tgeneric - plan9port - [fork] Plan 9 from user space
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tgeneric (4175B)
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1 #!/usr/local/plan9/bin/rc
2
3 rfork s
4
5 if (! ~ $DEBUG '') flag x +
6
7 LPDELAY=60
8
9 if (! ~ $#* 2 && ! ~ $#* 3) {
10 echo 'usage generic local_cmd _remote_cmd [ success_cmd ]' >[1=2]
11 exit 'argument count'
12 }
13 LOCAL_CMD=$1
14 REMOTE_CMD=$2
15 SUCCESS_CMD=$3
16
17 # we don't want to make a LOCK file unless we are at the destination
18 # let the spooler take care of moving it there
19 # this is necessary for clients and servers that share the
20 # same lp queue directory
21 if (! ~ $THIS_HOST $DEST_HOST || ! LOCK $LPSPOOL/$LPDEST/LOCK $THIS_HOST $pid) exit ''
22
23 cd $LPSPOOL
24
25 MAXTRY=2
26 PRINTLOG=$LPLOGDIR/$LPDEST^.st
27
28 fn schedule{
29 FILE=`{lpsub sched $SCHED $LPDEST}
30 }
31
32 while (schedule; ! ~ $#FILE 0) {
33 SCHEDLINE=`{cat $LPDEST/$FILE(1)^id}
34 LSLINE=`{ls -l $LPDEST/$FILE(1)}
35 echo `{date} start $SCHEDLINE
36 if (! test -s $LPDEST/.seqno) {
37 echo 0 > $LPDEST/.seqno
38 }
39 if not {
40 LPSEQNO = `{cat $LPDEST/.seqno | awk '{seqno = $1 + 1; if (seqno > 999) seqno = 0; print seqno}'}
41 echo $LPSEQNO > $LPDEST/.seqno
42 }
43 STARTIME=`{date}
44 if (! test -s $LPDEST/$FILE(1)) {
45 echo `{date} file $LPDEST/$FILE(1) disappeared or is empty
46 ls -l $LPDEST
47 echo $SCHEDLINE(2)$SCHEDLINE(4)' '$SCHEDLINE(3) $SCHEDLINE(5)' ! '$LSLINE(6) $STARTIME(4) >> $LPLOG
48 rm -f $LPDEST/$FILE $LPDEST/$FILE^id
49 }
50 if not {
51 if (~ $THIS_HOST $DEST_HOST) {
52 if (test -f $LPLIB/perm/$LPDEST && grep -s $SCHEDLINE(2) $LPLIB/perm/$LPDEST) {
53 echo `{date} permission denied
54 echo you are not allowed to use printer $LPDEST | mail $SCHEDLINE(2)
55 rm -f $LPDEST/$FILE(1) $LPDEST/$FILE(1)^id
56 }
57 if not {
58 echo `{date} sending to printer
59 > $PRINTLOG
60 STARTIME=`{date}
61 @{eval $LOCAL_CMD}
62 rv=$status
63 ENDTIME=`{date}
64 status=$rv
65 if () {
66 echo $SCHEDLINE(1)^$SCHEDLINE(3)' '$SCHEDLINE(2)' '$SCHEDLINE(4)' + '$LSLINE(6)' '$STARTIME(4)' '$ENDTIME(4)
67 eval $SUCCESS_CMD
68 rm -f $LPDEST/$FILE(1) $LPDEST/$FILE(1)^id
69 }
70 if not {
71 echo $SCHEDLINE(1)^$SCHEDLINE(3)' '$SCHEDLINE(2)' '$SCHEDLINE(4)' - '$LSLINE(6)' '$STARTIME(4)' '$ENDTIME(4)' status='$rv
72 THISTRY=`{echo $SCHEDLINE(4) + 1|hoc}
73 echo $SCHEDLINE(1) $SCHEDLINE(2) $SCHEDLINE(3) $THISTRY >$LPDEST/$FILE(1)^id
74 if (test $THISTRY -ge $MAXTRY) {
75 if (test -d $LPLIB/prob/$LPDEST) {
76 cp $LPDEST/$FILE(1) $LPLIB/prob/$LPDEST
77 cp $LPDEST/$FILE(1)^id $LPLIB/prob/$LPDEST
78 cp $PRINTLOG $LPLIB/prob/$LPDEST/$FILE(1)^log
79 }
80 upasname=daemon
81 mail $SCHEDLINE(2) <<endmail1
82 rm -f $LPDEST/$FILE(1) $LPDEST/$FILE(1)^id
83 }
84 if not {
85 touch $LPDEST/$FILE(1)
86 sleep $LPDELAY
87 }
88 }
89 }
90 }
91 if not {
92 # we don't want to be here
93 # trap '' 13 # temp hack: ignore SIGPIPE
94 echo `{date} queuing - should not get here
95 STARTIME=`{date}
96 eval $REMOTE_CMD
97 rv=$status
98 ENDTIME=`{date}
99 if (~ $rv '') {
100 echo $SCHEDLINE(1)^$SCHEDLINE(3)' '$SCHEDLINE(2)' '$SCHEDLINE(4)' + '$LSLINE(6)' '$STARTIME(4)' '$ENDTIME(4)
101 rm -f $LPDEST/$FILE(1) $LPDEST/$FILE(1)^id
102 }
103 if not {
104 echo $SCHEDLINE(1)^$SCHEDLINE(3)' '$SCHEDLINE(2)' '$SCHEDLINE(4)' - '$LSLINE(6)' '$STARTIME(4)' '$ENDTIME(4)
105 echo status $rv from '$REMOTE_CMD'
106 THISTRY=`{echo $SCHEDLINE(4) + 1|hoc}
107 echo $SCHEDLINE(1) $SCHEDLINE(2) $SCHEDLINE(3) $THISTRY >$LPDEST/$FILE(1)^id
108 if (~ $THISTRY $MAXTRY) {
109 upasname=daemon
110 mail $SCHEDLINE(2) <<endmail2
111 }
112 if not {
113 touch $LPDEST/$FILE(1)
114 sleep $LPDELAY
115
116 # this is here to deal with running out of
117 # Datakit channels or other stupid problems
118 # backoff connection attempts but not too long
119 LPDELAY=`{echo $LPDELAY '*' 2|hoc}
120 if (test $LPDELAY -gt 960)
121 LPDELAY=60
122 }
123 }
124 }
125 }
126 }
127 Your job has failed to print on $LPDEST after $MAXTRY attempt(s).
128 If the directory $LPLIB/prob/$LPDEST exists on $DEST_HOST,
129 the file has been put there along with the printer log file.
130 Your friendly printer daemon
131 endmail1
132 Your job has failed to print on $LPDEST after $MAXTRY attempt(s).
133 There is a problem in sending the job to $DEST_HOST,
134 but I'll keep trying. Have a nice day.
135 Your enthusiastic printer daemon
136 endmail2
137 UNLOCK $LPSPOOL/$LPDEST
138 rm $LPSPOOL/$LPDEST >[2]/dev/null