Eric Blake wrote: > Takahashi Mamoru wrote: > > $ touch a; chmod 0444 a; ls -l a > > $ /bin/rm -v a 0<&- > > removed 'a' > > This is undefined behavior, per POSIX (starting ANY application with > stdin closed is undefined; in some cases, the OS may choose to start the > app with stdin pointing to /dev/null instead of being closed, but you > can't rely on that happening). But the answer is the same whether stdin > remains closed by the OS or whether it was opened to /dev/null - either > way, stdin is not interactive. > > > Is this a bug or a feature ? > > Feature, mandated by POSIX (arguably an odd requirement, but it matches > historical practice that people have come to rely on, so we can't change > it). Therefore, I'm closing this as not a bug, although you should feel > free to reply if you have further comments or questions.
It is a feature. If that were changed then many cron tasks would start emitting email. Arguably people should be putting 'rm -f' instead of simply 'rm' in cron scripts but often they don't. Bob
