and by default just update the world, and dump a lost of packages
that are not removed. fixes #47.

We need the define for uint16

should really fix abuild-tar.

make the system audit compare only installed files, instead of
scanning the whole file system. also make it print only package
names with -q, so reinstalling modified packages becomes easy.

other wise cache_fd points to var/lib/apk and contains the real
installed db causing it to be loaded twice.

this way we never change cwd, and relative filenames are always
parsed consistently. this also helps filename construction in many
places. this patch also changes '--root' to override location of
all configuration to be in the new root. previously it depended
on the file which one was used.

remember to increment destination pointer; and munmap the proper
base address.

also take precautions in audit code if the db is missing the
checksum.

and use it for /etc/init.d by default. fixes #99.

so we avoid some malloc/free calls.

apparently it needs to have both PROT_READ and PROT_WRITE. and
it needs to be MAP_SHARED for the writing to be effective. oh,
and the data needs to be preallocated with ftruncate; otherwise,
one gets SIGBUS.

we don't want to do checksumming of existing files unless it's
in a protected directory. also, we keep the original file if it's
*modified*.

avoids some copying and system calls.

and force checksumming only when unpacking archive. otherwise
it's extra computation for nothing.

apparently the double colon rule dependencies affect only the
specific rule-set.

otherwise bad things happens. avoid this be checking end of
stream at the beginning of read.

and use that to figure if questions are allowed or not instead
of the verbosity level.

this dependency is now inserted automatically by abuild.

use the package 'installed_size' == 0 as a test instead for
dependency only packages.

this enables virtual packages and files specified from command
line to work on non-harddisk installs.

Otherwise will link(2) fail since it does not exist.

can't cancel an index reading or we lose signature checking.

when failed to load an existing index.

and do not remove modified configuration files unless --purge is
specified.

to check system files for changes.

fixes verification of non-repository packages while installing
them. this is final thing needed for full signing support
(fixes #46).

make sure cache is enabled on non-permanent rootfs setups.
some optimizations and fixes too.

smaller callback and less cases to check. also reintroduce the
oneshot digest flag, hopefully correct this time.

we might have done already something.

to not make hard error of untrusted or missing signatures