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 min_limit=7
  25
  26
  27 # spamassassin checking takes about 8 seconds. only do that every
  28 # once in a while.
  29 slow=false
  30 if [[ $1 == slow ]]; then
  31   slow=true
  32   shift
  33 fi
  34
  35 int=false
  36 if [[ $SUDO_USER || $SSH_CONNECTION ]]; then
  37   int=true
  38 fi
  39
  40 if [[ $1 == int ]]; then
  41   int=true
  42 fi
  43
  44 if [[ $1 == nonint ]]; then
  45   int=false
  46 fi
  47
  48
  49 if ! $int; then
  50   sleep 60
  51 fi
  52
  53 # avoid errors like this:
  54 # 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.
  55 #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.
  56 # i dont know why, i just found the solution online
  57 cd /m/md
  58
  59 case $HOSTNAME in
  60   bk)
  61     folders=(/m/md/{expertpathologyreview.com,amnimal.ninja}/testignore)
  62     froms=(ian@iankelling.org z@zroe.org testignore@je.b8.nz iank@gnu.org)
  63     ;;
  64   je)
  65     froms=(ian@iankelling.org z@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
  66     folders=(/m/md/je.b8.nz/testignore)
  67     ;;
  68   *)
  69     folders=(/m/md/l/testignore)
  70     froms=(testignore@je.b8.nz testignore@expertpathologyreview.com testignore@amnimal.ninja ian@iankelling.org z@zroe.org iank@gnu.org)
  71     if ! $int; then
  72       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
  73     fi
  74     ;;
  75 esac
  76
  77 getspamdpid() {
  78   if [[ ! $spamdpid || ! -d /proc/$spamdpid ]]; then
  79     spamdpid=$(systemctl show --property MainPID --value spamassassin | sed 's/^1$//' ||:)
  80   fi
  81 }
  82 getspamdpid
  83 pr() {
  84   cat >>/var/lib/prometheus/node-exporter/mailtest-check.prom.$$
  85 }
  86 pr <<EOF
  87 mailtest_check_found_spamd_pid_bool $(( ${spamdpid:-0} > 0 ))
  88 EOF
  89 e spamdpid: $spamdpid
  90 if [[ ! $spamdpid ]]; then
  91   echo $HOSTNAME mailtest spamd pid not found. systemctl status spamassassin:
  92   systemctl status spamassassin
  93 fi
  94 tmpfile=$(mktemp)
  95 declare -i unexpected=0
  96 for folder in ${folders[@]}; do
  97   for from in ${froms[@]}; do
  98     latest=
  99     last_sec=0
 100
 101     if ! grep -rlFx "From: $from" $folder/{new,cur} >$tmpfile; then
 102       e "no message found from: $from"
 103       continue
 104     fi
 105     # webmail sends them to cur it seems
 106     while read -r file; do
 107       if [[ $file -nt $latest ]]; then
 108         latest=$file
 109       fi
 110     done <$tmpfile
 111
 112     if [[ ! $latest ]]; then
 113       # 10 is an arbitrary bad value
 114       unexpected+=10
 115     else
 116       to=$(awk '/^Envelope-to: / {print $2}' $latest)
 117       last_sec=$(awk '/^Subject: / {print $4}' $latest)
 118
 119       if $slow; then
 120         if ! $int; then
 121           find $folder/new $folder/cur -type f -mmin +1080 -delete
 122         fi
 123         getspamdpid
 124         if [[ $spamdpid ]]; then
 125           if [[ $(readlink /proc/$$/ns/net) != "$(readlink /proc/$spamdpid/ns/net)" ]]; then
 126             spamcpre="nsenter -t $spamdpid -n -m"
 127           fi
 128
 129           declare -A results
 130           # pyzor fails for our test message, so dont put useless load on their
 131           # servers.
 132           # example line that sed is parsing:
 133           # (-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
 134           for r in $($spamcpre sudo -u Debian-exim spamassassin -t --cf='score PYZOR_CHECK 0' <"$latest" | tail -n2 | head -n1 | sed -r 's/^\([^)]*\) *//;s/=[^, ]*([, ]|$)/ /g'); do
 135             case $r in
 136               # got this in an update 2022-01. dun care
 137               T_SCC_BODY_TEXT_LINE|SCC_BODY_SINGLE_WORD) : ;;
 138               # we have a new domain, ignore this.
 139               # it seems like some versions of spamassassin do BODY_SINGLE_WORD, others dont, we dun care.
 140               # bayes_00 is a new one indicating ham, we dont care if its missing.
 141               BAYES_00|BODY_SINGLE_WORD|FROM_FMBLA_NEWDOM*|autolearn) : ;;
 142               SPF_HELO_NEUTRAL)
 143                 # some of my domains use neutral spf, treat them the same.
 144                 results[SPF_HELO_PASS]=t
 145                 ;;
 146               *)
 147                 results[$r]=t
 148                 ;;
 149             esac
 150           done
 151           # debugging
 152           # e results = ${!results[@]}
 153           missing=()
 154
 155           keys=(DKIM_SIGNED DKIM_VALID{,_AU,_EF} SPF_HELO_PASS SPF_PASS TVD_SPACE_RATIO)
 156           if [[ $to == *@gnu.org && $from == *@gnu.org ]]; then
 157             keys=(ALL_TRUSTED TVD_SPACE_RATIO)
 158           elif [[ $to == *@gnu.org ]]; then
 159             # eggs has RCVD_IN_DNSWL_MED
 160             keys+=(RCVD_IN_DNSWL_MED)
 161           elif [[ $from == *@gnu.org ]]; then
 162             # eggs has these
 163             keys+=(RCVD_IN_DNSWL_MED DKIMWL_WL_HIGH)
 164           fi
 165
 166           for t in  ${keys[@]}; do
 167             if [[ ${results[$t]} ]]; then
 168               unset "results[$t]"
 169             elif [[ $t == DKIM_VALID_EF && $from == *@[^.]*.[^.]*.[^.]* ]]; then
 170               :
 171               # third level domains dont hit this. its because
 172               # /usr/share/perl5/Mail/SpamAssassin/Plugin/DKIM.pm checks
 173               # if its signed with the registryboundaries domain. afaik:
 174               # we need the actual domain to sign it, this would result in
 175               # a second signature. I only use second level domains for
 176               # testing atm, fsf doesnt use them for anything but the
 177               # forum and I dont expect that to have any deliverability
 178               # problems.  So, not bothering atm.
 179             else
 180               missing+=($t)
 181             fi
 182           done
 183           if (( ${#results[@]} || ${#missing[@]} )); then
 184             printf "$HOSTNAME spamtest %s/%s\n" "$latest"
 185             if (( ${#results[@]} )); then
 186               printf "unexpected %s" "${!results[*]} "
 187             fi
 188             if (( ${#missing[@]} )); then
 189               printf "missing %s" "${missing[*]}"
 190             fi
 191             echo
 192             echo mailtest-check: cat $latest:
 193             cat $latest
 194             echo mailtest-check: end of cat
 195             printf "$(tput setaf 5 2>/dev/null ||:)█$(tput sgr0 2>/dev/null||:)%.0s" $(eval echo "{1..${COLUMNS:-60}}")
 196           fi
 197         fi # if spamdpid
 198       fi # if $slow
 199     fi # if [[ $latest ]]
 200
 201     now=$(date +%s)
 202     limit=$(( now - 60 * min_limit ))
 203     age_sec=$(( now - last_sec ))
 204     e $((age_sec / 60)):$(( age_sec % 60 )) ago. to:$to from:$from $latest
 205
 206     if (( last_sec <= limit )); then
 207       echo $HOSTNAME mailtest $folder $from $(date -d @$last_sec +'%a %m-%d %H:%M')
 208     fi
 209     # usec = unix seconds
 210     pr <<EOF
 211 mailtest_check_last_usec{folder="$folder",from="$from"} $last_sec
 212 EOF
 213   done
 214 done
 215 if $slow; then
 216   pr <<EOF
 217 mailtest_check_unexpected_spamd_results $unexpected
 218 EOF
 219 fi
 220 mv /var/lib/prometheus/node-exporter/mailtest-check.prom.$$ /var/lib/prometheus/node-exporter/mailtest-check.prom