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=8
  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   if [[ -e /var/lib/prometheus/node-exporter ]]; then
  85     cat >>/var/lib/prometheus/node-exporter/mailtest-check.prom.$$
  86   fi
  87 }
  88 pr <<EOF
  89 mailtest_check_found_spamd_pid_bool $(( ${spamdpid:-0} > 0 ))
  90 EOF
  91 e spamdpid: $spamdpid
  92 if [[ ! $spamdpid ]]; then
  93   echo $HOSTNAME mailtest spamd pid not found. systemctl status spamassassin:
  94   systemctl status spamassassin
  95 fi
  96 tmpfile=$(mktemp)
  97 declare -i unexpected=0
  98 for folder in ${folders[@]}; do
  99   for from in ${froms[@]}; do
 100     latest=
 101     last_sec=0
 102
 103     if ! grep -rlFx "From: $from" $folder/{new,cur} >$tmpfile; then
 104       e "no message found from: $from"
 105       continue
 106     fi
 107     # webmail sends them to cur it seems
 108     while read -r file; do
 109       if [[ $file -nt $latest ]]; then
 110         latest=$file
 111       fi
 112     done <$tmpfile
 113
 114     if [[ ! $latest ]]; then
 115       # 10 is an arbitrary bad value
 116       unexpected+=10
 117     else
 118       to=$(awk '/^Envelope-to: / {print $2}' $latest)
 119       last_sec=$(awk '/^Subject: / {print $4}' $latest)
 120
 121       if $slow; then
 122         if ! $int; then
 123           find $folder/new $folder/cur -type f -mmin +1080 -delete
 124         fi
 125         getspamdpid
 126         if [[ $spamdpid ]]; then
 127           if [[ $(readlink /proc/$$/ns/net) != "$(readlink /proc/$spamdpid/ns/net)" ]]; then
 128             spamcpre="nsenter -t $spamdpid -n -m"
 129           fi
 130
 131           declare -A results
 132           # pyzor fails for our test message, so dont put useless load on their
 133           # servers.
 134           # example line that sed is parsing:
 135           # (-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
 136           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
 137             case $r in
 138               # got this in an update 2022-01. dun care
 139               T_SCC_BODY_TEXT_LINE|SCC_BODY_SINGLE_WORD) : ;;
 140               # we have a new domain, ignore this.
 141               # it seems like some versions of spamassassin do BODY_SINGLE_WORD, others dont, we dun care.
 142               # bayes_00 is a new one indicating ham, we dont care if its missing.
 143               BAYES_00|BODY_SINGLE_WORD|FROM_FMBLA_NEWDOM*|autolearn) : ;;
 144               SPF_HELO_NEUTRAL)
 145                 # some of my domains use neutral spf, treat them the same.
 146                 results[SPF_HELO_PASS]=t
 147                 ;;
 148               *)
 149                 results[$r]=t
 150                 ;;
 151             esac
 152           done
 153           # debugging
 154           # e results = ${!results[@]}
 155           missing=()
 156
 157           keys=(DKIM_SIGNED DKIM_VALID{,_AU,_EF} SPF_HELO_PASS SPF_PASS TVD_SPACE_RATIO)
 158           if [[ $to == *@gnu.org && $from == *@gnu.org ]]; then
 159             keys=(ALL_TRUSTED TVD_SPACE_RATIO)
 160           elif [[ $to == *@gnu.org ]]; then
 161             # eggs has RCVD_IN_DNSWL_MED
 162             keys+=(RCVD_IN_DNSWL_MED)
 163           elif [[ $from == *@gnu.org ]]; then
 164             # eggs has these
 165             keys+=(RCVD_IN_DNSWL_MED DKIMWL_WL_HIGH)
 166           fi
 167
 168           for t in  ${keys[@]}; do
 169             if [[ ${results[$t]} ]]; then
 170               unset "results[$t]"
 171             elif [[ $t == DKIM_VALID_EF && $from == *@[^.]*.[^.]*.[^.]* ]]; then
 172               :
 173               # third level domains dont hit this. its because
 174               # /usr/share/perl5/Mail/SpamAssassin/Plugin/DKIM.pm checks
 175               # if its signed with the registryboundaries domain. afaik:
 176               # we need the actual domain to sign it, this would result in
 177               # a second signature. I only use second level domains for
 178               # testing atm, fsf doesnt use them for anything but the
 179               # forum and I dont expect that to have any deliverability
 180               # problems.  So, not bothering atm.
 181             else
 182               missing+=($t)
 183             fi
 184           done
 185           if (( ${#results[@]} || ${#missing[@]} )); then
 186             printf "$HOSTNAME spamtest %s/%s\n" "$latest"
 187             if (( ${#results[@]} )); then
 188               printf "unexpected %s" "${!results[*]} "
 189             fi
 190             if (( ${#missing[@]} )); then
 191               printf "missing %s" "${missing[*]}"
 192             fi
 193             echo
 194             echo mailtest-check: cat $latest:
 195             cat $latest
 196             echo mailtest-check: end of cat
 197             printf "$(tput setaf 5 2>/dev/null ||:)█$(tput sgr0 2>/dev/null||:)%.0s" $(eval echo "{1..${COLUMNS:-60}}")
 198           fi
 199         fi # if spamdpid
 200       fi # if $slow
 201     fi # if [[ $latest ]]
 202
 203     now=$(date +%s)
 204     limit=$(( now - 60 * min_limit ))
 205     age_sec=$(( now - last_sec ))
 206     e $((age_sec / 60)):$(( age_sec % 60 )) ago. to:$to from:$from $latest
 207
 208     if (( last_sec <= limit )); then
 209       echo $HOSTNAME mailtest $folder $from $(date -d @$last_sec +'%a %m-%d %H:%M')
 210     fi
 211     # usec = unix seconds
 212     pr <<EOF
 213 mailtest_check_last_usec{folder="$folder",from="$from"} $last_sec
 214 EOF
 215   done
 216 done
 217 if $slow; then
 218   pr <<EOF
 219 mailtest_check_unexpected_spamd_results $unexpected
 220 EOF
 221 fi
 222
 223 dir=/var/lib/prometheus/node-exporter
 224 if [[ -e $dir  ]]; then
 225   mv $dir/mailtest-check.prom.$$ $dir/mailtest-check.prom
 226 fi