Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

If you are really determined that you don't want to un-set your CHLD signal handler, you need to bear in mind two things:

i) your 'standard' handler is throwing away the child pid and return code values and
ii) system() is, in effect, shorthand for the traditional UNIX fork/exec/wait idiom.

You may, therefore, want to set the signal handler to do something useful like:
my %pid; $SIG{CHLD} = sub { while((my $kid = waitpid(-1,WNOHANG))>0 ) { warn "PID $kid returned $?"; } };

(this is based Lincoln Stein's 'Network Programming with Perl' p305).

and replace $res = system @args;
with exec @args;

Though, you will need to consider the usual caveats regarding signal handlers in perls prior to 5.8.0 ...

In reply to Re: No child processes by slife
in thread No child processes by Jonathan

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

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others taking refuge in the Monastery: (5)
As of 2021-10-20 14:50 GMT
Find Nodes?
    Voting Booth?
    My first memorable Perl project was:

    Results (81 votes). Check out past polls.