Return to README CVS log

Up to [CSRG BSD Unix] / 43BSD / contrib / tac

Annotation of 43BSD/contrib/tac/README, revision 1.1

1.1     ! root        1: Title:         tac
        !             2: 
        !             3: Author:        Unknown off the net long ago, and
        !             4:                Jay Lepreau
        !             5:                Computer Science Dept.
        !             6:                Univ. of Utah
        !             7:                Salt Lake City, UT 84112
        !             8:                801-581-4285
        !             9:        
        !            10: Net:           [email protected], {ihnp4,decvax}!utah-cs!lepreau
        !            11:                Sometime [email protected]
        !            12: 
        !            13: tac ("cat" backwards) is a small program which prints file segments
        !            14: in reverse order; by default it reverses by lines (like tail -r).
        !            15: Besides being able to reverse a file by segments delimited by an
        !            16: arbitrary string, its wins are that it is very fast, handles any
        !            17: size segments and any size files.  These make it an excellent
        !            18: filter, e.g. "tac <logfile> | egrep foo".
        !            19: 
        !            20: tmail is a trivial shell script which uses tac to display one's
        !            21: mailbox, message by message, most recent first.
        !            22: 
        !            23: Potential improvements to tac which I would appreciate having fed back to me:
        !            24: --segment by arbitrary regular expressions, but only if it's done
        !            25:        w/o sacrificing the current speed for the default case.
        !            26: --fix up handling of multiple files.
        !            27: --nicely integrate with tail somehow.
        !            28: 
        !            29: 1/11/86

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.