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only retrain spamtrapped ham
[etc/mailfilter.git] / bin / retrain
1 #!/bin/sh
2 set -eu
3
4 NICE='nice -20'
5 PROCMAIL="$HOME/.etc/mailfilter/procmail/procmailrc"
6
7 PAUSETIME=10
8
9 HAM=0
10 SPAM=0
11 MAILDIR=
12
13 for i in "$@"; do
14   case "$i" in
15     --ham) HAM=1;;
16     --spam) SPAM=1;;
17     *)
18       if [ -n "$MAILDIR" ]; then
19         echo "E: Maildir already specified: $i" >&2
20         exit 1
21       elif [ -d "$i"/cur ] && [ -d "$i"/new ] && [ -d "$i"/tmp ]; then
22         MAILDIR="$i"
23       else
24         echo "E: unknown argument: $i" >&2
25         exit 255
26       fi
27       ;;
28   esac
29 done
30
31 ARG=
32 case "$HAM/$SPAM" in
33   0/0)
34     echo "E: you need to specify either --ham or --spam." >&2
35     exit 255
36     ;;
37   1/1)
38     echo "E: you cannot specify both --ham and --spam." >&2
39     exit 255
40     ;;
41   0/1) ARG=--spam;;
42   1/0) ARG=--ham;;
43 esac
44
45 LOCKFILE="$MAILDIR/.retrain.lock"
46 trap "rm -f $LOCKFILE" 1 2 3 4 5 6 7 8 10 11 12 13 14 15
47 if ! lockfile -0 -r0 -l 3600 "$LOCKFILE" 2>/dev/null; then
48   echo "E: another retrain process is already running over that Maildir." >&2
49   exit 1
50 fi
51
52 find $MAILDIR/cur $MAILDIR/new -type f | while read msg; do
53   $NICE ${0%/*}/train $ARG "$msg" | $PROCMAIL || ret=$?
54   case "${ret:-0}" in
55     0|75) :;;
56   esac
57   rm -f "$msg"
58   sleep $PAUSETIME
59 done
60
61 rm -f "$LOCKFILE"
62 trap - 1 2 3 4 5 6 7 8 10 11 12 13 14 15
63
64 exit 0