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fix: make LXC banner OS detection dynamic via /etc/os-release (#14269)

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* fix: derive LXC banner OS from os-release

Read os-release at login time for the generated LXC banner so OS display stays accurate after template changes or in-place upgrades. Prefer PRETTY_NAME with safe fallbacks to NAME, template defaults, and Unknown OS while preserving existing banner formatting.

Co-authored-by: Cursor <cursoragent@cursor.com>

* refactor: simplify dynamic LXC banner OS resolution

Reduce banner OS rendering to a minimal runtime os-release read with PRETTY_NAME/NAME fallbacks and Unknown OS default. Remove redundant OS rewrites from update_motd_ip now that OS display is resolved dynamically at login.

Co-authored-by: Cursor <cursoragent@cursor.com>

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Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Atahan Kucuk
2026-05-22 08:46:18 +03:00
committed by GitHub
parent 0e00444cb9
commit bc43c262a8
3 changed files with 18 additions and 8 deletions
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misc/build.func
-6
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@@ -217,22 +217,16 @@ update_motd_ip() {
# Only update if file exists and is from community-scripts
if [ -f "$PROFILE_FILE" ] && grep -q "community-scripts" "$PROFILE_FILE" 2>/dev/null; then
# Get current values
local current_os="$(grep ^NAME /etc/os-release | cut -d= -f2 | tr -d '"') - Version: $(grep ^VERSION_ID /etc/os-release | cut -d= -f2 | tr -d '"')"
local current_hostname="$(hostname)"
local current_ip="$(hostname -I | awk '{print $1}')"
# Escape sed special chars in replacement strings (& \ |)
current_os="${current_os//\\/\\\\}"
current_os="${current_os//&/\\&}"
current_hostname="${current_hostname//\\/\\\\}"
current_hostname="${current_hostname//&/\\&}"
current_ip="${current_ip//\\/\\\\}"
current_ip="${current_ip//&/\\&}"
# Update only if values actually changed
if ! grep -q "OS:.*$current_os" "$PROFILE_FILE" 2>/dev/null; then
sed -i "s|OS:.*|OS: \${GN}$current_os\${CL}\\\"|" "$PROFILE_FILE"
fi
if ! grep -q "Hostname:.*$current_hostname" "$PROFILE_FILE" 2>/dev/null; then
sed -i "s|Hostname:.*|Hostname: \${GN}$current_hostname\${CL}\\\"|" "$PROFILE_FILE"
fi