From 865e66a4b1a536b024a1db7431ded7a24a84e598 Mon Sep 17 00:00:00 2001
From: Sergey Poznyakoff <gray@gnu.org.ua>
Date: Fri, 26 Jun 2020 12:06:25 +0300
Subject: Fix formatting of mail headers

* lib/beam/common.in (construct_mail_header): New function.
(mail_report): Build mail headers using construct_mail_header.
---
 lib/beam/common.in | 27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

(limited to 'lib/beam/common.in')

diff --git a/lib/beam/common.in b/lib/beam/common.in
index e8389f9..4d6442f 100644
--- a/lib/beam/common.in
+++ b/lib/beam/common.in
@@ -197,6 +197,19 @@ dry_mail() {
     echo "============================================================="
 }
 
+# construct_mail_header NAME VALUE
+construct_mail_header() {
+    local name value
+    name=$(echo "mail_header_$1"|tr 'A-Z' 'a-z'|tr '-' '_')
+    value=$(echo "$1: $2" |\
+		tr '\n' ' ' |\
+		tr '\t' ' ' |\
+		tr -s ' ' |\
+		fmt -w64 -s |\
+		sed -e '2,$s/^/ /')
+    eval $name='$value'
+}
+
 # mail_report FILE
 mail_report() {
     : ${backup_mailer_program:=/usr/sbin/sendmail -oi -t -F $backup_sender_email}
@@ -223,11 +236,15 @@ mail_report() {
     fi
     test -n "$backup_report_signature" &&
         echo "$backup_report_signature" >> $report
-    (cat - <<EOF
-From: ${backup_sender_personal}$backup_sender_email
-To: $backup_notify_email
-Subject: $backup_report_subject
-X-Beam-Items: $backup_items
+    (construct_mail_header From "${backup_sender_personal}$backup_sender_email"
+     construct_mail_header To "$backup_notify_email"
+     construct_mail_header Subject "$backup_report_subject"
+     construct_mail_header X-Beam-Items "$backup_items"
+     cat - <<EOF
+$mail_header_from
+$mail_header_to
+$mail_header_subject
+$mail_header_x_beam_items
 X-Beam-Round: $round
 X-Beam-Level: $level
 EOF
-- 
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