33 lines
707 B
C
33 lines
707 B
C
/**
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* @brief Perform DNS lookups.
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*
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* @copyright
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2016-2018 K. Lange
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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int main(int argc, char * argv[]) {
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if (argc < 2) return 1;
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struct hostent * host = gethostbyname(argv[1]);
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if (!host) {
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fprintf(stderr, "%s: not found\n", argv[1]);
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return 1;
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}
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char * addr = inet_ntoa(*(struct in_addr*)host->h_addr_list[0]);
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fprintf(stderr, "%s: %s\n", host->h_name, addr);
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return 0;
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}
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