| PerlFAQ Server 2005-07-29, 5:04 pm |
| This message is one of several periodic postings to comp.lang.perl.misc
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common questions. The core of this message represents an excerpt
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6.3: How can I pull out lines between two patterns that are themselves on different lines?
You can use Perl's somewhat exotic ".." operator (documented in perlop):
perl -ne 'print if /START/ .. /END/' file1 file2 ...
If you wanted text and not lines, you would use
perl -0777 -ne 'print "$1\n" while /START(.*?)END/gs' file1 file2 ...
But if you want nested occurrences of "START" through "END", you'll run
up against the problem described in the question in this section on
matching balanced text.
Here's another example of using "..":
while (<> ) {
$in_header = 1 .. /^$/;
$in_body = /^$/ .. eof();
# now choose between them
} continue {
reset if eof(); # fix $.
}
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