-0 only says how to read. You also need to tell perl to read the file :-). Like this: perl -0777 -ne 'print' foo.out. (The "n" option tells perl to read.)

Best, beth

There's no reason to use -0777 in that example.

perl -0777 -ne'print' in.txt
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and

perl -ne'print' in.txt
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produce the same output. The difference is the former only loops once since it loaded the entire file into memory at once. The latter reads and prints a line at a time.

You can see the difference in the following:

perl -0777 -nle'print "[[[$_]]]"' in.txt
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and

perl -nle'print "[[[$_]]]"' in.txt
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Thank you so much for your reply.

$ perl -MO=Deparse,-p  -0777 -e 'print'
BEGIN { $/ = undef; $\ = undef; }
'???';
-e syntax OK

$ perl -MO=Deparse,-p  -0777 -pe 'print'
BEGIN { $/ = undef; $\ = undef; }
LINE: while (defined(($_ = <ARGV>))) {
    '???';
}
continue {
    print($_);
}
-e syntax OK

$ perl -MO=Deparse,-p  -0777 -ne 'print'
BEGIN { $/ = undef; $\ = undef; }
LINE: while (defined(($_ = <ARGV>))) {
    '???';
}
-e syntax OK
[download]

You goofed your quotes on windows :)

$  perl -MO=Deparse,-p  -0777 -e print
BEGIN { $/ = undef; $\ = undef; }
print($_);
-e syntax OK

$  perl -MO=Deparse,-p  -0777 -pe print
BEGIN { $/ = undef; $\ = undef; }
LINE: while (defined(($_ = <ARGV>))) {
    print($_);
}
continue {
    (print($_) or die("-p destination: $!\n"));
}
-e syntax OK

$  perl -MO=Deparse,-p  -0777 -ne print
BEGIN { $/ = undef; $\ = undef; }
LINE: while (defined(($_ = <ARGV>))) {
    print($_);
}
-e syntax OK
[download]