|> I'm working on a patch to provide an expandable fd array and have run into an
|> odd problem, apparently in bash. For some reason the shell is using the
|> sys_dupfd2 call to move fd 3 to fd 255, so that it ends up with fds 0, 1, 2, and
|> 255. This of course forces my patch to expand the fd array even though only four
|> descriptors are in use.
|> Can anyone explain why this is being done?
Fd 255 is used internally as a connection to the tty, so that it doesn't
interfere with the use of exec to relocate fds. Bash also allocates high
fds when handling a process substitution `<(foo)', for the same reason.
-- Andreas Schwab "And now for something schwab@issan.informatik.uni-dortmund.de completely different" schwab@gnu.org- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu