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From: Dan Jacobson <jidanni@jidanni.org>
Newsgroups: gmane.emacs.bugs,gmane.comp.shells.bash.bugs,gmane.comp.gnu.core-utils.bugs
Subject: test -t FD vs. [FD]
Date: Thu, 19 Jun 2003 04:47:44 +0800
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[remove emacs group when following up]

>> Why does (shell-command "test -t&&tty") get so far to tell me 'not a
>> tty'!?

Paul> With a single argument, test only tells you whether that arguments is
Paul> empty.  You want "test -t 0" (or 1 or 2).

$ man test
       -t [FD]
              file descriptor FD (stdout by default) is opened on a terminal
I.e. argument optional

$ help test
        -t FD          True if FD is opened on a terminal.
Not so optional with bash then.

You guys should unify them.
>> Wait, (shell-command "/usr/bin/test -t&&tty") doesn't get that
>> far, good.

Paul> Looks like /usr/bin/test is buggy.