/*** $Id: cliconn.c,v 1.8 2003/09/04 02:40:35 weiym Exp $** ** cliconn.c: Create a client endpoint and connect to a server.** ** Copyright (C) 2003 Feynman Software.** Copyright (C) 2000 ~ 2002 Wei Yongming.**** Current maintainer: Wei Yongming.**** NOTE: The idea comes from sample code in APUE.** Thank Mr. Richard Stevens for his perfect work.**** Create date: 2000/12/20*//*** This program is free software; you can redistribute it and/or modify** it under the terms of the GNU General Public License as published by** the Free Software Foundation; either version 2 of the License, or** (at your option) any later version.**** This program is distributed in the hope that it will be useful,** but WITHOUT ANY WARRANTY; without even the implied warranty of** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the** GNU General Public License for more details.**** You should have received a copy of the GNU General Public License** along with this program; if not, write to the Free Software** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA***//*** TODO:*/#include <sys/types.h>#include <sys/socket.h>#include <sys/stat.h>#include <sys/un.h>#include <stdio.h>#include <string.h>#include <unistd.h>#include "ourhdr.h"#define CLI_PATH    "/var/tmp/"        /* +5 for pid = 14 chars */#define CLI_PERM    S_IRWXU            /* rwx for user only *//* returns fd if all OK, -1 on error */int cli_conn (const char *name, char project){    int                fd, len;    struct sockaddr_un unix_addr;    /* create a Unix domain stream socket */    if ( (fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)        return(-1);    /* fill socket address structure w/our address */    memset(&unix_addr, 0, sizeof(unix_addr));    unix_addr.sun_family = AF_UNIX;    sprintf(unix_addr.sun_path, "%s%05d-%c", CLI_PATH, getpid(), project);    len = /* th sizeof(unix_addr.sun_len) + */ sizeof(unix_addr.sun_family) +          strlen(unix_addr.sun_path) /* th + 1 */;    /* th unix_addr.sun_len = len; */    unlink (unix_addr.sun_path);        /* in case it already exists */    if (bind(fd, (struct sockaddr *) &unix_addr, len) < 0)        goto error;    if (chmod(unix_addr.sun_path, CLI_PERM) < 0)        goto error;    /* fill socket address structure w/server's addr */    memset(&unix_addr, 0, sizeof(unix_addr));    unix_addr.sun_family = AF_UNIX;    strcpy(unix_addr.sun_path, name);    len = /* th sizeof(unix_addr.sun_len) + */ sizeof(unix_addr.sun_family) +          strlen(unix_addr.sun_path) /* th + 1*/ ;    /* th unix_addr.sun_len = len; */    if (connect (fd, (struct sockaddr *) &unix_addr, len) < 0)        goto error;    return (fd);error:    close (fd);    return(-1);}