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Annotation of embedaddon/iftop/config/int_ghba_r.c, revision 1.1.1.2

1.1       misho       1: /*
                      2:  * int_ghba_r.c:
                      3:  * Test program to see whether gethostbyaddr_r takes 8 arguments and returns
                      4:  * int.
                      5:  */
                      6: 
1.1.1.2 ! misho       7: static const char rcsid[] = "$Id: int_ghba_r.c,v 1.4 2011/10/03 18:19:13 pdw Exp $";
1.1       misho       8: 
1.1.1.2 ! misho       9: #include <sys/socket.h>
1.1       misho      10: #include <sys/types.h>
                     11: 
                     12: #include <errno.h>
                     13: #include <netdb.h>
                     14: #include <stdio.h>
                     15: #include <stdlib.h>
                     16: #include <netinet/in.h>
                     17: 
                     18: int main(void) {
                     19:     struct in_addr localhost;
                     20:     struct hostent hostbuf, *hp;
                     21:     char *buf;
                     22:     int res, herr;
                     23:     size_t buflen = 1024;
                     24:     
                     25:     localhost.s_addr = htonl(INADDR_LOOPBACK);
                     26:     buf = malloc(buflen);
                     27:     while ((res = gethostbyaddr_r((char*)&localhost, sizeof localhost, AF_INET,
                     28:                                   &hostbuf, buf, buflen, &hp, &herr))
                     29:                     == ERANGE)
                     30:         buf = (char*)realloc(buf, buflen *= 2);
                     31: 
                     32:     /* We assume that the loopback address can always be resolved if
                     33:      * gethostbyaddr_r is actually working. */
                     34:     if (res || hp == NULL) {
                     35:         fprintf(stderr, "errno = %d, herr = %d, res = %d\n", errno, herr, res);
                     36:         return -1;
                     37:     } else
                     38:         return 0;
                     39: }