getservent函数

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <netdb.h>

int main(int argc, char * * argv)
{
    printf("setservent 函数执行：\n");
    setservent(1);
    printf("000000**************************************\n");
    struct servent * serv0 = NULL;
    serv0 = getservent();
    if(serv0 != NULL)
    {
        printf("s_name      =[%s]\n", serv0->s_name);
        printf("s_aliases[0]=[%s]\n", serv0->s_aliases[0]);
        printf("s_port     =[%d]\n", serv0->s_port);
        printf("s_proto     =[%d]\n", serv0->s_proto);
    }
    else
    {
        printf("serv0 is null\n");
    }

    printf("111111**************************************\n");
    struct servent * serv1 = NULL;
    serv1 = getservent();
    if(serv1 != NULL)
    {
        printf("s_name      =[%s]\n", serv1->s_name);
        printf("s_aliases[0]=[%s]\n", serv1->s_aliases[0]);
        printf("s_port     =[%d]\n", serv1->s_port);
        printf("s_proto     =[%d]\n", serv1->s_proto);
    }
    else
    {
        printf("serv1 is null\n");
    }

    printf("222222**************************************\n");
    struct servent * serv2 = NULL;
    serv2 = getservent();
    if(serv2 != NULL)
    {
        printf("s_name      =[%s]\n", serv2->s_name);
        printf("s_aliases[0]=[%s]\n", serv2->s_aliases[0]);
        printf("s_port     =[%d]\n", serv2->s_port);
        printf("s_proto     =[%d]\n", serv2->s_proto);
    }
    else
    {
        printf("serv2 is null\n");
    }

    printf("333333**************************************\n");
    struct servent * serv3 = NULL;
    serv3 = getservent();
    if(serv3 != NULL)
    {
        printf("s_name      =[%s]\n", serv3->s_name);
        printf("s_aliases[0]=[%s]\n", serv3->s_aliases[0]);
        printf("s_port     =[%d]\n", serv3->s_port);
        printf("s_proto     =[%d]\n", serv3->s_proto);
    }
    else
    {
        printf("serv3 is null\n");
    }

    setservent(1);
    printf("444444**************************************\n");
    struct servent * serv4 = NULL;
    serv4 = getservent();
    if(serv4 != NULL)
    {
        printf("s_name      =[%s]\n", serv4->s_name);
        printf("s_aliases[0]=[%s]\n", serv4->s_aliases[0]);
        printf("s_port     =[%d]\n", serv4->s_port);
        printf("s_proto     =[%d]\n", serv4->s_proto);
    }
    else
    {
        printf("serv4 is null\n");
    }

    printf("555555**************************************\n");
    struct servent * serv5 = NULL;
    serv5 = getservent();
    if(serv5 != NULL)
    {
        printf("s_name      =[%s]\n", serv5->s_name);
        printf("s_aliases[0]=[%s]\n", serv5->s_aliases[0]);
        printf("s_port     =[%d]\n", serv5->s_port);
        printf("s_proto     =[%d]\n", serv5->s_proto);
    }
    else
    {
        printf("serv5 is null\n");
    }

    printf("666666**************************************\n");
    struct servent * serv6 = NULL;
    serv6 = getservent();
    if(serv6 != NULL)
    {
        printf("s_name      =[%s]\n", serv6->s_name);
        printf("s_aliases[0]=[%s]\n", serv6->s_aliases[0]);
        printf("s_port     =[%d]\n", serv6->s_port);
        printf("s_proto     =[%d]\n", serv6->s_proto);
    }
    else
    {
        printf("serv6 is null\n");
    }

    printf("777777**************************************\n");
    struct servent * serv7 = NULL;
    serv7 = getservent();
    if(serv7 != NULL)
    {
        printf("s_name      =[%s]\n", serv7->s_name);
        printf("s_aliases[0]=[%s]\n", serv7->s_aliases[0]);
        printf("s_port     =[%d]\n", serv7->s_port);
        printf("s_proto     =[%d]\n", serv7->s_proto);
    }
    else
    {
        printf("serv7 is null\n");
    }

/*    while(1); */

    return 0;
}