The Class Action Script
The class action script creates a copy of each file that replaces an existing file and adds a corresponding line to the prototype file for the backout package. This is all done with fairly simple nawk scripts. The class action script receives a list of source/destination pairs consisting of ordinary files that do not match the corresponding installed files. Symbolic links and other non-files must be dealt with in the preinstall script.
# This class action script copies the files being replaced
# into a package being constructed in $BUILD_DIR. This class
# action script is only appropriate for regular files that
# are installed by simply copying them into place.
#
# For special package objects such as editable files, the patch
# producer must supply appropriate class action scripts.
#
# directory format options.
#
# @(#)i.script 1.6 96/05/10 SMI
#
# Copyright (c) 1995 by Sun Microsystems, Inc.
# All rights reserved
#
PATH=/usr/sadm/bin:$PATH
ECHO="/usr/bin/echo"
SED="/usr/bin/sed"
PKGPROTO="/usr/bin/pkgproto"
EXPR="/usr/bin/expr" # used by dirname
MKDIR="/usr/bin/mkdir"
CP="/usr/bin/cp"
RM="/usr/bin/rm"
MV="/usr/bin/mv"
recovery="no"
Pn=$$
procIdCtr=0
CMDS_USED="$ECHO $SED $PKGPROTO $EXPR $MKDIR $CP $RM $MV"
LIBS_USED=""
if [ "$PKG_INSTALL_ROOT" = "/" ]; then
PKG_INSTALL_ROOT=""
fi
# Check to see if this is a patch installation retry.
if [ "$INTERRUPTION" = "yes" ]; then
if [ -d "$PKG_INSTALL_ROOT/var/tmp/$Patch_label.$PKGINST" ] ||
\
[ -d "$PATCH_BUILD_DIR/$Patch_label.$PKGINST" ]; then
recovery="yes"
fi
fi
if [ -n "$PATCH_BUILD_DIR" -a -d "$PATCH_BUILD_DIR" ]; then
BUILD_DIR="$PATCH_BUILD_DIR/$Patch_label.$PKGINST"
else
BUILD_DIR="$PKG_INSTALL_ROOT/var/tmp/$Patch_label.$PKGINST"
fi
FILE_DIR=$BUILD_DIR/files
RELOC_DIR=$FILE_DIR/reloc
ROOT_DIR=$FILE_DIR/root
BO_Deletes=$FILE_DIR/deletes
PROGNAME=`basename $0`
if [ "$PATCH_PROGRESSIVE" = "true" ]; then
PATCH_NO_UNDO="true"
fi
# Since this is generic, figure out the class.
Class=`echo $PROGNAME | nawk ' { print substr($0, 3) }'`
# Since this is an update, $BASEDIR is guaranteed to be correct
BD=${BASEDIR:-/}
cd $BD
#
# First, figure out the dynamic libraries that can trip us up.
#
if [ -z "$PKG_INSTALL_ROOT" ]; then
if [ -x /usr/bin/ldd ]; then
LIB_LIST=`/usr/bin/ldd $CMDS_USED | sort -u | nawk '
$1 ~ /\// { continue; }
{ printf "%s ", $3 } '`
else
LIB_LIST="/usr/lib/libc.so.1 /usr/lib/libdl.so.1
\
/usr/lib/libw.so.1 /usr/lib/libintl.so.1 /usr/lib/libadm.so.1 \
/usr/lib/libelf.so.1"
fi
fi
#
# Now read the list of files in this class to be replaced. If the file
# is already in place, then this is a change and we need to copy it
# over to the build directory if undo is allowed. If it's a new entry
# (No $dst), then it goes in the deletes file for the backout package.
#
procIdCtr=0
while read src dst; do
if [ -z "$PKG_INSTALL_ROOT" ]; then
Chk_Path=$dst
for library in $LIB_LIST; do
if [ $Chk_Path = $library ]; then
$CP $dst $dst.$Pn
LIBS_USED="$LIBS_USED $dst.$Pn"
LD_PRELOAD="$LIBS_USED"
export LD_PRELOAD
fi
done
fi
if [ "$PATCH_PROGRESSIVE" = "true" ]; then
# If this is being used in an old-style patch, insert
# the old-style script commands here.
#XXXOld_CommandsXXX#
echo >/dev/null # dummy
fi
if [ "${PATCH_NO_UNDO}" != "true" ]; then
#
# Here we construct the path to the appropriate source
# tree for the build. First we try to strip BASEDIR. If
# there's no BASEDIR in the path, we presume that it is
# absolute and construct the target as an absolute path
# by stripping PKG_INSTALL_ROOT. FS_Path is the path to
# the file on the file system (for deletion purposes).
# Build_Path is the path to the object in the build
# environment.
#
if [ "$BD" = "/" ]; then
FS_Path=`$ECHO $dst | $SED s@"$BD"@@`
else
FS_Path=`$ECHO $dst | $SED s@"$BD/"@@`
fi
# If it's an absolute path the attempt to strip the
# BASEDIR will have failed.
if [ $dst = $FS_Path ]; then
if [ -z "$PKG_INSTALL_ROOT" ]; then
FS_Path=$dst
Build_Path="$ROOT_DIR$dst"
else
Build_Path="$ROOT_DIR`echo $dst | \
sed s@"$PKG_INSTALL_ROOT"@@`"
FS_Path=`echo $dst | \
sed s@"$PKG_INSTALL_ROOT"@@`
fi
else
Build_Path="$RELOC_DIR/$FS_Path"
fi
if [ -f $dst ]; then # If this is replacing something
cd $FILE_DIR
#
# Construct the prototype file entry. We replace
# the pointer to the filesystem object with the
# build directory object.
#
$PKGPROTO -c $Class $dst=$FS_Path | \
$SED -e s@=$dst@=$Build_Path@ >> \
$BUILD_DIR/prototype
# Now copy over the file
if [ "$recovery" = "no" ]; then
DirName=`dirname $Build_Path`
$MKDIR -p $DirName
$CP -p $dst $Build_Path
else
# If this file is already in the build area skip it
if [ -f "$Build_Path" ]; then
cd $BD
continue
else
DirName=`dirname $Build_Path`
if [ ! -d "$DirName" ]; then
$MKDIR -p $DirName
fi
$CP -p $dst $Build_Path
fi
fi
cd $BD
else # It's brand new
$ECHO $FS_Path >> $BO_Deletes
fi
fi
# If special processing is required for each src/dst pair,
# add that here.
#
#XXXSpecial_CommandsXXX#
#
$CP $src $dst.$$$procIdCtr
if [ $? -ne 0 ]; then
$RM $dst.$$$procIdCtr 1>/dev/null 2>&1
else
$MV -f $dst.$$$procIdCtr $dst
for library in $LIB_LIST; do
if [ "$library" = "$dst" ]; then
LD_PRELOAD="$dst"
export LD_PRELOAD
fi
done
fi
procIdCtr=`expr $procIdCtr + 1`
done
# If additional operations are required for this package, place
# those package-specific commands here.
#XXXSpecial_CommandsXXX#
#
# Release the dynamic libraries
#
for library in $LIBS_USED; do
$RM -f $library
done
exit 0
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