?? 復件 (3) getname.c
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#include <netinet/in.h>#include <arpa/inet.h>#include <unistd.h>#include <netdb.h>#include <stdio.h>int main(int argc, char *argv[]){char *host, **names,**addrs;struct hostent *hostinfo;if (argc == 1){ char myname[256]; gethostname(myname,255); host = myname;}else host =argv[1];hostinfo = gethostbyname(host);if(!hostinfo){ fprintf(stderr, "cannot get info for host:%s\n",host); exit(1);}printf("results for host %s:\n",host);printf("Name: %s\n",hostinfo->h_name);printf("Aliases:");names = hostinfo->h_aliases;while(*names){ printf(" %s",*names); names++;}printf("\n");if(hostinfo->h_addrtype != AF_INET){ fprintf(stderr, "not an IP host!\n"); exit(1);}addrs = hostinfo->h_addr_list;while(*addrs){ printf(" %s",inet_ntoa(*(struct in_addr *)*addrs)); addrs++;}printf("\n");exit(0);}?? 快捷鍵說明
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