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<title>Process ID Information - Untitled</title>
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<h3 class="section">34.6 Process, Group, and User IDs</h3>
<!-- syscalls.cc -->
<p><a name="doc_002dgetpgrp"></a>
<div class="defun">
— Built-in Function: pgid = <b>getpgrp</b> ()<var><a name="index-getpgrp-2415"></a></var><br>
<blockquote><p>Return the process group id of the current process.
</p></blockquote></div>
<!-- syscalls.cc -->
<p><a name="doc_002dgetpid"></a>
<div class="defun">
— Built-in Function: pid = <b>getpid</b> ()<var><a name="index-getpid-2416"></a></var><br>
<blockquote><p>Return the process id of the current process.
</p></blockquote></div>
<!-- syscalls.cc -->
<p><a name="doc_002dgetppid"></a>
<div class="defun">
— Built-in Function: pid = <b>getppid</b> ()<var><a name="index-getppid-2417"></a></var><br>
<blockquote><p>Return the process id of the parent process.
</p></blockquote></div>
<!-- syscalls.cc -->
<p><a name="doc_002dgeteuid"></a>
<div class="defun">
— Built-in Function: euid = <b>geteuid</b> ()<var><a name="index-geteuid-2418"></a></var><br>
<blockquote><p>Return the effective user id of the current process.
</p></blockquote></div>
<!-- syscalls.cc -->
<p><a name="doc_002dgetuid"></a>
<div class="defun">
— Built-in Function: uid = <b>getuid</b> ()<var><a name="index-getuid-2419"></a></var><br>
<blockquote><p>Return the real user id of the current process.
</p></blockquote></div>
<!-- syscalls.cc -->
<p><a name="doc_002dgetegid"></a>
<div class="defun">
— Built-in Function: egid = <b>getegid</b> ()<var><a name="index-getegid-2420"></a></var><br>
<blockquote><p>Return the effective group id of the current process.
</p></blockquote></div>
<!-- syscalls.cc -->
<p><a name="doc_002dgetgid"></a>
<div class="defun">
— Built-in Function: gid = <b>getgid</b> ()<var><a name="index-getgid-2421"></a></var><br>
<blockquote><p>Return the real group id of the current process.
</p></blockquote></div>
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