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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2015-01-15 20:51:39 +0000 |
|---|---|---|
| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2015-01-15 20:51:39 +0000 |
| commit | ebfd0ba17e0d4b220725018d16e294e8e22a1745 (patch) | |
| tree | 4b29683050ce9e8f24f1920f1be38b2f837ef5ad /doc/s6-accessrules-cdb-from-fs.html | |
| parent | 20c7d8e1b328155145ce9e8648435e127b60c208 (diff) | |
| download | s6-networking-ebfd0ba17e0d4b220725018d16e294e8e22a1745.tar.xz | |
Move Unix domain socket and access control stuff to s6.
Move seekablepipe to s6-portable-utils.
Version: 2.0.1.0, release candidate
Diffstat (limited to 'doc/s6-accessrules-cdb-from-fs.html')
| -rw-r--r-- | doc/s6-accessrules-cdb-from-fs.html | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/doc/s6-accessrules-cdb-from-fs.html b/doc/s6-accessrules-cdb-from-fs.html deleted file mode 100644 index 26105b1..0000000 --- a/doc/s6-accessrules-cdb-from-fs.html +++ /dev/null @@ -1,141 +0,0 @@ -<html> - <head> - <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> - <meta http-equiv="Content-Language" content="en" /> - <title>s6-networking: the s6-accessrules-cdb-from-fs program</title> - <meta name="Description" content="s6-networking: the s6-accessrules-cdb-from-fs program" /> - <meta name="Keywords" content="s6-networking s6-accessrules-cdb-from-fs tcp unix access control ipcrules tcprules cdb filesystem" /> - <!-- <link rel="stylesheet" type="text/css" href="http://skarnet.org/default.css" /> --> - </head> -<body> - -<p> -<a href="index.html">s6-networking</a><br /> -<a href="http://skarnet.org/software/">Software</a><br /> -<a href="http://skarnet.org/">skarnet.org</a> -</p> - -<h1> The <tt>s6-accessrules-cdb-from-fs</tt> program </h1> - -<p> -<tt>s6-accessrules-cdb-from-fs</tt> compiles a directory -containing a ruleset suitable for -<a href="s6-ipcserver-access.html">s6-ipcserver-access<a> or -<a href="s6-tcpserver-access.html">s6-tcpserver-access<a> into a -<a href="http://en.wikipedia.org/wiki/Cdb_(software)">CDB file</a>. -</p> - -<h2> Interface </h2> - -<pre> - s6-accessrules-cdb-from-fs <em>cdbfile</em> <em>dir</em> -</pre> - -<ul> - <li> s6-accessrules-cdb-from-fs compiles the <em>dir</em> -directory containing a ruleset into a -<a href="http://en.wikipedia.org/wiki/Cdb_(software)">CDB file</a> -<em>cdbfile</em> then exits 0. </li> -</ul> - -<h2> Ruleset directory format </h2> - -<p> - To be understood by s6-accessrules-cdb-from-fs, -<a href="s6-ipcserver-access.html">s6-ipcserver-access<a>, or -<a href="s6-tcpserver-access.html">s6-tcpserver-access<a>, -<em>dir</em> must have a specific format. -</p> - -<p> - <em>dir</em> contains a series of directories: -</p> - -<ul> - <li> <tt>ip4</tt> for rules on IPv4 addresses </li> - <li> <tt>ip6</tt> for rules on IPv6 addresses </li> - <li> <tt>reversedns</tt> for rules on host names </li> - <li> <tt>uid</tt> for rules on user IDs </li> - <li> <tt>gid</tt> for rules on group IDs </li> -</ul> - -<p> -Depending on the application, other directories can appear in <em>dir</em> -and be compiled into <em>cdbfile</em>, but -<a href="s6-tcpserver-access.html">s6-tcpserver-access<a> only -uses the first three, and -<a href="s6-ipcserver-access.html">s6-ipcserver-access<a> only -uses the last two. -</p> - -<p> - Each of those directories contains a set of rules. A rule is -a subdirectory named after the set of keys it matches, and containing -actions that will be executed if the rule is the first matching rule -for the tested key. -</p> - -<p> - The syntax for the rule name is dependent on the nature of keys, and -fully documented on the -<a href="libs6net/accessrules.html">accessrules</a> -library page. For instance, a subdirectory named <tt>192.168.0.0_27</tt> -in the <tt>ip4</tt> directory will match every IPv4 address in the -192.168.0.0/27 network that does not match a more precise rule. -</p> - -<p> - The syntax for the actions, however, is the same for every type of key. -A rule subdirectory can contain the following elements: -</p> - -<ul> - <li> a file (that can be empty) named <tt>allow</tt>. If such a file exists, -a key matching this rule will be immediately accepted. </li> - <li> a file (that can be empty) named <tt>deny</tt>. If such a file exists and -no <tt>allow</tt> file exists, a key matching this rule will be immediately -denied. </li> - <li> a subdirectory named <tt>env</tt>. If such a directory exists along -with an <tt>allow</tt> file, then its contents represent environment -modifications that will be applied after accepting the connection and -before executing the next program in the chain, as if the -<a href="http://www.skarnet.org/software/s6/s6-envdir.html">s6-envdir</a> -program, without options, was applied to <tt>env</tt>. <tt>env</tt> -has exactly the same format as a directory suitable for s6-envdir; -however, if the modifications take up more than 4096 bytes when -compiled into <em>cdbfile</em>, then s6-accessrules-cdb-from-fs will -complain and exit 100. </li> - <li> a file named <tt>exec</tt>. If such a file exists along with an -<tt>allow</tt> file, then its contents represent a command line that, -interpreted by the -<a href="http://www.skarnet.org/software/execline/execlineb.html">execlineb</a> -launcher, will be executed after accepting the connection, totally bypassing the -original command line. s6-accessrules-cdb-from-fs truncates the <tt>exec</tt> -file to 4096 bytes max when embedding it into <em>cdbfile</em>, so make -sure it is not larger than that. </li> -</ul> - -<h2> Notes </h2> - -<ul> - <li> <em>cdbfile</em> can exist prior to, and during, the compilation, -which actually works in a temporary file in the same directory as -<em>cdbfile</em> and performs an atomic replacement when it is done. -So it is not necessary to interrupt a running service during the -compilation. </li> - <li> If s6-accessrules-cdb-from-fs fails at some point, the temporary -file is removed. However, this doesn't happen if -s6-accessrules-cdb-from-fs is interrupted by a signal. </li> - <li> After the program successfully completes, if <em>dir</em> -was a suitable candidate for the <tt>-i</tt> option of -<a href="s6-ipcserver-access.html">s6-ipcserver-access</a> or -<a href="s6-tcpserver-access.html">s6-tcpserver-access</a>, then -<em>cdbfile</em> will be a suitable candidate for the <tt>-x</tt> option -of the same program, implementing the same ruleset. </li> - <li> <em>cdbfile</em> can be decompiled by the -<a href="s6-accessrules-fs-from-cdb.html">s6-accessrules-fs-from-cdb</a> -program. </li> -</ul> - -</body> -</html> |