Regular Expressions [bash]

dfarrall

dfarrall

dfarrall

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I'm trying to match up some email addresses using regular expressions in bash.
Currently got the expression
Code: 
"^[a-zA-Z0-9!#\$%&'\*\+/=?^_\`{|}~-]+(\.[a-zA-Z0-9!#\$%&'\*\+/=?^_\`{|}~-]+)*@([a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?\$"
Which successfully matches all the emails i need, however when trying to add the To: field i cant seem to get any matches and i'm not sure why.
This is my code with the To field.

Code: 
"^To:\s[a-zA-Z0-9!#\$%&'\*\+/=?^_\`{|}~-]+(\.[a-zA-Z0-9!#\$%&'\*\+/=?^_\`{|}~-]+)*@([a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?\$"

Which AFAIK should match up fine with "To: [email protected]" but doesn't :(
Any advice?
 
It has been a while since I used bash, but maybe try taking out the \s after the To: and just putting in the space (assuming it's always a single space), or adding \ .

e.g
Code: 
"^To:\ [a-zA-Z0-9!#\$%&'\*\+/=?^_\`{|}~-]+(\.[a-zA-Z0-9!#\$%&'\*\+/=?^_\`{|}~-]+)*@([a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?\$"

or
Code: 
"^To: [a-zA-Z0-9!#\$%&'\*\+/=?^_\`{|}~-]+(\.[a-zA-Z0-9!#\$%&'\*\+/=?^_\`{|}~-]+)*@([a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?\$"
 
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