package holding the libraries, headers and manual pages;

o

http://sourceforge.net/projects/bobcat: public archive location;

 

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).