I am rewriting the split utility in perl, mostly just to do it (plagiarizing a version in awk in the gawk manual).It requires creating new files to write to every thousand lines (or so) of input.

I have read the relevant passages in perl cookbook and learning perl, but I am unsure how to deal with the anonymous fileglob produced from an indirect filehandle. How do I close the file?

The code is unfinished, but you can see where I am unsure at the end of it:

# split-unix.pl -- do split in perl
#
# usage:split [-num] file [outname]

my $outfile = "x";  #default
my $limit = 1000;
my $readfile;
my $s1= "a";

if (scalar(@ARGV) > 3){
  usage;
}
if($ARGV[0] =~/^[0-9]+/){
  $limit = -$ARGV[0];
  shift @ARGV;
}
$readfile = $ARGV[0];
shift @ARGV;
if (defined $ARGV[0]){
  $outfile = $ARG[0];
}
$outfile.=$s1;
  
open ($write, ">", $outfile) or die "$0: can't open $outfile $!";  
open ($fh, "<", $readfile) or die "$0: can't open $readfile $!";
while(<>){
  if ($. < $limit){ 
    print;
  }
  else{
    $outfile++;
    $write=""; # I think this answers my question
    open ($write, ">", $outfile) or die "$0: can't open $outfile $!";
  }
}

[download]
cleaned up the syntax errors, but now problem is error:"can't open -100 No file or directory ..."

In reply to dynamic filenames, indirect filehandles by jjohhn

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