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- #include "unp.h"## 1 ##src/names/hostent2.c##
- int## 2 ##src/names/hostent2.c##
- main(int argc, char **argv)## 3 ##src/names/hostent2.c##
- {## 4 ##src/names/hostent2.c##
- char *ptr, **pptr;## 5 ##src/names/hostent2.c##
- char str[INET6_ADDRSTRLEN];## 6 ##src/names/hostent2.c##
- struct hostent *hptr;## 7 ##src/names/hostent2.c##
- while (--argc > 0) {## 8 ##src/names/hostent2.c##
- ptr = *++argv;## 9 ##src/names/hostent2.c##
- if ((hptr = gethostbyname(ptr)) == NULL) {## 10 ##src/names/hostent2.c##
- err_msg("gethostbyname error for host: %s: %s",## 11 ##src/names/hostent2.c##
- ptr, hstrerror(h_errno));## 12 ##src/names/hostent2.c##
- continue;## 13 ##src/names/hostent2.c##
- }## 14 ##src/names/hostent2.c##
- printf("official hostname: %s\n", hptr->h_name);## 15 ##src/names/hostent2.c##
- for (pptr = hptr->h_aliases; *pptr != NULL; pptr++)## 16 ##src/names/hostent2.c##
- printf(" alias: %s\n", *pptr);## 17 ##src/names/hostent2.c##
- switch (hptr->h_addrtype) {## 18 ##src/names/hostent2.c##
- case AF_INET:## 19 ##src/names/hostent2.c##
- #ifdef AF_INET6## 20 ##src/names/hostent2.c##
- case AF_INET6:## 21 ##src/names/hostent2.c##
- #endif## 22 ##src/names/hostent2.c##
- pptr = hptr->h_addr_list;## 23 ##src/names/hostent2.c##
- for (; *pptr != NULL; pptr++) {## 24 ##src/names/hostent2.c##
- printf("\taddress: %s\n",## 25 ##src/names/hostent2.c##
- Inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str)));## 26 ##src/names/hostent2.c##
- if ((hptr = gethostbyaddr(*pptr, hptr->h_length,## 27 ##src/names/hostent2.c##
- hptr->h_addrtype)) == NULL)## 28 ##src/names/hostent2.c##
- printf("\t(gethostbyaddr failed)\n");## 29 ##src/names/hostent2.c##
- else if (hptr->h_name != NULL)## 30 ##src/names/hostent2.c##
- printf("\tname = %s\n", hptr->h_name);## 31 ##src/names/hostent2.c##
- else## 32 ##src/names/hostent2.c##
- printf("\t(no hostname returned by gethostbyaddr)\n");## 33 ##src/names/hostent2.c##
- }## 34 ##src/names/hostent2.c##
- break;## 35 ##src/names/hostent2.c##
- default:## 36 ##src/names/hostent2.c##
- err_ret("unknown address type");## 37 ##src/names/hostent2.c##
- break;## 38 ##src/names/hostent2.c##
- }## 39 ##src/names/hostent2.c##
- }## 40 ##src/names/hostent2.c##
- exit(0);## 41 ##src/names/hostent2.c##
- }## 42 ##src/names/hostent2.c##
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