emrootfslib emrootfslib 3 EMDEBIAN-ROOTFS EMDEBIAN-ROOTFS emrootfslib Common functions for Emdebian root filesystems emrootfslib is intended solely for use on the build machine. Do not use these functions in second_stage_install ! emrootfslib requires perl! There should be no need to call pbuilder code within scripts that generate a root filesystem and bash code must not be used in emrootfslib. 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. 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. 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. 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. 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 that the $BUILDPLACE, $BUILDRESULT and $APTCACHE directories exist (used by empdebuild). Calls check_arch from Debian::DpkgCross using perl. The perl call dies if the specified string does not match a supported architecture. Modified version of the equivalent function in pbuilder-modules to extract the compressed chroot (used by empdebuild). Enforces a default of not installing recommended packages inside the chroot. 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. Prepare for unpacking and general dpkg work by setting up $TARGET/var/lib/dpkg/status and $TARGET/var/lib/dpkg/available. Ensure that $TARGET/proc and $TARGET/sys exist so that proc and sys can be mounted automatically. Ensure that $TARGET/var/log/ and $TARGET/var/spool exist so that various installation routines can proceed. 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. Adds "export DEBCONF_USE_CDEBCONF=true" to $TARGET/etc/profile for cdebconf support. 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. 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. 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. empbuilderlib was written by Neil Williams codehelp@debian.org. This manual page was written by Neil Williams codehelp@debian.org See also apt-cross (1), dpkg-cross (1), emdebian-tools (1), empdebuilderlib (3).