36 lines
643 B
Perl
36 lines
643 B
Perl
#!/usr/bin/perl
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# This is a script for removing trailing whitespace from lines in files that
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# are listed on the command line.
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# This subroutine does the work for one file.
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sub detrail {
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my($file) = $_[0];
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my($changed) = 0;
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open(IN, "$file") || die "Can't open $file for input";
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@lines = <IN>;
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close(IN);
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foreach (@lines)
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{
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if (/\s+\n$/)
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{
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s/\s+\n$/\n/;
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$changed = 1;
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}
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}
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if ($changed)
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{
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open(OUT, ">$file") || die "Can't open $file for output";
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print OUT @lines;
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close(OUT);
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}
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}
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# This is the main program
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$, = ""; # Output field separator
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for ($i = 0; $i < @ARGV; $i++) { &detrail($ARGV[$i]); }
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# End
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