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Hi, I fell on this using openssh on cygwin. Though it may be a cygwin related issue, I think it's may be a bug on the main openssh tree. Thus my posting here. I'm CC'ing to the public list for information. The part of code I'm refering to is : /* XXX might close listen socket */ (void)dup2(fd, STDIN_FILENO); (void)dup2(fd, STDOUT_FILENO);

The first patch is a leftover from the switch to libxl__create_qemu_logfile, and while there it also handles possible errors when opening /dev/null. The second one is a fix for the issues present in do_daemonize. Thanks, Roger.