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
  61 case $HOSTNAME in
  62   bk)
  63     folders=(/m/md/{expertpathologyreview.com,amnimal.ninja}/testignore)
  64     froms=(ian@iankelling.org z@zroe.org testignore@je.b8.nz iank@gnu.org)
  65     ;;
  66   je)
  67     froms=(ian@iankelling.org z@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
  68     folders=(/m/md/je.b8.nz/testignore)
  69     ;;
  70   *)
  71     folders=(/m/md/l/testignore)
  72     froms=(testignore@je.b8.nz testignore@expertpathologyreview.com testignore@amnimal.ninja ian@iankelling.org z@zroe.org iank@gnu.org)
  73     if ! $int; then
  74       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
  75     fi
  76     ;;
  77 esac
  78
  79 getspamdpid() {
  80   if [[ ! $spamdpid || ! -d /proc/$spamdpid ]]; then
  81     # try twice in case we are restarting, it happens.
  82     for i in 1 2; do
  83       spamdpid=$(systemctl show --property MainPID --value spamassassin | sed 's/^[10]$//' ||:)
  84       if [[ $spamdpid ]]; then
  85         break
  86       fi
  87       sleep 30
  88     done
  89   fi
  90 }
  91 getspamdpid
  92 pr() {
  93   if [[ -e /var/lib/prometheus/node-exporter ]]; then
  94     cat >>/var/lib/prometheus/node-exporter/mailtest-check.prom.$$
  95   fi
  96 }
  97 pr <<EOF
  98 mailtest_check_found_spamd_pid_bool $(( ${spamdpid:-0} > 0 ))
  99 EOF
 100 e spamdpid: $spamdpid
 101 if [[ ! $spamdpid ]]; then
 102   echo $HOSTNAME mailtest spamd pid not found. systemctl status spamassassin:
 103   systemctl status spamassassin
 104 fi
 105 tmpfile=$(mktemp)
 106 declare -i unexpected=0
 107 for folder in ${folders[@]}; do
 108   for from in ${froms[@]}; do
 109     latest=
 110     last_sec=0
 111
 112     if ! grep -rlFx "From: $from" $folder/{new,cur} >$tmpfile; then
 113       e "no message found from: $from"
 114       continue
 115     fi
 116     # webmail sends them to cur it seems
 117     while read -r file; do
 118       if [[ $file -nt $latest ]]; then
 119         latest=$file
 120       fi
 121     done <$tmpfile
 122
 123     if [[ ! $latest ]]; then
 124       # 10 is an arbitrary bad value
 125       unexpected+=10
 126     else
 127       to=$(awk '/^Envelope-to: / {print $2}' $latest)
 128       last_sec=$(awk '/^Subject: / {print $4}' $latest)
 129
 130       if $slow; then
 131         if ! $int; then
 132           find $folder/new $folder/cur -type f -mmin +1080 -delete
 133         fi
 134         getspamdpid
 135         if [[ $spamdpid ]]; then
 136           if [[ $(readlink /proc/$$/ns/net) != "$(readlink /proc/$spamdpid/ns/net)" ]]; then
 137             spamcpre="nsenter -t $spamdpid -n -m"
 138           fi
 139
 140           declare -A results
 141           # pyzor fails for our test message, so dont put useless load on their
 142           # servers.
 143           # example line that sed is parsing:
 144           # (-0.1 / 5.0 requ) DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,SPF_HELO_PASS=-0.001,SPF_PASS=-0.001,TVD_SPACE_RATIO=0.001 autolearn=_AUTOLEARN
 145           raw_results="$($spamcpre sudo -u Debian-exim spamassassin -t --cf='score PYZOR_CHECK 0' <"$latest" | tail -n2 | head -n1 | sed -r 's/^\([^)]*\) *//;s/=[^, ]*([, ]|$)/ /g')"
 146           for r in $raw_results; do
 147             case $r in
 148               # got this in an update 2022-01. dun care
 149               T_SCC_BODY_TEXT_LINE|SCC_BODY_SINGLE_WORD) : ;;
 150               # we have a new domain, ignore this.
 151               # it seems like some versions of spamassassin do BODY_SINGLE_WORD, others dont, we dun care.
 152               # bayes_00 is a new one indicating ham, we dont care if its missing.
 153               BAYES_00|BODY_SINGLE_WORD|FROM_FMBLA_NEWDOM*|autolearn) : ;;
 154               SPF_HELO_NEUTRAL)
 155                 # some of my domains use neutral spf, treat them the same.
 156                 results[SPF_HELO_PASS]=t
 157                 ;;
 158               *)
 159                 results[$r]=t
 160                 ;;
 161             esac
 162           done
 163           # debugging
 164           # e results = ${!results[@]}
 165           missing=()
 166
 167           keys=(DKIM_SIGNED DKIM_VALID{,_AU,_EF} SPF_HELO_PASS SPF_PASS TVD_SPACE_RATIO)
 168           if [[ $to == *@gnu.org && $from == *@gnu.org ]]; then
 169             keys=(ALL_TRUSTED TVD_SPACE_RATIO)
 170           elif [[ $to == *@gnu.org ]]; then
 171             # eggs has RCVD_IN_DNSWL_MED
 172             keys+=(RCVD_IN_DNSWL_MED)
 173           elif [[ $from == *@gnu.org ]]; then
 174             # eggs has these
 175             keys+=(RCVD_IN_DNSWL_MED DKIMWL_WL_HIGH)
 176           fi
 177
 178           for t in  ${keys[@]}; do
 179             if [[ ${results[$t]} ]]; then
 180               unset "results[$t]"
 181             elif [[ $t == DKIM_VALID_EF && $from == *@[^.]*.[^.]*.[^.]* ]]; then
 182               :
 183               # third level domains dont hit this. its because
 184               # /usr/share/perl5/Mail/SpamAssassin/Plugin/DKIM.pm checks
 185               # if its signed with the registryboundaries domain. afaik:
 186               # we need the actual domain to sign it, this would result in
 187               # a second signature. I only use second level domains for
 188               # testing atm, fsf doesnt use them for anything but the
 189               # forum and I dont expect that to have any deliverability
 190               # problems.  So, not bothering atm.
 191             else
 192               missing+=($t)
 193             fi
 194           done
 195           if (( ${#results[@]} || ${#missing[@]} )); then
 196             printf "$HOSTNAME spamtest %s/%s\n" "$latest"
 197             if (( ${#results[@]} )); then
 198               printf "unexpected %s" "${!results[*]} "
 199             fi
 200             if (( ${#missing[@]} )); then
 201               printf "missing %s" "${missing[*]}"
 202             fi
 203             echo
 204             echo mailtest-check: cat $latest:
 205             cat $latest
 206             echo mailtest-check: end of cat
 207             printf "$(tput setaf 5 2>/dev/null ||:)█$(tput sgr0 2>/dev/null||:)%.0s" $(eval echo "{1..${COLUMNS:-60}}")
 208           fi
 209         fi # if spamdpid
 210       fi # if $slow
 211     fi # if [[ $latest ]]
 212
 213     now=$(date +%s)
 214     limit=$(( now - 60 * min_limit ))
 215     age_sec=$(( now - last_sec ))
 216     e $((age_sec / 60)):$(( age_sec % 60 )) ago. to:$to from:$from $latest
 217
 218     if (( last_sec <= limit )); then
 219       echo $HOSTNAME mailtest $folder $from $(date -d @$last_sec +'%a %m-%d %H:%M')
 220     fi
 221     # usec = unix seconds
 222     pr <<EOF
 223 mailtest_check_last_usec{folder="$folder",from="$from"} $last_sec
 224 EOF
 225   done
 226 done
 227 if $slow; then
 228   pr <<EOF
 229 mailtest_check_unexpected_spamd_results $unexpected
 230 EOF
 231 fi
 232
 233 dir=/var/lib/prometheus/node-exporter
 234 if [[ -e $dir  ]]; then
 235   mv $dir/mailtest-check.prom.$$ $dir/mailtest-check.prom
 236 fi