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[[!meta title="SA_SIGINFO, SA_SIGACTION"]]
[[!tag open_issue_glibc]]
IRC, #hurd, August / September 2010:
<giselher> Hy, I came across SA_SIGINFO in cherokee, I have the void sighandler(int num) prototype but how do I add the sa_handler field?
<pinotree> if SA_SIGACTION is not defined, then you use sa_handler instead of sa_sigaction, and not add SA_SIGINFO in the sa_flags
<giselher> SA_SIGINFO is not defined
<pinotree> s/SA_SIGACTION/SA_SIGINFO/ above, yes
<giselher> K
<giselher> I am not sure if I fully understand this, there is the line "act.sa_flags = SA_SIGINFO" and how do I have to change that >_>
<pinotree> can you paste the source in a pastebin?
<giselher> k
<giselher> http://archhurd.pastebin.com/N8BCnG6g at line 790
<pinotree> something along the lines of http://www.archhurd.pastebin.com/tdpcFD5G
<pinotree> note that in the handler the siginfo_t parameter is used, which cannot be done if SA_SIGINFO is not defined
<pinotree> (that code still won't compile, yet)
<giselher> btw: is there a reason why SA_SIGINFO is not implemented?
<giselher> the guildlines only say "It's not implemented"
<azeem> 09:43 < azeem> signal stuff is tricky :-/
<azeem> basically it was pending on a complete rewrite by Roland, which never occured
<youpi> I have an almost complete implementation, just not finished yet
<youpi> (only the siginfo part)
<azeem> nobody really groked that code for years until youpi showed up, but he added partial support AFAIK, not having much time on his hand
<azeem> ah, he's here
<azeem> :)
<giselher> oh, should I just wait ?
<youpi> no
<giselher> k
<youpi> there are OSes which don't have SA_SIGINFO
<youpi> just cope with them: use sa_handler instead of sa_sigaction, and don't set SA_SIGINFO
<youpi> (i.e. replace with 0 in your example)
<giselher> ok
<youpi> when SA_SIGINFO becomes available, it'll just be used
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