Causes of SIGPIPE under linux

writes a simple client and server test function. After calling accpet, server will write the listening socket, and a SIGPIPE will be generated on the server side.
excuse me, why is this?

Apr.07,2022

the connection is a sub-connection of accept, and the listening socket is not connected, so of course it will SIGPIPE

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b397ef-2b4ff.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b397ef-2b4ff.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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