Author Credits and Introduction to LU
Why Use Libraries?
Why Not Use Libraries?
How to Use the Library Utility LU
Summary of Operators
LU Command Line Forms
Advanced Features of LU
CAUTIONS
LRUNZ Command
LDIRZ Command
LRUNZ as an Extended Command Processor Under ZCPR2
:Author Credits and Introduction to LU

    Thi�  documen� applie� t� versio� 1.1� o� LU.COM��  I� als� �
applie� t� Versio� 1.� o� LDIR� b� Richar� Con� an� Versio� 1.� �
o� LRUNڠ b� Richar� Con� (whic� wa� derive� fro� LRUΠ b�� Gar� �
Novosielski).

Copyright (c) 1982 Gary P. Novosielski
All rights reserved.

    Permissio�  i�  hereb�  grante�  t� cop� an� distribut� thi� �
documen�  fo�  an�  non-commercia�  purpose�� An� us� o� thi� �
materia�  fo�  commercia�  advantag�  withou�  prio� writte� �
consen� o� th� autho� i� prohibited.

    ɠ hav� modifie� th� origina� documen� fo� inclusio� i� � �
HELР fil� an� elaborate� o� th� subjec� wit� documentatio� o� �
LRUNZ and LDIRZ.


                         INTRODUCTION

    Librar�  Utilit�  (LU�  i�  �  progra� t� allo� combinin� o� �
multilpl�  file�  int�  on�  large�  file��  I� require� CP/� �
versio�  2.�  o�  highe�  t�  run�  L�  run� unde� ZCPR2.

    Thi� large� fil� i� divide� int� tw� basi� part� -- th� �
director�� (a� th� fron� o� th� file� an� th� file� o� th� �
library�  Th� director� informatio� i� store� i� th� sam� fil� a� �
th�  data��  o�  membe�  files��  Th�  amoun�  o�  spac� t� b� �
allocate�  t�  th�  director�  mus� b� specifie� b� th� use� whe�  �
�  ne� librar� i� created�� bu� ca� b� change� whe� th� fil�  i� �
reorganized� Th� siz� o� eac� director� entr� i� 3� bytes�  whic�  �
mean� eac� fou� director� entrie� tak� u� on� secto�  o� th� �
librar� file�� Currentl� onl� 1� byte� o� eac� entr�  ar�  used�  �
wit� 1�� byte� bein� reserve� fo� us� wit� possibl�  futur� �
enhancements�� Th� director� itsel� use� on� entr�  fo�  contro�  �
information�� s� th� numbe� o� director� sector�  neede�  fo�  � �
librar� o� � member� i� (� � 1� � 4� rounde� u� t� th� nex� whol� �
number.

    Th�  use� nee� no� b� concerne� wit� thi� discussio� a� �
director��  siz�  i� calculate� b� th� program�� Al� director� �
size�  ar�  inpu� an� outpu� i� term� o� entries�� eac� entr� �
bein� � potentia� membe� file� Th� progra� adjust� director� siz� �
t� a� integra� numbe� o� sectors.

    LRUNڠ  i�  �  smal� progra� whic� allow� runnin�  �  .CO� �
(objec� code� fil� membe� directl� fro� an�� library��  withou�  �
havin�  t�  extrac� i� t� � separat� dis� file���  I� i� �
specificall�� intende� t� b� use� wit� � defaul� COMMAND.LB� fil� �
under ZCPR2 and can be used as an Extended Command Processor.

    LDIR� i� � progra� whic� allow� th� use� t� displa� � sorte� �
director� o� th� file� i� � defaul� COMMAND.LB� file��  Simpl� i� �
nature�� LDIRڠ give� th� use� th� abilit� t� selec� group� o� �
file� vi� wil� card� an� displa� � sorte� listin� whic� include� �
individual file sizes.

:Why Use Libraries?

    First��  � librar� fil� usuall� take� u� les� spac� tha� th� �
tota� o� th� individua� membe� file� whic� wen� int� it��  Th�  �
reaso�  fo�  thi�  i� tha� CP/� allocate� dis� spac� i� fixe�  �
block�  o� groups�� typicall� 2� byte� each� An� spac� afte�  th�  �
las�  secto�  o�  � fil� u� t� th� nex� 2� bloc� boundr��  i� �
wasted�� Th� sam� file� i� � librar� us� onl�� th� numbe� o� �
sector� the� actuall� need�� an� thoug� th� librar� itsel�  ma�  �
hav�  �  partiall� waste� bloc� a� th� end�� an� require�   som�  �
spac�  fo�  director�  informatio�  a�  th� beginning��  th�  ne�  �
effec�  i�  usuall�  � savin� o� tota� space��  Th�  bes� result� �
ar� see� whe� man� smal� file� ar� combine� int� on� library.

    Second�  � librar� fil� make� mos� efficien� us� o� th� CP/� �
dis� directory�� sinc� i� i� treate� a� onl� on� fil� b�� CP/� �
regardles� o� ho� man� member� i� contains.


    Third��  librarie�  ca�  ai� i� transferrin� package� o� �
softwar�  fro�  on� syste� t� anothe� usin� XMODEM� Onl� on� fil�  �
i� transferred�� eliminatin� th� nee� t� ru� th� XMODE͠  ransfe�  �
progra� severa� times�� th� chanc� o� overlookin� � neede�  file� �
an� th� problem� o� namin� conflicts�� (suc� a� READ.MРfiles� �
amon� unrelate� packages.



:Why Not Use Libraries?

    Ther�   ar�  som�  ver�  goo�  reason�  fo�  no�  usin� �
libraries��  Fo� on� thing�� file� withi� � librar�� ar� no� �
availabl� t�  mos� "normal� programs�� I� � frequentl�� accesse� �
fil� i� place�  i�  � library�� i� wil� hav� t� b� extracte� fro� �
th� librar�  t�  it�  free-standin� counterpar� befor� i� ca� b� �
use�  b��  �  program�� (.CO� file� ar� � notabl� exceptio� t� �
this��  becaus�  o�  th�  availabilit�  o�  th� LRUNڠ command� �
covere� later.)

    Librarie�  ca�  actuall�  wast� dis� space� Whe� � dis� fil�  �
i� erased�� CP/� return� th� spac� formerl� use� b� th� fil�  t�  �
th�  fre�  spac� poo� fo� us� b� ne� files�� Whe� � membe�  fil�  �
i�  delete�  fro� � librar�� however�� th� spac� previousl�  �
occupie� b�� th� fil� i� no� useable�� Th� librar�� mus�  b�  �
reorganize�  t� mak� thi� spac� availabl� t� CP/M��  Whil�  thi�  �
i�  eas�  t�  d� wit� th� L� command�� i� i� no� automatic��  an�  �
i� th� situatio� i� ignored�� larg� area� o� dis� ca� b� tie� u� �
a� unproductiv� "dea� space".
:How to Use the Library Utility LU

    Lՠ ha� tw� basi� method� o� operation�� interactive�� an� �
paramete�  driven�� Us� o� th� interactiv� metho� i� probabl� th�  �
bes� wa� t� ge� t� kno� th� program�� becaus� th� effec� o� eac� �
actio� ca� b� immediatle� seen.

    T�  star� a� interactiv� librar� maintenanc� session�� jus� �
typ�  Lՠ  o�  th�  comman� lin� wit� n� parameter� afte� it�  �
Afte�  yo��  ar�  familia�  wit� th� program�� yo�� ca� specif� �
multipl� paramter� o� th� comman� lin� an� Lՠ wil� wor� wit� �
littl�  o� n� intervention�� Inpu� fro� dis� files�� à progra� �
"pipes"��  an�  th� XSU� facilit� ar� als� supporte� fo� mor� �
advance� applications.


    Al�  th�  method�  mak�  us� o� simila� syntax�� Comman� �
inpu�  take� tw� forms�� operator� (sometime� calle� tags�� o� �
options� an� operands.

    A�  operato�  i�  define�  a�  an� tw� characte� strin� �
wher�  th�  firs�  characte� i� � minu� sign�� Operator� tel� th�  �
progra� wha� t� do� Vali� operator� ar� -a� -d� -e� -l� -o� an� -�
r�� Anythin� els� wit� � simila� for� i� a� operato� too�� bu� a� �
invali� one.

    Operand�  ar�  everythin�  else� Normally� operand� ar� fil� �
name� whic� yo� wan� t� ad� to�� delet� from�� o� extrac� fro�  �  �
librar�  file��  o� ar� name� o� librar� file� t� b� opened� The� �
ma� contai� th� character� � o� �� i� whic� cas� the� ar� calle� �
ambiguou� operands� Som� vali� operand� are:

foo.bar       b:test.fil     z         *.*       comm?nd


    T�  refe� t� � fil� name� "-z� th� operan� woul� hav� t�  b�  �
entere� a� "-z.� wit� th� period�� sinc� otherwis� i� woul� b� �
mistake� a� a� invali� operator.

    Wha�  actio�  i� take� upo� th� fil� depend� upo� whic� �
operato�  mos�  recentl�  precede�  it��  I�  n� operato� wa� �
entered��  o�  a� invali� one� o� on� tha� take� n� operands� th� �
operan� wil� b� ignored.

    Whe� runnin� interactively�� L� prompt� fo� eac� operan� an�  �
operator��  on� pe� inpu� line�� Multipl� input� pe� lin� ar� no� �
allowe� usin� th� interactiv� method.


    Th�  promp�  yo��  wil�  se�  i� th� nam� o� th� curren� �
operato�  followe�  b�  �  ">� character�� fo� exampl� "-E>"�  �
Thi�  indicate� tha� th� -� operato� i� i� effect�� an� i� a� �
operan�  i�  entere� i� wil� b� interprete� a� th� nam� o� � �
membe�  fil�  t�  b�  Extracte�  fro�  th� library�� Whe� th� �
progra�  firs� start� up�� th� promp� i� "-?>� whic� mean� n� �
operato�  i�  currentl�  i�  effect��  I� thi� case�� th� onl� �
vali� inpu� i� a� operator� An� operan� wil� b� ignored.

:Summary of Operators

    The operators available under LU are:

         -A   Add Files to Library
         -D   Delete Files from Library
         -E   Extract Files from Library
         -L   List Library
         -O   Open a Library
         -R   Reorganize a Library

    Thes堠 operator� ar� discusse� i� mor� detai� i� th� �
following frames.



    -�   ad�  file�  t�  library��  -�  cause� th� promp� t� �
chang�  t�  -A� whic� wil� the� accep� a� operand� th� name� o�  �
file�  t�  b�  adde� t� th� ope� library�� (I� n� librar�� nam�  �
ha�  bee�  opene�  wit�  th�  -� operator�� th� defaul� librar�  �
LIBRARY.LBҠ  i�  alway�  use�  instead.��  Ambiguou� operand�  �
matc�  al�  dis�  file� whic� qualif� accordin� t� norma�  CP/�  �
wild-car�  conventions��  excep�  thos�  wit� � filetyp� o� .LBR� �
Explici� driv� specificatio� o� a� operan� cause�  tha� driv� t� �
b� searche� fo� th� file(s� instea� o� th� curren� drive.

    -�   delet� file� fro� library�� -� cause� th� promp� t� �
chang�  t�  -D�  whic�  accept� name� o� file� t� b� delete� fro�  �
th�  ope�  library��  Ambiguou�  name� matc� al� membe� file�  �
whic�  qualify��  Driv� specification� o� operand� ar� ignored�   �
sinc�   th�  librar�  member�  ar�  obviousl�  o� whicheve� driv� �
contain� th� ope� library.



    -�   extrac�  file�  fro� library�� -� cause� th� promp� t� �
chang� t� -E� whic� accept� name� o� librar� membe� file� t�   b�   �
extracte�  t�  norma�  free-standin�  CP/͠  files��  Ambiguou�  �
name� matc� al� membe� file� whic� qualify�� Driv� specificatio�  �
o� � membe� nam� cause� th� outpu� fil� t� b� place� o� th� �
specifie� driv� rathe� tha� th� curren� drive��  An��  existin�  �
fil�  wit�  th� sam� nam� wil� b� overwritte� unles�  i�  i� �
protecte� b� virtu� o� it� Read/Onl� fla� bi� bein� set.


    -�   lis�  curren� librar� map�� -� cause� th� director�� o�  �
th�  curren�  librar�  t�  b� liste� o� th� console�� Th� membe�  �
name�  ar�  displayed��  alon�  wit�  thei� index�� o� startin�  �
positio�  withi�  th�  library��  an� thei� siz� i� sectors�  �
Also�� informatio� i� displaye� abou� th� numbe� o� sector�  i�  �
th�  library�  an�  ho�  muc� space� i� use� o� unuse�  (wasted)�  �
Informatio�  i�  als� displaye� abou� th� numbe� o� entrie� i� �
th� directory�� an� ho� man� ar� active�� deleted��  o�  fre� fo� �
use�� Thi� help� determin� whethe� th� librar�  need�  t�  b� re-�
organize� t� fre� unuse� spac� an� delete�  entries��  Th�  �
operato�  -� expect� n� operands��� s� afte�  th� lis� i� �
displayed�� th� promp� change� bac� t� -?� fo� entr� o� anothe� �
operator.


    -�   ope�  � library�� -� cause� th� promp� t� chang� t� -O�  �
whic�  accept�  th� nam� o� � librar� fil� t� b� opene� fo�  us�  �
wit�  subsequen�  operators� I� anothe� librar� i� alread�  open�  �
i�  i� close� first�� I� th� ne� librar� doe� no�  exist�� i� i� �
create� wit� a� empt� directory�� Ambiguou� name�  ar�  no� �
allowed�� Driv� specificatio� i� allowed� Th� fil�  typ�  ma�  b� �
specified�� bu� default� t� .LB� whic� i� strongl� suggeste� a� �
th� fil� typ� fo� al� librar� files.

    Yo��  wil�  recal� tha� file� o� typ� -� (add�� operator�  �
Thi�  prevent�  librarie�  fro�  bein� accidentall�� adde� t� �
othe�  libraries��  o�  t� themselves�� � situatio� no� unlik� �
tryin�  t�  driv�  �  truc� u� it� ow� tailpipe�� I� fo� som� �
reaso�  yo� wan� t� ad� on� librar� t� another�� b� m� guest� bu�  �
yo��  wil�  hav�  t�  specif��  th�  nam�  withou� �� o� � �
character� whe� addin� it.


    -�   reorganiz�  library��  -� cause� th� currentl�� ope� �
librar�  t�  b�  reorganized� First� th� director� i� sorte� int�  �
alphabetica�  order�  an�  the� al� activ� member� ar� copie�  t�  �
�  wor�  librar��  whic� i� opene� o� th� curren� drive�� no� �
necessaril� th� driv� containin� th� ol� library�  Th�  use�  ma� �
specif�� � differen� numbe� o� entrie� fo� th� wor�  librar��  i�  �
i� i� necessar�� t� expan� o� compres� th� directory�� Th� �
director�� wil� alway� b� mad� larg� enoug� t� contai� al� th� �
activ� member� o� th� ol� library�� s� � siz� o�  ��  ma��  b�  �
specifie�  t� mak� th� director� a� smal� a� possible�� (Se� �
Specifyin� Director� Size� below.)

    Whe�  reorganizatio�  i�  complete��  th� ol� librar�� i� �
delete�  an�  th� wor� librar� i� rename� t� th� nam� o� th� ol�   �
library���   N  backu�  cop��  i�  retained���  Th堠  newl� �
reorganize�  librar��  remain�  ope�  fo� us� wit� subsequen� �
operations.


    Wheneve� th� progra� i� promptin� fo� a� operand�� anothe� �
operato�  ma�� b� entere� instea� t� chang� th� statu� o� th� �
prompt�� T� en� a� interactiv� session� ente� � blan� lin� a� th� �
prompt.


                   SPECIFYING DIRECTORY SIZE

    Wheneve�  a�  ol� librar� i� opened�� th� director� siz� i� �
displaye� a� follows:

Old library LIBRARY.LBR has 32 entries, 5 free.

    Thi�  mean� tha� � mor� member� ma� b� adde� befor� th� �
director��  become�  full��  Whe�  th�  director��  i� full�� -� �
become�  a�  invali�  operator��  an�  th�  librar��  mus�  b� �
reorganize� t� ad� an� mor� members.

    Whe�  � librar� i� create� fo� th� firs� time�� th� use� i� �
prompte� lik� this:

New library COMMAND.LBR. Allow how many entries?_


    An� numbe� fro� � t� 6553� i� valid�� Th� actua� maximu� i�  �
determine� b� th� amoun� o� fre� memor� availabl� o� th� syste� �
i� use�� Director�� siz� wil� b� rounde� u� t� th� nex� whol�  �
secto�  necessar�  t�  contai�  th� numbe� o� entrie� requested�  �
Thi�  numbe�  wil�  remai�  i�  effec� unti� th� librar�� i� �
reorganized� Sinc� th� director� itsel� count� a� a�  entry�  on� �
entr�� i� adde� t� whateve� i� entere� befor� th�  siz�  i�  �
calculated��  Therefor� jus� ente� th� maximu� numbe� o� membe� �
file� yo� wan� th� librar� t� b� capabl� o� holding.

    Th�  maximu� numbe� o� membe� file� i� als� constraine� b�  �
th�  amoun�  o�  availabl�  dis� space�� I� durin� a� ad� �
operatio�  th� dis� spac� run� out�� th� nam� i� no� adde� t� th�  �
directory�  I� � multipl� ad� i� i� progress� du� t� a� ambiguou�  �
operand�� th� remainin� qualifyin� file� ar� stil� adde�  i� �
possible� I� an� o� the� i� smal� enoug� t� fi� i� th�  remainin�  �
dis� space�� i� wil� b� added�� I� an� sector� wer�  writte�  b�  �
a�  ad� attempt�� an� the� neve� utilized�� the��  remai�  a�  �
unuse�  sectors� an� th� librar� shoul� b� reorganized.
:LU Command Line Forms

    Al� o� th� informatio� neede� fo� � maintenanc� ru� ma�� b� �
specifie� o� th� comman� line�� Th� operator� an� operand� ar�  �
entered�� separate� b� spaces�� afte� th� Lՠ command�� an� th� �
operation� wil� tak� plac� withou� consol� intervention�� excep�  �
i�  th�  cas�  wher�  th�  director�  siz� fo� � ne� librar�� i� �
requested� Th� synta� is:

LU <opr> [<opd> [<opd> ...]] [<opr> [<opd> ...]...

where square brackets indicate optional parameters, and:
    <opr> is any operator.
    <opd> is any operand.
    ...   indicates  that the preceding parameter may occur
multiple times.


    An��  name�  occurrin�  prio�  t� th� firs� operator�� o� �
followin�  a�  operato�  whic� doe� no� expec� operands�� ar� �
ignored.

:Advanced Features of LU

    Inpu�  fro�  BD� � "pipes� o� ordinar� sequentia� file� i�  �
als�  possible�� Th� filenam� i� specifie� o� th� comman� lin�  �
precede�  b� � "<� characte� an� n� intervenin� blank�  Example:

LU <CONSOL.DUP
    read� th� content� o� th� fil� CONSOL.DU� an� use� eac� lin�  �
o�  th�  fil�  a�  i�  i� ha� bee� type� a� th� norma� consol�   �
b�  th�  interactiv�  method��  I�  thi�  case�  n� operator�  o�  �
operand�  ma��  b� present��� Consol� outpu� ma�� als  b�  �
redirecte�  b�  specifyin�  a�  outpu� fil� o� th� comman�  lin�  �
afte�  th�  characte�  ">"��  T
hi�  applie� t� paramete�  drive� �
a� wel� a� interactiv� (includin� "piped"� input� Examples:

LU -O SPECIAL -A ZOT.COM >LOGFILE.OUT
    woul�  ad�  th� fil� zot.co� t� th� librar� special.lb� an�  �
writ�  th� consol� outpu� t� � fil� calle� logfile.out��  th�  �
locatio� o� th� outpu� nam� o� th� lin� doe� no� matte� an�  �
excep�  fo� turnin� o� redirecte� output�� i� i� ignore� b�� al� �
operators.

LU <BATCH.IN >B:RECORD.DOC
    woul�  tak� interactiv� command� fro� th� fil� batch.i� an�  �
writ�  consol�  outpu�  t�  � fil� calle� record.do� o� driv� B.

    Normally�  consol�  fil�  outpu�  i� als� echoe� o� th� rea�  �
console��  excep�  whe� inpu� i� als� redirected� a� i� th�  las� �
example� T� forc� visibl� consol� outpu� whe� bot� a�  inpu�  an�  �
outpu�  fil�  ar�  used��  th�  ">�� characte� precedin�  th�  �
outpu�  fil�  nam�  ma�  b� change� t� � "+� instead:

LU +RECORD.DOC <BATCH.IN
    woul�  hav�  th�  sam�  effec� a� th� previou� example� �
excep�  tha�  messag�  outpu�  woul�  als� b� visibl� o� th� �
console.

:CAUTIONS

   Th�  importanc�  o�  keepin�  backu�  copie� o� al� dis� �
files��  an�  especiall� libraries� canno� b� overemphasized�  B�  �
usin�  librar� files� th� use� i� expose� t� th� dreade� all-the-�
eggs-in-one-baske�  syndrome��  Tha� is� i� somethin� happen�  t� �
th� librar� file�� particularl� th� directory� i� ma�  b�  beyon�  �
th�  capabilitie�  o� eve� � CP/� wizar� t� restor� th� membe� �
files� Th� situatio� i� mad� particularl� stick� b� th� fac� tha� �
th� th� director� mus� b� update� i� plac� a� member� ar� adde� �
o� deleted.

    Precaution�  hav� bee� take� t� minimiz� thi� risk�� Fo� on�  �
thing��  th�  director�  i�  rea�  int�  memor� whe� th� librar�  �
i�  firs�  opened�  an�  i� onl� writte� bac� i� i� differ�  fro�  �
th�  cop�  o�  th�  dis�  whe� th� librar� i� closed�  Operation�  �
whic�  chang�  th� director� are�� adds� deletes�  an�  th�  sor�  �
operatio�  whic�  i�  don�  befor� reorganization��   I�   onl�   �
extract�   (o�   LRUNZ�  progra� executions��  ar� done��� th� �
director�� i� neve� rewritten�� an� th� .LB� fil� ma�� b� writ� �
protecte� i� desired.

    Fo�  anothe�  thing��  th�  entir�  empt��  director��  i� �
allocate�  an�  writte�  t� dis� whe� � ne�� librar�� i� firs� �
created�� Thi� insure� tha� ther� wil� alway� b� enoug� spac� o� �
dis� fo� th� numbe� o� director� entrie� requeste� a� th� tim�  �
o�  creation��  Th� dis� spac� ma� ru� ou� whil� addin� file� �
later� bu� ther� wil� alway� b� enoug� roo� o� dis� t� updat� th� �
director� onc� i� i� successfull� created.

    Th�  fac� tha� onl� th� memor� cop� o� th� director�� i� �
modifie�  unti� th� fil� i� close� ma� com� i� ver� hand� i� yo�  �
mistakenl��  delet�  � fil� an� recogniz� i� righ� away��  Fo�  �
example�  suppos�  yo�  mak�  th� mistak� o� typin� *.� afte� th� �
-D� prompt.


    Briefly��  you�  hear� sinks�� a� th� "Deleting:� messag� i�  �
displaye�  an�  al�  th� membe� name� zi� int� oblivion��  Don'�  �
panic�� Onl� th� memor� cop� o� th� director� ha� bee� modified�  �
Whe�  th�  -D� promp� returns�� d� no� hi� RETURN��  Instead�  �
abor� th� progra� wit� Control-C�� Thi� wil� cance� th� progra� �
withou� updatin� th� directory�� an� th� origina� member� wil� �
stil� b� present.

    Her�  i�  anothe�  caution�  Sinc� th� entir� director� (bu� �
no� membe� sectors�� mus� fi� i� memor� fo� � librar�� t� b� �
successfull� opened� i� i� possibl� tha� � hug� director� create�  �
o� � you� syste� wil� b� to� larg� t� fi� i� memor� i�  rea� o� �
anothe� syste� wil� les� memory�� Thi� shoul� no� b� � proble� �
wit� � librar� o� unde� � hundre� entries.


    T�  giv�  yo� a� ide� o� ho� muc� elbowroo� yo� hav� t� wor� �
with�� L� display� th� highes� memor� locatio� use� eac� tim�  i� �
terminates�� Thi� wil� var� dependin� o� th� larges� director�  �
use�  durin�  operation��  I� doe� no� includ� th� stack��  whic�  �
grow�  dow�  fro� hig� memory�� an� i� allowe� abou�  � thousan� �
byte� o� spac� fo� subroutin� linkage� an� temporar� wor� areas.

:LRUNZ Command

    Th�  LRUNڠ  comman� wa� create� fo� thos� o� u� wh� hav� �
lot�  o� comman� file� w� lik� t� kee� o� lin� al� th� time�  �
Wha� usuall� happen� i� tha� som� nic� littl� .CO� file� ar� ver�  �
smal�  programs�� bu� havin� � lo� o� the� o� dis� eat� u�  fil�  �
spac�  a�  a�  alarmin� rat� du� t� th� fixe� CP/� bloc�  size�  �
Pu� the� al� int� � librar� calle� COMMAND.LB� usin�  LU��  Yo� �
ca� the� ru� an� .CO� fil� directl� fro� th� librar� b� saying:

LRUNZ <followed by normal command line just like always>

    LRUN� i� derive� fro� Gary'� LRUN�  Stil� basicall� th� sam� �
program�� LRUNڠ add� ZCPR2-specifi� features�� i� particula� th� �
abilit� t� searc� fo� th� LB� fil� alon� th� Externa� Path��  I� �
thi� way�� LRUNڠ ca� b� use� a� a� Extende� Comman� Processor� �
and�� whe� invoked�� wil� searc� fo� COMMAND.LB� (o� such�� alon� �
th� pat� an� extrac� th� CO� fil� fro� th� firs� COMMAND.LBҠ i� �
finds.

    LRUNZ can be invoked by command line of the following forms:

         LRUNZ // or LRUNZ             <-- Print Help
         LRUNZ -lbrfile cmdline        <-- Run command from lbr
         LRUNZ cmdline                 <-- Run command from
                                            default COMMAND.LBR


    The full syntax of LRUNZ is:

LRUNZ [-<lbrfile>] <commember> [<parameters>]

Where:

    <lbrfile��  i�  th�  librar�  t� b� searched�� Th� squar� �
bracket�  aroun�  -<lbrfile�  indicat� i� i� optional�� Th� - �
characte� tell� LRUN� tha� wha� follow� i� � librar� name�� I� i� �
no� a� actua� par� o� th� name� Don'� leav� � spac� afte� th�  -� �
I� th� firs� paramete� doesn'� begi� wit� - the� th� defaul�  �
librar�  COMMAND.LB�  i�  used��  I� � driv� spe� i� given�  suc� �
a� B:�� the� onl� tha� driv� i� searche� fo� th� library�  I�  n�  �
driv�  spe� i� given� th� curren� driv� i� searche� first� an� i� �
n� librar� o� tha� nam� i� found�� th� A��  driv�  i�  searche�  �
befor� givin� up�� I� � name�� bu� n� typ� i� entered�� .LBҠ i� �
assumed.


    <commember��  i�  th�  nam� o� th� comman� t� b� run�� N� �
driv�  spe� i� use� here�� Th� typ� default� t� .CO� an� nee� no� �
b� entered.

    <parameters��  i�  � th� norma� (possibl� empty�� lis� o� �
parameter�  whic�  th�  .CO�  fil�  expect�  t�  fin� o� th� �
comman�  lin�  whe�  i�  i�  run�� Thi� lis� i� parse� t� th� �
require�  fil�  contro�  block� an� comman� lin� are� befor� �
executio�  begins��  s�  th�  progra�  wil� no� b� awar� tha� �
anythin�  cut�  i�  goin�  on�� (Thank� t� Ro� Ro� Fowle� fo� �
supplyin� th� cod� whic� make� thi� possible.)



                        LRUNZ EXAMPLES

LRUNZ ED FOO.BAR
    th�  fil�  ED.CO� i� searche� fo� i� COMMAND.LBҠ o� th� �
curren�  drive�  o� th� A� drive� I� found� ED.CO� i� loade� fro�  �
th�  library�  an�  FOO.BA�  i�  passe�  t�  i�  a�  � parameter.

LRUNZ -C:SPECIAL LU -O COMMAND -A A:*.COM
    th� fil� LU.CO͠ i� searche� fo� i� SPECIAL.LB� o� th� � �
drive��  I�  found��  LU.CO�  i�  loaded��  an� th� string� -O� �
COMMAND� -A� an� *.CO� ar� passe� t� i� a� parameters.

LRUNZ - -ZIP
    th� fil� -ZIP.CO� i� searche� fo� i� COMMAND.LBҠ o� th� �
curren� drive�� o� th� A� drive� I� found� -ZIP.CO� i� loade� an�  �
execute�  wit�  �  blan� paramete� list�� Sinc� -ZIP.CO͠ begin�  �
wit� � -�� th� extr� - followe� b� � spac� wa� neede� t� ac� a� � �
place-holde� fo� th� librar� name� Compar� with:


LRUNZ -ZIP
    th�  librar��  -ZIP.LB�  i� looke� for�� bu� nothin� els� �
happens� becaus� n� comman� wa� specified.

LRUNZ
    wit�  n�  parameter�  a�  all��  cause� � scree� o� hel� �
informatio� t� b� displaye� a� � memor� refresher.

:LDIRZ Command

    LDIR� print� � sorte� director� o� th� defaul� librar� file�  �
Th� printou� give� th� name� o� th� selecte� file� an� thei� �
sizes��  I� i� sorte� alphabeticall� b� fil� nam� an� type��  Tw� �
option� ar� permitted�� an� the� ar� th� nam� o� th� librar� fil� �
(ca� b� specifie� b� lbrfile�� i� whic� cas� lbrfile.LB� wil� b� �
accessed�� o� b�� � ful� filename.typ� an� th� fil� spe� (wil� �
card� ar� OK)�  Form� o� th� LDIR� comman� are:

         LDIRZ //            <-- Print Help
         LDIRZ               <-- All Files
         LDIRZ -lbrfile fn.t <-- Selected Files from Library
         LDIRZ filename.typ  <-- Selected Files

:LRUNZ as an Extended Command Processor Under ZCPR2

    I� th� reade� ca� recall�� comman� processin� unde� ZCPR� �
follows these steps:

         1.  ZCPR2 receives a command

         2��  ZCPR�� parse� th� command�� determine� i� i� i� � �
ZCPR2-resident command and executes it if it is

         3��  I� not�� ZCPR� searche� alon� th� command-searc� �
pat� fo� � CO� fil� whic� ha� th� sam� nam� a� th� command�� i� �
found, it is loaded and executed

         4��  I� thi� fails�� ZCPR� ma� eithe� searc� alon� th� �
command-searc� pat� o� g� directl� t� th� roo� o� th� pat� �
lookin� fo� a� Extende� Comman� Processor�� i� found�� i� i� �
loaded�� passe� th� comman� lin� a� th� use� presente� it�� an� �
executed; if not, an error message is given


    LRUNڠ i� a� excellen� candidat� fo� a� Extende� Comman� �
Processor��  I� th� comman� t� b� execute� i� TEST.COM�� an� i� �
take� tex� a� a� argument�� the� th� comman� lin� t� execut� �
TEST.COM under ZCPR2 would be:

         TEST text

I� TEST.CO͠ i� i� COMMAND.LB� (o� such)�� th� comman� lin� t� �
execute the same file using LRUNZ would be:

         LRUNZ TEST text

Thi� latte� comman� i� simulate� b� ZCPR� whe� i� fail� t� fin� �
th� CO͠ file��  Th� nam� o� th� Extende� Comman� Processo� �
(recommended�� i� CMDRUN�� and�� b� renamin� LRUN� t� CMDRUРo� �
makin� � cop� o� LRUN� a� CMDRUN�� LRUN� become� th� Extende� �
Comman� Processor.


    LDIRڠ fit� i� nicel� wit� thi� scheme��  COMMAND.LB� ca� b� �
kep� a� th� ROO� alon� wit� LRUN� an� LDIRZ�� an� LRUNZ�� whe� �
executed��� wil젠 g� t� th� ROOԠ lookin� fo� an䠠 findin� �
COMMAND.LBR�� a� whic� poin� i� extract� th� require� CO͠ file�  �
LDIRZ�� whe� executed�� wil� searc� alon� th� pat� fo� th� �
COMMAND.LB� file� and� hopefully� fin� i� a� th� ROO� an� extrac� �
the information (file names) requested by the user.

    Bot� LRUN� an� LDIR� ca� b� installe� b� GENIN� an� b� se� �
t� loo� fo� th� sam� COMMAND.LB� fil� a� wel� a� b� tol� wher� �
the path they are to follow is located.