Investigate issue #3302 driver behavior when upsd aborts#3368

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jimklimov wants to merge 10 commits intonetworkupstools:masterfrom

jimklimov:issue-3302-drvconn

Commits on Apr 13, 2026

drivers/upsdrvctl.c: refactor with forkexec_parent_analyze() and a re-check before retry - POSIX part [#3302]
jimklimov
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drivers/upsdrvctl.c: refactor with forkexec_parent_analyze() and a re-check before retry - also for WIN32 [#3302]
jimklimov
committed
drivers/dstate.c: err on the safe side and set conn=NULL after sock_disconnect() [#3368]
jimklimov
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drivers/dstate.c: sock_disconnect(): try to flush the buffer [#3368]
jimklimov
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drivers/dstate.c: sock_disconnect(): resync code with wincompat::pipe_disconnect() implementation [#3302]
jimklimov
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drivers/dstate.c: debug-log the progress around starting and maybe failing CreateNamedPipe() [#3302]
jimklimov
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drivers/dstate.c, NEWS.adoc: revise closing of connections and returning error codes; document the methods [#3302]
jimklimov
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server/upsd.{c,h}: introduce send_err_extra() [#3331]
jimklimov
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server/netssl.c: net_starttls(): send_err_extra(NUT_ERR_ACCESS_DENIED) for faults in NSS setup [#3379, #3331]
jimklimov
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server/upsd.c: sendback(): adjust debug traces for write() vs ssl_write() [#3379, #3331]
jimklimov
committed