https://gitlab.synchro.net/main/sbbs/-/commit/4cf8e2f01b9eb7f374393b9e
Modified Files:
src/sbbs3/upgrade_to_v319.c
Log Message:
upgrade_to_v319: read the legacy index before smb_create() destroys the base

smb_create() truncates .shd to the base header, and .sdt and .sid to zero.
It was called before the directory's legacy .ixb was opened, so a directory with no legacy data to convert had its file base emptied and was only then skipped -- the check that should have made it a no-op ran after the
destruction it was meant to prevent.

Under -f that turned "reset this base to its pre-3.19 contents" into "erase it", which also means removing the now-vestigial .ixb/.dat/.exb/.dab files
made an accidental run strictly more destructive rather than safer.

Read and validate the .ixb first and skip the directory before touching anything; only then open the extended-description file and create the base.
The early-exit paths no longer need closeextdesc() because the file is not
open yet, and the smb_create() failure path now releases the index buffer
and the extended-description file, which it does have open by that point.

A directory with no legacy data is now left untouched rather than
initialized as an empty v3.19 base. That is harmless: smb_open_dir()
already creates any file base whose .shd is empty, so such a directory is initialized on first use.

Complements 46e06da739 (desk-5-these, 2026-05-27), which stopped a run
without -f from clobbering an already-upgraded base.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
--- SBBSecho 3.37-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)