[How To?] Run shell script and get output into another shell.
Hi guys,
I have a simple question, I want to store the output of the following command:
Quote:
sudo iotop -t 0 -C 3 | grep "load: "
As you can see it is running all the time, and we get a new line every 3sec.
I just want to store these new lines into a single variable, so I can use it into a script.
To clear the screen, and do not print lines after the others when iotop is running just delete "- C".
I DO NOT WANT TO STORE THE OUTPUT ON THE DRIVE!!! I DO NOT WANT TO KILL IOTOP, IT MUST BE RUNNING ALL THE TIME IN BACKGROUND!!!
The idea is to do not write on the drive! Just store the output into a single variable called $Activity.
For example:
Code:
Activity=$(sudo iotop -t 0 3 | grep "load: ") &
While $Activity... do blahblah... done
But the fact is that nothing can be stored into Activity
So I have tried to know if something can be done to read the last output of a specified PID. But I need help on that point too :-/ I don't know how to do it.
Please help...
---------- Post updated at 09:57 AM ---------- Previous update was at 02:02 AM ----------
Ok, here is my code:
Code:
sudo iotop -t 0 -C 3 | grep "load: " | script.sh
script.sh:
Code:
#!/bin/sh
while read data
do
echo "[$(date +"%D %T")] $data" >> log_activity.txt
done
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Discussion started by: hoyanet
1 Replies
LEARN ABOUT XFREE86
zgrep
ZGREP(1) General Commands Manual ZGREP(1)NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)ZGREP(1)
07-16-2009
