Hi,
2015-11-29 13:29 Axel Beckert:
Package: aptitude
Version: 0.7.4-2
Hi,
on the commandline as well in the TUI, aptitude throws a warning when
trying to download and display a changelog as root as well as user:
As root:
# aptitude changelog apt > /dev/null
W: Can't drop privileges for downloading as file
'/tmp/aptitude-root.15442:qGi6mn/aptitudeDownload6J+8J:+PsVGmTNm^.^::Lz:%.Hi55VKA'
couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
#
That's because libapt attempts to drop privileges and perform operations
as "_apt" user, but since the directory is owned by root, it cannot drop
them (otherwise it would fail to write) and emits the warning.
So
As user:
% aptitude changelog apt > /dev/null
W: chmod 0700 of directory /var/lib/apt/lists/partial failed -
SetupAPTPartialDirectory (1: Operation not permitted)
W: chmod 0700 of directory /var/cache/apt/archives/partial failed -
SetupAPTPartialDirectory (1: Operation not permitted)
I suppose that as normal user, libapt doesn't do the check mentioned
above (perhaps because uid!=root and assumes that it's "_apt").
In my system, both dirs' permissions are 700 and owned by _apt:root, it
doesn't emit any error and changelog works fine, no warnings.
It is though able to display the changelog in all cases I tested.
Yes, specially in the case of root it shouldn't stop from actually
showing the changelog. It's just a warning that will not drop the
privileges, to avoid failing with the operation.
Cheers.
--
Manuel A. Fernandez Montecelo <[email protected]>
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