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Fix grgsm_scanner stdout buffering and increase scan timeout

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grgsm_scanner fully buffers stdout when piped, so scan results never
reach Python until the buffer fills or process exits. Wrapping with
stdbuf -oL forces line-buffered output for real-time data streaming.

Also increased scan timeout from 120s to 300s since scanning 4 bands
legitimately takes 2-3 minutes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Smittix
2026-02-08 16:30:51 +00:00
parent cd5f1464b6
commit 2dc4940ca2
1 changed files with 4 additions and 2 deletions
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routes/gsm_spy.py
+4 -2
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@@ -373,7 +373,9 @@ def start_scanner():
return jsonify({'error': 'grgsm_scanner not found. Please install gr-gsm.'}), 500 return jsonify({'error': 'grgsm_scanner not found. Please install gr-gsm.'}), 500
try: try:
cmd = ['grgsm_scanner'] # Use stdbuf to force line-buffered stdout - grgsm_scanner
# fully buffers stdout when piped, preventing real-time output
cmd = ['stdbuf', '-oL', 'grgsm_scanner']
# Add device argument (--args for RTL-SDR device selection) # Add device argument (--args for RTL-SDR device selection)
cmd.extend(['--args', f'rtl={device_index}']) cmd.extend(['--args', f'rtl={device_index}'])
@@ -1276,7 +1278,7 @@ def scanner_thread(cmd, device_index):
# Process output with timeout # Process output with timeout
scan_start = time.time() scan_start = time.time()
last_output = scan_start last_output = scan_start
scan_timeout = 120 # 2 minute maximum per scan scan_timeout = 300 # 5 minute maximum per scan (4 bands takes ~2-3 min)
while app_module.gsm_spy_scanner_running: while app_module.gsm_spy_scanner_running:
# Check if process died # Check if process died