Thank you for your response.
It could also be that you should not exit() within the signal handler, but instead should set a flag which causes the main loop of the child process to end as-soon as-possible.
When this is done, then, no matter what the process was doing at the unpredictable instant in which the termination-signal arrived, you know that it will end at a predictable point and in a predictable state
Yes, that's often good idea to just set flag in signal handler.

However, I was hoping that Perl is kinda high-level language, so there can be nothing unpredictible in termination in random point of program (with Safe-signals).

Another problem, that my child processes have several possible places where they can spend significant amount of time. Inserting check for flag in all of those places is inconvenient.

In reply to Re^4: Complex and reliable signal handling. by vsespb
in thread Complex and reliable signal handling. by vsespb

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.