perl-Proc-Simple

Launch and Control Background Processes

The Proc::Simple package provides objects mimicing real-life processes from a user's point of view. A new process object is created by $myproc = Proc::Simple->new(); Either external programs or perl subroutines can be launched and controlled as processes in the background. A 10-second sleep process, for example, can be launched as an external program as in $myproc->start("/bin/sleep 10"); # or $myproc->start("/bin/sleep", "10"); or as a perl subroutine, as in sub mysleep { sleep(shift); } # Define mysleep() $myproc->start(\&mysleep, 10); # Launch it. or even as $myproc->start(sub { sleep(10); }); The _start_ Method returns immediately after starting the specified process in background, i.e. there's no blocking. It returns _1_ if the process has been launched successfully and _0_ if not. The _poll_ method checks if the process is still running $running = $myproc->poll(); and returns _1_ if it is, _0_ if it's not. Finally, $myproc->kill(); terminates the process by sending it the SIGTERM signal. As an option, another signal can be specified. $myproc->kill("SIGUSR1"); sends the SIGUSR1 signal to the running process. _kill_ returns _1_ if it succeeds in sending the signal, _0_ if it doesn't. The methods are discussed in more detail in the next section. A destructor is provided so that a signal can be sent to the forked processes automatically should the process object be destroyed or if the process exits. By default this behaviour is turned off (see the kill_on_destroy and signal_on_destroy methods).

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