w/o pgrep/pkill

_p(){ ps ax |grep $1 |sed '/grep.'"$1"'/d' |while read a;do printf ${a%% *}' ';printf "${a#* }" >&2;printf '\n';done;}
proc lister usage: p proc killer usage: p patt [signal] uses only ps, grep, sed, printf and kill no need for pgrep/pkill (not part of early UNIX) _p(){ ps ax \ |grep $1 \ |sed ' /grep.'"$1"'/d' \ |while read a;do printf ${a%% *}' '; printf "${a#* }" >&2; printf '\n'; done; } p(){ case $# in 0) ps ax |grep .|less -iE; ;; 1) _p $1; ;; [23]) _p $1 2>/dev/null \ |sed '/'"$2"'/!d; s,.*,kill -'"${3-15}"' &,'|sh -v ;; esac; } alas, can't get this under 255 chars. flatcap?
Sample Output

				

0
By: argv
2012-04-01 19:46:19

What Others Think

Challenge accepted. After a bit of analysis (it wasn't a very good film I was watching), it occurs to me that you want three things: ps ps | grep ps | grep | kill I've tidied up the source and put it on pastebin: (it's pretty crap that a code site like this can't handle code properly) http://pastebin.com/p94bUi5P Line 3: The old "grep -v grep" The usual way around that is it use a regex. This will match name, but not grep. grep [n]ame To avoid messing around with strings, I opted for grep [^]]name Lines 4,5,6: Very interesting, but that's a lot of characters in printf! I thought about using sed to split up the ps output, then you don't need the while loop. Line 14: What's that grep for? The only thing it /could/ do is filter out blank lines. The ps output doesn't have any blanks, so I left out grep. Line 14: less -iE. If you like those options, then you're better off setting the environment variable LESS export LESS=-ie Line 14,15 and 17,18 and 20,21. You don't need a ; at the end of the case options if you've got a ;; (saves a few characters). Line 19: You accept 2 or 3 parameters, but it gets very confusing. Line 20: ${3-15} I think you actually meant ${3:-15} i.e. use parameter 3 if it exists, otherwise default to the number 15 (SIGTERM). Line 20: 2>/dev/null Because the _p() function isn't well thought out, this looks a bit ugly. Line 20: sed. This is very strange. You seem to be performing a search on the process ids. If you only use 2 parameters, this doesn't do what you expect and in order to use 3 parameters you *must* give a search string. I dropped this from my version -- sorry, you need to decide what you want. Finally, there's still whitespace that could be removed to save a few characters. Also, everything can be put on one line, even the functions: p() { }; q() { } Also if you were desperate, you could rename _p to q which would save 3 chars! My version works as yours does: p pattern [signal] It takes up 146 characters. _x(){ ps ax;};_y(){ _x|grep [^]]$1;};_z(){ _y $1|sed 's/ .*//';};p(){ case $# in 0)_x|less;;1)_y $1;;2)X=$(_z $1);[ -n "$X" ]&&kill -$2 $X;;esac;} I've put it on pastebin, in its expanded form. http://pastebin.com/62CTTSZ6
flatcap · 624 weeks and 1 day ago
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Perfecthomepugs · 72 weeks and 1 day ago
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pugpuppies95 · 34 weeks and 2 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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