vasilito
4325590686
Includes: init (PID 1), hiperiso-lib.sh, qemu_launch.sh, hw_collect.sh, kvm_check.sh, fallback_boot.sh, log_flush.sh, conf_replace.sh, make_floppy.sh. 13-phase boot timing, 18 QEMU HMP commands, network pcap capture.
67 lines
2.3 KiB
Bash
Executable File
67 lines
2.3 KiB
Bash
Executable File
#!/bin/sh
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# ============================================================
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# log_flush.sh -- Async ring-buffer to USB flush daemon
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#
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# Runs in the background, calling sync() on the log directory
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# every 5 seconds so boot logs survive even on a hard reset.
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# Writes a periodic heartbeat so agents can detect hung sessions.
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# Exits cleanly when the /tmp/hiperiso_done sentinel appears,
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# writing a final flush marker.
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#
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# Usage: log_flush.sh <log_dir>
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# ============================================================
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LOG_DIR="${1:-}"
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INTERVAL=5
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SENTINEL="/tmp/hiperiso_done"
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HEARTBEAT_INTERVAL=12
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if [ -z "$LOG_DIR" ]; then
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printf '[log_flush] FATAL: no log directory specified\n'
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printf '[log_flush] usage: log_flush.sh <log_dir>\n'
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exit 1
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fi
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if [ ! -d "$LOG_DIR" ]; then
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printf '[log_flush] FATAL: log directory does not exist: %s\n' "$LOG_DIR"
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exit 1
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fi
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printf '[log_flush] Started -- syncing %s every %ds\n' "$LOG_DIR" "$INTERVAL"
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_flush_count=0
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while true; do
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# ── Check sentinel: exit gracefully ──────────────────────
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if [ -f "$SENTINEL" ]; then
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printf '[log_flush] Sentinel detected, performing final sync...\n'
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sync
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printf '[log_flush] Exiting after %d sync cycles\n' "$_flush_count"
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exit 0
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fi
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# ── Check if log directory still accessible ──────────────
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# (USB might have been unplugged)
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if [ ! -d "$LOG_DIR" ]; then
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printf '[log_flush] WARNING: log dir vanished (USB unplugged?) -- waiting for sentinel\n'
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sleep "$INTERVAL"
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continue
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fi
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# ── Flush dirty pages to the USB device ──────────────────
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sync 2>/dev/null
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_flush_count=$(( _flush_count + 1 ))
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# ── Write periodic heartbeat ─────────────────────────────
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if [ $(( _flush_count % HEARTBEAT_INTERVAL )) -eq 0 ]; then
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_up=$(cut -d' ' -f1 /proc/uptime 2>/dev/null)
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printf 'cycle=%d uptime=%s\n' "$_flush_count" "${_up:-0}" \
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> "${LOG_DIR}/HEARTBEAT" 2>/dev/null
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printf '[log_flush] cycle %d (%d min) -- OK\n' \
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"$_flush_count" "$(( _flush_count / HEARTBEAT_INTERVAL ))"
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fi
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sleep "$INTERVAL"
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done
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