🚀 go-pugleaf

:: Gitte T gersen
:: Hi everybody,

"Hi Doctor Nick!"

(Sorry.  Simpsons flashback.  I'm better now.)

:: I you are going to do a
::          ps -ef | grep 'something'
:: and you don't wanna see  the   grep 'something',
:: but only the true result - what are you going to write
:: to left out the 'grep' line ??????

: Christian Tremblay <chris@terax.com>
: ps -ef | grep 'something' | grep -v grep

Or, since what you do is ensure the ps process doesn't include
the grep process in the ultimate output, ensure the grep isn't
running when the ps runs.  I have a pipe fitting for that,

          ps -ef | pseq | grep something

              (where "pseq" acts like (cat >tmp; cat tmp; rm tmp))

or (in this particular case) just delay the start of the grep a bit

         ps -ef | (sleep 5; grep something)

Just some alternatives.

Note, I made myself a pseq when I had a case where a writer blew up
ungracefully if ever a reader of its stdout didn't read all the way
to the end (that is, behaved ungracefully upon receipt of a SIGPIPE).
Thus, the pipe fitting to make an panic-prone writer cooperate
with a lazy reader; also useful in this case.

--
Wayne Throop   throopw@sheol.org   http://sheol.org/throopw