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tres: added usage hints

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This commit is contained in:
Johannes Buchner 2018-10-19 12:04:39 -03:00
parent a264745605
commit 4821a598d9
1 changed files with 6 additions and 0 deletions
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6
tdns/tres.cc
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@ -446,6 +446,12 @@ try
if(argc != 2 && argc != 3) {
cerr<<"Syntax: tres name type\n";
cerr<<"Syntax: tres ip:port\n";
cerr<<"\n";
cerr<<"When name and type are specified, tres looks up a DNS record.\n";
cerr<<"types: A, NS, CNAME, SOA, PTR, MX, TXT, AAAA, ...\n";
cerr<<" see https://en.wikipedia.org/wiki/List_of_DNS_record_types\n";
cerr<<"\n";
cerr<<"When ip:port is specified, tres acts as a DNS server.\n";
return(EXIT_FAILURE);
}
signal(SIGPIPE, SIG_IGN); // TCP, so we need this