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<h1 class="topictitle1">Path name rules for APIs</h1>
<div><p>When using an integrated file system or ILE C/400<sup>®</sup> API to operate on an object, you
identify the object by supplying its directory path. Here is a summary of
rules to keep in mind when specifying path names in the APIs. </p>
<div class="section"><p>The term <dfn class="term">object</dfn> in these
rules refers to any directory, file, link, or other object.</p>
<ul><li>Path names are specified in hierarchical order beginning with the highest
level of the directory hierarchy. The name of each component in the path is
separated by a slash (/); for example: <pre> Dir1/Dir2/Dir3/UsrFile</pre>
<p>The
backslash (\) is not recognized as a separator. It is handled as just another
character in a name.</p>
</li>
<li>Object names must be unique within a directory.</li>
<li>The maximum length of each component of the path name and the maximum
length of the path name string can vary for each file system. </li>
<li>A / character at the beginning of a path name means that the path begins
at the <span class="q">"root"</span> (/) directory; for example: <pre> /Dir1/Dir2/Dir3/UsrFile</pre>
</li>
<li>If the path name does not begin with a / character, the path is assumed
to begin at the current directory; for example: <pre> MyDir/MyFile</pre>
<p>where
MyDir is a subdirectory of the current directory.</p>
</li>
<li> To avoid confusion with <span class="keyword">iSeries™ server</span> special
values, path names cannot start with a single asterisk (*) character.
To specify a path name that begins with any number of characters, use two
asterisks (*); for example: <pre> '**.file' </pre>
<p>Note
that this only applies to relative path names where there are no other characters
before the asterisk (*).</p>
</li>
<li>When operating on objects in the QSYS.LIB file system, the component names
must be of the form <em>name.object-type</em>; for example: <pre> /QSYS.LIB/PAYROLL.LIB/PAY.FILE</pre>
</li>
<li>When operating on objects in the independent ASP QSYS.LIB file system,
the component names must be of the form <em>name.object-type</em>; for example:
<pre> '/asp_name/QSYS.LIB/PAYDAVE.LIB/PAY.FILE</pre>
</li>
<li>Do not use a colon (:) in path names. It has a special meaning within
the server.</li>
<li>Unlike path names in integrated file system commands ,
an asterisk (*), a question mark (?), a single quotation mark ('), a quotation
mark ("), and a tilde (~) have no special significance. They are handled as
if they are just another character in a name. To avoid confusion with <span class="keyword">iSeries server</span> special values, path names
should not start with a single asterisk (*) character. The only APIs that
are exceptions to this rule are <span class="apiname">QjoEndJournal</span> and <span class="apiname">QjoStartJournal</span>.</li>
<li>When using the Qlg (using NLS-enabled path names) API interfaces, a null
character value is not allowed as one of the characters in the path name unless
a null character is specified as a path name delimiter.</li>
</ul>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaaxprogapi.htm" title="Many of the application program interfaces (APIs) that perform operations on integrated file system objects are in the form of C language functions.">Perform operations using APIs</a></div>
</div>
<div class="relconcepts"><strong>Related concepts</strong><br />
<div><a href="rzaaxpath.htm" title="A path name (also called a pathname on some systems) tells the server how to locate an object.">Path name</a></div>
</div>
<div class="relref"><strong>Related reference</strong><br />
<div><a href="rzaaxcmdpath.htm" title="When using an integrated file system command or display to operate on an object, you identify the object by supplying its path name.">Path name rules for CL commands and displays</a></div>
</div>
<div class="relinfo"><strong>Related information</strong><br />
<div><a href="../apis/qjoejobj.htm">QjoEndJournal API</a></div>
<div><a href="../apis/qjosjobj.htm">QjoStartJournal API</a></div>
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