[PATCH v2 1/3] send-email: Don't use FQDNs without a '.'

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Although Net::Domain::domainname attempts to be very thorough, the
host's configuration can still refuse to give a FQDN.  Check to see if
what we receive contains a dot as a basic sanity check.

Since the same condition is used twice and getting complex, let's move
it to a new function.

Signed-off-by: Brian Gernhardt <brian@xxxxxxxxxxxxxxxxxxxxx>
---
 git-send-email.perl |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/git-send-email.perl b/git-send-email.perl
index ce569a9..f491d44 100755
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -863,14 +863,19 @@ sub sanitize_address
 # This maildomain*() code is based on ideas in Perl library Test::Reporter
 # /usr/share/perl5/Test/Reporter/Mail/Util.pm ==> sub _maildomain ()
 
+sub valid_fqdn
+{
+	my $domain = $_[0];
+	return !($^O eq 'darwin' && $domain =~ /\.local$/) && $domain =~ /\./;
+}
+
 sub maildomain_net
 {
 	my $maildomain;
 
 	if (eval { require Net::Domain; 1 }) {
 		my $domain = Net::Domain::domainname();
-		$maildomain = $domain
-			unless $^O eq 'darwin' && $domain =~ /\.local$/;
+		$maildomain = $domain if valid_fqdn( $domain );
 	}
 
 	return $maildomain;
@@ -887,8 +892,7 @@ sub maildomain_mta
 				my $domain = $smtp->domain;
 				$smtp->quit;
 
-				$maildomain = $domain
-					unless $^O eq 'darwin' && $domain =~ /\.local$/;
+				$maildomain = $domain if valid_fqdn( $domain );
 
 				last if $maildomain;
 			}
-- 
1.7.1.rc0.243.g2ce66

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