120 lines
3.5 KiB
HTML
120 lines
3.5 KiB
HTML
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<title>ulimit - Set or display resource limits</title>
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<SCRIPT LANGUAGE="Javascript" SRC="../rzahg/synch.js" TYPE="text/javascript"></SCRIPT>
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<h2>ulimit - Set or display resource limits</h2>
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<strong>Synopsis</strong>
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<p>
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<strong>ulimit [ -HS ] [ -acdfmnst ] [</strong> <em>limit</em> <strong>]</strong>
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</p>
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<p><strong>Description</strong></p>
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<p>The <strong>ulimit</strong> utility sets or displays resource limits. The
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resource limits apply to the current process and to any processes that are started
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after the resource limit is set.</p>
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<p>For each resource, there is a hard or maximum limit and a soft or current limit.
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The soft limit can be changed to any value that is less than or equal to the hard
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limit. The hard limit can be changed to any value that is greater than or equal to
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the soft limit. The hard limit can only be increased by a user with *JOBCTL special
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authority.</p>
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<p>On i5/OS<SUP>(TM)</SUP>, only the file size (<strong>-f</strong>) and number of descriptors
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(<strong>-n</strong>) resource limits can be set. All of the resource
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limits can be displayed.</p>
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<p><strong>Options</strong></p>
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<dl>
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<dt><strong>-a</strong></dt>
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<dd>Display all of the resource limits.</dd>
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<dt><strong>-c</strong></dt>
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<dd>Display the resource limit for the maximum size of a core file in kilobytes.</dd>
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<dt><strong>-d</strong></dt>
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<dd>Display the resource limit for the maximum size of a process' data segment in kilobytes.</dd>
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<dt><strong>-f</strong></dt>
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<dd>Set or display the resource limit for the maximum size of a file in kilobytes.</dd>
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<dt><strong>-H</strong></dt>
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<dd>Set or display the hard limit for the resource.</dd>
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<dt><strong>-m</strong></dt>
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<dd>Display the resource limit for the maximum size of a process' total available storage.</dd>
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<dt><strong>-n</strong></dt>
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<dd>Set or display the resource limit for the maximum number of file descriptors that
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can be opened by the process.</dd>
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<dt><strong>-s</strong></dt>
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<dd>Display the resource limit for the maximum size of the process' stack in kilobytes.</dd>
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<dt><strong>-S</strong></dt>
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<dd>Set or display the soft limit for the resource.</dd>
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<dt><strong>-t</strong></dt>
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<dd>Display the resource limit for the maximum amount of CPU time in seconds.</dd>
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</dl>
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<p><strong>Operands</strong></p>
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<p>When <em>limit</em> is not specified, the value of the resource limit is displayed.
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When the <strong>-H</strong> option is specified, the hard limit is displayed.
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Otherwise, the soft limit is displayed.</p>
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<p>When <em>limit</em> is specified, the value of the resource limit is set. The <em>limit</em>
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can be an <a href="arithexp.htm">arithmetic expression</a> or the
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string "unlimited" for no limit. If neither
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the <strong>-H</strong> or <strong>-S</strong> options are specified, both the hard
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and soft limits are set.</p>
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<p>If no resource is specified, the default is the file size (<strong>-f</strong>)
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resource limit.</p>
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<p><strong>Exit Status</strong></p>
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<ul>
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<li>0 when successful</li>
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<li>>0 when unsuccessful</li>
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</ul>
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<p><strong>Related information</strong></p>
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<ul>
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<li><a href="umask.htm">umask - Get or set the file mode creation mask</a></li>
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</ul>
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</body>
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</html>
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