p12-5.c

来自「SUN Solaris8平台下进程间通信」· C语言 代码 · 共 31 行

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
int main(void)
{
    int    stayopen = 1;
    struct protoent *proto;
    char **ptr;
    /* 打开协议数据库，准备开始扫描 */
    setprotoent(stayopen);
    /* 逐项扫描登记项 */
    while (1) {
        proto = getprotoent();
        if (proto != (struct protoent *)0) {
           printf("Official name: %s", proto->p_name);
           for(ptr = proto->p_aliases; *ptr != NULL; ptr++)
               printf("\talias: %s", *ptr);
           printf("\tproto->p_proto=%d\n", proto->p_proto);
        }
        else
           break;
    }
    /* 关闭协议数据库 */
    endprotoent();
    exit(0);
}