<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>function::substr</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1"><link rel="start" href="index.html" title="SystemTap Tapset Reference Manual"><link rel="up" href="ch27.html" title="Chapter 27. A collection of standard string functions"><link rel="prev" href="re472.html" title="function::strtol"><link rel="next" href="re474.html" title="function::text_str"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>function::substr</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re472.html">Prev</a> </td><th width="60%" align="center">Chapter 27. A collection of standard string functions</th><td width="20%" align="right"> <a accesskey="n" href="re474.html">Next</a></td></tr></table><hr></div><div class="refentry" lang="en"><a name="API-substr"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>function::substr —
Returns a substring
</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="programlisting">
substr:string(str:string,start:long,length:long)
</pre></div><div class="refsect1" lang="en"><a name="idp11882464"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>str</code></em></span></dt><dd><p>
the string to take a substring from
</p></dd><dt><span class="term"><em class="parameter"><code>start</code></em></span></dt><dd><p>
starting position of the extracted string (first character is 0)
</p></dd><dt><span class="term"><em class="parameter"><code>length</code></em></span></dt><dd><p>
length of string to return
</p></dd></dl></div></div><div class="refsect1" lang="en"><a name="idp11889728"></a><h2>Description</h2><p>
Returns the substring of the given string at the given
start position with the given length (or smaller if the length of the
original string is less than start + length, or length is bigger than
MAXSTRINGLEN).
</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re472.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch27.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re474.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>function::strtol</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>function::text_str</span></td></tr></table></div></body></html>
