обзор сигналов (overview of signals)
Примечание (Note)
For a discussion of async-signal-safe functions, see
signal-safety(7).
The /proc/[pid]/task/[tid]/status file contains various fields
that show the signals that a thread is blocking (SigBlk),
catching (SigCgt), or ignoring (SigIgn). (The set of signals
that are caught or ignored will be the same across all threads in
a process.) Other fields show the set of pending signals that
are directed to the thread (SigPnd) as well as the set of pending
signals that are directed to the process as a whole (ShdPnd).
The corresponding fields in /proc/[pid]/status show the
information for the main thread. See proc(5) for further
details.
