blob: b530ba3efff5c5dff22243aea714d45758467a9f (
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
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
|
# $NetBSD: locking.mk,v 1.5 2007/02/19 10:39:47 rillig Exp $
#
# This file provides the following .USE targets:
#
# acquire-lock
# Acquires a coarse-grained lock in WRKDIR.
#
# release-lock
# Releases the lock in WRKDIR.
#
# acquire-localbase-lock
# Acquires a coarse-grained lock in LOCALBASE.
#
# release-localbase-lock
# Releases the lock in LOCALBASE.
#
_WRKDIR_LOCKFILE= ${WRKDIR}/.lockfile
_LOCALBASE_LOCKFILE= ${LOCALBASE}/.lockfile
#
# Sanity checks.
#
.if ${PKGSRC_LOCKTYPE} == "none"
# No further checks.
.elif ${PKGSRC_LOCKTYPE} == "once" || ${PKGSRC_LOCKTYPE} == "sleep"
. if !defined(OBJHOSTNAME)
PKG_FAIL_REASON+= "[locking.mk] PKGSRC_LOCKTYPE needs OBJHOSTNAME defined."
# XXX: Why?
. endif
.else
PKG_FAIL_REASON+= "[locking.mk] PKGSRC_LOCKTYPE must be one of {none,once,sleep}, not ${PKGSRC_LOCKTYPE}."
.endif
#
# Needed tools.
#
.if ${PKGSRC_LOCKTYPE} != "none"
USE_TOOLS+= shlock
.endif
.if ${PKGSRC_LOCKTYPE} == "sleep"
USE_TOOLS+= sleep
.endif
#
# The commands.
#
_CHECK_IF_SHLOCK_IS_AVAILABLE_CMD= \
${TEST} -x ${SHLOCK:Q}"" || { \
${ERROR_MSG} "[locking.mk] shlock is not installed."; \
${ERROR_MSG} "[locking.mk] Please \"(cd ../../pkgtools/shlock && ${MAKE} install\")."; \
exit 1; \
}
_ACQUIRE_LOCK_CMD= \
${_CHECK_IF_SHLOCK_IS_AVAILABLE_CMD}; \
ppid=`${PS} -p $$$$ -o ppid | ${AWK} 'NR == 2 { print $$1 }'`; \
if ${TEST} -z "$$ppid"; then \
${ERROR_MSG} "No parent process ID found."; \
exit 1; \
fi; \
while ${TRUE}; do \
if ${TEST} -f /var/run/dmesg.boot -a -f "$$lockfile"; then \
rebooted=`${FIND} /var/run/dmesg.boot -newer "$$lockfile" -print`; \
if ${TEST} -n "$$rebooted"; then \
${STEP_MSG} "Removing stale $$lockfile"; \
${RM} -f "$$lockfile"; \
fi; \
fi; \
lockdir=`echo "$$lockfile" | sed "s,/[^/]*\$$,,"`; \
${MKDIR} "$$lockdir"; \
if ${SHLOCK} -f "$$lockfile" -p "$$ppid"; then \
break; \
fi; \
lockpid=`${CAT} "$$lockfile"`; \
case ${PKGSRC_LOCKTYPE:Q}"" in \
once) ${ERROR_MSG} "Lock ${.TARGET} is held by pid $$lockpid"; \
exit 1; \
;; \
sleep) ${STEP_MSG} "Lock ${.TARGET} is held by pid $$lockpid"; \
${SLEEP} ${PKGSRC_SLEEPSECS}; \
;; \
esac; \
done;
.if defined(PKG_VERBOSE)
_ACQUIRE_LOCK_CMD+= \
lockpid=`${CAT} "$$lockfile"`; \
${STEP_MSG} "Lock $$lockfile acquired for \`\`${.TARGET:S/^acquire-//:S/-lock$//}'' on behalf of process $$lockpid";
.endif
_RELEASE_LOCK_CMD= # nothing
.if defined(PKG_VERBOSE)
_RELEASE_LOCK_CMD+= \
lockpid=`${CAT} "$$lockfile"`; \
${STEP_MSG} "Lock $$lockfile released for \`\`${.TARGET:S/^release-//:S/-lock$//}'' on behalf of process $$lockpid";
.endif
_RELEASE_LOCK_CMD+= \
${RM} -f "$$lockfile"
#
# The targets.
#
.PHONY: acquire-lock release-lock
.PHONY: acquire-localbase-lock release-localbase-lock
.if ${PKGSRC_LOCKTYPE} == "none"
acquire-lock release-lock acquire-localbase-lock release-localbase-lock: .USE
@${DO_NADA}
.else
acquire-lock: .USE
${_PKG_SILENT}${_PKG_DEBUG} set -e; \
lockfile=${_WRKDIR_LOCKFILE}; \
${_ACQUIRE_LOCK_CMD}
release-lock: .USE
${_PKG_SILENT}${_PKG_DEBUG} set -e; \
lockfile=${_WRKDIR_LOCKFILE}; \
${_RELEASE_LOCK_CMD}
acquire-localbase-lock: .USE
${_PKG_SILENT}${_PKG_DEBUG} set -e; \
lockfile=${_LOCALBASE_LOCKFILE}; \
${_ACQUIRE_LOCK_CMD}
release-localbase-lock: .USE
${_PKG_SILENT}${_PKG_DEBUG} set -e; \
lockfile=${_LOCALBASE_LOCKFILE}; \
${_RELEASE_LOCK_CMD}
.endif
|
