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if statement

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# 1  
Old 04-28-2010
if statement
i am trying to write a if and OR statement but its not working, can someone help me out
Code:
if `egrep -s "/usr2/local/ftpd" || tail -20 /usr2/logs/ftp.log | grep -c disconnecting = 0 
then
.
.

Last edited by vbe; 04-28-2010 at 02:02 PM.. Reason: code tags please
# 2  
Old 04-28-2010
I have no idea what this is supposed to be doing.

Code:
if `egrep -s "/usr2/local/ftpd"

Why are you putting a command that prints no output into backticks? And do you really want it to be reading from stdin?

Code:
|| tail -20 /usr2/logs/ftp.log | grep -c disconnecting = 0

So you want to check if the stream output of a command that's only going to ever print 'disconnecting' if anything at all, is zero? You also forgot the second backtick.

Could you explain exactly what you're trying to do here? I think your syntax is a bit messed up.
# 3  
Old 04-28-2010
this is how it was working before

Code:
if `egrep -s "/usr2/bin/ftpd" /var/tmp/check.tmp` 
then
        echo "   FTPD is Running..."

now i want to add a OR statement with it

Code:
tail -20 /usr2/logs/ftp.log | grep -c disconnecting = 0

so

Code:
if `egrep -s "/usr2/bin/ftpd" /var/tmp/check.tmp` OR  tail -20 /usr2/logs/ftp.log | grep -c disconnecting = 0
then
        echo "   FTPD is Running...
else
       echo " FTPD is not Running.

Last edited by Scott; 04-28-2010 at 02:44 PM.. Reason: Code tags, please...
# 4  
Old 04-28-2010
Quote:
Originally Posted by shehzad_m
this is how it was working before

if `egrep -s "/usr2/bin/ftpd" /var/tmp/check.tmp`
then
echo " FTPD is Running..."
That's a useless use of backticks, though a pretty unique variation on it -- I've never seen it used to suppress output before. Should be
Code:
if egrep -q -s "/usr2/bin/ftpd" /var/tmp/check.tmp
then
...

Quote:
now i want to add a OR statement with it

tail -20 /usr2/logs/ftp.log | grep -c disconnecting = 0
Right now you're telling it to check if the word 'disconnecting' exists in the files = and 0. Comparisons between strings have to happen between [ ].

Code:
if egrep -q -s "/usr2/bin/ftpd" /var/tmp/check.tmp ||
        [ $(tail -20 /usr2/logs/ftp.log | grep -c disconnecting) = 0 ]
then
...
fi

Last edited by Corona688; 04-28-2010 at 02:33 PM.. Reason: fix typo
# 5  
Old 04-28-2010
Code:
egrep -s "/usr2/bin/ftpd" /var/tmp/check.tmp
if [ $? eq "0" ]; then
 echo " FTPD is Running..."
else
 count=`tail -20 /usr2/logs/ftp.log | grep -c disconnecting`
 if [ $count = "0" ]; then
  echo " FTPD is Running..."
 fi
 else
  echo " FTPD is not Running.." 
fi

# 6  
Old 04-28-2010
Quote:
Originally Posted by Corona688
That's a useless use of backticks, though a pretty unique variation on it -- I've never seen it used to suppress output before. Should be
Code:
if egrep -q -s "/usr2/bin/ftpd" /var/tmp/check.tmp
then
...

Right now you're telling it to check if the word 'disconnecting' exists in the files = and 0. Comparisons between strings have to happen between [ ].

Code:
if egrep -q -s "/usr2/bin/ftpd" /var/tmp/check.tmp ||
        [ $(tail -20 /usr2/logs/ftp.log | grep -q disconnecting) = 0 ]
then
...
fi

i want to check for the output of grep -c

so when i run

Code:
tail -20 /usr2/logs/ftp.log | grep -c disconnecting

it gives me a count in the output, so if the count is equal to 0 then i want to echo ftp is running.
Last edited by Scott; 04-28-2010 at 02:45 PM.. Reason: Code tags, PLEASE!
# 7  
Old 04-29-2010
That's what my code does, then.
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