unix socket at failure ?

Question

when I call connect() with unix socket (streaming) it creates socket file if connect fails (due no listener).
should it be that only listener creates sock file and connect() just opens it ?

Answer 1

Hello,

Welcome to Microsoft Q&A!

The socket function creates a socket that is bound to a specific transport service provider.
The listen function places a socket in a state in which it is listening for an incoming connection.

Thank you.

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Answer 2

perhaps you missunderstood my question, connect() call below makes foobar.sock when there is no listener/server.

pseudo code below:

sockfd = socket(AF_INET, SOCK_STREAM, 0);
server = gethostbyname("foobar.sock");

if (server == NULL) {
fprintf(stderr,"ERROR, no such host\n");
exit(0);
}

bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length);
serv_addr.sin_port = htons(portno);

/* Now connect to the server /
if (connect(sockfd, (struct sockaddr)&serv_addr, sizeof(serv_addr)) < 0) {
perror("ERROR connecting");
exit(1);
}

BTW: links you included do not even mention unix domain sockets.