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Read file and change a 0 to a 1 in output


 
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Homework and Emergencies Emergency UNIX and Linux Support Read file and change a 0 to a 1 in output
# 8  
Old 10-01-2009
Quote:
I want it to write this info to the file, not to create a new one.
This doesn't happen. A new file is ALWAYS written and the old file replaced. This is simply the method used by operating systems for "text" files of any sort.

The second problem is that you want to check "if it doesn't exist" and then place it there. Well, you can't really do that in one pass. The best solution is to Put it there and remove any existing ones.

So:
Code:
awk '
   /<key>ExcludeSimpleHostnames</ { s=1; next; } 
   s && /<integer>[0-9]*</integer>/ { s=0; next;} 
   /<key>Proxies</ { p=1 } 
   p && /<\/array>/ {
                print; 
                print "<key>ExcludeSimpleHostnames</key>";
                print "<integer>1</integer>"; 
                p=0; next; } 
    { print; }'

If you want to use the integer value found in this proxy section, you're kind of screwed -- you have to either do backtracking or two passes or create a metastructure of all the data and write it out again to XML. That's because you want the ExcludeSimpleHostnames key to follow the array in the output, but the input, it might occur later.

Last edited by otheus; 10-01-2009 at 12:15 PM.. Reason: formatted code
# 9  
Old 10-29-2009
Code

Code:
sed '<integer>,</integer> {
s/0/1/g
}
' input_file



---------- Post updated at 08:18 AM ---------- Previous update was at 08:16 AM ----------

Quote:
Originally Posted by ahmad.diab
Code

Code:
sed '<integer>,</integer> {
s/0/1/g
}
' input_file

or more accurte:-

Code:
sed 'ExcludeSimpleHostnames,\/integer {
s/0/1/g
}
' input_file.txt


Last edited by ahmad.diab; 11-05-2009 at 01:01 PM..

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