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 getspamdpid() {
  20   if [[ ! $spamdpid || ! -d /proc/$spamdpid ]]; then
  21     # try twice in case we are restarting, it happens.
  22     for i in 1 2; do
  23       spamdpid=$(systemctl show --property MainPID --value spamassassin | sed 's/^[10]$//' ||:)
  24       if [[ $spamdpid ]]; then
  25         break
  26       fi
  27       sleep 30
  28     done
  29   fi
  30 }
  31 pr() {
  32   if $doprom && [[ -e /var/lib/prometheus/node-exporter ]]; then
  33     cat >>/var/lib/prometheus/node-exporter/mailtest-check.prom.$$
  34   fi
  35 }
  36
  37
  38 #### begin arg processing ####
  39 # spamassassin checking takes about 8 seconds.
  40 slow=false
  41 if [[ $1 == slow ]]; then
  42   slow=true
  43   shift
  44 fi
  45
  46 int=false
  47 if [[ $SUDO_USER || $SSH_CONNECTION ]]; then
  48   int=true
  49 fi
  50
  51 if [[ $1 == int ]]; then
  52   int=true
  53 fi
  54
  55 if [[ $1 == nonint ]]; then
  56   int=false
  57 fi
  58 #### end arg processing ####
  59
  60
  61 if ! $int; then
  62   sleep 60
  63 fi
  64
  65
  66 # TODO, get je to deliver the local mailbox: /m/md/INBOX
  67 # dovecot appears to setup, i can t be sure.
  68
  69 source /a/bin/bash_unpublished/source-state
  70
  71 doprom=false
  72 case $HOSTNAME in
  73   $MAIL_HOST|bk|je)
  74     doprom=true
  75     ;;
  76   *)
  77     rm -f /var/lib/prometheus/node-exporter/mailtest-check.prom*
  78     ;;
  79 esac
  80
  81 main() {
  82
  83   case $HOSTNAME in
  84     bk)
  85       folders=(/m/md/{expertpathologyreview.com,amnimal.ninja}/testignore)
  86       froms=(ian@iankelling.org z@zroe.org testignore@je.b8.nz iank@gnu.org)
  87       ;;
  88     je)
  89       froms=(ian@iankelling.org z@zroe.org iank@gnu.org testignore@amnimal.ninja)
  90       folders=(/m/md/je.b8.nz/testignore)
  91       ;;
  92     *)
  93       folders=(/m/md/l/testignore)
  94       froms=(testignore@je.b8.nz testignore@expertpathologyreview.com testignore@amnimal.ninja ian@iankelling.org z@zroe.org iank@gnu.org)
  95       if ! $int; then
  96         ### begin rsyncing fencepost email ###
  97         # We dont want to exit if rsync fails, that will get caught by
  98         # our later test by virtue of not having the latest email.
  99         did_rsync=false
 100         try_start_time=$EPOCHSECONDS
 101         try_limit=140 # somewhat arbitrary value
 102         while ! $did_rsync; do
 103           try_left=$(( try_limit - ( EPOCHSECONDS - try_start_time) ))
 104           timeout=120 # somewhat arbitrary value
 105           if (( try_left < 0 )); then
 106             break
 107           fi
 108           if (( try_left < timeout )); then
 109             timeout=$try_left
 110           fi
 111           if timeout $timeout 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; then
 112             did_rsync=true
 113           else
 114             sleep 4
 115           fi
 116         done
 117         if ! $did_rsync; then
 118           echo mailtest-check: warning: fencepost rsync failed
 119         fi
 120         ### end rsyncing fencepost email ###
 121       fi
 122       ;;
 123   esac
 124
 125
 126   # avoid errors like this:
 127   # 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.
 128   #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.
 129   # i dont know why, i just found the solution online
 130   cd /m/md
 131
 132
 133   getspamdpid
 134   # first time we write, overwrite anything existing
 135   if [[ -e /var/lib/prometheus/node-exporter ]]; then
 136     cat >/var/lib/prometheus/node-exporter/mailtest-check.prom.$$ <<EOF
 137 mailtest_check_found_spamd_pid_bool $(( ${spamdpid:-0} > 0 ))
 138 EOF
 139   fi
 140   e spamdpid: $spamdpid
 141   if [[ ! $spamdpid ]]; then
 142     echo mailtest spamd pid not found. systemctl status spamassassin:
 143     systemctl status spamassassin
 144   fi
 145   tmpfile=$(mktemp)
 146   declare -i unexpected=0
 147   declare -i missing_dnswl=0
 148   for folder in ${folders[@]}; do
 149     for from in ${froms[@]}; do
 150       latest=
 151       last_sec=0
 152
 153       if ! grep -rlFx "From: $from" $folder/{new,cur} >$tmpfile; then
 154         echo "no message found from: $from"
 155         continue
 156       fi
 157       # webmail sends them to cur it seems
 158       while read -r file; do
 159         file_sec=$(awk '/^Subject: / {print $4}' $file)
 160         if [[ $file_sec ]] && (( file_sec > last_sec )); then
 161           latest=$file
 162           last_sec="$file_sec"
 163         fi
 164       done <$tmpfile
 165       rm -f $tmpfile
 166
 167       to=$(awk '/^Envelope-to: / {print $2}' $latest)
 168
 169       if $slow; then
 170         if ! $int; then
 171           find $folder/new $folder/cur -type f -mmin +1080 -delete
 172         fi
 173         getspamdpid
 174         if [[ $spamdpid ]]; then
 175           if [[ $(readlink /proc/$$/ns/net) != "$(readlink /proc/$spamdpid/ns/net)" ]]; then
 176             spamcpre="nsenter -t $spamdpid -n -m"
 177           fi
 178           unset results
 179           declare -A results
 180           # pyzor fails for our test message, so dont put useless load on their
 181           # servers.
 182           # example line that sed is parsing:
 183           # (-0.1 / 5.0 requ) DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,SPF_HELO_PASS=-0.001,SPF_PASS=-0.001,TVD_SPACE_RATIO=0.001 autolearn=_AUTOLEARN
 184           resultfile=$(mktemp)
 185           $spamcpre sudo -u Debian-exim spamassassin -D -t --cf='score PYZOR_CHECK 0' <"$latest" &>$resultfile
 186
 187           # note: on some mail, its 1 line after the send-test-forward, on others its 2 with a blank inbetween.
 188           # I use the sed -n to filter this.
 189           raw_results="$(tail $resultfile | grep -A2 -Fx /usr/local/bin/send-test-forward | tail -n+2 | sed -nr 's/^\([^)]*\) *//;s/=[^, ]*([, ]|$)/ /gp')"
 190           for r in $raw_results; do
 191             case $r in
 192               # got this in an update 2022-01. dun care
 193               T_SCC_BODY_TEXT_LINE|SCC_BODY_SINGLE_WORD) : ;;
 194               # we have a new domain, ignore this.
 195               # it seems like some versions of spamassassin do BODY_SINGLE_WORD, others dont, we dun care.
 196               # bayes_00 is a new one indicating ham, we dont care if its missing.
 197               BAYES_00|BODY_SINGLE_WORD|FROM_FMBLA_NEWDOM*|autolearn) : ;;
 198               SPF_HELO_NEUTRAL)
 199                 # some of my domains use neutral spf, treat them the same.
 200                 results[SPF_HELO_PASS]=t
 201                 ;;
 202               *)
 203                 results[$r]=t
 204                 ;;
 205             esac
 206           done
 207           # debugging
 208           # e results = ${!results[@]}
 209           missing=()
 210
 211           keys=(DKIM_SIGNED DKIM_VALID{,_AU,_EF} SPF_HELO_PASS SPF_PASS TVD_SPACE_RATIO)
 212           if [[ $to == *@gnu.org && $from == *@gnu.org ]]; then
 213             keys=(ALL_TRUSTED TVD_SPACE_RATIO)
 214           elif [[ $to == *@gnu.org ]]; then
 215             # eggs has RCVD_IN_DNSWL_MED
 216             keys+=(RCVD_IN_DNSWL_MED)
 217           elif [[ $from == *@gnu.org ]]; then
 218             # eggs has these
 219             keys+=(RCVD_IN_DNSWL_MED DKIMWL_WL_HIGH)
 220           fi
 221
 222           for t in  ${keys[@]}; do
 223             if [[ ${results[$t]} ]]; then
 224               unset "results[$t]"
 225             elif [[ $t == DKIM_VALID_EF && $from == *@[^.]*.[^.]*.[^.]* ]]; then
 226               :
 227               # third level domains dont hit this. its because
 228               # /usr/share/perl5/Mail/SpamAssassin/Plugin/DKIM.pm checks
 229               # if its signed with the registryboundaries domain. afaik:
 230               # we need the actual domain to sign it, this would result in
 231               # a second signature. I only use second level domains for
 232               # testing atm, fsf doesnt use them for anything but the
 233               # forum and I dont expect that to have any deliverability
 234               # problems.  So, not bothering atm.
 235             else
 236               missing+=($t)
 237             fi
 238           done
 239           if (( ${#results[@]} || ${#missing[@]} )); then
 240             printf "$HOSTNAME spamtest %s\n" "$latest"
 241             if (( ${#results[@]} )); then
 242               printf "unexpected %s" "${!results[*]} "
 243             fi
 244             if (( ${#missing[@]} )); then
 245               printf "missing %s" "${missing[*]}"
 246             fi
 247             echo # ends our printf string buildup
 248             cat $resultfile
 249             echo mailtest-check: end of spam debug results
 250             # lets just handle 1 failure at a time in interactive mode.
 251             if $int; then
 252               echo mailtest-check: from: $from, to: $to
 253               exit 0
 254             fi
 255
 256             # less verbose debug output, commented since I might want it another time.
 257             # if $int; then
 258             #   echo mailtest-check: cat $latest:
 259             #   cat $latest
 260             #   echo mailtest-check: end of cat
 261             #   echo "$(tput setaf 5 2>/dev/null ||:)█$(tput sgr0 2>/dev/null||:)%.0s" $(eval echo "{1..${COLUMNS:-60}}")
 262             #fi
 263           fi
 264           rm -f $resultfile
 265           for r in ${results[@]}; do
 266             case $r in
 267               DKIM_INVALID|T_SPF_TEMPERROR|T_SPF_HELO_TEMPERROR)
 268                 missing_dnswl+=1
 269                 ;;
 270               *)
 271                 unexpected=$(( unexpected + 1 ))
 272                 ;;
 273             esac
 274           done
 275           for miss in ${missing[@]}; do
 276             # We expect dns failures from time to time, so
 277             # we count them separately and alert differently.
 278             case $miss in
 279               DKIM_VALID|DKIM_VALID_AU|DKIM_VALID_EF|SPF_HELO_PASS|SPF_PASS|RCVD_IN_DNSWL_MED|DKIMWL_WL_HIGH)
 280                 missing_dnswl+=1
 281                 ;;
 282               *)
 283                 unexpected+=1
 284                 ;;
 285             esac
 286           done
 287         fi # if spamdpid
 288       fi # if $slow
 289
 290       now=$EPOCHSECONDS
 291       age_sec=$(( now - last_sec ))
 292       e $((age_sec / 60)):$(( age_sec % 60 )) ago. to:$to from:$from $latest
 293
 294       # usec = unix seconds
 295       pr <<EOF
 296 mailtest_check_last_usec{folder="$folder",from="$from"} $last_sec
 297 EOF
 298     done # end for from in ${froms[@]}
 299   done # end for folder in ${folders[@]}
 300   if $slow; then
 301     pr <<EOF
 302 mailtest_check_missing_dnswl $missing_dnswl
 303 mailtest_check_unexpected_spamd_results $unexpected
 304 EOF
 305   fi
 306
 307   dir=/var/lib/prometheus/node-exporter
 308   if [[ -e $dir  ]]; then
 309     mv $dir/mailtest-check.prom.$$ $dir/mailtest-check.prom
 310     # note: node_textfile_mtime_seconds will tell us when this last happened. useful for debugging.
 311   fi
 312 }
 313
 314 loop-main() {
 315   # When running under systemd, the system just started. Ve nice and
 316   # give programs some time to finish their startup.
 317   sleep 10
 318   while true; do
 319     premain_sec=$EPOCHSECONDS
 320     main
 321     sleep $(( 300 - ( EPOCHSECONDS - premain_sec ) ))
 322   done
 323 }
 324
 325
 326 if [[ $INVOCATION_ID ]]; then
 327   loop-main
 328 else
 329   main
 330 fi
 331
 332 exit 0