summaryrefslogtreecommitdiff
path: root/static/freebsd/man4/linux.4 3.html
diff options
context:
space:
mode:
authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:59:05 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:59:05 -0400
commit1f19f33e45791ea59aed048796fc68672c6723a5 (patch)
tree54625fba89e91d1c2177801ec635e8528bba937f /static/freebsd/man4/linux.4 3.html
parentac5e55f5f2af5b92794c2aded46c6bae85b5f5ed (diff)
docs: Removed Precompiled HTML
Diffstat (limited to 'static/freebsd/man4/linux.4 3.html')
-rw-r--r--static/freebsd/man4/linux.4 3.html152
1 files changed, 0 insertions, 152 deletions
diff --git a/static/freebsd/man4/linux.4 3.html b/static/freebsd/man4/linux.4 3.html
deleted file mode 100644
index d10dae0d..00000000
--- a/static/freebsd/man4/linux.4 3.html
+++ /dev/null
@@ -1,152 +0,0 @@
-<table class="head">
- <tr>
- <td class="head-ltitle">LINUX(4)</td>
- <td class="head-vol">Device Drivers Manual</td>
- <td class="head-rtitle">LINUX(4)</td>
- </tr>
-</table>
-<div class="manual-text">
-<section class="Sh">
-<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
-<p class="Pp"><code class="Nm">linux</code> &#x2014; <span class="Nd">Linux ABI
- support</span></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
-<p class="Pp">To enable the Linux ABI at boot time, place the following line in
- <a class="Xr">rc.conf(5)</a>:</p>
-<div class="Bd Pp Bd-indent Li">
-<pre>linux_enable=&quot;YES&quot;</pre>
-</div>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
-<p class="Pp">The <code class="Nm">linux</code> kernel module provides limited
- Linux ABI (application binary interface) compatibility, making it possible
- to run many unmodified Linux applications without the need for
- virtualization or emulation. Some of the facilities provided are:</p>
-<ul class="Bl-bullet">
- <li>Linux to native system call translation</li>
- <li>Linux-specific system calls</li>
- <li>Special signal handling for Linux processes</li>
- <li>Path translation mechanism</li>
- <li>Linux-specific virtual file systems</li>
-</ul>
-<p class="Pp">The path translation mechanism makes Linux processes look up file
- paths under <var class="Va">emul_path</var> (defaulting to
- <span class="Pa">/compat/linux</span>) before <span class="Pa">/</span>. For
- example, when a Linux process attempts to open
- <span class="Pa">/etc/passwd</span>, it will first access
- <span class="Pa">/compat/linux/etc/passwd</span>, falling back to
- <span class="Pa">/etc/passwd</span> if the compat path does not exist. This
- is used to make sure Linux processes load Linux shared libraries instead of
- their similarly-named FreeBSD counterparts, and also to provide alternative
- versions of certain other files and virtual file systems.</p>
-<p class="Pp">To install Linux shared libraries and system files into
- <span class="Pa">/compat/linux</span>, either use the
- <span class="Pa">emulators/linux_base-c7</span> port or package, or
- <a class="Xr">debootstrap(8)</a> installed from
- <span class="Pa">sysutils/debootstrap</span>.</p>
-<p class="Pp">To avoid mounting Linux-specific filesystems at startup, add the
- following line to the <a class="Xr">rc.conf(5)</a> file:</p>
-<p class="Pp"></p>
-<div class="Bd
- Bd-indent"><code class="Li">linux_mounts_enable=&quot;NO&quot;</code></div>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SYSCTL_VARIABLES"><a class="permalink" href="#SYSCTL_VARIABLES">SYSCTL
- VARIABLES</a></h1>
-<p class="Pp">The following variables are available as both
- <a class="Xr">sysctl(8)</a> variables and <a class="Xr">loader(8)</a>
- tunables:</p>
-<dl class="Bl-tag">
- <dt id="compat.linux.debug"><var class="Va">compat.linux.debug</var></dt>
- <dd>Enable debugging messages. Set to 0 to silence them. Defaults to 3. A
- setting of 1 prints debug messages, tells about unimplemented stuff (only
- once). Set to 2 is like 1, but also prints messages about implemented but
- not tested stuff (only once). Setting it to 3 or higher is like 2, but no
- rate limiting of messages.</dd>
- <dt id="compat.linux.default_openfiles"><var class="Va">compat.linux.default_openfiles</var></dt>
- <dd>Default soft openfiles resource limit for Linux applications. Set to -1 to
- disable the limit. Defaults to 1024.</dd>
- <dt id="compat.linux.emul_path"><var class="Va">compat.linux.emul_path</var></dt>
- <dd>Path to the Linux run-time environment. Defaults to
- <span class="Pa">/compat/linux</span>.</dd>
- <dt id="compat.linux.osname"><var class="Va">compat.linux.osname</var></dt>
- <dd>Linux kernel operating system name. Defaults to &quot;Linux&quot;.</dd>
- <dt id="compat.linux.osrelease"><var class="Va">compat.linux.osrelease</var></dt>
- <dd>Linux kernel operating system release. Changing this to something else is
- discouraged on non-development systems, because it may change the way
- Linux programs work. Some versions of GNU libc are known to use different
- syscalls depending on the value of this sysctl.</dd>
- <dt id="compat.linux.oss_version"><var class="Va">compat.linux.oss_version</var></dt>
- <dd>Linux Open Sound System version. Defaults to 198144.</dd>
- <dt id="compat.linux.preserve_vstatus"><var class="Va">compat.linux.preserve_vstatus</var></dt>
- <dd>When set to 1, it prevents Linux applications from resetting the
- <a class="Xr">termios(4)</a> VSTATUS setting. From a user perspective,
- this makes <var class="Va">SIGINFO</var> work for Linux executables.
- Defaults to 1.</dd>
- <dt id="compat.linux.setid_allowed"><var class="Va">compat.linux.setid_allowed</var></dt>
- <dd>Enable handling of set-user-ID and set-group-ID mode bits for the new
- process image file when image is to be executed under Linux ABI. When set
- to 0, new Linux images always use credentials of the program that issued
- the <a class="Xr">execve(2)</a> call, regardless of the image file mode.
- This might be reasonable or even required, because
- <span class="Ux">FreeBSD</span> does not emulate the Linux environment
- completely, and missed features may result in security vulnerabilities.
- Defaults to 1.</dd>
- <dt id="compat.linux32.emulate_i386"><var class="Va">compat.linux32.emulate_i386</var></dt>
- <dd>In the x86_64 (amd64) world enable the real i386 Linuxulator behavior. For
- example, when set to 0, Linux uname -m will return &quot;x86_64&quot; even
- if uname itself is a i386 Linux executable. When set to 1, Linux i386
- uname -m will return &quot;i686&quot;. Defaults to 0.</dd>
-</dl>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="FILES"><a class="permalink" href="#FILES">FILES</a></h1>
-<dl class="Bl-tag Bl-compact">
- <dt><span class="Pa">/compat/linux</span></dt>
- <dd>Linux run-time environment</dd>
- <dt><span class="Pa">/compat/linux/dev</span></dt>
- <dd>device file system, see <a class="Xr">devfs(4)</a></dd>
- <dt><span class="Pa">/compat/linux/dev/fd</span></dt>
- <dd>file descriptor file system mounted with the
- <code class="Cm">linrdlnk</code> option, see
- <a class="Xr">fdescfs(4)</a></dd>
- <dt><span class="Pa">/compat/linux/dev/mqueue</span></dt>
- <dd>symbolic link to a mqueuefs mount, see <a class="Xr">mqueuefs(4)</a></dd>
- <dt><span class="Pa">/compat/linux/dev/shm</span></dt>
- <dd>in-memory file system, see <a class="Xr">tmpfs(4)</a></dd>
- <dt><span class="Pa">/compat/linux/proc</span></dt>
- <dd>Linux process file system, see <a class="Xr">linprocfs(4)</a></dd>
- <dt><span class="Pa">/compat/linux/sys</span></dt>
- <dd>Linux kernel objects file system, see <a class="Xr">linsysfs(4)</a></dd>
-</dl>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
- ALSO</a></h1>
-<p class="Pp"><a class="Xr">brandelf(1)</a>, <a class="Xr">fdescfs(4)</a>,
- <a class="Xr">linprocfs(4)</a>, <a class="Xr">linsysfs(4)</a>,
- <a class="Xr">mqueuefs(4)</a>, <a class="Xr">pty(4)</a>,
- <a class="Xr">tmpfs(4)</a>, <a class="Xr">elf(5)</a></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
-<p class="Pp">Linux ABI support first appeared for i386 in
- <span class="Ux">FreeBSD 2.1</span>. Support for amd64 binaries first
- appeared in <span class="Ux">FreeBSD 10.3</span>. Support for arm64 binaries
- first appeared in <span class="Ux">FreeBSD 12.0</span>.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1>
-<p class="Pp">Support for some of the Linux-specific system calls and system
- call arguments is missing.</p>
-</section>
-</div>
-<table class="foot">
- <tr>
- <td class="foot-date">May 19, 2024</td>
- <td class="foot-os">FreeBSD 15.0</td>
- </tr>
-</table>