problem with shell script

Samuel Martín Moro faust64 at gmail.com
Thu Jan 13 13:15:44 UTC 2011


??

as already answered:
ps ax | awk '/[/]slapd /{n++} END{print n}'
searching '[s]lapd' will avoid grep "auto-matching", but would still return
commands like "vim /etc/slapd.conf" or ./myscript-slapd
about pgrep, like the usual grep, it needs a better expression than the
process name, otherwise it would return the same results as a grep

however, a perfect match may be done looking for the exact path
('[/]usr/local/bin/slapd '), but would still fail when, for ex. running
`objdump /usr/local/bin/slapd -x'
 also, if you want to count the number of outputed lines, using [p]grep and
wc makes two processes, while awk can do it all alone.

awk ftw!


On Wed, Jan 12, 2011 at 3:17 PM, <four.harrisons at googlemail.com> wrote:

> Hello
>
> I'm in trouble with a simple shell script that give
> erroneous value when running ...
>
> If I run commands interactively everything runs well
>
>  > ps ax | grep slapd | grep -v grep | wc -l
>       1
>
> If I run in the following shell script :
>
> #!/bin/sh
> SD=0
> SD=`ps -ax | grep slapd | grep -v grep | wc -l`
> echo $SD
>
> the result is 3 !!!
>
>
> Any info welcome !
>
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-- 
Samuel Martín Moro
{EPITECH.} 2011
CamTrace S.A.S

"Nobody wants to say how this works.
 Maybe nobody knows ..."
                      Xorg.conf(5)


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