Steven Chamberlain wrote: > That is what led me to assume that O_CLOEXEC might be defined as zero > when our kfreebsd-images are built (and hence FD_CLOEXEC set by > default). But I can't easily check this until I get a new kfreebsd-* > build environment set up. Debian's kfreebsd packages do not have any patches that intend to change the meaning or value of O_CLOEXEC (nor any that mention it in their description or patch text).