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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xml:id="function.posix-getrlimit" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>posix_getrlimit</refname>
<refpurpose>Return info about system resource limits</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>array</type><methodname>posix_getrlimit</methodname>
<void/>
</methodsynopsis>
<para>
<function>posix_getrlimit</function> returns an <type>array</type>
of information about the current resource's soft and hard limits.
</para>
<para>
Each resource has an associated soft and hard limit. The soft
limit is the value that the kernel enforces for the corresponding
resource. The hard limit acts as a ceiling for the soft limit.
An unprivileged process may only set its soft limit to a value
from 0 to the hard limit, and irreversibly lower its hard limit.
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns an associative <type>array</type> of elements for each
limit that is defined. Each limit has a soft and a hard limit.
<table>
<title>List of possible limits returned</title>
<tgroup cols="2">
<thead>
<row>
<entry>Limit name</entry>
<entry>Limit description</entry>
</row>
</thead>
<tbody>
<row>
<entry>core</entry>
<entry>
The maximum size of the core file. When 0, not core files are
created. When core files are larger than this size, they will
be truncated at this size.
</entry>
</row>
<row>
<entry>totalmem</entry>
<entry>
The maximum size of the memory of the process, in bytes.
</entry>
</row>
<row>
<entry>virtualmem</entry>
<entry>
The maximum size of the virtual memory for the process, in bytes.
</entry>
</row>
<row>
<entry>data</entry>
<entry>
The maximum size of the data segment for the process, in bytes.
</entry>
</row>
<row>
<entry>stack</entry>
<entry>
The maximum size of the process stack, in bytes.
</entry>
</row>
<row>
<entry>rss</entry>
<entry>
The maximum number of virtual pages resident in RAM
</entry>
</row>
<row>
<entry>maxproc</entry>
<entry>
The maximum number of processes that can be created for the
real user ID of the calling process.
</entry>
</row>
<row>
<entry>memlock</entry>
<entry>
The maximum number of bytes of memory that may be locked into RAM.
</entry>
</row>
<row>
<entry>cpu</entry>
<entry>
The amount of time the process is allowed to use the CPU.
</entry>
</row>
<row>
<entry>filesize</entry>
<entry>
The maximum size of the data segment for the process, in bytes.
</entry>
</row>
<row>
<entry>openfiles</entry>
<entry>
One more than the maximum number of open file descriptors.
</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Example use of <function>posix_getrlimit</function></title>
<programlisting role="php">
<![CDATA[
<?php
$limits = posix_getrlimit();
print_r($limits);
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
Array
(
[soft core] => 0
[hard core] => unlimited
[soft data] => unlimited
[hard data] => unlimited
[soft stack] => 8388608
[hard stack] => unlimited
[soft totalmem] => unlimited
[hard totalmem] => unlimited
[soft rss] => unlimited
[hard rss] => unlimited
[soft maxproc] => unlimited
[hard maxproc] => unlimited
[soft memlock] => unlimited
[hard memlock] => unlimited
[soft cpu] => unlimited
[hard cpu] => unlimited
[soft filesize] => unlimited
[hard filesize] => unlimited
[soft openfiles] => 1024
[hard openfiles] => 1024
)
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<para>
This is a not POSIX function, but is common on BSD and System V
systems. If the system does not support this function, then it
will not be included at compile time. This may be checked with
<function>function_exists</function>.
</para>
</note>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member>man page GETRLIMIT(2)</member>
</simplelist>
</para>
</refsect1>
</refentry>
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