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authorluigi <luigi@FreeBSD.org>2006-01-31 21:21:02 +0000
committerluigi <luigi@FreeBSD.org>2006-01-31 21:21:02 +0000
commit7fe6d13c28a5d890bba5f41ec1bc98f1ce65d41f (patch)
treee3b84324bdaf0705f0245d7fa6c53a0777741485 /share/man/man8
parentc97f294f76c2a88b6fad9b510f6bb82b7781d287 (diff)
downloadFreeBSD-src-7fe6d13c28a5d890bba5f41ec1bc98f1ce65d41f.zip
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some updates to the manpage.
remove references to mdconfig/vnconfig, and remove some of the references to floppies since they are rarely used at all now.
Diffstat (limited to 'share/man/man8')
-rw-r--r--share/man/man8/picobsd.8118
1 files changed, 39 insertions, 79 deletions
diff --git a/share/man/man8/picobsd.8 b/share/man/man8/picobsd.8
index aba665b..bfe54dc 100644
--- a/share/man/man8/picobsd.8
+++ b/share/man/man8/picobsd.8
@@ -1,15 +1,15 @@
.\" -*- nroff-fill -*-
.\" $FreeBSD$
-.Dd March 9, 2002
+.Dd January 31, 2006
.Os
.Dt PICOBSD 8
.Sh NAME
.Nm picobsd
-.Nd floppy disk based FreeBSD system
+.Nd building small FreeBSD disk images
.Sh SYNOPSIS
.Nm
.Op Ar options
-.Op Ar floppy-type Op Ar site-name
+.Op Ar config-name Op Ar site-name
.Sh DESCRIPTION
The
.Nm
@@ -17,7 +17,8 @@ utility is a script which produces a minimal implementation of
.Fx
(historically called
.Nm PicoBSD )
-which typically fits on one floppy disk, or can be downloaded as a
+which typically fits on a small media such as a floppy disk,
+or can be downloaded as a
single image file from some media such as CDROM, flash memory, or through
.Xr etherboot .
.Pp
@@ -29,7 +30,8 @@ cross-build images with different source trees than the one
in the server, it can be extremely useful to developers to
test their code without having to reinstall the system.
.Pp
-The boot media (typically a floppy disk) contains a boot loader and a
+The boot media (historically a floppy disk, but also small
+CDROM or USB keys) contains a boot loader and a
compressed kernel which includes a memory file system.
Depending on the media, it might also contain a number of
additional files, which can be updated at run time, and are
@@ -55,7 +57,9 @@ Use the source tree at
.Ar SRC_PATH
instead the one at
.Pa /usr/src .
-This can be useful for cross-building floppy images.
+This can be useful for cross-building
+.Nm
+images.
When using this option, you must also create and initialize the subtree at
.Ao Ar SRC_PATH Ac Ns Pa /../usr
with the correct header files, libraries, and tools (such as the
@@ -84,12 +88,12 @@ subtree as necessary to subsequently build
images.
.It Fl -modules
Also build kernel modules.
-These are not stored on the floppy
+These are not stored on the
+.Nm
image but are left available in the build directory.
.It Fl n
-Make the script non-interactive.
-Do not show the initial menu, and
-proceed to the build process without requiring user input.
+Make the script non-interactive, skipping the initial menu
+and proceeding with the build process without requiring user input.
.It Fl v
Make the script verbose, showing
commands to be executed and waiting for user
@@ -109,14 +113,16 @@ as a fully functional system.
.It Fl -no_all_in_mfs
Leaves files contained in the
.Pa floppy.tree
-on the floppy image, so they can be loaded separately
+on the
+.Nm
+image, so they can be loaded separately
from the kernel (and updated individually to
-customize the floppy image).
+customize the image).
.It Fl -floppy_size Ar size
-Set the size of the floppy image.
-Values other
-than 1440 can be used for images that are burned
-into a CDROM.
+Set the size of the disk image.
+Typical values for a floppy disk are 1440 or 2880,
+but other values can be used for other media (flash memories,
+CDROM, network booted kernels).
.It Fl c , clean
Clean the product of previous builds.
.El
@@ -152,57 +158,26 @@ sources reside in the hierarchy
.Pa /usr/src/release/picobsd .
In the following discussion, all relative path names are relative to this
directory.
-The
-.Nm
-build process has changed slightly over time, in order to cope
-with the unavoidable increase of code size, which requires more and more
-tricks to cram as much as possible onto the floppies.
-Starting from
-.Fx 4.3 ,
-the supported build script is
+.Pp
+The supported build script is
.Pa /usr/src/release/picobsd/build/picobsd
-which can be run from anywhere.
+which can be run from anywhere, and relies on the
+.Xr sysutils/makefs
+port to build a filesystem without requiring
+.Xr mdconfig
+or root privileges to mount a filesystem.
When run in interactive mode (the default without the
-.Fl -n
+.Fl n
option), the script will let you configure the various parameters
-used to build the floppy image.
-The following kinds of floppy are envisaged, and we try to keep them
-functional and fitting in the 1.44MB floppy despite the unavoidable
-increases in the size of the kernel and its applications:
-.Bl -hang -width ".Pa bridge"
-.It Pa bridge
-configuration suitable for bridges, routers and firewalls.
-.El
-.Pp
-The following configurations are also present but for reference
-only.
-Many of them are irremediably out of date and no effort
-is done to keep them in good shape:
-.Bl -hang -width ".Pa bridge"
-.It Pa dial
-configuration suitable for dial-out
-.Pq Xr ppp 8
-networking.
-.It Pa isp
-configuration suitable for dial-in
-.Pq Xr ppp 8
-networking.
-.It Pa net
-configuration suitable for general networking.
-.It Pa router
-configuration suitable for use as a router.
-This particular configuration
-aims to work on minimal hardware.
-.El
-.Pp
-These configurations serve only as examples for
-your own modification.
-Not all of them have been tested,
-and you might need small tweaks to the configuration
-files to make them work or even fit into the
-available disk space as code size increases.
+used to build the PicoBSD image. An image is configured
+using the files and directories described below.
+The base system contains a template, called
+.Pa bridge
+for historical reasons,
+that can be used as a base for building various kinds
+of network appliances.
.Pp
-You can define your own floppy type, by creating a directory
+You can define your own PicoBSD configuration, by creating a directory
with a name of your choice (e.g.\&
.Pa FOO )
which contains
@@ -343,8 +318,6 @@ More information on the build process can be found in the
comments in the
.Nm
script.
-Sample configurations can be found in
-.Pa /usr/src/release/picobsd/ Ns Ao Ar floppy-type Ac Ns Pa /
.Sh USING ALTERNATE SOURCE TREES
The build script can be instructed to use an alternate source tree
using the
@@ -380,7 +353,7 @@ a new image can be produced by simply running
.Dl "picobsd --src FOO/src -n -v bridge"
.Pp
whereas if the change affects include files or libraries
-you first need to update them, e.g.\& by running first
+you first need to update them, e.g.\& by re-running
.Pp
.Dl "picobsd --src FOO/src --init # this is needed only once"
.Pp
@@ -665,19 +638,6 @@ Man page and
created by
.An Greg Lehey Aq grog@lemis.com .
.Sh BUGS
-In order to build
-.Nm ,
-the kernel of the system on which it is built must have the
-.Xr vn 4
-driver installed.
-.Pp
-The build process must be run as
-.Dq root
-because of the need of running
-.Xr mdconfig 8 Ns / Ns Xr vnconfig 8
-and
-.Xr mount 8 .
-.Pp
Building
.Nm
is still a black art.
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