test

应用程序包开发者指南

在安装时创建文件并在删除期间保存文件

在此案例研究中，将在安装时创建一个数据库文件，并在删除软件包时保存数据库副本。

技术

此案例研究展示以下技术：

方法

要为此案例研究在安装时创建一个数据库文件，并在删除时保存副本，您必须完成以下任务：

案例研究文件

pkginfo 文件

PKG=krazy
NAME=KrAzY Applications
CATEGORY=applications
BASEDIR=/opt
ARCH=SPARC
VERSION=Version 1
CLASSES=none cfgdata admin

prototype 文件

i pkginfo
i request
i i.admin
i r.cfgdata
d none bin 555 root sys
f none bin/process1 555 root other
f none bin/process2 555 root other
f none bin/process3 555 root other
f admin bin/config 500 root sys
d admin cfg 555 root sys
f admin cfg/datafile1 444 root sys
f admin cfg/datafile2 444 root sys
f admin cfg/datafile3 444 root sys
f admin cfg/datafile4 444 root sys
d cfgdata data 555 root sys

space 文件

# extra space required by config data which is
# dynamically loaded onto the system
data 500 1

i.admin 类操作脚本

# PKGINST parameter provided by installation service
# BASEDIR parameter provided by installation service
while read src dest
do
   cp $src $dest || exit 2
done
# if this is the last time this script will be executed
# during the installation, do additional processing here.
if [ "$1" = ENDOFCLASS ]
then
# our config process will create a data file based on any changes
# made by installing files in this class; make sure the data file
# is in class `cfgdata' so special rules can apply to it during
# package removal.
   installf -c cfgdata $PKGINST $BASEDIR/data/config.data f 444 root
   sys || exit 2
   $BASEDIR/bin/config > $BASEDIR/data/config.data || exit 2
   installf -f -c cfgdata $PKGINST || exit 2
fi
exit 0

这里举例说明了一个很少见的实例，其中 installf 适用于类操作脚本。由于 space 文件用于在特定文件系统上保留空间，因此即使该新文件没有包括在 pkgmap 文件中也可以被安全地添加。

r.cfgdata 删除脚本

# the product manager for this package has suggested that
# the configuration data is so valuable that it should be
# backed up to $PKGSAV before it is removed!
while read path
do
# path names appear in reverse lexical order.
   mv $path $PKGSAV || exit 2
   rm -f $path || exit 2
done
exit 0