Re: scripting doubts

[Arthur Meeks Meeks <arthur.meeks.luppu@xxxxxxxxx>]

2009/8/5 Cameron Simpson <cs@xxxxxxxxxx>

On 04Aug2009 20:04, Arthur Meeks Meeks <arthur.meeks.luppu@xxxxxxxxx> wrote:
| I'm doing an "egrep "REPLICATION CLIENT|ALL" | wc -l" after the mysql
| -pwhatever -e "show grants for...etc" all this is redirected to a file using
| normal ">".
| So:
| for i in `cat file` do mysql -p -e "show grants etc.." "egrep "REPLICATION
| CLIENT|ALL" | wc -l > /tmp/whatever basically.
|
| /tmp/whatever has the following "format":
| server1:0
| server2:1
| server3:0
| etc
|
| I use another "for" to read this file and decide whether the database has
| the right privileges, if it has REPLICATION CLIENT or ALL privileges, "wc
| -l" will return 1 or more than 1, if it doesn't have any of them it will be
| a 0.
|
| What's the problem? When I can't log into a mysql database (mostly cause it
| is down) I got a "0", what I want is to discard these machines, so they're
| not included in /tmp/whatever.
| I tried doing: grep -v "ERROR" and doing a 2> /dev/null after the mysql -p
| -e "show grants etc.." but it doesn't work.

You're probably not getting to pay attention to the mysql exit status.
Perhaps something line this:

 : ${TMPDIR:=/tmp}
 cmd=`basename "$0"`
 tmpbase=$TMPDIR/$cmd.$$
 trap 'rm -f "$tmpbase".*' 0 1 3 15    # tidy up

 grants=$tmpbase.grants.txt
 while read host
 do
   mysql -h "$host" -ublah -pfhfhfhfhf -e "show grants..." >"$grants" \
   || { echo "skipping $host, maybe down" >&2
        continue
      }
   egrep ......... <"$grants" | wc -l ...
 done < file-of-hosts

Cheers,

Hi Cameron,

First off, thanks a lot.
I've been trying to include those lines in my script without modifying it too much but it wasn't possible.
How would you include your piece of code to this script:

#!/bin/bash
PASS="fff"
LIST="/tmp/perms"

for i in `cat /opt/lists/*clusters`; do echo -n $i: && mysql -h$i -uroot -p$PASS -e"show grants for 'user'@'10.10.%.%';" | egrep "REPLICATION CLIENT|ALL" | wc -l ; done > $LIST

if [ -e $LIST ]
    then
        for i in `cat $LIST`
        do
            d="`echo $i | awk -F ":" '{ print $1 }'`"
            perms="`echo $i | awk -F ":" '{print $2 }'`"

        if [ $perms = 0 ]
        then

            echo "machine $d has not the correct perms please check them out with: show grants for user 'user'@'10.10.%.%'" | mail -s "Incorrect MySQL privileges in $d" user@xxxxxxxxxx
        fi
    done
fi
 

Thanks
A
-- 
fedora-list mailing list
fedora-list@xxxxxxxxxx
To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines