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Annotation of embedaddon/iftop/config/int_ghba_r.c, revision 1.1

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: 
        !             7: static const char rcsid[] = "$Id: int_ghba_r.c,v 1.1 2002/11/04 12:27:35 chris Exp $";
        !             8: 
        !             9: #include <sys/types.h>
        !            10: 
        !            11: #include <errno.h>
        !            12: #include <netdb.h>
        !            13: #include <stdio.h>
        !            14: #include <stdlib.h>
        !            15: #include <netinet/in.h>
        !            16: 
        !            17: int main(void) {
        !            18:     struct in_addr localhost;
        !            19:     struct hostent hostbuf, *hp;
        !            20:     char *buf;
        !            21:     int res, herr;
        !            22:     size_t buflen = 1024;
        !            23:     
        !            24:     localhost.s_addr = htonl(INADDR_LOOPBACK);
        !            25:     buf = malloc(buflen);
        !            26:     while ((res = gethostbyaddr_r((char*)&localhost, sizeof localhost, AF_INET,
        !            27:                                   &hostbuf, buf, buflen, &hp, &herr))
        !            28:                     == ERANGE)
        !            29:         buf = (char*)realloc(buf, buflen *= 2);
        !            30: 
        !            31:     /* We assume that the loopback address can always be resolved if
        !            32:      * gethostbyaddr_r is actually working. */
        !            33:     if (res || hp == NULL) {
        !            34:         fprintf(stderr, "errno = %d, herr = %d, res = %d\n", errno, herr, res);
        !            35:         return -1;
        !            36:     } else
        !            37:         return 0;
        !            38: }