I have a huge text file that look like this: 2013/255-12:23:34 - Some event happ

Question

                    I have a huge text file that look like this:
                    
                    2013/255-12:23:34 - Some event happen
                    2013/255-12:23:34 - Some event happen
                    2013/255-12:23:34 - Some event happen
                    2013/255-12:23:34 - Some event happen                 

                    ***Connection Lost                 

                    2013/256-12:23:34 - Some event happen
                    2013/256-12:23:34 - Some event happen
                    2013/256-12:23:34 - Some event happen
                    2013/256-12:23:34 - Some event happen
                    2013/257-12:23:34 - Some event happen
                    2013/257-12:23:34 - Some event happen
                    
                    I would like to use perl to split this file into smaller files with the date as file name.
                    
                    So I would look like this when done:
                    
                    2013_255.txt will contain:
                    
                    2013/255-12:23:34 - Some event happen
                    2013/255-12:23:34 - Some event happen
                    2013/255-12:23:34 - Some event happen
                    2013/255-12:23:34 - Some event happen
                    ** Connection Lost
                    2013_256.txt will contain:
                    
                    2013/256-12:23:34 - Some event happen
                    2013/256-12:23:34 - Some event happen
                    2013/256-12:23:34 - Some event happen
                    
                    2013_257.txt will contain:
                    
                    2013/257-12:23:34 - Some event happen
                    2013/257-12:23:34 - Some event happen
                    
                    Thanks,                 

Explanation / Answer

#!/usr/bin/perl use File::Basename; $inputfile=@ARGV[0]; $nof=@ARGV[1]; # nof - no of files to split ($filename,$dir,$ext) = fileparse($inputfile,'..*'); $header=`cat $inputfile | head -1`; $NOLIF=`cat $inputfile | wc -l`; # NOLIF - no of lines in file $NOARIF=$NOLIF-1; # NOARIF - no of actual records in file $NORPF=$NOARIF/$not; # NORPF - no of records per file $NNORPF=`printf "%1.f " $NORPF`; # NNORPF - new no of records per file $count=0; $filenum=0; while () { if ( $count == 0 ) { $nfilename = $filename._.$filenum.$ext; open( FILE, ">> $nfilename" ); print( FILE "$header " ); print( FILE "$_" ); $count++; #} elsif ( $count == $NUM_LINES ) { } elsif ( $count == $NNORPF ) { close( FILE ); $count = 0; $file_num++; } else { # just write the line! print( FILE "$_" ); $count++; } }

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