iankelling.org Git - distro-setup/blob - mailtest-check

   1 #!/bin/bash
   2
   3 # Usage: mail-test-check [slow] [anything]
   4 #
   5 # slow: do slow checks, like spamassassin
   6 #
   7 # anything: consider non-interactive, dont print unless something went
   8 # wrong
   9
  10
  11 source /b/errhandle/err
  12
  13 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
  14
  15 shopt -s nullglob
  16
  17 e() { $int || return 0; printf "mailtest-check: %s\n" "$*"; }
  18
  19
  20 ## Minutes before we give error.
  21 # We run this cronjob along with sending the test email every 5 minutes,
  22 # so give it 1 minute to arrive, then if the latest email is older than
  23 # 7 minutes, the last 2 haven't arrived in a reasonable amount of time.
  24 # However, when machines reboot things can get delayed, so add 10 mins,
  25 # not sure if that is a good number or not.
  26 min_limit=17
  27
  28
  29 # spamassassin checking takes about 8 seconds. only do that every
  30 # once in a while.
  31 slow=false
  32 if [[ $1 == slow ]]; then
  33   slow=true
  34   shift
  35 fi
  36
  37 int=false
  38 if [[ $SUDO_USER || $SSH_CONNECTION ]]; then
  39   int=true
  40 fi
  41
  42 if [[ $1 == int ]]; then
  43   int=true
  44 fi
  45
  46 if [[ $1 == nonint ]]; then
  47   int=false
  48 fi
  49
  50
  51 if ! $int; then
  52   sleep 60
  53 fi
  54
  55 # avoid errors like this:
  56 # Nov  8 08:16:05.439 [6080] warn: plugin: failed to parse plugin (from @INC): Can't locate Mail/SpamAssassin/Plugin/WLBLEval.pm: lib/Mail/SpamAssassin/Plugin/WLBLEval.pm: Permission denied at (eval 59) line 1.
  57 #Nov  8 08:16:05.439 [6080] warn: plugin: failed to parse plugin (from @INC): Can't locate Mail/SpamAssassin/Plugin/VBounce.pm: lib/Mail/SpamAssassin/Plugin/VBounce.pm: Permission denied at (eval 60) line 1.
  58 # i dont know why, i just found the solution online
  59 cd /m/md
  60 # TODO, get je to deliver the local mailbox: /m/md/INBOX
  61 # dovecot appears to setup, i can t be sure.
  62
  63 case $HOSTNAME in
  64   bk)
  65     folders=(/m/md/{expertpathologyreview.com,amnimal.ninja}/testignore)
  66     froms=(ian@iankelling.org z@zroe.org testignore@je.b8.nz iank@gnu.org)
  67     ;;
  68   je)
  69     froms=(ian@iankelling.org z@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
  70     folders=(/m/md/je.b8.nz/testignore)
  71     ;;
  72   *)
  73     folders=(/m/md/l/testignore)
  74     froms=(testignore@je.b8.nz testignore@expertpathologyreview.com testignore@amnimal.ninja ian@iankelling.org z@zroe.org iank@gnu.org)
  75     if ! $int; then
  76       timeout 120 rsync --chown iank:iank -e "ssh -oIdentitiesOnly=yes -F /dev/null -i /root/.ssh/jtuttle" -t --inplace -r 'jtuttle@fencepost.gnu.org:/home/j/jtuttle/Maildir/new/' /m/md/l/testignore/new
  77     fi
  78     ;;
  79 esac
  80
  81 getspamdpid() {
  82   if [[ ! $spamdpid || ! -d /proc/$spamdpid ]]; then
  83     # try twice in case we are restarting, it happens.
  84     for i in 1 2; do
  85       spamdpid=$(systemctl show --property MainPID --value spamassassin | sed 's/^[10]$//' ||:)
  86       if [[ $spamdpid ]]; then
  87         break
  88       fi
  89       sleep 30
  90     done
  91   fi
  92 }
  93 getspamdpid
  94 pr() {
  95   if [[ -e /var/lib/prometheus/node-exporter ]]; then
  96     cat >>/var/lib/prometheus/node-exporter/mailtest-check.prom.$$
  97   fi
  98 }
  99 pr <<EOF
 100 mailtest_check_found_spamd_pid_bool $(( ${spamdpid:-0} > 0 ))
 101 EOF
 102 e spamdpid: $spamdpid
 103 if [[ ! $spamdpid ]]; then
 104   echo $HOSTNAME mailtest spamd pid not found. systemctl status spamassassin:
 105   systemctl status spamassassin
 106 fi
 107 tmpfile=$(mktemp)
 108 declare -i unexpected=0
 109 for folder in ${folders[@]}; do
 110   for from in ${froms[@]}; do
 111     latest=
 112     last_sec=0
 113
 114     if ! grep -rlFx "From: $from" $folder/{new,cur} >$tmpfile; then
 115       e "no message found from: $from"
 116       continue
 117     fi
 118     # webmail sends them to cur it seems
 119     while read -r file; do
 120       if [[ $file -nt $latest ]]; then
 121         latest=$file
 122       fi
 123     done <$tmpfile
 124
 125     if [[ ! $latest ]]; then
 126       # 10 is an arbitrary bad value
 127       unexpected+=10
 128     else
 129       to=$(awk '/^Envelope-to: / {print $2}' $latest)
 130       last_sec=$(awk '/^Subject: / {print $4}' $latest)
 131
 132       if $slow; then
 133         if ! $int; then
 134           find $folder/new $folder/cur -type f -mmin +1080 -delete
 135         fi
 136         getspamdpid
 137         if [[ $spamdpid ]]; then
 138           if [[ $(readlink /proc/$$/ns/net) != "$(readlink /proc/$spamdpid/ns/net)" ]]; then
 139             spamcpre="nsenter -t $spamdpid -n -m"
 140           fi
 141
 142           declare -A results
 143           # pyzor fails for our test message, so dont put useless load on their
 144           # servers.
 145           # example line that sed is parsing:
 146           # (-0.1 / 5.0 requ) DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,SPF_HELO_PASS=-0.001,SPF_PASS=-0.001,TVD_SPACE_RATIO=0.001 autolearn=_AUTOLEARN
 147           raw_results="$($spamcpre sudo -u Debian-exim spamassassin -t --cf='score PYZOR_CHECK 0' <"$latest" | tail -n2 | head -n1 | sed -r 's/^\([^)]*\) *//;s/=[^, ]*([, ]|$)/ /g')"
 148           for r in $raw_results; do
 149             case $r in
 150               # got this in an update 2022-01. dun care
 151               T_SCC_BODY_TEXT_LINE|SCC_BODY_SINGLE_WORD) : ;;
 152               # we have a new domain, ignore this.
 153               # it seems like some versions of spamassassin do BODY_SINGLE_WORD, others dont, we dun care.
 154               # bayes_00 is a new one indicating ham, we dont care if its missing.
 155               BAYES_00|BODY_SINGLE_WORD|FROM_FMBLA_NEWDOM*|autolearn) : ;;
 156               SPF_HELO_NEUTRAL)
 157                 # some of my domains use neutral spf, treat them the same.
 158                 results[SPF_HELO_PASS]=t
 159                 ;;
 160               *)
 161                 results[$r]=t
 162                 ;;
 163             esac
 164           done
 165           # debugging
 166           # e results = ${!results[@]}
 167           missing=()
 168
 169           keys=(DKIM_SIGNED DKIM_VALID{,_AU,_EF} SPF_HELO_PASS SPF_PASS TVD_SPACE_RATIO)
 170           if [[ $to == *@gnu.org && $from == *@gnu.org ]]; then
 171             keys=(ALL_TRUSTED TVD_SPACE_RATIO)
 172           elif [[ $to == *@gnu.org ]]; then
 173             # eggs has RCVD_IN_DNSWL_MED
 174             keys+=(RCVD_IN_DNSWL_MED)
 175           elif [[ $from == *@gnu.org ]]; then
 176             # eggs has these
 177             keys+=(RCVD_IN_DNSWL_MED DKIMWL_WL_HIGH)
 178           fi
 179
 180           for t in  ${keys[@]}; do
 181             if [[ ${results[$t]} ]]; then
 182               unset "results[$t]"
 183             elif [[ $t == DKIM_VALID_EF && $from == *@[^.]*.[^.]*.[^.]* ]]; then
 184               :
 185               # third level domains dont hit this. its because
 186               # /usr/share/perl5/Mail/SpamAssassin/Plugin/DKIM.pm checks
 187               # if its signed with the registryboundaries domain. afaik:
 188               # we need the actual domain to sign it, this would result in
 189               # a second signature. I only use second level domains for
 190               # testing atm, fsf doesnt use them for anything but the
 191               # forum and I dont expect that to have any deliverability
 192               # problems.  So, not bothering atm.
 193             else
 194               missing+=($t)
 195             fi
 196           done
 197           if (( ${#results[@]} || ${#missing[@]} )); then
 198             printf "$HOSTNAME spamtest %s/%s\n" "$latest"
 199             if (( ${#results[@]} )); then
 200               printf "unexpected %s" "${!results[*]} "
 201             fi
 202             if (( ${#missing[@]} )); then
 203               printf "missing %s" "${missing[*]}"
 204             fi
 205             echo
 206             echo mailtest-check: cat $latest:
 207             cat $latest
 208             echo mailtest-check: end of cat
 209             printf "$(tput setaf 5 2>/dev/null ||:)█$(tput sgr0 2>/dev/null||:)%.0s" $(eval echo "{1..${COLUMNS:-60}}")
 210           fi
 211         fi # if spamdpid
 212       fi # if $slow
 213     fi # if [[ $latest ]]
 214
 215     now=$EPOCHSECONDS
 216     limit=$(( now - 60 * min_limit ))
 217     age_sec=$(( now - last_sec ))
 218     e $((age_sec / 60)):$(( age_sec % 60 )) ago. to:$to from:$from $latest
 219
 220     if (( last_sec <= limit )); then
 221       echo $HOSTNAME mailtest $folder $from $(date -d @$last_sec +'%a %m-%d %H:%M')
 222     fi
 223     # usec = unix seconds
 224     pr <<EOF
 225 mailtest_check_last_usec{folder="$folder",from="$from"} $last_sec
 226 EOF
 227   done
 228 done
 229 if $slow; then
 230   pr <<EOF
 231 mailtest_check_unexpected_spamd_results $unexpected
 232 EOF
 233 fi
 234
 235 dir=/var/lib/prometheus/node-exporter
 236 if [[ -e $dir  ]]; then
 237   mv $dir/mailtest-check.prom.$$ $dir/mailtest-check.prom
 238 fi