80 lines
1.4 KiB
Perl
80 lines
1.4 KiB
Perl
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#!/usr/local/bin/perl
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use strict;
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use Fcntl;
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# copy-if-different.pl
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# Copy to the destination if the source is not the same as it.
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my @filelist;
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foreach my $arg (@ARGV) {
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$arg =~ s|\\|/|g; # compensate for bug/feature in cygwin glob...
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$arg = qq("$arg") if ($arg =~ /\s/); # compensate for bug in 5.10...
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foreach (glob $arg)
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{
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push @filelist, $_;
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}
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}
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my $fnum = @filelist;
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if ($fnum <= 1)
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{
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die "Need at least two filenames";
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}
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my $dest = pop @filelist;
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if ($fnum > 2 && ! -d $dest)
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{
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die "Destination must be a directory";
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}
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foreach (@filelist)
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{
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my $dfile;
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if (-d $dest)
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{
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$dfile = $_;
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$dfile =~ s|^.*[/\\]([^/\\]*)$|$1|;
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$dfile = "$dest/$dfile";
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}
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else
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{
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$dfile = $dest;
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}
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my $buf;
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if (-f $dfile)
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{
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sysopen(IN, $_, O_RDONLY|O_BINARY) || die "Can't Open $_";
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sysopen(OUT, $dfile, O_RDONLY|O_BINARY)
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|| die "Can't Open $dfile";
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while (sysread IN, $buf, 10240)
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{
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my $b2;
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goto copy if !sysread(OUT, $b2, 10240) || $buf ne $b2;
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}
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goto copy if sysread(OUT, $buf, 1);
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close(IN);
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close(OUT);
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print "NOT copying: $_ to $dfile\n";
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next;
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}
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copy:
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sysopen(IN, $_, O_RDONLY|O_BINARY) || die "Can't Open $_";
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sysopen(OUT, $dfile, O_WRONLY|O_CREAT|O_TRUNC|O_BINARY)
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|| die "Can't Open $dfile";
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while (sysread IN, $buf, 10240)
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{
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syswrite(OUT, $buf, length($buf));
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}
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close(IN);
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close(OUT);
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print "Copying: $_ to $dfile\n";
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}
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