#!/bin/sh
# statuspage/render.sh
# Orchestrator + renderer for the dandokmang status console.
#
# Runs every executable script in checks/, collects their JSONL rows, groups
# them by section, and writes a static HTML status page. A check script
# that fails or emits garbage is reported as a down/warn row instead of
# aborting the whole render. See README.md for the JSONL contract that
# check scripts must follow.
set -u
SELF_DIR=$(cd "$(dirname "$0")" && pwd)
CHECKS_DIR="$SELF_DIR/checks"
OUT=${STATUSPAGE_OUT:-/usr/local/www/status/index.html}
HOST=$(hostname)
NOW=$(date "+%Y-%m-%d %H:%M:%S %Z")
. "$SELF_DIR/lib/common.sh"
JSONL=$(mktemp)
AWKFILE=$(mktemp)
trap 'rm -f "$JSONL" "$AWKFILE"' EXIT INT TERM
# valid_jsonl OUTPUT
# Cheap structural check: every non-empty line must look like one of our
# flat {"section":.., "label":.., "value":.., "status":..} objects. This
# isn't a general JSON validator - it doesn't need to be, since the only
# producer of this format is json_line() in lib/common.sh.
valid_jsonl() {
bad=$(printf '%s\n' "$1" | grep -v '^$' | \
grep -Evc '^\{.*"section"[[:space:]]*:.*"label"[[:space:]]*:.*"value"[[:space:]]*:.*"status"[[:space:]]*:.*\}$')
[ "$bad" -eq 0 ]
}
for script in "$CHECKS_DIR"/*.sh; do
[ -e "$script" ] || continue
[ -x "$script" ] || continue
name=$(basename "$script")
output=$("$script" 2>/dev/null)
rc=$?
if [ "$rc" -ne 0 ]; then
json_line "checks" "$name" "check exited with status $rc" "down"
elif [ -z "$output" ]; then
json_line "checks" "$name" "no output" "warn"
elif ! valid_jsonl "$output"; then
json_line "checks" "$name" "malformed JSONL output" "warn"
else
printf '%s\n' "$output"
fi
done >"$JSONL"
# Render with awk: group rows by section (fixed order hardware/host
# services/jails, then any other section in first-seen order - e.g.
# "checks" for broken-script rows), preserving row order within a section.
cat >"$AWKFILE" <<'AWKEOF'
function jsonval(line, key, pat, start, i, c, nc, res) {
pat = "\"" key "\"[ \t]*:[ \t]*\""
if (!match(line, pat)) return ""
start = RSTART + RLENGTH
res = ""
for (i = start; i <= length(line); i++) {
c = substr(line, i, 1)
if (c == "\\") {
nc = substr(line, i + 1, 1)
if (nc == "n") res = res "\n"
else res = res nc
i++
continue
}
if (c == "\"") break
res = res c
}
return res
}
function htmlesc(s) {
gsub(/&/, "\\&", s)
gsub(//, "\\>", s)
return s
}
function sqclass(status) {
if (status == "ok") return "green"
if (status == "warn") return "yellow"
if (status == "info") return "gray"
return "red"
}
BEGIN {
order[1] = "hardware"; order[2] = "host services"; order[3] = "jails"
norder = 3
for (i = 1; i <= norder; i++) known[order[i]] = 1
}
{
if ($0 == "") next
section = jsonval($0, "section")
label = jsonval($0, "label")
value = jsonval($0, "value")
status = jsonval($0, "status")
if (section == "") next
if (!(section in seen)) {
seen[section] = 1
if (!(section in known)) { norder++; order[norder] = section }
}
n = ++count[section]
L[section, n] = label
V[section, n] = value
S[section, n] = status
}
END {
print ""
print ""
print ""
print "" htmlesc(host) " status"
print ""
print ""
print ""
print ""
print "" htmlesc(host) "
"
print "updated " htmlesc(now) "
"
for (i = 1; i <= norder; i++) {
sect = order[i]
if (!(sect in count)) continue
print "" htmlesc(sect) "
"
print ""
for (j = 1; j <= count[sect]; j++) {
valcell = (V[sect, j] == "") ? "" : "| " htmlesc(V[sect, j]) " | "
print "| " htmlesc(L[sect, j]) " | " valcell "
"
}
print "
"
}
print ""
print ""
}
AWKEOF
awk -v host="$HOST" -v now="$NOW" -f "$AWKFILE" "$JSONL" >"$OUT"