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fix(install): make one-shot retry() retry, and drop root grants on user files (#606)

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retry() in one-shot-install.sh used `if ! "$@"; then status=$?`, where $? is
the status of the negation -- always 0. A failed command was never retried
and retry() reported success, so a failed `git clone` carried on until a
later check noticed the missing checkout. It now retries (3 attempts) and
returns the command's status. The two apt steps stay non-fatal: warning and
continuing is what they effectively did before, and making them fatal would
stop installs that work today. A clone that keeps failing stops the install,
as it already did, just sooner and with the one-shot's own error message.

Both installers granted the web user NOPASSWD root on display_controller.py,
start_display.sh and stop_display.sh. Those files are owned by the user after
Step 11's chown, so the grant let the web user rewrite them and run them as
root, and nothing ever ran them through sudo. Removed from both installers,
with a test that every project file granted as root is a root-owned
fix_perms helper.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-09-23 10:34:20 -04:00
committed by GitHub
co-authored by Claude Opus 5.5
parent 342e9164b8
commit e1ce7189f1
5 changed files with 102 additions and 25 deletions
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scripts/install/configure_web_sudo.sh
-9
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@@ -111,13 +111,6 @@ TEMP_SUDOERS="/tmp/ledmatrix_web_sudoers_$$"
echo "$WEB_USER ALL=(ALL) NOPASSWD:NOEXEC: $JOURNALCTL_PATH -t ledmatrix *"
fi
# Required: python3, bash
# NOTE: display_controller.py/start_display.sh/stop_display.sh live at the
# project root, not under scripts/install/ (where this script lives) —
# must use PROJECT_ROOT here, not PROJECT_DIR.
echo "$WEB_USER ALL=(ALL) NOPASSWD: $PYTHON_PATH $PROJECT_ROOT/display_controller.py"
echo "$WEB_USER ALL=(ALL) NOPASSWD: $BASH_PATH $PROJECT_ROOT/start_display.sh"
echo "$WEB_USER ALL=(ALL) NOPASSWD: $BASH_PATH $PROJECT_ROOT/stop_display.sh"
echo ""
echo "# Allow web user to remove plugin directories via vetted helper script"
echo "# The helper validates that the target path resolves inside plugin-repos/ or plugins/"
@@ -155,8 +148,6 @@ echo "- Start/stop/restart the ledmatrix service"
echo "- Enable/disable the ledmatrix service"
echo "- Check service status"
echo "- View system logs via journalctl"
echo "- Run display_controller.py directly"
echo "- Execute start_display.sh and stop_display.sh"
echo "- Reboot and shutdown the system"
echo "- Remove plugin directories (for update/uninstall when root-owned files block deletion)"
echo "- Install plugin/base requirements.txt as root (so ledmatrix.service can see them)"