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Needed help in understanding these procedures?

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Top Forums Shell Programming and Scripting Needed help in understanding these procedures?
# 1  
Old 05-26-2008
Needed help in understanding these procedures?
Hi all,
i needed some help in understanding a few procedures and how exactly is the sequence?
Code:
FINISHED="Done"

COLUMNS=$( stty -a | head -n 2 | cut -d " " -f2 |cut -d " " -f4 )
COLS=$((${COLUMNS} -${#FINISHED} - 5))


RET_ARR="\010"

KILLLINE=${RET_ARR}${RET_ARR}
for i in $(seq 1 $COLS)
do
    KILLLINE=${KILLLINE}${RET_ARR}
done


echo -n "0"
multiecho $(($COLS-4)) " "
echo '100%' ;


echo -n "|"
multiecho $COLS " "
echo -n "|"

PERCENTAGE=$(($COLS * $DESTFILESIZE / $SOURCEFILESIZE ))
       echo -e -n $KILLLINE"|"
    multiecho $PERCENTAGE "="

The destfile and the source file contain the size of respective ones..
I have not included them....
just pasted which part ive not understood
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mapiconcepts

mapiconcepts(3) 						MAPIClientLibraries						   mapiconcepts(3)

NAME

       mapiconcepts - MAPI Concepts

   MAPI objects
       Almost any MAPI data you access, read or edit is associated with an object. No matter whether you intend to browse mailbox hierarchy, open
       folders, create tables or access items (messages, appointments, contacts, tasks, notes), you will have to initialize and use MAPI objects:
       object understanding and manipulation is fundamental.

       o When developing MAPI clients with Microsoft framework, instantiated objects inherit from parent classes. As a matter of fact, developers
	 know which methods they can apply to objects and we suppose it makes their life easier.

       o In OpenChange, objects are opaque. They are generic data structures which content is set and accessed through MAPI public functions.
	 Therefore, Linux MAPI developers must know what they are doing.

       An example of MAPI object manipulation is shown below:

       mapi_object     obj_store;

       [...]

       mapi_object_init(&obj_store);
       retval = OpenMsgStore(&obj_store);
       if (retval != MAPI_E_SUCCESS) {
	       mapi_errstr('OpenMsgStore', GetLastError());
	       exit (1);
       }
       mapi_object_release(&obj_store);

   MAPI Handles
       Beyond memory management considerations, understanding MAPI handles role in object manipulation provides a better understanding why
       mapi_object_release() matters.

       Handles are temporary identifiers returned by Exchange when you access or create objects on the server. They are used to make reference to
       a particular object all along its session lifetime. They are stored in unsigned integers, are unique for each object but temporary along
       MAPI session. Handles are the only links between objects accessed on the client side and efficiently stored on the server side.

       Although OpenChange MAPI makes handles manipulation transparent for developers, mapi_object_release() frees both the allocated memory for
       the object on client side, but also releases the object on the server.

Version 1.0							  Sat Jun 14 2014						   mapiconcepts(3)