Hi, just looked into this, apparently the calls originate in the ExecFork function in apt-pkg/contrib/fileutl.cc, lines 760-792 (as of commit 15901516).
Michael Vogt seems to have increased the number of file descriptors that are closed from 40 to sysconf(_SC_OPEN_MAX) in Git commit 61f954bf. (While the 65535 calls to getrlimit have been reduced to 1 in the latest Git version, the fcntl problem remains.) The code fragment in question seems to have been introduced in the early days of apt (April 1999) by Jason Gunthorpe: commit 54676e1a82f400e37879bc931b6db0c13b8ebb3f Author: Arch Librarian <[email protected]> Date: Mon Sep 20 16:53:38 2004 +0000 Working apt-get source build stuff Author: jgg Date: 1999-04-20 05:02:09 GMT Working apt-get source build stuff // Close all of our FDs - just in case for (int K = 3; K != 40; K++) fcntl(K,F_SETFD,FD_CLOEXEC); I am not familiar enough with the apt codebase to understand the need to close all file descriptors. Would it be ok to only close the fds listed in /proc/self/fd/ as suggested by Julian Andres Klode? Best, Sebastian -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
