Hi MadeinGermany
I cannot use single quotes as there are several SQLs using string literals with single quotes within the su -c block that can cause the shell to get confused.
For eg: select to_char(sysdate,'DD/MM/YYYY HH24:MI:SS') from dual;
Thank you for pointing out the missing escape character for the second $counter variable
ongoto's suggestion of escaping the backtick seems to fix this issue. The following script has worked.
I need to check if it works in my real life script. THANK YOU BOTH VERY MUCH.
Code:
# cat realLife.sh
sudo su - appuser -c "
export counter=1
while true
do
if grep -iq BASKETBALL /tmp/somestring.txt
then
echo This loop iterated \$counter times before exiting..
break
fi
sleep 5
counter=\`expr \$counter + 1\`
done
"
Another question, is it possible to, in a for-loop incrementing until it reaches a certain number, to have it loop again without incrementing? Just have it drop what it is doing when it reaches this command and start again at the same number it was at? I know I could make a while loop and just... (0 Replies)
Hi All,
I amlearning UNIX scripting. I have a small query. I would be thankful if any one helps me out.
I have a below piece of code which delets the files. If file dosent have the permissions to delete a particular file I have used 2>>operator to track the error code.
But my objective is... (1 Reply)
I wonder how to stop further loop iterations when conditions gets false e.g.
This file.txt contains the following structure :
1
2
3
4
5
6
7
8
9
10
How to stop iteration when if statement gets false ?
for n in `cat file.txt`
do
if (( n<=5 )) (1 Reply)
question :how can i iterate to next item in for loop with the loop
e.g
for i in `cat abc.txt`
do
echo $i // this will display first line
i=$i+1; // this doesnt work for me.
echo $i; //this will display secound line
done
question: is my approach to manipulate text good?
I have... (3 Replies)
I have written the following script to update some Debian boxes.
#!/bin/bash
mxg_hosts_file="/etc/mxg/ssh-hosts"
while read line ; do
mxg_host="$(echo ${line} | awk -F":" '{print $1}')"
mxg_port="$(echo ${line} | awk -F":" '{print $2}')"
echo "Connecting and Upgrading... (3 Replies)
for VGLIST in `lsvg -o`
do
CLOSED_OUT=`echo $VGLIST | lsvg -l $VGLIST | awk '{print $6 " " $7}' | grep closed`
if ]; then
echo "Filesystems $CLOSED_OUT in VG that are in Closed status"
else
echo "\n Some message"
fi
Above Code is working fine, but echo "Filesystems $CLOSED_OUT... (8 Replies)
I have a script with logic like:
my_function()
{
if
mkdir $1
mkdir mydir_${2}
else
do something else
fi
}
read in list of items
while read list
do
my_function $list `date`
done
so basically it will make a directory for every name in the list and create a directory with the... (6 Replies)
I am trying to check multiple server's "uptime" in a loop over "ssh".
When I execute multiple ssh commands with hard coded servernames script is executing fine.
But when I pass server names using while loop, script is exiting after checking first server's status, why?
# serverList... (8 Replies)
Hello,
I have been stuck on this for some time and invested many hours trying to find a solution. I am trying to either loop through two variables or or two arrays and not sure how to do it. I am limited to ksh only, and don't have the ability to do a foreach, or for i AND for j etc...I... (19 Replies)
Hello,
I've written a script to automate encoding of all the MP4 files in a directory (incl. subdirectories). But unfortunately it's running for the first MP4 file only.
My machine details:
root@Ubuntu16:~# uname -a
Linux Ubuntu16 4.10.0-28-generic #32~16.04.2-Ubuntu SMP Thu Jul 20 10:19:48... (2 Replies)
Discussion started by: prvnrk
2 Replies
LEARN ABOUT PHP
wincache_ucache_cas
WINCACHE_UCACHE_CAS(3) 1 WINCACHE_UCACHE_CAS(3)wincache_ucache_cas - Compares the variable with old value and assigns new value to itSYNOPSIS
bool wincache_ucache_cas (string $key, int $old_value, int $new_value)
DESCRIPTION
Compares the variable associated with the $key with $old_value and if it matches then assigns the $new_value to it.
PARAMETERS
o $key
- The $key that is used to store the variable in the cache. $key is case sensitive.
o $old_value
- Old value of the variable pointed by $key in the user cache. The value should be of type long, otherwise the function returns
FALSE.
o $new_value
- New value which will get assigned to variable pointer by $key if a match is found. The value should be of type long, otherwise
the function returns FALSE.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
Using wincache_ucache_cas(3)
<?php
wincache_ucache_set('counter', 2922);
var_dump(wincache_ucache_cas('counter', 2922, 1));
var_dump(wincache_ucache_get('counter'));
?>
The above example will output:
bool(true)
int(1)SEE ALSO wincache_ucache_inc(3), wincache_ucache_dec(3).
PHP Documentation Group WINCACHE_UCACHE_CAS(3)
01-06-2015
