отслеживать системные вызовы и сигналы (trace system calls and signals)
Диагностика (Diagnostic)
When command exits, strace exits with the same exit status. If
command is terminated by a signal, strace terminates itself with
the same signal, so that strace can be used as a wrapper process
transparent to the invoking parent process. Note that parent-
child relationship (signal stop notifications, getppid(2) value,
etc) between traced process and its parent are not preserved
unless -D is used.
When using -p without a command, the exit status of strace is
zero unless no processes has been attached or there was an
unexpected error in doing the tracing.
