Am Mittwoch, den 04.03.2020, 07:38 +0100 schrieb Johannes Schauer: > Hi, > > Quoting Benjamin Drung (2020-03-03 17:05:44) > > Am Mittwoch, den 22.01.2020, 21:40 +0100 schrieb Johannes Schauer: > > > Quoting Benjamin Drung (2020-01-22 13:23:36) > > > > Am Mittwoch, den 22.01.2020, 13:13 +0100 schrieb Johannes > > > > Schauer: > > > > > Quoting Benjamin Drung (2020-01-22 12:58:38) > > > > > > when I set TMPDIR to a directory that has mode 0755, > > > > > > mmdebstrap > > > > > > will fail: > > > > > > > > > > > > ``` > > > > > > $ ls -ld . > > > > > > drwxr-xr-x 3 bdrung bdrung 80 Jan 22 12:43 . > > > > > > $ TMPDIR=$(pwd) mmdebstrap buster buster.tar.xz > > > > > > I: automatically chosen mode: unshare > > > > > > > > > > you are using the unshare mode. This means that your > > > > > temporary > > > > > directory needs > > > > > to be accessible by the unshared user. Evidently it is not. I > > > > > don't > > > > > think there > > > > > is anything that mmdebstrap can do about it. > > > > > > > > mmdebstrap could create a temporary directory, change the mode > > > > to > > > > 1777 and > > > > let unshare use that, couldn't it? > > > > > > but that's not where the error comes from. From the output you > > > posted > > > in your > > > report it seems like mmdebstrap is not able to create the > > > temporary > > > directory > > > at all. Obviously it cannot change permissions of something that > > > doesn't exist. > > > I don't think mmdebstrap should attempt touching the permissions > > > of > > > the $TMPDIR > > > directory. > > > > From the log from the initial report: > > > > I: using /tmpfs/foo/mmdebstrap.wYxMFPcZHA as tempdir > > > > This directory is created and owned by unshared user. Afterwards > > mmdebstrap tries to create another temporary directory in > > /tmpfs/foo > > (instead of /tmpfs/foo/mmdebstrap.wYxMFPcZHA) and fails. > > > > I expect that mmdebstrap would succeed if it would create > > additional > > temporary directories in that initial > > /tmpfs/foo/mmdebstrap.wYxMFPcZHA > > directory. > > ah, now I understood what you mean. The proper solution would not be > to change > its mode to 1777 but to change its owner to the unshared user in the > same way > as it is done for /tmpfs/foo/mmdebstrap.wYxMFPcZHA in your example. > > But there is a simpler way. The only time that a temporary file is > created as > the unshare user is when the temporary apt.conf is created. That file > could > just be created in /tmpfs/foo/mmdebstrap.wYxMFPcZHA/tmp/ and the > problem would > be solved. > > The only thing that still puzzles me is the output you pasted. If it > was really > the apt.conf failing, then the error should be "cannot open apt.conf: > ..." but > that's not in your output. I'm also puzzled by your line number 1178 > as that > line has nothing useful over here.
I rerun my example using mmdebstrap from git master and it complained
about line 1185:
my ($conf, $tmpfile) = tempfile(UNLINK => 1)
or error "cannot open apt.conf: $!";
I don't know why it did not print "cannot open apt.conf" in this case.
--
Benjamin Drung
DevOps Engineer and Debian & Ubuntu Developer
Platform Integration (IONOS Cloud)
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