c89c73ee84
User hit `/usr/local/bin/veilor-installer: line 33: /usr/bin/tee: input/output error` on real-hardware install. Cause: LOG was `/var/log/veilor-installer.log`, which on the live ISO is backed by an overlay over squashfs. A bad sector / flaky USB → tee write fails → process substitution dies → installer aborts before the menu renders. Two changes: 1. Move LOG to /run/veilor-installer.log — pure tmpfs, never touches the live medium. Same path also unaffected by /var fill or overlay weirdness. 2. Wrap the `exec > >(tee -a $LOG) 2>&1` redirect in a writability probe. If the log can't be appended to (tmpfs OOM, fd exhaustion, anything), skip the tee and run the installer without on-disk persistence rather than crashing. Persistence is a nice-to-have for post-mortem debugging; the installer running is the must-have. This inverts the priority correctly. |
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