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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>F.1. adminpack</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="contrib.html" title="Appendix F. Additional Supplied Modules" /><link rel="next" href="amcheck.html" title="F.2. amcheck" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">F.1. adminpack</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="contrib.html" title="Appendix F. Additional Supplied Modules">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="contrib.html" title="Appendix F. Additional Supplied Modules">Up</a></td><th width="60%" align="center">Appendix F. Additional Supplied Modules</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 11.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="amcheck.html" title="F.2. amcheck">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="ADMINPACK"><div class="titlepage"><div><div><h2 class="title" style="clear: both">F.1. adminpack</h2></div></div></div><a id="id-1.11.7.10.2" class="indexterm"></a><p>
<code class="filename">adminpack</code> provides a number of support functions which
<span class="application">pgAdmin</span> and other administration and management tools can
use to provide additional functionality, such as remote management
of server log files.
Use of all these functions is only allowed to the superuser by default but may be
allowed to other users by using the <code class="command">GRANT</code> command.
</p><p>
The functions shown in <a class="xref" href="adminpack.html#FUNCTIONS-ADMINPACK-TABLE" title="Table F.1. adminpack Functions">Table F.1</a> provide
write access to files on the machine hosting the server. (See also the
functions in <a class="xref" href="functions-admin.html#FUNCTIONS-ADMIN-GENFILE-TABLE" title="Table 9.88. Generic File Access Functions">Table 9.88</a>, which
provide read-only access.)
Only files within the database cluster directory can be accessed, unless the
user is a superuser or given one of the pg_read_server_files, or pg_write_server_files
roles, as appropriate for the function, but either a relative or absolute path is
allowable.
</p><div class="table" id="FUNCTIONS-ADMINPACK-TABLE"><p class="title"><strong>Table F.1. <code class="filename">adminpack</code> Functions</strong></p><div class="table-contents"><table class="table" summary="adminpack Functions" border="1"><colgroup><col /><col /><col /></colgroup><thead><tr><th>Name</th><th>Return Type</th><th>Description</th></tr></thead><tbody><tr><td><code class="function">pg_catalog.pg_file_write(filename text, data text, append boolean)</code></td><td><code class="type">bigint</code></td><td>
Write, or append to, a text file
</td></tr><tr><td><code class="function">pg_catalog.pg_file_rename(oldname text, newname text [<span class="optional">, archivename text</span>])</code></td><td><code class="type">boolean</code></td><td>
Rename a file
</td></tr><tr><td><code class="function">pg_catalog.pg_file_unlink(filename text)</code></td><td><code class="type">boolean</code></td><td>
Remove a file
</td></tr><tr><td><code class="function">pg_catalog.pg_logdir_ls()</code></td><td><code class="type">setof record</code></td><td>
List the log files in the <code class="varname">log_directory</code> directory
</td></tr></tbody></table></div></div><br class="table-break" /><a id="id-1.11.7.10.6" class="indexterm"></a><p>
<code class="function">pg_file_write</code> writes the specified <em class="parameter"><code>data</code></em> into
the file named by <em class="parameter"><code>filename</code></em>. If <em class="parameter"><code>append</code></em> is
false, the file must not already exist. If <em class="parameter"><code>append</code></em> is true,
the file can already exist, and will be appended to if so.
Returns the number of bytes written.
</p><a id="id-1.11.7.10.8" class="indexterm"></a><p>
<code class="function">pg_file_rename</code> renames a file. If <em class="parameter"><code>archivename</code></em>
is omitted or NULL, it simply renames <em class="parameter"><code>oldname</code></em>
to <em class="parameter"><code>newname</code></em> (which must not already exist).
If <em class="parameter"><code>archivename</code></em> is provided, it first
renames <em class="parameter"><code>newname</code></em> to <em class="parameter"><code>archivename</code></em> (which must
not already exist), and then renames <em class="parameter"><code>oldname</code></em>
to <em class="parameter"><code>newname</code></em>. In event of failure of the second rename step,
it will try to rename <em class="parameter"><code>archivename</code></em> back
to <em class="parameter"><code>newname</code></em> before reporting the error.
Returns true on success, false if the source file(s) are not present or
not writable; other cases throw errors.
</p><a id="id-1.11.7.10.10" class="indexterm"></a><p>
<code class="function">pg_file_unlink</code> removes the specified file.
Returns true on success, false if the specified file is not present
or the <code class="function">unlink()</code> call fails; other cases throw errors.
</p><a id="id-1.11.7.10.12" class="indexterm"></a><p>
<code class="function">pg_logdir_ls</code> returns the start timestamps and path
names of all the log files in the <a class="xref" href="runtime-config-logging.html#GUC-LOG-DIRECTORY">log_directory</a>
directory. The <a class="xref" href="runtime-config-logging.html#GUC-LOG-FILENAME">log_filename</a> parameter must have its
default setting (<code class="literal">postgresql-%Y-%m-%d_%H%M%S.log</code>) to use this
function.
</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="contrib.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="contrib.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="amcheck.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Appendix F. Additional Supplied Modules </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> F.2. amcheck</td></tr></table></div></body></html>
