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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2014-12-10 03:05:47 +0000 |
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| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2014-12-10 03:05:47 +0000 |
| commit | 416ef5e2bf59bb2e45066a1d5d91ac677c0f48e5 (patch) | |
| tree | 1c746d673dcec7a8488c6ac51db8245411034376 /doc/s6-dnsname.html | |
| download | s6-dns-416ef5e2bf59bb2e45066a1d5d91ac677c0f48e5.tar.xz | |
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| -rw-r--r-- | doc/s6-dnsname.html | 72 |
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diff --git a/doc/s6-dnsname.html b/doc/s6-dnsname.html new file mode 100644 index 0000000..0c0c5b0 --- /dev/null +++ b/doc/s6-dnsname.html @@ -0,0 +1,72 @@ +<html> + <head> + <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> + <meta http-equiv="Content-Language" content="en" /> + <title>s6-dns: the s6-dnsname program</title> + <meta name="Description" content="s6-dns: the s6-dnsname program" /> + <meta name="Keywords" content="s6-dns client s6-dnsname dnsname domain name ip address ipv4 ipv6" /> + <!-- <link rel="stylesheet" type="text/css" href="http://skarnet.org/default.css" /> --> + </head> +<body> + +<p> +<a href="index.html">s6-dns</a><br /> +<a href="http://skarnet.org/software/">Software</a><br /> +<a href="http://skarnet.org/">skarnet.org</a> +</p> + +<h1> The s6-dnsname program </h1> + +<p> + s6-dnsname finds the name associated to an IPv4 or IPv6 address. +</p> + +<h2> Interface </h2> + +<pre> + s6-dnsname [ -4 | -6 ] [ -r ] [ -t <em>timeout</em> ] <em>ip</em> +</pre> + +<ul> + <li> s6-dnsname converts the IP address <em>ip</em> to a name +ending in <tt>in-addr.arpa.</tt> or <tt>ip6.arpa.</tt> then makes a +PTR query for this name. +It waits for the result and prints the obtained names, one per line, +then exits 0. </li> + <li> If the domain exists but no relevant field has been found, it exits 1. </li> + <li> If the DNS answered but no answer is available, it prints a relevant +error message and exits 2. </li> + <li> By default, s6-dnsname looks for DNS cache addresses in the +<tt>/etc/resolv.conf</tt> file. If the DNSCACHEIP environment variable is set +and contains a list of IP (v4 or v6) addresses, separated by commas, +semicolons, spaces, tabs, newlines or carriage returns, then this list +is used instead. </li> +</ul> + +<h2> Options </h2> + +<ul> + <li> <tt>-4</tt> : interpret <em>ip</em> as an IPv4 address. </li> + <li> <tt>-6</tt> : interpret <em>ip</em> as an IPv6 address. +If neither of the <tt>-4</tt> and <tt>-6</tt> is given, or if both are +given, then <em>ip</em> will be interpreted as v4 or v6 depending on +its syntax. </li> + <li> <tt>-r</tt> : random. By default, the program does not sort the +result, but prints them in the order received from the DNS. With this +option, it performs a random permutation on the results before printing +them. </li> + <li> <tt>-t</tt> <em>timeout</em> : if the resolution takes more +than <em>timeout</em> milliseconds, then it exits 99 right away with an error +message. By default, <em>timeout</em> is 0, which means no timeout. </li> +</ul> + +<h2> Notes </h2> + +<ul> + <li> If the underlying skalibs has been compiled with IPv6 support disabled, +s6-dnsname will not be able to use IPv6 transport for its resolution, but it +will still accept and resolve IPv6 addresses. </li> +</ul> + +</body> +</html> |