Two webui-data generators wrote to a temp file via bare `cat > "$temp_file"`
then `runFileOp mv` to the final path. The temp file's path sits inside
$containers_dir/libreportal/frontend/data/<x>/generated/ — owned by the
dockerinstall user (the data plane). The generators run as the manager,
who can't open paths under that tree for write, so every WebUI update
hit:
webui_backup_migrate.sh: line 125: …/migrate.json.tmp.<pid>: Permission denied
mv: cannot stat '…/migrate.json.tmp.<pid>': No such file or directory
webui_peers.sh: line 23: …/peers.json.tmp.<pid>: Permission denied
mv: cannot stat '…/peers.json.tmp.<pid>': No such file or directory
Pipe the heredoc through `runFileWrite "$output_file"` instead — same
shape the 5 sibling generators in this dir (backup_app_status,
backup_locations, backup_passwords, backup_snapshots, backup_dashboard)
already use. runFileWrite routes the write via the install user that
owns the data tree, so the file lands on disk in one step (no temp +
mv dance needed). The unused `local temp_file=...` declarations dropped
out cleanly.
The trailing `runFileOp chmod 644 "$output_file"` stays — it's the only
guarantee the WebUI container (which reads these files RO) sees them as
world-readable regardless of dockerinstall's umask.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
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