`upsd`: Revise chunked select from a swarm of client or driver connections#3367

Merged

jimklimov merged 10 commits intonetworkupstools:masterfrom

jimklimov:issue-3302

Mar 25, 2026

Commits on Mar 25, 2026

tests/NIT/nit.sh, NEWS.adoc: add optional DUMMY_UPS_SWARM_COUNT support to start hundreds of drivers to see what happens [#3302]
jimklimov
committed
drivers/upsdrvctl.c: more logging around forkexec() and sleeps/waits involved [#3302]
jimklimov
committed
tests/NIT/nit.sh: customize a short maxstartdelay=1 for upsdrvctl [#3302]
jimklimov
committed
server/upsd.c: fix looping over more than MAXSYSCONN FDs [#3302]
jimklimov
committed
tests/NIT/nit.sh: bump MAXCONN in upsd.conf with non-trivial DUMMY_UPS_SWARM_COUNT [#3302]
jimklimov
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tests/NIT/nit.sh: adjust testcase expectations to possibility of DUMMY_UPS_SWARM_COUNT>0 [#3302]
jimklimov
committed
common/common.c: vupslog(): Ensure line buffering for sane logs on Windows console
jimklimov
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tests/NIT/nit.sh, NEWS.adoc: introduce `UPSLOG_SWARM_COUNT` for clients [#3302]
jimklimov
committed
server/upsd.c: mainloop(): revise chunked select - first try with zero timeout (pick already waiting connections), only then try time-waited select [#3302]
jimklimov
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common/common.c: background(): when reporting "Startup successful", also report getmyprocbasename() [#1711]
jimklimov
committed