Description:
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Hello.

I'm trying to run a php script from xinetd (Fedora Linux). I need to close stdin, stdout & stderr since I want to close the socket established with the caller process (I have a long processing to do locally, I need to release a remote resource & closing the connection is the only way I can do it).

I've tried :

fclose(STDIN); fclose(STDOUT); fclose(STDERR);

It does not work, the socket is still up & running.

When I run strace(1), I see that I'm closing fds 4, 5 & 6 (fd 3 is the fd of the script being read) and not fd 0, 1 & 2.

It seems that CLI PHP calls dup(2) to get duplicates of fd 0, 1 & 2 and so these 3 fds are totally unreachable from the script itself.

I'm not used to php source code, but I think that the problem comes from getting constants STDIN, STDOUT & STDERR thru filter code generation used by "php://stdin" etc. and no provision is done for the first calls:
a dup(2) is automatically used.

So constants STDIN, STDOUT & STDERR are not pointing to the correct fd's, but dup's.