Michael Paquier f2c52eeba9 pg_waldump: Emit stats summary when interrupted by SIGINT ... Previously, pg_waldump would not display its statistics summary if it got interrupted by SIGINT (or say a simple Ctrl+C). It gains with this commit a signal handler for SIGINT, trapping the signal to exit at the earliest convenience to allow a display of the stats summary before exiting. This makes the reports more interactive, similarly to strace -c. This new behavior makes the combination of the options --stats and --follow much more useful, so as the user will get a report for any invocation of pg_waldump in such a case. Information about the LSN range of the stats computed is added as a header to the report displayed. This implementation comes from a suggestion by Álvaro Herrera and myself, following a complaint by the author of this patch about --stats and --follow not being useful together originally. As documented, this is not supported on Windows, though its support would be possible by catching the terminal events associated to Ctrl+C, for example (this may require a more centralized implementation, as other tools could benefit from a common API). Author: Bharath Rupireddy Discussion: https://postgr.es/m/CALj2ACUUx3PcK2z9h0_m7vehreZAUbcmOky9WSEpe8TofhV=PQ@mail.gmail.com		2021-12-02 13:52:16 +09:00
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src	pg_waldump: Emit stats summary when interrupted by SIGINT	2021-12-02 13:52:16 +09:00
KNOWN_BUGS
Makefile
MISSING_FEATURES
TODO