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1530 dpurdie 1 
#set -x
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# checkinstall script to validate backing out a patch.
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# directory format option.
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#
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#       @(#)patch_checkinstall 1.2 95/10/10 SMI
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#
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# Copyright (c) 1995 by Sun Microsystems, Inc.
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# All rights reserved
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#
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PATH=/usr/sadm/bin:$PATH
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LATER_MSG="PaTcH_MsG 6 ERROR: A later version of this patch is applied."
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NOPATCH_MSG="PaTcH_MsG 2 ERROR: Patch number $ACTIVE_PATCH is not installed"
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NEW_LIST=""
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# Get OLDLIST
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. $1
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#
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# Confirm that the patch that got us here is the latest one installed on
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# the system and remove it from PATCHLIST.
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#
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Is_Inst=0
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Skip=0
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active_base=`echo $ACTIVE_PATCH | nawk '
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	{ print substr($0, 1, match($0, "-")-1) } '`
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active_inst=`echo $ACTIVE_PATCH | nawk '
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	{ print substr($0, match($0, "-")+1) } '`
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for patchappl in ${OLDLIST}; do
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	appl_base=`echo $patchappl | nawk '
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		{ print substr($0, 1, match($0, "-")-1) } '`
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	if [ $appl_base = $active_base ]; then
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		appl_inst=`echo $patchappl | nawk '
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			{ print substr($0, match($0, "-")+1) } '`
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		result=`expr $appl_inst \> $active_inst`
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		if [ $result -eq 1 ]; then
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			puttext "$LATER_MSG"
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			exit 3
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		elif [ $appl_inst = $active_inst ]; then
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			Is_Inst=1
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			Skip=1
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		fi
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	fi
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	if [ $Skip = 1 ]; then
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		Skip=0
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	else
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		NEW_LIST="${NEW_LIST} $patchappl"
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	fi
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done
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if [ $Is_Inst = 0 ]; then
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	puttext "$NOPATCH_MSG"
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	exit 3
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fi
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#
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# OK, all's well. Now condition the key variables.
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#
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echo "PATCHLIST=${NEW_LIST}" >> $1
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echo "SUNW_PATCHID=" >> $1
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echo "PATCH_INFO_$ACTIVE_PATCH=backed out" >> $1
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# Get the current PATCH_OBSOLETES and condition it
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Old_Obsoletes=$PATCH_OBSOLETES
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echo $ACTIVE_OBSOLETES | sed 'y/\ /\n/' | \
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nawk -v PatchObsList="$Old_Obsoletes" '
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	BEGIN {
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		printf("PATCH_OBSOLETES=");
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		PatchCount=split(PatchObsList, PatchObsComp, " ");
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		for(PatchIndex in PatchObsComp) {
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			Atisat=match(PatchObsComp[PatchIndex], "@");
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			PatchObs[PatchIndex]=substr(PatchObsComp[PatchIndex], 0, Atisat-1);
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			PatchObsCnt[PatchIndex]=substr(PatchObsComp[PatchIndex], Atisat+1);
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		}
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	}
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	{
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		for(PatchIndex in PatchObs) {
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			if (PatchObs[PatchIndex] == $0) {
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				PatchObsCnt[PatchIndex]=PatchObsCnt[PatchIndex]-1;
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			}
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		}
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		next;
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	}
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	END {
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		for(PatchIndex in PatchObs) {
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			if ( PatchObsCnt[PatchIndex] > 0 ) {
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				printf("%s@%d ", PatchObs[PatchIndex], PatchObsCnt[PatchIndex]);
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			}
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		}
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		printf("\n");
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	} ' >> $1
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	# remove the used parameters
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	echo "ACTIVE_OBSOLETES=" >> $1
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	echo "SUNW_OBSOLETES=" >> $1
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exit 0
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