Path: utzoo!mnetor!uunet!husc6!bbn!mit-eddie!ll-xn!ames!ncar!boulder!sunybcs!bingvaxu!leah!itsgw!batcomputer!lrj
From: lrj@batcomputer.tn.cornell.edu (Lewis R. Jansen)
Newsgroups: comp.unix.wizards
Subject: Re: Kernel Hacks & Weird Filenames
Message-ID: <4577@batcomputer.tn.cornell.edu>
Date: 26 Apr 88 14:20:22 GMT
References: <13041@brl-adm.ARPA> <4895@chinet.UUCP> <11153@mimsy.UUCP> <4911@chinet.UUCP> <11204@mimsy.UUCP> <4965@chinet.UUCP>
Reply-To: lrj@tcgould.tn.cornell.edu (Lewis R. Jansen)
Organization: Lab of Atomic and Solid State Physics, Cornell University
Lines: 22

In article <4965@chinet.UUCP> les@chinet.UUCP (Leslie Mikesell) writes:
}In article <11204@mimsy.UUCP> chris@mimsy.UUCP (Chris Torek) writes:
}}}In article <11153@mimsy.UUCP> (Chris Torek) wrote:
}}}}First, `non-printable characters'.  Well, there are certainly numerous
}}
}}But it does not.  (`ls' prints `?' for control characters; `ls|cat -v'
}}expands them; other programs have other means of displaying them.)
}
}What? How can ls|cat -v display control characters if ls changes them?

	  The ls command checks to see if its output is going to
	a terminal or to some other place.  If it's writing to a
	terminal, ls changes the various unprintable characters
	to be ``?'', otherwise it leaves them alone.

	  This is on SunOS 3.4, and probably evolved from 4BSD.

-- 
				-- Lewis R. Jansen, LASSP Systems Grunt
					lrj@helios.tn.cornell.edu
					  ...!cornell!lassp!lrj
	    "You can't fight in here, this is the War Room!"