8 Apr
2022
8 Apr
'22
3:32 a.m.
Douglas McIlroy wrote in
<CAKH6PiXBEZPyjUk=DD8moA8ZnA2kpfk=Z7+6WwckSQb5HPUX3Q(a)mail.gmail.com>:
|How would you wish to interact with
| /bin/bash >file
While the POSIX standard defines an interactive shell as one with
STDIN and STDERR being a terminal, i think the NetBSD shell did
not until not too long (< half a decade?) ago, and the mailer you
were using for a long time does not to this day. (Unfortunately.)
APPLICATION USAGE
Standard input and standard error are the files that determine
whether a shell is interactive when -i is not specified. For
example:
sh > file
and:
sh 2> file
create interactive and non-interactive shells,
respectively. Although both accept terminal input, the results of
error conditions are different, as described in Section 2.8.1 (on
page 2363); in the second example a redirection error encountered
by a special built-in utility aborts the shell.
--steffen
|
|Der Kragenbaer, The moon bear,
|der holt sich munter he cheerfully and one by one
|einen nach dem anderen runter wa.ks himself off
|(By Robert Gernhardt)