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Old 07-05-2006, 10:19 AM   #1
alred
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how to change some text of a certain line of a text file with bash and *nix scripting


how to change some text of a certain line of a text file with bash and *nix scripting ??

i could have use pascal to do that but ...

how to do it with bash , awk , sed or whatever the *nix guys like to do ??

eg ::
theres a file with the content of ::
Code:
...
private final int invokeThreadK=3;
private final int invokeRunnableK=4;
private final int invokeK_MaxCount=5;
/////////////////////////////////////////////////////////////////////////////////////////////////////  
private final String thisAddr="192.168.1.15";
private boolean terminated = false;
final String bttext="mb01buttton"  ;
...
when i execute a script file something like "dobuild 192.168.1.1"

the above file will be updated to ::
Code:
...
private final int invokeThreadK=3;
private final int invokeRunnableK=4;
private final int invokeK_MaxCount=5;
/////////////////////////////////////////////////////////////////////////////////////////////////////  
private final String thisAddr="192.168.1.1";
private boolean terminated = false;
final String bttext="mb01buttton"  ;
...

//thanks in advance ...

.
 
Old 07-05-2006, 11:07 AM   #2
MensaWater
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Code:
sed s/192.168.1.15/192.168.1.1/ inputfile >outputfile
The above will find any occurrence of 192.168.1.15 in input file and replace it with 192.168.1.1 and write all lines into outputfile. You can then

Code:
mv inputfile inputfile.DATESTAMP 
mv outputfile inputfile
This will save a copy of your original inputfile before overwriting it with what you changed in the outputfile.
 
Old 07-05-2006, 11:34 AM   #3
alred
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let me catch some breath first ...

...

ok ...

great and fast , thanks ...

i believe your code works but what if i want to "search" for the occurance of private final String thisAddr= and change the remaining text until the end of line ...

probably i should give a "dobuild "192.168.1.1"" or something ??

what should i do ??

.
 
Old 07-05-2006, 12:08 PM   #4
Hobbletoe
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Try as your "dobuild" script ...
Code:
#!/bin/bash

TEMP=$(mktemp /tmp/tmpxxxx)
sed 's/\(private final String thisAddr=\)\(.\)*/\1'$1'/' file_name > $TEMP
mv $TEMP/file_name

exit
Substituting the name of your file instead of file_name, obviously.
 
Old 07-05-2006, 12:33 PM   #5
alred
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thank to both of you and the hints on doing things more carefully ... they work great ...


.

Last edited by alred; 07-05-2006 at 12:36 PM.
 
Old 07-09-2006, 01:38 PM   #6
eddiebaby1023
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Quote:
Originally Posted by Hobbletoe
Try as your "dobuild" script ...
Code:
sed 's/\(private final String thisAddr=\)\(.\)*/\1'$1'/'
Waste of typing saving the original IP address:
Code:
sed 's/\(private final String thisAddr=\).*/\1'$1'/'
 
Old 07-10-2006, 11:55 AM   #7
alred
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this one also works great ...

strange erhh ... ^_^


.
 
  


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