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02.23.2008 at 11:17PM PST, ID: 23188132
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Script in bash to find string and replace numbers

Tags: Apple, Mac OSX 10.4, bash script, safari
I am looking for some help in writing a script in bash to run on the Mac OSX/Unix.

I have a file that I want to search and find a key word in the sentence, example
"#define VERSION"
once I find this line I want to replace the numbers that are in the line with the numbers typed in by the user.

As follows:

line in file is:

#define VERSION   "1.2.3.4"

user types in ./script <some arg> 0.9.8.7

line in file is changed to #define VERSION "0.9.8.7"

You can not look for the 1.2.3.4 because it can be any number at run time. I was thinking of something that might use sed with the option for the sequence as [0-9].[0-9].[0-9].[0-9] where the number in quotes can be any numbers at any given time.

Also the script has to search for the numbers and quote and only replace the numbers not replace the whole line because again the line could have different spaces/tabs and etc. that I do not want to format.

In short the script replaces the numbers only leaving the rest of line in tack and as is.

Thanks
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Question Stats
Zone: Programming
Question Asked By: atomicgs12
Solution Provided By: Tintin
Participating Experts: 3
Solution Grade: B
Views: 69
Translate:
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02.23.2008 at 11:44PM PST, ID: 20969129

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02.23.2008 at 11:53PM PST, ID: 20969157

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02.23.2008 at 11:59PM PST, ID: 20969164

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02.24.2008 at 12:58AM PST, ID: 20969257

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03.04.2008 at 11:38AM PST, ID: 21044281

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03.04.2008 at 12:58PM PST, ID: 21045051

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03.04.2008 at 01:20PM PST, ID: 21045233

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03.04.2008 at 02:04PM PST, ID: 21045605

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03.05.2008 at 03:11AM PST, ID: 21049264

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02.23.2008 at 11:44PM PST, ID: 20969129
number="0.9.8.7"
sed -i "s/\(#define VERSION.*\"\)\0-9]\.[0-9]\.[0-9]\.[0-9]/\1V$number\"/"file
Accepted Solution
 
02.23.2008 at 11:53PM PST, ID: 20969157
if the number to change is always at the end, here's a simpler version. substitute "1.2.3" for $1 if needed
1:
# awk -v num="1.2.3" '/#define/{$NF=num;print;next}1' file
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02.23.2008 at 11:59PM PST, ID: 20969164
In bash
1:
2:
3:
4:
5:
6:
7:
while read -r a b c
do
  case $a in
   \#define ) echo "$a $b $1";;
    * ) echo "$a $b $c" ;;
  esac
done < file
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02.24.2008 at 12:58AM PST, ID: 20969257
sed -i  "s/\(#define VERSION.*\"\)[0-9]\.[0-9]\.[0-9]\.[0-9]/\1$number/" file
Assisted Solution
 
03.04.2008 at 11:38AM PST, ID: 21044281
Sorry for the slow follow up but I was out of town on anothe assignment.
Any way, TinTin and Ozo - when I run your script line I am getting " and error from 'bash -x " that says:
"sed: -i may not be used with stdin" do you have any suggestions:

ghostdog74: is there suppose to be the # symbol infront of the awk, if so it will not run in bash. If I take the # out I get the error: "awk: syntax error at source line 1 context is >>>> <<<< awk: bailing out at source line 1

In your second example could you define some of your variables more? what is a, b c? What is $1 I don't see where the string I am looking for "#define VERSION   "1.2.3.4" goes?

Thanks all for your help
 
03.04.2008 at 12:58PM PST, ID: 21045051
If you got the error:

"sed: -i may not be used with stdin"

it means that you are not using it in the same way as I posted.  You would get that error if you did something like:

cat file | sed -i .....
 
03.04.2008 at 01:20PM PST, ID: 21045233
TinTin-
No I am using exactly as you typed it, cut and paste. The only difference is that there needs to be a space between " and 'file' at the end of your sed line.
 
03.04.2008 at 02:04PM PST, ID: 21045605
Update:
I used TinTin solution and could get it to work on standard print out but not to rewrite the file by taking the -i out. With the -i in i got past the "sed: -i may not be used with stdin" by fixing some of the line, putting in the '[' at the first pair of 0-9, putting a space between /" and 'file' at the end of the script line and removing the 'V' before $number. Now when I run the script I am getting an "invalid command code M". For 'file' I have VERSIONFILE=/MyTestDir/Build/version.h where I put in $VERSIONFILE in place of 'file'. I am assuming it does not like the forward slashes or something. Any suggestions?
 
03.05.2008 at 03:11AM PST, ID: 21049264
no, "#' is not supposed to be infront of the awk command. try this
1:
awk -v num="1.2.3" '/\#define/{$NF=num;print;next}1' file
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