/* * This program connects to the socket named in the command line * and sends a one line message to that socket. The form of the * command line is ustreamwrite pathname. */ #include <sys/types.h> #include <sys/socket.h> #include <sys/un.h> #include <stdio.h> #define DATA "Half a league, half a league..." main(argc, argv) int argc; char *argv[]; { int sock; struct sockaddr_un server; char buf[1024]; /* Create socket. */ sock = socket(AF_UNIX, SOCK_STREAM, 0); if (sock < 0) { perror("opening stream socket"); exit(1); }
/* Connect socket using name specified by command line. */ server.sun_family = AF_UNIX; strcpy(server.sun_path, argv[1]); server.sun_len = strlen(server.sun_path); if (connect(sock, (struct sockaddr *)&server, sizeof(struct sockaddr_un)) < 0) { close(sock); perror("connecting stream socket"); exit(1); } if (write(sock, DATA, sizeof(DATA)) < 0) perror("writing on stream socket"); }