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Xrootd does not use SIG 64 and SIG 63, it uses SIGRTMAX and SIGRTMAX - 1 :) On fedora 30 these are:``` root [2] SIGRTMIN -> (int) 34 root [3] SIGRTMAX ->(int) 64 root [4] SIGRTMAX - SIGRTMIN -> (int) 30 ``` so `SIGRTMAX - 1 = SIGRTMIN + 29`. How about a plugin using signals and not blocking the RT signals (or unblocking them through ignorance) so they get delivered there from XRootd AIO code, even though they should not? Although I must admit I can not imagine the mess when signals are used for internal communication by two different sub-systems in a single multi-threaded program :) -- You are receiving this because you commented. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1113#issuecomment-574859815 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1