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linux: More man page tweaks

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Mention debootstrap(8) and improve the wording.

Reviewed By:	debdrup, emaste, Pau Amma
Sponsored By:	EPSRC
Differential Revision:	https://reviews.freebsd.org/D33772
This commit is contained in:
Edward Tomasz Napierala 2022-01-09 10:03:44 +00:00
parent 6d06bc688e
commit 595532a766
1 changed files with 15 additions and 14 deletions
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29
share/man/man4/linux.4
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@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd January 2, 2022
.Dd January 9, 2022
.Dt LINUX 4
.Os
.Sh NAME
@ -39,8 +39,8 @@ linux_enable="YES"
.Sh DESCRIPTION
The
.Nm
module provides limited Linux ABI (application binary interface) compatibility,
making it possible to run many unmodified Linux applications
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:
.Bl -bullet
@ -75,11 +75,13 @@ file systems.
.Pp
To install Linux shared libraries and system files into
.Pa /compat/linux ,
use the
either use the
.Pa emulators/linux_base-c7
port or the
.Dv linux_base-c7
package.
port or package,
or
.Xr debootstrap 8
installed from
.Pa sysutils/debootstrap .
.Pp
To avoid mounting Linux-specific filesystems at startup, add the following
line to the
@ -132,18 +134,17 @@ From a user perspective, this makes
work for Linux executables.
Defaults to 0.
.It Va compat.linux.setid_allowed
Disable handling of set-user-ID and set-group-ID mode bits for the new
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, new Linux images always use credentials of the program
When set to 0, new Linux images always use credentials of the program
that issued the
.Xr execve 2
call, regardless of the image file mode.
Defaults to 1.
.Pp
This might be reasonable or even required, because
.Fx
does not emulate Linux environment completely, and missed features
could become holes.
does not emulate the Linux environment completely, and missed features
may result in security vulnerabilities.
Defaults to 1.
.El
.Sh FILES
.Bl -tag -width /compat/linux/dev/shm -compact
@ -176,7 +177,7 @@ Linux kernel objects file system, see
.Xr linsysfs 5 ,
.Xr tmpfs 5
.Sh HISTORY
Linux ABI support first appeared in
Linux ABI support first appeared for i386 in
.Fx 2.1 .
Support for amd64 binaries first appeared in
.Fx 10.3 .