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142325a93c
The signal handler for SIGINT/TERM/QUIT and, importantly, SIGPIPE tries to write an informational message to stderr. When however stderr is redirected to a closed pipe, this will cause (another) SIGPIPE, and in turn the signal handler will get called again, and again and again. Since we intend to exit rtl_fm anyways, we can just ignore this signal.
rtl-sdr turns your Realtek RTL2832 based DVB dongle into a SDR receiver ====================================================================== For more information see: https://osmocom.org/projects/rtl-sdr/wiki