On Fri, May 15, 2020 at 04:07:33PM +0000, Karstens, Nate wrote:

Matthew,

What alternative would you suggest?

quoted

From an earlier email:

quoted

...nothing else addresses the underlying issue: there is no way to
prevent a fork() from duplicating the resource. The close-on-exec
flag partially-addresses this by allowing the parent process to
mark a file descriptor as exclusive to itself, but there is still
a period of time the failure can occur because the auto-close only
occurs during the exec(). Perhaps this would not be an issue with
a different process/threading model, but that is another discussion
entirely.

Do you disagree there is an issue?

Yes.  system() is defined as being unsafe for a threaded application
to call.  I pointed this out in the last thread.