Killing ruby program from C

ruby-talk
1

Hi,

I need to start some Ruby programs from a C program. The C program
needs to be able to terminate the Ruby programs when it either exits
or some condition is met.

I tried:

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>

int main()
{
  system("ruby test.rb");

  sleep(5);
  if (killpg(0, SIGKILL) == -1)
    perror("killpg");
  printf("main program ending\n");
  return 0;
}

Which seems to work fine on a non-ruby program (i.e. another C
program). But the Ruby program (a simple while-true loop that prints
stuff) doesn't exit when the C program does killpg.

Thoughts?

2

Fixed. If I fork, and then launch the ruby program via system() in
the child process, the killpg kills the ruby program.

···

On 6/1/05, Joe Van Dyk <joevandyk@gmail.com> wrote:

Hi,

I need to start some Ruby programs from a C program. The C program
needs to be able to terminate the Ruby programs when it either exits
or some condition is met.

I tried:

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>

int main()
{
  system("ruby test.rb");

  sleep(5);
  if (killpg(0, SIGKILL) == -1)
    perror("killpg");
  printf("main program ending\n");
  return 0;
}

Which seems to work fine on a non-ruby program (i.e. another C
program). But the Ruby program (a simple while-true loop that prints
stuff) doesn't exit when the C program does killpg.

Thoughts?

3

Hi,

At Thu, 2 Jun 2005 02:30:37 +0900,
Joe Van Dyk wrote in [ruby-talk:144243]:

Fixed. If I fork, and then launch the ruby program via system() in
the child process, the killpg kills the ruby program.

SIGKILL lets ruby skip even finalizations and END blocks. If
SIGTERM is ignored, try SIGSTOP, SIGTERM and SIGCONT.

···

--
Nobu Nakada