andy@coma.UUCP (Andreas Lampen) (05/09/90)
Please send me your most favourite (sophisticated, cryptic, funny) pipe !
I want to open the list with a quite common one:
soelim foo.ms | refer -sAD -l4,2 | pic | troff -Talw -ms | tps | lpr -Plw
and a cross machine pipe:
tar cf - | dd bs=20k | rsh coma "cd blubber; dd bs=20k | tar xf -"
We are currently working on a concept for an object oriented shell for
UNIX and (of course) ran into difficulties when trying to model the
pipe mechanism. We came up with a first idea but soon found an example
where this didn't work ... .
Now, this inquiry shall set up a list of pipes that helps us to validate
our ideas. Additionally, I think such a list will be quite interesting
for UNIX users. I will post a summary anyway.
Thanks in advance,
Andy
--
----
Andreas Lampen, Tech. Univ. Berlin
andy@coma.cs.tu-berlin.demerlyn@iwarp.intel.com (Randal Schwartz) (05/10/90)
In article <690@coma.UUCP>, andy@coma (Andreas Lampen) writes: | tar cf - | dd bs=20k | rsh coma "cd blubber; dd bs=20k | tar xf -" I would use: tar cf - . | dd obs=20k | rsh coma "cd blubber && tar xf -" The second dd contributes nothing. The "&&" prevents you from extracting a whole mess of stuff in the wrong directory should you "fat-finger" the target directory. (Leaving the '.' off the tar sends an empty archive... you gotta send at least *something*. :-) I also usually leave off the first dd, because tar writes its stuff 20*512 bytes at a time anyway. If I'm nosy, it comes out as: tar cf - . | rsh coma "cd blubber && tar xvf -" so I can get a progress report. Run it in a separate window (GNU Emacs or bitmap window, take yer pick). Just another tar baby, -- /=Randal L. Schwartz, Stonehenge Consulting Services (503)777-0095 ==========\ | on contract to Intel's iWarp project, Beaverton, Oregon, USA, Sol III | | merlyn@iwarp.intel.com ...!any-MX-mailer-like-uunet!iwarp.intel.com!merlyn | \=Cute Quote: "Welcome to Portland, Oregon, home of the California Raisins!"=/
bush@evax.arl.utexas.edu (Joe Bush) (05/26/90)
Here is one I concocted to search for key words in include
files:
echo -n "key=";set kw=`line`;find /usr/include/. /sys/. -name \*.h -print | xargs hgrep "$kw" {}
I keep a file of such one-liners like the one above (file of
one line pipe-programs is named $HOME/.syscom) and have the following
line in my .cshrc:
alias g 'set j=`cat ${home}/.syscom|wc -l`;source -h ${home}/.syscom; history | tail -"$j"'
Then when I enter "g" from the keyboard, my csh history
mechanism gets primed for easy execution. I find it quite handy...
- Joe
--
bush@evax.arl.utexas.edu Vax Systems Manager
(817) 273 - 3333 CSE Dept. UT-Arlington
Office Rm 221 EB2 403 South Cooper
P.O. Box 19015 Arlington, Texas 76019trt@rti.rti.org (Thomas Truscott) (05/30/90)
Here is a shell script that has a pipeline in it somewhere. Tom Truscott #! /bin/sh # you pick a word, e.g. "hangman". # if antihang guesses "a", the new pattern is ".a...a.". # if antihang then gueses "t", the new pattern is ".a...a." (no change). # antihang fails on words not in /usr/dict/words wordlist=/usr/dict/words myguess=e guesses= while [ "$myguess" ]; do guesses=$guesses$myguess echo -n "I guess $myguess, new pattern: " read pattern srchpat=`echo "$pattern" | sed "s/\./[^$guesses]/g"` myguess=`grep "^$srchpat$" $wordlist | \ sed -e "s/[$guesses]//g" -e 's/\(.\)\(.*\)\1/\1\2/g' -e 's/./&\\ /g' | \ sort | uniq -c | sort -nr | \ sed -n -e 's/^.*\([^ ]\)$/\1/p' | sed 1q` done
maart@cs.vu.nl (Maarten Litmaath) (05/30/90)
In article <3870@rtifs1.UUCP>, trt@rti.rti.org (Thomas Truscott) writes: )... ) myguess=`grep "^$srchpat$" $wordlist | \ ) sed -e "s/[$guesses]//g" -e 's/\(.\)\(.*\)\1/\1\2/g' [...] ^^^^^^^^^^^^^^^^^^^^^^^^ Why? Anyway, a nice script, Tom! What do you think of the following modified version? --------------------cut here-------------------- #!/bin/sh # you pick a word, e.g. "hangman". # if antihang guesses "a", the new pattern is ".a...a.". # if antihang then gueses "t", the new pattern is ".a...a." (no change). # antihang fails on words not in /usr/dict/words # Original: Tom Truscott # Modifications: Maarten Litmaath wordlist=/usr/dict/words myguess=e guesses= NL=' ' while : do guesses=$guesses$myguess echo -n "I guess $myguess, new pattern: " read pattern case $pattern in *.*) srchpat=`echo "$pattern" | sed "s/\./[^$guesses]/g"` myguess=` sed -e "/^$srchpat$/!d" -e "s/[$guesses]//g" \ -e 's/./&\\'"$NL/g" -e 's/.$//' $wordlist | sort | uniq -c | sort -nr | sed -e 's/.*\(.\)$/\1/' -e q ` ;; *) break esac done -- "COBOL is the revenge of some witch burned |Maarten Litmaath @ VU Amsterdam: in Salem, [...]" (Bill Davidsen) |maart@cs.vu.nl, uunet!cs.vu.nl!maart