<p>man page says:<br>
"It intercepts and records the system calls which are called by a process and the signals which are received by a process". But when app uses signalfd( ) to get signal delivery via file descriptor,<br>
the when you run strace -p on the app process, you will not see a signal being received. You will instead see that app wakes from epoll_wait() and performs a read() on the file descriptor.<br>
This info is missing in man page.</p>

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