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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
#!/bin/sh
##
## Copyright 2007-2012 SRI International
##
## This file is part of the Computational Morphometry Toolkit.
##
## http://www.nitrc.org/projects/cmtk/
##
## The Computational Morphometry Toolkit is free software: you can
## redistribute it and/or modify it under the terms of the GNU General Public
## License as published by the Free Software Foundation, either version 3 of
## the License, or (at your option) any later version.
##
## The Computational Morphometry Toolkit is distributed in the hope that it
## will be useful, but WITHOUT ANY WARRANTY; without even the implied
## warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License along
## with the Computational Morphometry Toolkit. If not, see
## <http://www.gnu.org/licenses/>.
##
## $Revision: 4584 $
##
## $LastChangedDate: 2012-11-12 13:33:41 -0800 (Mon, 12 Nov 2012) $
##
## $LastChangedBy: torstenrohlfing $
##
##
## Helper functions for file locking and dependency checking using procmail's "lockfile" tool
##
# check whether file needs update due to updated dependencies
CMTK_needs_update()
{
local target=$1
if [ -e ${target}.lock ]; then
echo "========================================================================"
echo "TARGET LOCKED ${target}"
echo "========================================================================"
return 1
fi
shift
local sources="$*"
for source in ${sources}; do
if [ ! -e ${source} ]; then
if [ ! -e ${source}.gz ]; then
if [ ! -e ${source}.xz ]; then
echo "========================================================================"
echo "TARGET ${target}"
echo "MISSING SOURCE ${source}"
echo "========================================================================"
return 1
fi
fi
fi
if [ -e ${source}.lock ]; then
echo "========================================================================"
echo "TARGET ${target}"
echo "SOURCE LOCKED ${source}"
echo "========================================================================"
return 1
fi
done
if [ ! -e ${target} ]; then
echo "========================================================================"
echo "CREATE ${target}"
echo "========================================================================"
return 0
fi
local source
for source in ${sources}; do
if test ! -e ${source}; then
if test -e ${source}.gz; then
source=${source}.gz
else
if test -e ${source}.xz; then
source=${source}.xz
fi
fi
fi
if test ${target} -ot ${source}; then
echo "========================================================================"
echo "UPDATE ${target}"
echo "DUE TO ${source}"
echo "========================================================================"
return 0
fi
done
return 1
}
# NFS-safe (hopefully) file locking.
CMTK_lockfile_create()
{
local lockfile=$1.lock
mkdir -p `dirname ${lockfile}`
if lockfile -0 -r0 ${lockfile}; then
trap "rm -f ${lockfile}; exit" INT TERM EXIT
return 0
fi
return 1;
}
CMTK_lockfile_delete()
{
local file=${1}
local lockfile=${file}.lock
local realfile=${file}
[ -f ${realfile} ] || realfile=${file}.gz
[ -f ${realfile} ] || realfile=${file}.xz
if [ -f ${realfile} ]; then
# do not update timestamp if file is older than lock (i.e., existed before and did not get updated at all)
if test ${lockfile} -ot ${realfile}; then
touch --no-create -r ${lockfile} ${realfile}
fi
fi
rm -f ${lockfile}
trap - INT TERM EXIT
}
#
# Combine dependency checking with locking of target
#
CMTK_needs_update_and_lock()
{
local target=$1
local realtarget=$target
[ -e ${realtarget} ] || realtarget=${target}.gz
[ -e ${realtarget} ] || realtarget=${target}.xz
[ -e ${realtarget} ] || realtarget=${target}
shift
if CMTK_needs_update ${realtarget} $*; then
if CMTK_lockfile_create ${target}; then
return 0
else
echo "========================================================================"
echo "TARGET LOCKED ${target}"
echo "========================================================================"
fi
fi
return 1
}
|
