On Thu, Dec 30, 2021 at 02:27:04AM -0500, Matthew Miller wrote: > On Wed, Dec 29, 2021 at 03:17:42PM +0000, Tom Hughes via devel wrote: > > At this point somebody will no doubt argue that /usr changes on a > > package update and that the RPM database is a static definition of > > the currently installed OS files, but evidence says otherwise: > > > > % ls -l /var/lib/rpm > > > > total 378M > > > > -rw-r--r--. 1 root root 378M Dec 28 16:08 rpmdb.sqlite > > -rw-r--r--. 1 root root 32K Dec 29 09:27 rpmdb.sqlite-shm > > -rw-r--r--. 1 root root 0 Dec 28 16:08 rpmdb.sqlite-wal > > > > > > While "Dec 28 16:08" is indeed the last time I updated that machine > > it seems one of the files has changed more recently - no idea what > > triggered that but clearly the files are not static between updates. > > That is a sqlite write-ahead log shared memory file used to coordinate > access between concurrent clients. Someone who knows more about the depths > of DNF and RPM than me will need to comment, but it looks like `dnf list` > touches it -- even though `rpm -qa` doesn't. $ sudo strace -efile dnf list ... openat(AT_FDCWD, "/var/lib/rpm/rpmdb.sqlite-wal", O_RDWR|O_CREAT|O_NOFOLLOW|O_CLOEXEC, 0644) = 4 openat(AT_FDCWD, "/var/lib/rpm/rpmdb.sqlite-shm", O_RDWR|O_CREAT|O_NOFOLLOW|O_CLOEXEC, 0644) = 5 ... What happens if /var/lib is read-only? Changing (fixing?) this would be a pre-requisite to this proposal, we don't want 'dnf list' to break. Zbyszek _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
