求兄弟们指点指点_Unix网络编程之当头一棒

Suse下可以运行  但有两点不太明白，求兄弟们指点指点，谢谢！！！

不知道这个daemon_inetd()中这两个参数怎么使用  char *pname和int facility？
 

不知道用这个daemon_inetd()怎么把这个daemon_proc初始化？

#include<sys/socket.h>
#include<strings.h>
#include<string.h>
#include<stdio.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<stdlib.h>

#include<syslog.h>
#include<stdarg.h>
#include<errno.h>

#include<signal.h>
#include<fcntl.h>

#define SA      struct sockaddr
#define MAXLINE 4096
#define MAXFD   64

int     daemon_proc;    /* set nonzero by daemon_init() */

static void err_doit(int errnoflag, int level, const char *fmt, va_list ap);
void err_quit(const char *fmt, ...);
void err_sys(const char *fmt, ...);
void daemon_inetd(const char *pname, int facility);

int
main(int argc, char **argv)
{
    int                 sockfd, n;
    char                recvline[MAXLINE + 1];
    struct sockaddr_in  servaddr;

    if (argc < 2)
        err_quit("usage: a.out <IPaddress>");

    if ( (sockfd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
        err_sys("socket error");

    bzero(&servaddr, sizeof(servaddr));
    servaddr.sin_family = PF_INET;
    servaddr.sin_port   = htons(1313);  /* daytime server */
    if (inet_pton(PF_INET, argv[1], &servaddr.sin_addr) <= 0)
        err_quit("inet_pton error for %s", argv[1]);

    if (connect(sockfd, (SA *) &servaddr, sizeof(servaddr)) < 0)
        err_sys("connect error");

    while ( (n = read(sockfd, recvline, MAXLINE)) > 0) {
        recvline[n] = 0;    /* null terminate */
        if (fputs(recvline, stdout) == EOF)
            err_sys("fputs error");
    }
    if (n < 0)
        err_sys("read error");

    exit(0);
}

/* Fatal error related to a system call.
 * Print a message and terminate. */
void
err_sys(const char *fmt, ...)
{
    va_list     ap;

    va_start(ap, fmt);
    err_doit(1, LOG_ERR, fmt, ap);
    va_end(ap);
    exit(1);
}

/* Fatal error unrelated to a system call.
 * Print a message and terminate. */
void
err_quit(const char *fmt, ...)
{
    va_list     ap;

    va_start(ap, fmt);
    err_doit(0, LOG_ERR, fmt, ap);
    va_end(ap);
    exit(1);
}

/* Print a message and return to caller.
 * Caller specifies "errnoflag" and "level". */
static void
err_doit(int errnoflag, int level, const char *fmt, va_list ap)
{
    int     errno_save, n;
    char    buf[MAXLINE];

    errno_save = errno;     /* value caller might want printed */
#ifdef  HAVE_VSNPRINTF
    vsnprintf(buf, sizeof(buf), fmt, ap);   /* this is safe */
#else
    vsprintf(buf, fmt, ap);                 /* this is not safe */
#endif
    n = strlen(buf);
    if (errnoflag)
        snprintf(buf+n, sizeof(buf)-n, ": %s", strerror(errno_save));
    strcat(buf, "\n");

    if (daemon_proc) {
        syslog(level, buf);
    } else {
        fflush(stdout);     /* in case stdout and stderr are the same */
        fputs(buf, stderr);
        fflush(stderr);
    }
    return;
}

void
daemon_inetd(const char *pname, int facility)
{
    daemon_proc = 1;        /* for our err_XXX() functions */
    openlog(pname, LOG_PID, facility);
}