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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>proc</title><link rel="stylesheet" type="text/css" href="docbook.css"><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"><link rel="home" href="cygwin-ug-net.html" title="Cygwin User's Guide"><link rel="up" href="using-specialnames.html#pathnames-proc" title="The /proc filesystem"><link rel="prev" href="using-specialnames.html" title="Special filenames"><link rel="next" href="using-cygwinenv.html" title="The CYGWIN environment variable"></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">proc</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="using-specialnames.html">Prev</a> </td><th width="60%" align="center">The /proc filesystem</th><td width="20%" align="right"> <a accesskey="n" href="using-cygwinenv.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="proc"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>proc — process and system information pseudo-filesystem</p></div><div class="refsect1"><a name="proc-desc"></a><h2>Description</h2><p>The <code class="filename">proc</code> filesystem is a pseudo-filesystem
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which provides an interface to Cygwin data structures.
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It is commonly mounted at <code class="filename">/proc</code>.
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Typically, it is mounted automatically by the system.
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</p><div class="refsect2"><a name="proc-overview"></a><h3>Overview</h3><p>Underneath <code class="filename">/proc</code>, there are the following
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general groups of files and subdirectories:
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</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span></code> subdirectories</span></dt><dd><p>Each one of these subdirectories contains files and
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subdirectories exposing information about the process with the
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corresponding process id.
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</p><p>The <code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span></code> subdirectories are
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visible when iterating through <code class="filename">/proc</code> with
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<span class="citerefentry"><span class="refentrytitle">readdir</span>(2)</span>
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(and thus are visible when one uses
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<span class="citerefentry"><span class="refentrytitle">ls</span>(1)</span>
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to view the contents of <code class="filename">/proc</code>).
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</p></dd><dt><span class="term"><code class="filename">/proc/self</code></span></dt><dd><p>When a process accesses this magic symbolic link, it resolves
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to the process's own <code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span></code> directory.
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[a-z]*</em></span></code></span></dt><dd><p>Various other files and subdirectories under
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<code class="filename">/proc</code> expose system-wide information.
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</p></dd></dl></div><p>All of the above are described in more detail below.
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</p></div><div class="refsect2"><a name="proc-files-and-directories"></a><h3>Files and directories</h3><p>
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The following list provides details of many of the files
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and directories under the <code class="filename">/proc</code> hierarchy.
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</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span></code></span></dt><dd><p>
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There is a numerical subdirectory for each running
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process; the subdirectory is named by the process id.
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Each <code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span></code> subdirectory
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contains the pseudo-files and directories described below.
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</p><p>The files inside each <code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span></code>
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directory are normally owned by the effective user and
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effective group id of the process.
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/cmdline</code></span></dt><dd><p>This read-only file holds the complete command line for the
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process, unless the process is a zombie.
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In the latter case, there is nothing in this file: that is, a
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read on this file will return 0 characters.
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The command-line arguments appear in this file as a set of
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strings followed by null bytes ('\0').
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/ctty</code></span></dt><dd><p>
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This read-only file holds the name of the console or control
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terminal device for the process, unless the process is detached
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from any terminal.
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In the latter case, there is only a newline in this file.
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/cwd</code></span></dt><dd><p>
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This is a symbolic link to the current working directory of the
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process.
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To find out the current working directory of process 20, for
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instance, you can do this:
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</p><pre class="screen">
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<code class="prompt">$</code> <strong class="userinput"><code>cd /proc/20/cwd; /bin/pwd</code></strong>
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</pre><p>
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</p><p>Note that the <span class="emphasis"><em>pwd</em></span> command
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is often a shell built-in, and might not work properly. In
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<span class="citerefentry"><span class="refentrytitle">bash</span>(1)</span>,
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you may use <strong class="userinput"><code>pwd -P</code></strong>.
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/environ</code></span></dt><dd><p>
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This read-only file contains the current environment that may
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have been changed by the currently executing program.
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The entries are separated by null bytes ('\0'),
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and there may be a null byte at the end.
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Thus, to print out the environment of process 1, you would do:
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</p><pre class="screen">
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<code class="prompt">$</code> <strong class="userinput"><code>cat -A /proc/1/environ</code></strong>
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</pre><p>
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</p><p>If, after an
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<span class="citerefentry"><span class="refentrytitle">execve</span>(2)</span>,
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the process modifies its environment (e.g., by calling
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functions such as
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<span class="citerefentry"><span class="refentrytitle">putenv</span>(3)</span>
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or modifying the
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<span class="citerefentry"><span class="refentrytitle">environ</span>(7)</span>
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variable directly), this file will reflect those changes.
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That may not be the case on other systems such as Linux.
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/exe</code></span></dt><dd><p>
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This file is a symbolic link containing the actual pathname of
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the executed command.
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This symbolic link can be dereferenced normally; attempting to
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open it will open the executable.
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You can even type <code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/exe</code>
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to run another copy of the same executable that is being run by
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process <span class="emphasis"><em>[pid]</em></span>.
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<code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/exe</code> is a pointer to
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the binary which was executed, and appears as a symbolic link.
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/exename</code></span></dt><dd><p>
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This read-only file contains the actual pathname of the executed
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command.
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/fd/</code></span></dt><dd><p>
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This is a subdirectory containing one entry for each
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file which the process has open, named by its file
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descriptor, and which is a symbolic link to the actual
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file.
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Thus, 0 is standard input, 1 standard output, 2 standard
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error, and so on.
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</p><p>
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For file descriptors for pipes and sockets, the entries will
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be symbolic links whose content is the file type with the
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inode. A
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<span class="citerefentry"><span class="refentrytitle">readlink</span>(2)</span>
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call on this file returns a string in the format:
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<code class="literal">type:<span class="emphasis"><em>[inode]</em></span></code>
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</p><p>For example, <code class="literal">socket:[2248868]</code>
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will be a socket and its inode is 2248868.
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</p><p>
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Programs that take a filename as a command-line argument, but
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don't take input from standard input if no argument is supplied,
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and programs that write to a file named as a command-line
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argument, but don't send their output to standard output if no
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argument is supplied, can nevertheless be made to use standard
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input or standard output by using
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<code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/fd</code> files as command-line
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arguments.
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For example, assuming that <code class="option">-i</code> is the flag
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designating an input file and <code class="option">-o</code> is the flag
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designating an output file:
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</p><pre class="screen">
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<code class="prompt">$</code> <strong class="userinput"><code>foobar -i /proc/self/fd/0 -o /proc/self/fd/1 ...</code></strong>
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</pre><p>
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and you have a working filter.
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</p><p><code class="filename">/proc/self/fd/N</code> is approximately
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the same as <code class="filename">/dev/fd/N</code> in some Unix
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and Unix-like systems.
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Most Linux <span class="command"><strong>makedev</strong></span> scripts symbolically
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link <code class="filename">/dev/fd</code> to
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<code class="filename">/proc/self/fd</code>, in fact.
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</p><p>Most systems provide symbolic links
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<code class="filename">/dev/stdin</code>,
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<code class="filename">/dev/stdout</code>, and
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<code class="filename">/dev/stderr</code>, which respectively link
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to the files <code class="literal">0</code>, <code class="literal">1</code>,
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and <code class="literal">2</code> in <code class="filename">/proc/self/fd</code>.
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Thus the example command above could be written as:
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</p><pre class="screen">
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<code class="prompt">$</code> <strong class="userinput"><code>foobar -i /dev/stdin -o /dev/stdout ...</code></strong>
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</pre><p>
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</p><p>
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Note that for file descriptors referring to inodes (pipes and
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sockets, see above), those inodes still have permission bits and
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ownership information distinct from those of the
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<code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/fd</code> entry, and that the
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owner may differ from the user and group ids of the process.
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An unprivileged process may lack permissions to open them, as in
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this example:
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</p><pre class="screen">
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<code class="prompt">$</code> <strong class="userinput"><code>echo test | sudo -u nobody cat</code></strong>
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<code class="computeroutput">test</code>
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<code class="prompt">$</code> <strong class="userinput"><code>echo test | sudo -u nobody cat /proc/self/fd/0</code></strong>
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<code class="computeroutput">cat: /proc/self/fd/0: Permission denied</code>
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</pre><p>
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</p><p>
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File descriptor 0 refers to the pipe created by the shell and
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owned by that shell's user, which is not
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<code class="literal">nobody</code>, so <span class="command"><strong>cat</strong></span>
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does not have permission to create a new file descriptor to
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read from that inode, even though it can still read from its
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existing file descriptor 0.
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/gid</code></span></dt><dd><p>
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This read-only file contains the primary group id for the
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process.
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/maps</code></span></dt><dd><p>
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A file containing the currently mapped memory regions and their
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access permissions. See
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<span class="citerefentry"><span class="refentrytitle">mmap</span>(2)</span>
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for some further information about memory mappings.
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</p><p>The format of the file is:
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</p><pre class="screen">
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<span class="emphasis"><em>address perms offset dev inode pathname</em></span>
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<code class="computeroutput">
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00010000-00020000 rw-s 00000000 0000:0000 0 [win heap 1 default shared]
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...
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00080000-00082000 rw-p 00000000 0000:0000 0 [win heap 0 default grow]
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00082000-0009A000 ===p 00002000 0000:0000 0 [win heap 0 default grow]
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000A0000-000A1000 rw-p 00000000 0000:0000 0 [win heap 2 grow]
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000A1000-000BA000 ===p 00001000 0000:0000 0 [win heap 2 grow]
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000C0000-000D9000 rw-p 00000000 0000:0000 0 [win heap 0 default grow]
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000D9000-001C0000 ===p 00019000 0000:0000 0 [win heap 0 default grow]
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00200000-00377000 ===p 00000000 0000:0000 0
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00377000-00378000 rw-p 00177000 0000:0000 0 [peb]
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00378000-0037A000 rw-p 00178000 0000:0000 0 [teb (tid 8844)]
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...
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00400000-005F9000 ===p 00000000 0000:0000 0 [stack (tid 8884)]
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005F9000-005FC000 rw-g 001F9000 0000:0000 0 [stack (tid 8884)]
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005FC000-00600000 rw-p 001FC000 0000:0000 0 [stack (tid 8884)]
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00600000-006C7000 r--s 00000000 EE45:4341 281474976741117 /proc/cygdrive/c/Windows/System32/locale.nls
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...
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100400000-100401000 r--p 00000000 EE45:4341 281474978095037 /usr/bin/sh.exe
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100401000-100413000 r-xp 00001000 EE45:4341 281474978095037 /usr/bin/sh.exe
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100413000-100414000 rw-p 00013000 EE45:4341 281474978095037 /usr/bin/sh.exe
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...
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180010000-180020000 rw-s 00000000 0000:0000 0 [procinfo]
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180020000-180029000 rw-s 00000000 0000:0000 0 [cygwin-user-shared]
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180030000-18003C000 rw-s 00000000 0000:0000 0 [cygwin-shared]
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180040000-180041000 r--p 00000000 EE45:4341 2251799814294868 /usr/bin/cygwin1.dll
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180041000-18022D000 r-xp 00001000 EE45:4341 2251799814294868 /usr/bin/cygwin1.dll
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18022D000-180231000 rwxp 001ED000 EE45:4341 2251799814294868 /usr/bin/cygwin1.dll
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180231000-18026A000 rw-p 001F1000 EE45:4341 2251799814294868 /usr/bin/cygwin1.dll
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...
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800000000-800090000 rw-p 00000000 0000:0000 0 [heap]
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800090000-820000000 ===p 00090000 0000:0000 0 [heap]
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7FF4FDEB0000-7FF4FDEB5000 r--s 00000000 0000:0000 0
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7FF4FDEB5000-7FF4FDFB0000 ===s 00005000 0000:0000 0
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7FF4FDFB0000-7FF5FDFD0000 ===p 00000000 0000:0000 0
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...
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7FFBEEAC0000-7FFBEEAC1000 r--p 00000000 EE45:4341 844424934724994 /proc/cygdrive/c/Windows/System32/kernel32.dll
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7FFBEEAC1000-7FFBEEB36000 r-xp 00001000 EE45:4341 844424934724994 /proc/cygdrive/c/Windows/System32/kernel32.dll
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7FFBEEB36000-7FFBEEB68000 r--p 00076000 EE45:4341 844424934724994 /proc/cygdrive/c/Windows/System32/kernel32.dll
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7FFBEEB68000-7FFBEEB6A000 rw-p 000A8000 EE45:4341 844424934724994 /proc/cygdrive/c/Windows/System32/kernel32.dll
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7FFBEEB6A000-7FFBEEB72000 r--p 000AA000 EE45:4341 844424934724994 /proc/cygdrive/c/Windows/System32/kernel32.dll
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...
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</code>
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</pre><p>
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</p><p>The <code class="literal">address</code> field is the address
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space in the process that the mapping occupies.
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The <code class="literal">perms</code> field is a set of permissions:
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</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">r</span></dt><dd><p>read</p></dd><dt><span class="term">w</span></dt><dd><p>write</p></dd><dt><span class="term">x</span></dt><dd><p>execute</p></dd><dt><span class="term">===</span></dt><dd><p>reserved</p></dd><dt><span class="term">s</span></dt><dd><p>shared</p></dd><dt><span class="term">g</span></dt><dd><p>guard</p></dd><dt><span class="term">p</span></dt><dd><p>private</p></dd></dl></div><p>
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</p><p>The <code class="literal">offset</code> field is the offset
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into the file/whatever;
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<code class="literal">dev</code> is the device (major:minor);
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<code class="literal">inode</code> is the inode on that device.
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0 indicates that no inode is associated with the memory
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region, as would be the case with BSS (uninitialized data).
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</p><p>The <code class="literal">pathname</code> field will usually
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be the file that is backing the mapping.
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</p><p>There are additional helpful pseudo-paths:
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</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">[<code class="literal">cygwin-shared</code>]</span></dt><dd><p>Global shared Cygwin process information.</p></dd><dt><span class="term">[<code class="literal">cygwin-user-shared</code>]</span></dt><dd><p>Global shared Cygwin user information.</p></dd><dt><span class="term">[<code class="literal">peb</code>]</span></dt><dd><p>Windows Process Environment Block.</p></dd><dt><span class="term">[<code class="literal">procinfo</code>]</span></dt><dd><p>Cygwin process information.</p></dd><dt><span class="term">[<code class="literal">shared-user-data</code>]</span></dt><dd><p>Shared user information.</p></dd><dt><span class="term">[<code class="literal">heap</code>]</span></dt><dd><p>The process's heap.</p></dd><dt><span class="term">[<code class="literal">stack</code>]</span></dt><dd><p>
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The initial process's (also known as the main
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thread's) stack.
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</p></dd><dt><span class="term">[<code class="literal">stack</code>
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(tid <code class="literal"><tid></code>)]
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</span></dt><dd><p>
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A thread's stack (where the
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<code class="literal"><tid></code> is a thread id).
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</p></dd><dt><span class="term">[<code class="literal">teb</code>
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(tid <code class="literal"><tid></code>)]
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</span></dt><dd><p>
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Windows Thread Environment Block (where
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<code class="literal"><tid></code> is a thread id).
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</p></dd><dt><span class="term">[<code class="literal">win heap <n>
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default shared exec grow noserial debug</code>]
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</span></dt><dd><p>
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Windows extended heap (where
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<code class="literal"><n></code> is a heap id)
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and the rest of the words are heap flags:
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</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">default</code></span></dt><dd><p>default heap flags</p></dd><dt><span class="term"><code class="literal">shared</code></span></dt><dd><p>shareable and mapped heap flags</p></dd><dt><span class="term"><code class="literal">exec</code></span></dt><dd><p>executable heap flag</p></dd><dt><span class="term"><code class="literal">grow</code></span></dt><dd><p>growable heap flag</p></dd><dt><span class="term"><code class="literal">noserial</code></span></dt><dd><p>do not serialize heap flag</p></dd><dt><span class="term"><code class="literal">debug</code></span></dt><dd><p>debugged heap flag</p></dd></dl></div><p>
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</p></dd></dl></div><p>
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</p><p>If the <code class="filename">pathname</code> field is blank,
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this is an anonymous mapping as obtained via
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<span class="citerefentry"><span class="refentrytitle">mmap</span>(2)</span>.
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There is no easy way to coordinate this back to a process's
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source, short of running it through
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<span class="citerefentry"><span class="refentrytitle">gdb</span>(1)</span>,
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<span class="citerefentry"><span class="refentrytitle">strace</span>(1)</span>,
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or similar.
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</p><p>
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<code class="filename">pathname</code> is shown unescaped except
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for newline characters, which are replaced with an
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octal escape sequence.
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As a result, it is not possible to determine whether the
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original <code class="filename">pathname</code> contained a newline
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character or the literal <code class="literal">\e012</code>
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character sequence.
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</p><p>
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If the mapping is file-backed and the file has been deleted,
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the string "<code class="literal"> (deleted)</code>"
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is appended to the <code class="filename">pathname</code>.
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Note that this is ambiguous too.
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</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/mountinfo</code></span></dt><dd><p>
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This file contains information about mount points in the
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process's mount namespace (see
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<span class="citerefentry"><span class="refentrytitle">mount_namespaces</span>(7)</span>).
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It supplies various information (e.g., propagation state, root
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of mount for bind mounts, identifier for each mount and its
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parent) that is missing from the (older)
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<code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/mounts</code>
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file, and fixes various other problems with that file (e.g.,
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nonextensibility, failure to distinguish per-mount versus
|
|
per-superblock options).
|
|
</p><p>The file contains lines of the form:</p><pre class="screen">
|
|
<code class="computeroutput">
|
|
36 35 98:0 /mnt1 /mnt2 rw,noatime master:1 - ext3 /dev/root rw,errors=continue
|
|
(1)(2)(3) (4) (5) (6) (?) (7) (8) (9) (10)
|
|
</code>
|
|
</pre><p>
|
|
The numbers in parentheses are labels for the descriptions below:
|
|
|
|
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">(1)</span></dt><dd><p>mount id: a unique id for the mount (may be reused after
|
|
<span class="citerefentry"><span class="refentrytitle">umount</span>(2)</span>).
|
|
</p></dd><dt><span class="term">(2)</span></dt><dd><p>parent id: the id of the parent mount (or of self for
|
|
the root of this mount namespace's mount tree).
|
|
</p></dd><dt><span class="term">(3)</span></dt><dd><p><span class="emphasis"><em>major</em></span><code class="literal">:</code><span class="emphasis"><em>minor</em></span>:
|
|
the value of <code class="literal">st_dev</code>
|
|
for files on this filesystem (see
|
|
<span class="citerefentry"><span class="refentrytitle">stat</span>(2)</span>).
|
|
</p></dd><dt><span class="term">(4)</span></dt><dd><p>root: the pathname of the directory in the filesystem
|
|
which forms the root of this mount.
|
|
</p></dd><dt><span class="term">(5)</span></dt><dd><p>mount point: the pathname of the mount point relative to
|
|
the process's root directory.
|
|
</p></dd><dt><span class="term">(6)</span></dt><dd><p>mount options: per-mount options (see
|
|
<span class="citerefentry"><span class="refentrytitle">mount</span>(2)</span>).
|
|
</p></dd><dt><span class="term">(?)</span></dt><dd><p>optional fields: zero or more fields of the form
|
|
"<span class="emphasis"><em>tag</em></span><code class="literal">[:</code><span class="emphasis"><em>value</em></span><code class="literal">]</code>";
|
|
see below.
|
|
</p></dd><dt><span class="term">(7)</span></dt><dd><p>separator: the end of the optional fields is marked by a
|
|
single hyphen.
|
|
</p></dd><dt><span class="term">(8)</span></dt><dd><p>filesystem type: the filesystem type in the form
|
|
"<span class="emphasis"><em>type</em></span><code class="literal">[.</code><span class="emphasis"><em>subtype</em></span><code class="literal">]</code>".
|
|
</p></dd><dt><span class="term">(9)</span></dt><dd><p>mount source: filesystem-specific information or
|
|
"<code class="literal">none</code>".
|
|
</p></dd><dt><span class="term">(10)</span></dt><dd><p>super options: per-superblock options (see
|
|
<span class="citerefentry"><span class="refentrytitle">mount</span>(2)</span>).
|
|
</p></dd></dl></div><p>
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/mounts</code></span></dt><dd><p>
|
|
This file lists all the filesystems currently mounted in the
|
|
process's mount namespace (see
|
|
<span class="citerefentry"><span class="refentrytitle">mount_namespaces</span>(7)</span>).
|
|
The format of this file is documented in
|
|
<span class="citerefentry"><span class="refentrytitle">fstab</span>(5)</span>.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/pgid</code></span></dt><dd><p>
|
|
This read-only file contains the process group id for the
|
|
process.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/ppid</code></span></dt><dd><p>
|
|
This read-only file contains the parent process id for the
|
|
process.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/root</code></span></dt><dd><p>
|
|
UNIX and Linux support the idea of a per-process root of the
|
|
filesystem, set by the
|
|
<span class="citerefentry"><span class="refentrytitle">chroot</span>(2)</span> system call.
|
|
This file is a symbolic link that points to the process's root
|
|
directory, and behaves in the same way as
|
|
<code class="filename">exe</code>, and
|
|
<code class="filename">fd/*</code>.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/sid</code></span></dt><dd><p>
|
|
This read-only file contains the session id for the process.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/stat</code></span></dt><dd><p>
|
|
Status information about the process.
|
|
This is used by some implementations of
|
|
<span class="citerefentry"><span class="refentrytitle">ps</span>(1)</span>.
|
|
</p><p>
|
|
The fields, in order, with their proper
|
|
<span class="citerefentry"><span class="refentrytitle">scanf</span>(3)</span> format specifiers, are listed below.
|
|
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">(1) <span class="emphasis"><em>pid</em></span> %d</span></dt><dd><p>The process id.</p></dd><dt><span class="term">(2) <span class="emphasis"><em>comm</em></span> %s</span></dt><dd><p>
|
|
The filename of the executable, in parentheses.
|
|
This is visible whether or not the executable is swapped
|
|
out.
|
|
</p></dd><dt><span class="term">(3) <span class="emphasis"><em>state</em></span> %c</span></dt><dd><p>
|
|
One of the following characters, indicating process state:
|
|
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">R</span></dt><dd><p>Runnable</p></dd><dt><span class="term">O</span></dt><dd><p>Running</p></dd><dt><span class="term">S</span></dt><dd><p>Sleeping in an interruptible wait</p></dd><dt><span class="term">D</span></dt><dd><p>Waiting in uninterruptible disk sleep</p></dd><dt><span class="term">Z</span></dt><dd><p>Zombie</p></dd><dt><span class="term">T</span></dt><dd><p>Stopped (on a signal) or trace stopped</p></dd></dl></div></dd><dt><span class="term">(4) <span class="emphasis"><em>ppid</em></span> %d</span></dt><dd><p>The PID of the parent of this process.</p></dd><dt><span class="term">(5) <span class="emphasis"><em>pgrp</em></span> %d</span></dt><dd><p>The process group id of the process.</p></dd><dt><span class="term">(6) <span class="emphasis"><em>session</em></span> %d</span></dt><dd><p>The session id of the process.</p></dd><dt><span class="term">(7) <span class="emphasis"><em>tty_nr</em></span> %d</span></dt><dd><p>
|
|
The controlling terminal of the process.
|
|
(The minor device number is contained in the combination
|
|
of bits 31 to 20 and 7 to 0; the major device number is in
|
|
bits 15 to 8.)
|
|
</p></dd><dt><span class="term">(8) <span class="emphasis"><em>tpgid</em></span> %d</span></dt><dd><p>
|
|
The id of the foreground process group of the controlling
|
|
terminal of the process.
|
|
</p></dd><dt><span class="term">(9) <span class="emphasis"><em>flags</em></span> %u</span></dt><dd><p>The kernel flags word of the process.</p></dd><dt><span class="term">(10) <span class="emphasis"><em>minflt</em></span> %lu</span></dt><dd><p>
|
|
The number of minor faults the process has made which have
|
|
not required loading a memory page from disk.
|
|
</p></dd><dt><span class="term">(11) <span class="emphasis"><em>cminflt</em></span> %lu</span></dt><dd><p>
|
|
The number of minor faults that the process's waited-for
|
|
children have made.
|
|
</p></dd><dt><span class="term">(12) <span class="emphasis"><em>majflt</em></span> %lu</span></dt><dd><p>
|
|
The number of major faults the process has made which have
|
|
required loading a memory page from disk.
|
|
</p></dd><dt><span class="term">(13) <span class="emphasis"><em>cmajflt</em></span> %lu</span></dt><dd><p>
|
|
The number of major faults that the process's waited-for
|
|
children have made.
|
|
</p></dd><dt><span class="term">(14) <span class="emphasis"><em>utime</em></span> %lu</span></dt><dd><p>
|
|
Amount of time that this process has been scheduled in
|
|
user mode, measured in clock ticks (divide by
|
|
<code class="literal">sysconf(_SC_CLK_TCK)</code>).
|
|
</p></dd><dt><span class="term">(15) <span class="emphasis"><em>stime</em></span> %lu</span></dt><dd><p>
|
|
Amount of time that this process has been scheduled in
|
|
kernel mode, measured in clock ticks (divide by
|
|
<code class="literal">sysconf(_SC_CLK_TCK)</code>).
|
|
</p></dd><dt><span class="term">(16) <span class="emphasis"><em>cutime</em></span> %ld</span></dt><dd><p>
|
|
Amount of time that this process's waited-for children
|
|
have been scheduled in user mode, measured in clock ticks
|
|
(divide by <code class="literal">sysconf(_SC_CLK_TCK)</code>).
|
|
(See also
|
|
<span class="citerefentry"><span class="refentrytitle">times</span>(2)</span>).
|
|
</p></dd><dt><span class="term">(17) <span class="emphasis"><em>cstime</em></span> %ld</span></dt><dd><p>
|
|
Amount of time that this process's waited-for children
|
|
have been scheduled in kernel mode, measured in clock
|
|
ticks (divide by <code class="literal">sysconf(_SC_CLK_TCK)</code>).
|
|
</p></dd><dt><span class="term">(18) <span class="emphasis"><em>priority</em></span> %ld</span></dt><dd><p>
|
|
For processes running a real-time scheduling policy
|
|
(<span class="emphasis"><em>policy</em></span> below; see
|
|
<span class="citerefentry"><span class="refentrytitle">sched_setscheduler</span>(2)</span>),
|
|
this is the negated scheduling priority, minus one; that
|
|
is, a number in the range -2 to -100, corresponding to
|
|
real-time priorities 1 to 99. For processes running
|
|
under a non-real-time scheduling policy, this is the raw
|
|
nice value
|
|
(<span class="citerefentry"><span class="refentrytitle">setpriority</span>(2)</span>)
|
|
as represented in the kernel.
|
|
The kernel stores nice values as numbers in the range 0
|
|
(high) to 39 (low), corresponding to the user-visible nice
|
|
range of -20 to 19.
|
|
</p></dd><dt><span class="term">(19) <span class="emphasis"><em>nice</em></span> %ld</span></dt><dd><p>
|
|
The nice value (see
|
|
<span class="citerefentry"><span class="refentrytitle">setpriority</span>(2)</span>), a value in the range 19 (low priority)
|
|
to -20 (high priority).
|
|
</p></dd><dt><span class="term">(20) <span class="emphasis"><em>num_threads</em></span> %ld</span></dt><dd><p>
|
|
Number of threads in this process. Currently shown as 0.
|
|
</p></dd><dt><span class="term">(21) <span class="emphasis"><em>itrealvalue</em></span> %ld</span></dt><dd><p>
|
|
The time in jiffies before the next
|
|
<code class="literal">SIGALRM</code>
|
|
is sent to the process due to an interval timer.
|
|
This field is no longer maintained, and is hard coded as 0.
|
|
</p></dd><dt><span class="term">(22) <span class="emphasis"><em>starttime</em></span> %llu</span></dt><dd><p>
|
|
The time the process started after system boot.
|
|
The value is expressed in clock ticks (divide by
|
|
<code class="literal">sysconf(_SC_CLK_TCK)</code>).
|
|
</p></dd><dt><span class="term">(23) <span class="emphasis"><em>vsize</em></span> %lu</span></dt><dd><p>Virtual memory size in bytes.</p></dd><dt><span class="term">(24) <span class="emphasis"><em>rss</em></span> %ld</span></dt><dd><p>
|
|
Resident Set Size: number of pages the process has in real
|
|
memory.
|
|
This is just the pages which count toward text, data, or
|
|
stack space.
|
|
This does not include pages which have not been
|
|
demand-loaded in, or which are swapped out.
|
|
</p></dd><dt><span class="term">(25) <span class="emphasis"><em>rsslim</em></span> %lu</span></dt><dd><p>
|
|
Current soft limit in bytes on the rss of the process; see
|
|
the description of <code class="literal">RLIMIT_RSS</code> in
|
|
<span class="citerefentry"><span class="refentrytitle">getrlimit</span>(2)</span>.
|
|
</p></dd></dl></div></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/statm</code></span></dt><dd><p>
|
|
Provides information about memory usage, measured in pages.
|
|
The columns are:
|
|
|
|
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">(1) size</span></dt><dd><p>total program size
|
|
(same as VmSize in <code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/status</code>)</p></dd><dt><span class="term">(2) resident</span></dt><dd><p>resident set size
|
|
(same as VmRSS in <code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/status</code>)</p></dd><dt><span class="term">(3) shared</span></dt><dd><p>number of resident shared pages
|
|
(i.e., backed by a file) (same as RssFile+RssShmem in
|
|
<code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/status</code>)</p></dd><dt><span class="term">(4) text</span></dt><dd><p>text (code)</p></dd><dt><span class="term">(5) lib</span></dt><dd><p>library</p></dd><dt><span class="term">(6) data</span></dt><dd><p>data + stack</p></dd><dt><span class="term">(7) dt</span></dt><dd><p>dirty pages (always 0)</p></dd></dl></div><p>
|
|
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/status</code></span></dt><dd><p>
|
|
Provides much of the information in
|
|
<code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/stat</code> and
|
|
<code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/statm</code>
|
|
in a format that's easier for humans to parse.
|
|
Here's an example:
|
|
|
|
</p><pre class="screen">
|
|
<code class="prompt">$</code> <strong class="userinput"><code>cat /proc/$$/status</code></strong>
|
|
<code class="computeroutput">
|
|
Name: bash
|
|
Umask: 0022
|
|
State: S (sleeping)
|
|
Tgid: 17248
|
|
Pid: 17248
|
|
PPid: 17200
|
|
Uid: 1000 1000 1000 1000
|
|
Gid: 100 100 100 100
|
|
VmSize: 131168 kB
|
|
VmLck: 0 kB
|
|
VmRSS: 13484 kB
|
|
VmData: 10332 kB
|
|
VmStk: 136 kB
|
|
VmExe: 992 kB
|
|
VmLib: 2104 kB
|
|
SigPnd: 0000000000000000
|
|
SigBlk: 0000000000010000
|
|
SigIgn: 0000000000384004
|
|
</code>
|
|
</pre><p>
|
|
|
|
</p><p>The fields are as follows:
|
|
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
|
|
<span class="emphasis"><em>Name</em></span>:
|
|
Command run by this process.
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>Umask</em></span>:
|
|
Process umask, expressed in octal with a leading zero; see
|
|
<span class="citerefentry"><span class="refentrytitle">umask</span>(2)</span>.
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>State</em></span>:
|
|
Current state of the process.
|
|
One of:
|
|
|
|
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">R</span></dt><dd><p>runnable</p></dd><dt><span class="term">O</span></dt><dd><p>running</p></dd><dt><span class="term">S</span></dt><dd><p>sleeping</p></dd><dt><span class="term">D</span></dt><dd><p>disk sleep</p></dd><dt><span class="term">T</span></dt><dd><p>stopped or tracing stop</p></dd><dt><span class="term">Z</span></dt><dd><p>zombie</p></dd></dl></div><p>
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>Tgid</em></span>:
|
|
Thread group id (i.e., Process id).
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>Pid</em></span>:
|
|
Thread id (see
|
|
<span class="citerefentry"><span class="refentrytitle">gettid</span>(2)</span>).
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>PPid</em></span>:
|
|
PID of parent process.
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>Uid</em></span>,
|
|
<span class="emphasis"><em>Gid</em></span>:
|
|
Real, effective, saved set, and filesystem UIDs (GIDs).
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>VmSize</em></span>:
|
|
Virtual memory size.
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>VmLck</em></span>:
|
|
Locked memory size (see
|
|
<span class="citerefentry"><span class="refentrytitle">mlock</span>(2)</span>).
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>VmRSS</em></span>:
|
|
Resident set size.
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>VmData</em></span>,
|
|
<span class="emphasis"><em>VmStk</em></span>,
|
|
<span class="emphasis"><em>VmExe</em></span>:
|
|
Size of data, stack, and text segments.
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>VmLib</em></span>:
|
|
Shared library code size.
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>SigPnd</em></span>:
|
|
Number of signals pending for process as a whole (see
|
|
<span class="citerefentry"><span class="refentrytitle">pthreads</span>(7)</span> and
|
|
<span class="citerefentry"><span class="refentrytitle">signal</span>(7)</span>).
|
|
</p></li><li class="listitem"><p>
|
|
<span class="emphasis"><em>SigBlk</em></span>,
|
|
<span class="emphasis"><em>SigIgn</em></span>:
|
|
Masks indicating signals being blocked and ignored (see
|
|
<span class="citerefentry"><span class="refentrytitle">signal</span>(7)</span>).
|
|
</p></li></ul></div><p>
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/uid</code></span></dt><dd><p>
|
|
This read-only file contains the user id for the process.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/winexename</code></span></dt><dd><p>
|
|
This read-only file contains the Windows pathname of the
|
|
executed command.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/<span class="emphasis"><em>[pid]</em></span>/winpid</code></span></dt><dd><p>
|
|
This read-only file contains the Windows process id for the
|
|
process.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/cpuinfo</code></span></dt><dd><p>
|
|
This is a collection of CPU and system architecture dependent
|
|
items, for each supported architecture a different list.
|
|
Two common entries are <span class="emphasis"><em>processor</em></span>
|
|
which gives CPU number and
|
|
<span class="emphasis"><em>bogomips</em></span>, a system constant
|
|
that is calculated during kernel initialization.
|
|
SMP machines have information for each CPU.
|
|
The
|
|
<span class="citerefentry"><span class="refentrytitle">lscpu</span>(1)</span>
|
|
command gathers its information from this file.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/cygdrive</code></span></dt><dd><p>
|
|
This file is a symbolic link that points to the user's
|
|
Windows mapped drive mount point, similar to
|
|
<span class="emphasis"><em>root</em></span>.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/devices</code></span></dt><dd><p>
|
|
Text listing of major numbers and device groups.
|
|
This can be used by <span class="command"><strong>makedev</strong></span>
|
|
scripts for consistency with the system.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/filesystems</code></span></dt><dd><p>
|
|
A text listing of the filesystems which are supported by Cygwin.
|
|
(See also
|
|
<span class="citerefentry"><span class="refentrytitle">filesystems</span>(5)</span>.)
|
|
If a filesystem is marked with "nodev", this means that it
|
|
does not require a block device to be mounted (e.g., virtual
|
|
filesystem, network filesystem).
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/loadavg</code></span></dt><dd><p>
|
|
The first three fields in this file are load average figures
|
|
giving the number of jobs in the run queue (state R)
|
|
averaged over 1, 5, and 15 minutes.
|
|
They are the same as the load average numbers given by
|
|
<span class="citerefentry"><span class="refentrytitle">uptime</span>(1)</span> and other programs.
|
|
The fourth field consists of two numbers separated by a slash (/).
|
|
The first of these is the number of currently runnable
|
|
scheduling entities (processes, threads).
|
|
The value after the slash is the number of scheduling entities
|
|
that currently exist on the system.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/meminfo</code></span></dt><dd><p>
|
|
This file reports statistics about memory usage on the system.
|
|
It is used by
|
|
<span class="citerefentry"><span class="refentrytitle">free</span>(1)</span>
|
|
to report the amount of free and used memory (both physical
|
|
and swap) on the system as well as the shared memory and
|
|
buffers used by the system.
|
|
Each line of the file consists of a parameter name, followed by
|
|
a colon, the value of the parameter, and an option unit of
|
|
measurement (e.g., "kB").
|
|
The list below describes the parameter names and the format
|
|
specifier required to read the field value.
|
|
Some fields are displayed only if the system was configured
|
|
with various options; those dependencies are noted in the
|
|
list.
|
|
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><span class="emphasis"><em>MemTotal</em></span> %lu</span></dt><dd><p>
|
|
Total usable RAM (i.e., physical RAM minus a few reserved
|
|
bits and the system binary code).
|
|
</p></dd><dt><span class="term"><span class="emphasis"><em>MemFree</em></span> %lu</span></dt><dd><p>
|
|
The sum of <span class="emphasis"><em>LowFree</em></span> +
|
|
<span class="emphasis"><em>HighFree</em></span>.
|
|
</p></dd><dt><span class="term"><span class="emphasis"><em>HighTotal</em></span> %lu</span></dt><dd><p>Total amount of highmem.</p></dd><dt><span class="term"><span class="emphasis"><em>HighFree</em></span> %lu</span></dt><dd><p>Amount of free highmem.</p></dd><dt><span class="term"><span class="emphasis"><em>LowTotal</em></span> %lu</span></dt><dd><p>
|
|
Total amount of lowmem.
|
|
Lowmem is memory which can be used for everything that
|
|
highmem can be used for, but it is also available for the
|
|
system's use for its own data structures.
|
|
Bad things happen when you're out of lowmem.
|
|
</p></dd><dt><span class="term"><span class="emphasis"><em>LowFree</em></span> %lu</span></dt><dd><p>Amount of free lowmem.</p></dd><dt><span class="term"><span class="emphasis"><em>SwapTotal</em></span> %lu</span></dt><dd><p>Total amount of swap space available.</p></dd><dt><span class="term"><span class="emphasis"><em>SwapFree</em></span> %lu</span></dt><dd><p>Amount of swap space that is currently unused.</p></dd></dl></div></dd><dt><span class="term"><code class="filename">/proc/misc</code></span></dt><dd><p>
|
|
Text listing of minor device numbers and names of devices with
|
|
major device number of the <code class="literal">misc</code> device group.
|
|
This can be used by <span class="command"><strong>makedev</strong></span> scripts
|
|
for consistency with the system.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/mounts</code></span></dt><dd><p>
|
|
With the introduction of per-process mount namespaces, this file
|
|
became a link to
|
|
<code class="filename">/proc/self/mounts</code>,
|
|
which lists the mount points of the process's own mount
|
|
namespace.
|
|
The format of this file is documented in
|
|
<span class="citerefentry"><span class="refentrytitle">fstab</span>(5)</span>.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/net</code></span></dt><dd><p>
|
|
This directory contains various files and subdirectories
|
|
containing information about the networking layer.
|
|
The files contain ASCII structures and are, therefore, readable
|
|
with
|
|
<span class="citerefentry"><span class="refentrytitle">cat</span>(1)</span>.
|
|
However, the standard
|
|
<span class="citerefentry"><span class="refentrytitle">netstat</span>(8)</span>
|
|
suite provides much cleaner access to these files.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/net/if_inet6</code></span></dt><dd><p>
|
|
This file contains information about IP V6 interface adapters,
|
|
if used.
|
|
Each line represents an IP V6 interface adapter.
|
|
</p><pre class="screen">
|
|
<code class="computeroutput">
|
|
fe800000000000002c393d3da6108636 12 40 20 80 {C6B5FBE5-A3AC-4DB0-A308-8EE94E1406A4}
|
|
fe8000000000000039da016f76bd92bc 13 40 20 20 {E06B8972-0918-41FC-851B-090C446C7D1C}
|
|
fe8000000000000050ba9cedf1fe1628 0b 40 20 20 {680ED6FD-DFAC-4398-AA85-FB33E17E38EA}
|
|
fe8000000000000030c5c6a0b30f109d 11 40 20 20 {B9E39F53-1659-4065-BDA5-F41162250E03}
|
|
20021840ac2c12343427e3b9ec6fa585 08 40 00 80 {4083A7F8-99CF-4220-8715-6FDF268B002F}
|
|
20021840ac2c12342403e3b2c7a5a32f 08 80 00 20 {4083A7F8-99CF-4220-8715-6FDF268B002F}
|
|
20021840ac2c1234284e8d0ecb4160cb 08 80 00 20 {4083A7F8-99CF-4220-8715-6FDF268B002F}
|
|
20021840ac2c123468cb06ea72f1d678 08 80 00 80 {4083A7F8-99CF-4220-8715-6FDF268B002F}
|
|
20021840ac2c12346cb59aca97c36e3b 08 80 00 20 {4083A7F8-99CF-4220-8715-6FDF268B002F}
|
|
20021840ac2c123498af9881de1fb828 08 80 00 20 {4083A7F8-99CF-4220-8715-6FDF268B002F}
|
|
20021840ac2c1234cd62a3d73a498611 08 80 00 20 {4083A7F8-99CF-4220-8715-6FDF268B002F}
|
|
20021840ac2c1234e410c873be09df93 08 80 00 20 {4083A7F8-99CF-4220-8715-6FDF268B002F}
|
|
fe800000000000003427e3b9ec6fa585 08 40 20 80 {4083A7F8-99CF-4220-8715-6FDF268B002F}
|
|
00000000000000000000000000000001 01 80 10 80 {2B5345AC-7502-11EA-AC73-806E6F6E6963}
|
|
(1) (2)(3)(4)(5) (6)
|
|
</code>
|
|
</pre><p>The fields in each line are:
|
|
|
|
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">(1)</span></dt><dd><p>The IP V6 address of the interface adapter.</p></dd><dt><span class="term">(2)</span></dt><dd><p>The IP V6 interface adapter index.</p></dd><dt><span class="term">(3)</span></dt><dd><p>
|
|
The prefix length of the IP V6 interface address.
|
|
</p></dd><dt><span class="term">(4)</span></dt><dd><p>The scope of the IP V6 interface address.</p></dd><dt><span class="term">(5)</span></dt><dd><p>The state of the IP V6 interface address.</p></dd><dt><span class="term">(6)</span></dt><dd><p>
|
|
The DUID/GUID/UUID of the IP V6 interface adapter.
|
|
</p></dd></dl></div><p>
|
|
</p><p>
|
|
The last number exists only for compatibility reasons and is
|
|
always 1.
|
|
</p><p>
|
|
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/partitions</code></span></dt><dd><p>
|
|
Contains the major and minor numbers of each partition as well
|
|
as the number of 1024-byte blocks and the partition name.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/registry</code></span></dt><dd><p>
|
|
Under Cygwin, this directory contains subdirectories for
|
|
registry paths, keys, and subkeys, and files named for registry
|
|
values which contain registry data, for the current process.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/registry32</code></span></dt><dd><p>
|
|
Under 64 bit Windows, this directory contains subdirectories for
|
|
registry paths, keys, and subkeys, and files named for registry
|
|
values which contain registry data, for 32 bit processes.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/registry64</code></span></dt><dd><p>
|
|
Under 64 bit Windows, this directory contains subdirectories for
|
|
registry paths, keys, and subkeys, and files named for registry
|
|
values which contain registry data, for 64 bit processes.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/self</code></span></dt><dd><p>
|
|
This directory refers to the process accessing the
|
|
<code class="filename">/proc</code> filesystem, and is identical to the
|
|
<code class="filename">/proc</code> directory named by the process id
|
|
of the same process.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/stat</code></span></dt><dd><p>
|
|
system statistics.
|
|
Varies with architecture.
|
|
Common entries include:
|
|
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><span class="emphasis"><em>cpu 10132153 0 3084719 46828483</em></span></span></dt><dd></dd><dt><span class="term"><span class="emphasis"><em>cpu0 1393280 0 572056 13343292</em></span></span></dt><dd><p>
|
|
The amount of time, measured in units of USER_HZ
|
|
(1/100ths of a second on most architectures, use
|
|
<code class="literal">sysconf(_SC_CLK_TCK)</code>
|
|
to obtain the right value), that the system ("cpu"
|
|
line) or the specific CPU
|
|
("cpu <span class="emphasis"><em>N</em></span>" line)
|
|
spent in various states:
|
|
|
|
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">(1) <span class="emphasis"><em>user</em></span></span></dt><dd><p>Time spent in user mode.</p></dd><dt><span class="term">(2) <span class="emphasis"><em>nice</em></span></span></dt><dd><p>
|
|
Time spent in user mode with low priority
|
|
(nice).
|
|
</p></dd><dt><span class="term">(3) <span class="emphasis"><em>system</em></span></span></dt><dd><p>Time spent in system mode.</p></dd><dt><span class="term">(4) <span class="emphasis"><em>idle</em></span></span></dt><dd><p>Time spent in the idle task.</p></dd></dl></div><p>
|
|
</p></dd><dt><span class="term"><span class="emphasis"><em>page 5741 1808</em></span></span></dt><dd><p>
|
|
The number of pages the system paged in and the number
|
|
that were paged out (from disk).
|
|
</p></dd><dt><span class="term"><span class="emphasis"><em>swap 1 0</em></span></span></dt><dd><p>
|
|
The number of swap pages that have been brought in and
|
|
out.
|
|
</p></dd><dt><span class="term"><span class="emphasis"><em>intr 1462898</em></span></span></dt><dd><p>The number of interrupts serviced.</p></dd><dt><span class="term"><span class="emphasis"><em>ctxt 115315</em></span></span></dt><dd><p>
|
|
The number of context switches that the system
|
|
underwent.
|
|
</p></dd><dt><span class="term"><span class="emphasis"><em>btime 769041601</em></span></span></dt><dd><p>
|
|
boot time, in seconds since the Epoch,
|
|
1970-01-01 00:00:00 +0000 (UTC).
|
|
</p></dd></dl></div><p>
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/swaps</code></span></dt><dd><p>
|
|
Swap areas in use.
|
|
See also
|
|
<span class="citerefentry"><span class="refentrytitle">swapon</span>(8)</span>.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/sys</code></span></dt><dd><p>
|
|
This directory contains a number of files and subdirectories
|
|
linking to Windows objects, which can be read using these
|
|
entries.
|
|
</p><p>
|
|
String values may be terminated by either '\0'
|
|
or '\n'.
|
|
</p><p>
|
|
Integer and long values may be either in decimal or in
|
|
hexadecimal notation (e.g. 0x3FFF).
|
|
Multiple integer or long values may be separated by any of the
|
|
following whitespace characters:
|
|
' ', '\t', or
|
|
'\n'.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/sysvipc</code></span></dt><dd><p>
|
|
Subdirectory containing the pseudo-files
|
|
<code class="filename">msg</code>, <code class="filename">sem</code>and
|
|
<code class="filename">shm</code>.
|
|
These files list the System V Interprocess Communication (IPC)
|
|
objects (respectively: message queues, semaphores, and shared
|
|
memory) that currently exist on the system, providing similar
|
|
information to that available via
|
|
<span class="citerefentry"><span class="refentrytitle">ipcs</span>(1)</span>.
|
|
These files are only available if the cygserver Cygwin service
|
|
is running.
|
|
These files have headers and are formatted (one IPC object per
|
|
line) for easy understanding.
|
|
<span class="citerefentry"><span class="refentrytitle">svipc</span>(7)</span>
|
|
provides further background on the information shown by these
|
|
files.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/uptime</code></span></dt><dd><p>
|
|
This file contains two numbers (values in seconds): the uptime
|
|
of the system (including time spent in suspend) and the amount
|
|
of time spent in the idle process.
|
|
</p></dd><dt><span class="term"><code class="filename">/proc/version</code></span></dt><dd><p>
|
|
This string identifies the Cygwin version that is currently
|
|
running.
|
|
For example:
|
|
|
|
</p><pre class="screen">
|
|
<code class="computeroutput">
|
|
CYGWIN_NT-10.0-18363 version 3.1.7-340.x86_64 (corinna@calimero) (gcc version 9.3.0 20200312 (Fedora Cygwin 9.3.0-1) (GCC) ) 2020-08-22 17:48 UTC
|
|
</code>
|
|
</pre><p>
|
|
|
|
</p></dd></dl></div></div></div><div class="refsect1"><a name="proc-notes"></a><h2>Notes</h2><p>
|
|
Many files contain strings (e.g., the environment and command
|
|
line) that are in the internal format, with subfields terminated
|
|
by null bytes ('\0').
|
|
When inspecting such files, you may find that the results are
|
|
more readable if you use a command of the following form to
|
|
display them:
|
|
|
|
</p><pre class="screen">
|
|
<code class="prompt">$</code> <strong class="userinput"><code>cat -A <span class="emphasis"><em>file</em></span></code></strong>
|
|
</pre><p>
|
|
</p><p>
|
|
This manual page is incomplete, possibly inaccurate, and is the kind
|
|
of thing that needs to be updated very often.
|
|
</p></div><div class="refsect1"><a name="proc-see_also"></a><h2>See Also</h2><p>
|
|
<span class="citerefentry"><span class="refentrytitle">cat</span>(1)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">find</span>(1)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">free</span>(1)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">ps</span>(1)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">pstree</span>(1)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">tr</span>(1)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">uptime</span>(1)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">chroot</span>(2)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">mmap</span>(2)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">readlink</span>(2)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">syslog</span>(2)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">hier</span>(7)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">arp</span>(8)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">mount</span>(8)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">netstat</span>(8)</span>,
|
|
<span class="citerefentry"><span class="refentrytitle">route</span>(8)</span>.
|
|
</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="using-specialnames.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="using-specialnames.html#pathnames-proc">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="using-cygwinenv.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Special filenames </td><td width="20%" align="center"><a accesskey="h" href="cygwin-ug-net.html">Home</a></td><td width="40%" align="right" valign="top"> The <code class="envar">CYGWIN</code> environment
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