empbuilderlib(3)
NAME
empbuilderlib - Common functions for Emdebian chroots
DESCRIPTION
empbuilderlib is intended solely for use on the build machine. Do not
use these functions in second_stage_install ! empbuilderlib requires
perl!
AUTOCLEAN_APTCACHE
Same as the pbuilder option but run by default in empdebuild to remove
obsolete .deb archives from the apt cache directories used by
empdebuild.
BASIC_ETC_FSTAB
Removing packages from the normal Debian debootstrap set can mean that
certain critical files can be omitted. basic_etc_fstab creates a basic
version of $TARGET/etc/fstab where it does not already exist.
BASIC_GROUP_SETUP
Removing packages from the normal Debian debootstrap set can mean that
certain critical files can be omitted. basic_group_setup creates a
basic version of $TARGET/etc/group where it does not already exist.
BASIC_PASSWD_SETUP
Removing packages from the normal Debian debootstrap set can mean that
certain critical files can be omitted. basic_passwd_setup creates a
basic version of $TARGET/etc/passwd where it does not already exist.
BUSYBOX_INITTAB
Note: this function overwrites an existing $TARGET/etc/inittab
busybox does not support runlevels and so the /etc/inittab file needs
to be modified to support busybox. Currently, this function overwrites
an existing $TARGET/etc/inittab - this is likely to change in future
versions.
BUSYBOX_RCS
Note: this function overwrites an existing $TARGET/etc/init.d/rcS
busybox does not support runlevels and so the /etc/init.d/rcS script
needs to be modified to support busybox. Currently, this function
overwrites an existing $TARGET/etc/init.d/rcS - this is likely to
change in future versions.
CHECK_DIRS
Check that the $BUILDPLACE, $BUILDRESULT and $APTCACHE directories
exist (used by empdebuild).
CHECKARCH
Calls check_arch from Debian::DpkgCross using perl. The perl call dies
if the specified string does not match a supported architecture.
COPY_HOST_CONFIGURATION
Copy hosts, hostname and resolv.conf from the system /etc/ directory
and adapts /etc/hostname to use a different name (emdebian-$ARCH).
CREATE_EMDEBIANTGZ
Modified version of the equivalent function in pbuilder-modules to
extract the compressed chroot (used by empdebuild).
DISABLE_APT_RECOMMENDS
Enforces a default of not installing recommended packages inside the
chroot.
EXTRA_ETC_RCD
Removing packages from the normal Debian debootstrap set can mean that
certain critical files can be omitted. extra_etc_rcd creates a basic
version of $TARGET/etc/rcS.d where it does not already exist.
EXTRACTEMBUILDPLACE
Modified version of the equivalent function in pbuilder-modules to
extract the compressed chroot (used by empdebuild).
MAKE_DPKG_DIRS
Prepare for unpacking and general dpkg work by setting up
$TARGET/var/lib/dpkg/status and $TARGET/var/lib/dpkg/available.
PREPARE_PROC
Ensure that $TARGET/proc and $TARGET/sys exist so that proc and sys can
be mounted automatically.
PREPARE_VAR
Ensure that $TARGET/var/log/ and $TARGET/var/spool exist so that
various installation routines can proceed.
SET_APPROX_TIME
Normal Debian installations have a network connection and typical
Debian desktop boxes also have a backup battery. Some embedded machines
do not have either of these systems, making it impossible to store or
retrieve even a vaguely close indication of the current time.
set_approx_time uses the systems available on the build machine to
store an approximate indication of the time that the root filesystem
was created and write that time to a file in the root filesystem
itself. For most purposes, this is sufficient for the purposes of
setting up the root filesystem to the point where a network connection
can be created and a call can be made to an internet clock using
ntpdate-debian.
SET_CDEBCONF_DEFAULT
Adds "export DEBCONF_USE_CDEBCONF=true" to $TARGET/etc/profile for
cdebconf support.
SYMLINK_RCS
Call repeatedly to create init symlinks, using the template
$TARGET/etc/rcS.d/S$number$file
- file
- file is the filename in $TARGET/etc/init.d/
- number
- number is the number for the link in the init sequence.
UNPACK_DEBOOTSTRAP
Specialized routine that replaces the normal second stage of
debootstrap (you may consider it a series of hacks if you prefer).
unpack uses dpkg to extract the files from the .deb package and process
the control information. Unlike dpkg --unpack, the unpack routine does
NOT run any maintainer scripts which would inevitably fail in a cross
built environment. Instead, it updates the relevant dpkg status and
database files in the root filesystem and leaves the package in the
unpacked state.
unpack_debootstrap also sets up the busybox applets - future versions
may split this functionality into a separate function.
unpack_debootstrap also performs checks on /usr/sbin/invoke-rc.d and
/usr/sbin/update-rc.d - future versions may split this functionality
into a separate function.
Finally, unpack_debootstrap removes all .deb package files from
/var/cache/apt/archives. The remaining task (dpkg --configure -a) is
performed via emsecondstage.
X_FEIGN_INSTALL
Copied from debootstrap suite scripts to make a basic installation of a
.deb package - although this is the basis of unpack_debootstrap, it is
only really used for dpkg itself.
AUTHOR
empbuilderlib was written by Neil Williams <codehelp@debian.org>.
This manual page was written by Neil Williams <codehelp@debian.org>
SEE ALSO
See also apt-cross (1), dpkg-cross (1), emdebian-tools (1).
AUTHOR
Emdebian
- Neil Williams
- Author.