FAQ 9.22 How do I read mail?
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From: PerlFAQ Server on 31 May 2010 00:00 This is an excerpt from the latest version perlfaq9.pod, which comes with the standard Perl distribution. These postings aim to reduce the number of repeated questions as well as allow the community to review and update the answers. The latest version of the complete perlfaq is at http://faq.perl.org . -------------------------------------------------------------------- 9.22: How do I read mail? While you could use the "Mail::Folder" module from CPAN (part of the "MailFolder" package) or the "Mail::Internet" module from CPAN (part of the "MailTools" package), often a module is overkill. Here's a mail sorter. #!/usr/bin/perl my(@msgs, @sub); my $msgno = -1; $/ = ''; # paragraph reads while (<>) { if (/^From /m) { /^Subject:\s*(?:Re:\s*)*(.*)/mi; $sub[++$msgno] = lc($1) || ''; } $msgs[$msgno] .= $_; } for my $i (sort { $sub[$a] cmp $sub[$b] || $a <=> $b } (0 .. $#msgs)) { print $msgs[$i]; } Or more succinctly, #!/usr/bin/perl -n00 # bysub2 - awkish sort-by-subject BEGIN { $msgno = -1 } $sub[++$msgno] = (/^Subject:\s*(?:Re:\s*)*(.*)/mi)[0] if /^From/m; $msg[$msgno] .= $_; END { print @msg[ sort { $sub[$a] cmp $sub[$b] || $a <=> $b } (0 .. $#msg) ] } -------------------------------------------------------------------- The perlfaq-workers, a group of volunteers, maintain the perlfaq. They are not necessarily experts in every domain where Perl might show up, so please include as much information as possible and relevant in any corrections. The perlfaq-workers also don't have access to every operating system or platform, so please include relevant details for corrections to examples that do not work on particular platforms. Working code is greatly appreciated. If you'd like to help maintain the perlfaq, see the details in perlfaq.pod. |