可由inetd启动的协议无关时间获取服务器程序

#include    <time.h>
#include    <stdio.h>
#include    <stdlib.h>
#include    <unistd.h>
#include    <string.h>
#include    <sys/socket.h>

#define     MAXLINE     4096

char *sock_ntop(const struct sockaddr *, socklen_t);
void daemon_inetd(const char *, int);
void err_msg(const char *, ...);

int main(int argc, char **argv)
{
    socklen_t        len;
    struct sockaddr    *cliaddr;
    char            buff[MAXLINE];
    time_t            ticks;

    daemon_inetd(argv[0], 0);

    cliaddr = malloc(sizeof(struct sockaddr_storage));
    len = sizeof(struct sockaddr_storage);
    getpeername(0, cliaddr, &len);
    err_msg("connection from %s", sock_ntop(cliaddr, len));

    ticks = time(NULL);
    snprintf(buff, sizeof(buff), "%.24s
", ctime(&ticks));
    write(0, buff, strlen(buff));

    close(0);    /* close TCP connection */
    exit(0);
}