This article was posted to the Usenet group alt.hackers in
1995; any technical information is probably outdated.
Child
Boolean Grep?
Article: 7773 of alt.hackers From: chrisbib@umd.umich.edu (Christopher Bibbs) Newsgroups: alt.hackers Subject: Boolean Grep? Date: 7 May 1995 12:05:48 -0400 Organization: Univerisity of Michigan - Dearborn Lines: 31 Approved: No-never! Message-ID: 3oir4s$52s@task.umd.umich.edu NNTP-Posting-Host: task.umd.umich.edu X-Newsreader: NN version 6.5.0 #3 (NOV) Status: RO
Ok, I've been working on this for awhile and no one seems to be able to figure it out so I'll put it out here. I'm trying to get grep or a grep like function to return a true-false to be used in a script. Before you say use perl I should say that the point of this is expressly NOT to use perl. Basically, I'm grepping some inputs and if true the script responds with (you guessed it) True. We don't want to see the line(s) that triggered the true or the file name(s) just the line true. If anyone has a clue, I'd love to hear it. ObHack: Hmmm... ok, this is pretty lame, but will have to do. Since I work in a lab that is 90% PC's and 10% Mac-refugee-camp I take a lot of crap from the other conselor's. (I'm the sole Mac user amongst them) Well over the last term the almight PC's have been infected with more viruses than a cheap hooker and the Mac's have been clean as a whistle. What a shock. So at term's end we were flooded with users saying things like, "What do you mean its gone?" and "But I only use it in this lab.". Generally we just say, "Should have made a backup." and send them back looking like little kids after watching Bambi get shot. However, one of our last such users was a prof... a CIS prof. The desire to fix his disk was unreal! After watching everyone else work on it for 45 minutes I took the disk, slipped it in the Mac, copied the files, reformatted the disk, copied the files back, and gave the disk to the prof. The looks they gave me. I didn't tell them that you could do the same thing on the UNIX boxes. Moral of the story: Always have at least two OS's running that can read (if not use) each others files/disks. Proves to be an invaluable tool for removing viruses. -- Christopher Bibbs | The coroner declared Mr. Stanwyck chrisbib@umich.edu | dead... or extremely sleepy. http://www.umd.umich.edu/~chrisbib | -Fletch
Child