procmail, attachment, filename

qrange · 03-26-2018, 02:02 AM

greets,

I'd like to sort mail with procmail based on attachment filename (can be utf8).
what would be simplest way of doing it?

thanks.

frankbell · 03-26-2018, 08:53 PM

It's been a while since I used procmail, but I don't think that's an option. I just tried this

Code:

man procmail | grep attach

and it returned nothing.

This looks like it might be the best reference you can find other than the man page: https://www.howtoforge.com/procmail_tips_recipes

qrange · 03-27-2018, 02:09 AM

thanks frankbell.
is there any other command that could extract attachment filename?

I use 'formail' command to sort based on some header fields in procmail:

Code:

:0 h
SUBJECT=| formail -cXSubject

:0 h
RECEIVED=| formail -cXReceived

...

* RECEIVED ?? .*(gmail.com).*

edit:
I've tried this:

Code:

ripmime -v -i message.txt

but can't make it save files to /dev/null and keep just the 'verbosity'

scasey · 03-28-2018, 07:32 PM

An attachment would be a MIME multipart entry which procmail should see in the body of the message
Example:

Code:

------=_Part_97538_31053862.1521746603365
Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet; 
	name="somespreadsheetname.xlsx"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; 
	filename="somespreadsheetname.xlsx"

...so try a body recipe for Content-Type followed by name or filename on a subsequent line.
Don't have that off the top of my head, but

Code:

man procmailrc

might help...or the link frankbell provided

Use your email client's "view source" command or view the file in the Maildir directly with less or more to see what's procmail is working with.
If using the mbox format, you should be able to less the file, but will have to then search for an individual email with an attachment.

qrange · 03-30-2018, 08:18 AM

thanks scasey.
I'm using fetchmail, think its mbox format.
I've come up with this:

Code:

grep  -A3 'Content-Type:' email.txt  |grep -A2 name= |tr -d '\n' |sed -n 's/.*name="\(.*\)"Content-.*/\1/p'; echo

seems that filenames can get split across few lines.
if someone can verify, please do.
thanks.

edit: unfortunately this seem to return only first filename

scasey · 03-30-2018, 09:25 AM

What about something like (untested)

Code:

:0 B
filename=somefilename.xls
{
   ##route to whereever
}

...assumes you know the attachment name, of course.

qrange · 03-30-2018, 12:50 PM

trouble is, the text might contain 'name=' (one never can be sure...).
I don't know the exact attachment name, I'd need to use wildcards for 'routing' mail.

I need 'sed' to do multiple replace.

this sortof works:

Code:

grep  -A3 'Content-Type: application' email.txt  |grep -A2 name= |grep -o '".*"' |sed 's/"//g'

dunno what happens if filename contains "

scasey · 04-01-2018, 05:59 PM

Quote:

Originally Posted by qrange

dunno what happens if filename contains "

Send yourself an email with an attachment containing a " and see what happens