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siginfo(5)on System V related Unix flavours to find the sender of a signal
Originally I needed it on Solaris,
Sample output on SunOS 5.5 and AIX 4.3.2
These versions do have at least on flaw, they use libc functions in the handler. As the program is catching all signals anyway, this worked for all my needs that time.
fork() to such a program, pay attention about signals
from or due to the child, as well as other possibly frequently occuring
signals to the parent: beware of a forkbomb. F.i. I got SIGWAITING on
SunOS 5.5, although I was not even using threads...
And yes, I found the buggy causer in my case eventually: a nightly running
rsync(1) with euid 0, running amok and signalling everything