Re: egrep matches, but procmail recipe not

On 2015-08-16 11:06 +0200, Eric Smith wrote:

> The following (negative) procmail patterns do not match:
> 
> :0:
> * ! ^(Subject|From):.*sunglas
> * ! ^(Subject|From):.*Sunglasses
> * ! ^(Subject|From):.*Oakley
> * ! ^(Subject|From):.*Ray*Ban
> * ! ^(Subject|From):.*?utf-
> 
> procmail logs:
> procmail: Match on ! "^(Subject|From):.*sunglas"
> procmail: Match on ! "^(Subject|From):.*Sunglasses"
> procmail: Match on ! "^(Subject|From):.*Oakley"
> procmail: Match on ! "^(Subject|From):.*Ray*Ban"
> procmail: Match on ! "^(Subject|From):.*?utf-"
> 
> However, when I test with egrep for a (positive) match with these
> patterns, then they do match.
> 
> $ cat test_patterns
> ^(Subject|From):.*sunglas
> ^(Subject|From):.*Sunglasses
> ^(Subject|From):.*Oakley
> ^(Subject|From):.*Ray*Ban
> ^(Subject|From):.*?utf-
> 
> $ egrep -i -f test_patterns rayban.mail
> From: "RayBan Sunglasses" <[email protected]>
> Subject: =?utf-8?B?UmF5QmFuIFN1bmdsYXNzZXMgIiA=?=
> From: "RayBan Sunglasses" <[email protected]>
> Subject: =?utf-8?B?UmF5QmFuIFN1bmdsYXNzZXMgIiA=?=

Is rayban.mail a valid email message, and do these lines occur in its
header?  By default procmail recipe conditions only search the header,
the body is ignored.  This can be changed with the B flag.

Since grep -f searches for _any_ of the patterns in the file, it would
help running it with one pattern at a time, so you know which one
actually matched.  As it is you don't know.

Lastly, some of the patterns probably don't do quite what you want.  ?
is an extended regexp metacharacter, and Ray*Ban matches RaBan but not
RayxxxBan.

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