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12.13.2005 at 10:50AM PST, ID: 21663275
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Dynamic Windows batch file creation with text file parsing

Tags: file, batch, windows, parsing, text
I am an experienced database programmer, but am not over the learning curve with Perl.  Barely started would be very accurate.  I am writing some automated scripts to extract some Windows service names from a text file.

The starting text file, (FileA.txt), looks like:

[3][342]SERVICE_NAME: OracleOraDb10g_home1TNSListener
[5][352]SERVICE_NAME: OracleServiceCRIDORCL

I want to create a text file, (FileB.txt), that looks like:

sc stop OracleServiceCRIDORCL
sc stop OracleOraDb10g_home1TNSListener

I'm sure I will have to use a combination of readline, index, and substr.

I'm not sure of how to read FileA.txt parse each line and write out to FileB.txt.

I need to complete this pretty quickly, so any help is appreciated.

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Question Stats
Zone: Programming
Question Asked By: lookingforjava
Solution Provided By: geotiger
Participating Experts: 2
Solution Grade: B
Views: 34
Translate:
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12.13.2005 at 10:59AM PST, ID: 15476314

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12.13.2005 at 11:03AM PST, ID: 15476348

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12.13.2005 at 11:03AM PST, ID: 15476349

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12.13.2005 at 11:09AM PST, ID: 15476407

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12.13.2005 at 11:15AM PST, ID: 15476454

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12.13.2005 at 11:19AM PST, ID: 15476477

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12.13.2005 at 10:59AM PST, ID: 15476314

Rank: Master


my $fa = 'FileA.txt';
my $fb = 'FileB.txt';

open FA, "<$fa" or die "could not read file - $fa: $!\n";
my @a;
while (<FA>) {
    next unless $_ =~ /\S/;
    my ($sn) = ($_ =~ /:\s*(.+)/);
   push @a ,$sn;
}
close FA;

open FB, ">$fb" or die "Could not write to file - $fb: $!\n";
foreach my $k (@a) {
    print FB "sc stop $k\n";
}
close FB;

Accepted Solution
 
12.13.2005 at 11:03AM PST, ID: 15476348

Rank: Master

If you want to open and write at the same time, then it is:


my $fa = 'FileA.txt';
my $fb = 'FileB.txt';

open FA, "<$fa" or die "could not read file - $fa: $!\n";
open FB, ">$fb" or die "Could not write to file - $fb: $!\n";
while (<FA>) {
    my ($sn) = ($_ =~ /:\s*(.+)\/);  # get service name
     print FB "sc stop $sn\n";
}
close FA;
close FB;
 
12.13.2005 at 11:03AM PST, ID: 15476349
I'll give it a try
 
12.13.2005 at 11:09AM PST, ID: 15476407

Rank: Wizard

You could reduce the while loop a little.

while(<FA>) {
   print FB "sc stop $1\n" if /SERVICE_NAME: (.+)/;
}
 
12.13.2005 at 11:15AM PST, ID: 15476454
Works great.  Of course I don't know what it means.  

Does the "<$fa" mean to open FileA.txt for read?

Does the ">$fb" mean to open FileB.txt for write?

I have no idea how you are pattern searching for the occurrence of colon.  Can you recommend a good website of file i/o and pattern searching with Perl?

Thanks
 
12.13.2005 at 11:19AM PST, ID: 15476477
I'll ask the website recommendation in another question.  Thanks

 
 
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