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Re: pkg/56597 (Deinstallation of compat90 destroys netbsd-9)

The following reply was made to PR pkg/56597; it has been noted by GNATS.

From: Havard Eidnes <>
Subject: Re: pkg/56597 (Deinstallation of compat90 destroys netbsd-9)
Date: Sun, 02 Jan 2022 15:34:14 +0100 (CET)

 That was .. unexpected.
 I see the submitter reports with 9.99.85.  By the looks of it,
 the compat90 package was generated against
 NetBSD 9.99.92 (GENERIC) #0: Fri Nov 12 15:12:11 UTC 2021
 Was there any major version bumps between 9.99.85 and 9.99.92?
 Hm, the package has (among others)
 but I also see (practical experience from a mistake I did earlier
 today) that the package can be installed on NetBSD 9.2.  How is
 that even possible?!?  And the above pattern doesn't match
 9.99.<x> either, I suppose?
 Perhaps the above pattern should have been NetBSD-9.99.*, but
 then again, the submitter reported 9.99.85 and still had the
 problem?  Also, 9.99.85 is not netbsd-9, so it's not entirely
 clear against which version this report is submitted.
 When I installed compat90 on NetBSD 9.2, I did notice that the
 installation noted that "target exists", perhaps unsurprisingly.
 Hm, seems like the +ROOT_ACTIONS script of the package, from
 ../compat_netbsd/INSTALL.ELF is responsible for managing the
 symlinks, it will not replace a file or preexisting symlink, but
 on de-install and the target was already a symlink, it will be
 summarily removed...  Perhaps the INSTALL.ELF script should as an
 added level of security verify that the symlink actually points
 to the intended target before removing it, instead of just
 testing whether it's a symlink, given the prevalent use of
 symlinks in shared library handling?
 So, can someone please explain what ONLY_FOR_PLATFORM should look
 like to prevent installation of this on netbsd-9, and possibly on
 any -current older than 9.99.92?
 A separate question is also why compat90 was deemed to be
 required on netbsd-9, presumably by other parts of pkgsrc?  That
 should not be needed AFAIK; there's not been any major shared lib
 bumps between 9.0 to 9.2 or even going to 9.2_STABLE.
 - H=E5vard

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