backupLocationLocalGuard (engine-agnostic, in location_paths.sh), wired into the
dispatcher before init, readiness, and every backup write (engineInitLocation /
engineEnsureLocationReady / engineBackupApp):
- Filesystem warning: the ownership model chowns the repo to the backup user, which
needs POSIX permissions — warn (non-fatal) on FAT/exFAT/NTFS via findmnt FSTYPE.
- Mount-presence refusal: a location with CFG_BACKUP_LOC_<idx>_REQUIRE_MOUNT=true
(an external/removable disk) is refused when its path isn't on a real mount
(findmnt TARGET is '/' or unknown) — so an unplugged drive never silently fills
the system disk. Opt-in; default false leaves on-disk locations unaffected.
New REQUIRE_MOUNT field documented in the location.config template (location_add.sh)
so it surfaces on the Locations page. Verified: REQUIRE_MOUNT+unmounted refuses;
default allows; non-local no-ops.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
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