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If condition shell script beginner

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# 1  
Old 04-05-2016
If condition shell script beginner
Hi all

I have the folloing process that needs checking often:
Code:
ps -ef | grep ih
 bscsrtx   206 15901  0 11:28:10 pts/6     0:00 fih -r4
 bscsrtx   218 15901  0 11:28:27 pts/6     0:01 aih
 bscsrtx 29763 15901  4 11:27:16 pts/6     0:59 rdh -prih
    root   429 27268  0 11:30:15 pts/td    0:00 grep ih
 bscsrtx   239 15901  3 11:28:41 pts/6     0:00 rih -t
 bscsrtx 29946 15901  0 11:28:04 pts/6     0:00 dih -r -s60
 bscsrtx 29770 15901  0 11:27:27 pts/6     0:20 rdh -rih
 bscsrtx   244 15901  2 11:28:47 pts/6     0:00 prih

so I wrote a little script, to check it, and at the moment my sendmailis not working, so please can you correct it if something is wrong:
Code:
#!/bin/sh

> /tmp/fr/maillist.txt
ps -ef | grep ih | grep -v ih > /tmp/fr/maillist.txt

if [ -s /tmp/fr/maillist.txt ] ; then
echo "Process is running"
else
cat /tmp/fr/maillist.txt | mailx -s "processos down" xxxi@yyy.co.zz
fi

---------- Post updated at 12:00 PM ---------- Previous update was at 11:39 AM ----------

I have made a mistake on ps command, so if I change the script like this:

Code:
#!/bin/sh

ps -ef | grep -v grep | grep ih > /dev/null

if [ $? -ne 0 ]; then
mailx -s "rating down" xxx@yyy.co.zz
fi

will it work?
# 2  
Old 04-05-2016
Using pgrep:-

Code:
if pgrep -fl ih > /dev/null
then
        :
else
        mailx -s "Rating down" user@domain.com
fi

# 3  
Old 04-05-2016
is there anything wrong with my code?
# 4  
Old 04-05-2016
Quote:
Originally Posted by fretagi
is there anything wrong with my code?
No, there is nothing wrong with your code.
This User Gave Thanks to Yoda For This Post:
fretagi
# 5  
Old 04-05-2016
You can cut a grep out of your pipeline by changing:
Code:
ps -ef | grep ih | grep -v ih > /tmp/fr/maillist.txt

to:
Code:
ps -ef | grep '[i]h' > /tmp/fr/maillist.txt

# 6  
Old 04-06-2016
Hi

If I use this version of the script:
Code:
#!/bin/sh

> /tmp/fr/maillist.txt
ps -ef | grep '[i]h' > /tmp/fr/maillist.txt
if [ -s /tmp/fr/maillist.txt ] ; then
echo "Process is running"
else
cat /tmp/fr/maillist.txt | mailx -s " rating down" xxx@yyy.co.zz
fi

the output is Process is running

But they are not because I kill them

If I use this second version:
Code:
#!/bin/sh

ps -ef | grep -v grep | grep ih > /dev/null

if [ $? -ne 1 ]; then
mailx -s "rating down" xxxx@yyyy.co.zz
fi

I got nothing:

#./ih1.sh



Please can you help me in what could be wrong
# 7  
Old 04-06-2016
Quote:
Originally Posted by fretagi
Hi

If I use this version of the script:
Code:
#!/bin/sh

> /tmp/fr/maillist.txt
ps -ef | grep '[i]h' > /tmp/fr/maillist.txt
if [ -s /tmp/fr/maillist.txt ] ; then
echo "Process is running"
else
cat /tmp/fr/maillist.txt | mailx -s " rating down" xxx@yyy.co.zz
fi

the output is Process is running

But they are not because I kill them

If I use this second version:
Code:
#!/bin/sh

ps -ef | grep -v grep | grep ih > /dev/null

if [ $? -ne 1 ]; then
mailx -s "rating down" xxxx@yyyy.co.zz
fi

I got nothing:

#./ih1.sh



Please can you help me in what could be wrong
I'm not at all sure that I understand what you're saying. Are you saying that you have a script named ./ih1.sh which you run to determine if anything is running containing the string ih after you have killed everything running that contains the string ih?

You do realize that while you're running a script named ih1 there is something running containing the string ih don't you?
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