blob: 83659155883d3e27176a6be2e0b416304dc68b17 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
#!/bin/sh
function init {
[ -n "$1" ] || printArgs
[ -f "$1" ] || cat >$1 </dev/null
}
function get {
[ -n "$2" ] || printArgs
grep -P "^$2\t" "$1" | cut -f3-
}
function update {
[ -n "$2" -a -n "$3" ] || printArgs
oldversion=$(grep -P "^$2\t" "$1" | cut -f2)
tmpfile="$1.update"
echo -e "$2\t$(($oldversion + 1 + $RANDOM))\t$3" > "$tmpfile"
merge "$1" "$tmpfile"
rm "$tmpfile"
}
function merge {
sort "$1" "$2" \
| {
oldkey=""
oldversion=0
oldval=""
while read key version val; do
if [ "$key" == "$oldkey" ]; then
if [ "$version" -gt "$oldversion" ]; then
oldversion="$version"
oldval="$val"
fi
else
[ -n "$oldkey" ] && echo -e "$oldkey\t$oldversion\t$oldval"
oldkey="$key"
oldversion="$version"
oldval="$val"
fi
done
[ -n "$oldkey" ] && echo -e "$oldkey\t$oldversion\t$oldval"
} > "$1~"
mv "$1~" "$1"
}
function printArgs {
echo -e "Usage:
$0 init table
$0 get table key
$0 update table key value
$0 merge table foreign-table"
exit -1
}
function checkTable {
[ -n "$1" ] || printArgs;
[ -f "$1" ] || {
echo "$1 is no P2P table";
printArgs;
}
}
case "$1" in
init)
checkTable "$2"
init "$2"
;;
get)
checkTable "$2"
get "$2" "$3"
;;
update)
checkTable "$2"
update "$2" "$3" "$4"
;;
merge)
checkTable "$2"
checkTable "$3"
merge "$2" "$3"
;;
*)
printArgs
;;
esac
|
