Thanks for your answers. I donīt really think the $command's format is the key, but I will change it to see it goes better. Anyway, how can I check the return value of open an close in an easy way?, because I really think the problem is there, in fact I use the "truss" linux command and I got some Err#9 EBADF (/* Bad file descriptor */)

In reply to segmentation fault by lbarbago

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