From:	CSBVAX::MRGATE!Info-VAX-RELAY@KL.SRI.COM@SMTP 23-JUN-1988 19:29
To:	ARISIA::EVERHART
Subj:	Distribution of PREFIX_SEARCHLIST.COM


Received: from LBL.Gov by KL.SRI.COM with TCP; Mon, 20 Jun 88 06:40:45 PDT
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	Mon, 20 Jun 88 06:34:48 PDT
Date:    Mon, 20 Jun 88 06:34:48 PDT
From:     nagy%warner.hepnet@LBL.Gov (Frank J. Nagy, VAX Wizard & Guru)
Message-Id: <880620063448.26600941@LBL.Gov>
Subject: Distribution of PREFIX_SEARCHLIST.COM
To:       Info-VAX@kl.sri.com
X-ST-Vmsmail-To: INFO_VAX

Below is PREFIX_SEARCHLIST.COM, a command procedure I wrote to add an
additional entry as a "prefix" to an existing search list logical name.
I originally wrote this (and use it in my LOGIN.COM) to have LaTeX search
my personal set of macro and style files.  After initializing LaTeX by
calling the system-wide procedure for doing so, I include the call:

   @MY_COM:PREFIX_SEARCHLIST  TEX$INPUTS  SYS$LOGIN_DEVICE:[NAGY.TEX]

to add my own TeX files area to the search list.  A question from a
user prompted me to share this with everyone.


= Frank J. Nagy   "VAX Guru & Wizard"
= Fermilab Research Division EED/Controls
= HEPNET: WARNER::NAGY (43198::NAGY) or FNAL::NAGY (43009::NAGY)
= BitNet: NAGY@FNAL
= USnail: Fermilab POB 500 MS/220 Batavia, IL 60510


........................ Cut between dotted lines and save ......................
$!..............................................................................
$! VAX/VMS archive file created by VMS_SHAR V-5.01 01-Oct-1987
$! which was written by Michael Bednarek (U3369429@ucsvc.dn.mu.oz.au)
$! To unpack, simply save and execute (@) this file.
$!
$! This archive was created by NAGY
$! on Monday 20-JUN-1988 08:35:02.96
$!
$! It contains the following 1 file:
$! PREFIX_SEARCHLIST.COM
$!==============================================================================
$ Set Symbol/Scope=(NoLocal,NoGlobal)
$ Version=F$GetSYI("VERSION") ! See what VMS version we have here:
$ If Version.ges."V4.4" then goto Version_OK
$ Write SYS$Output "Sorry, you are running VMS ",Version, -
                ", but this procedure requires V4.4 or higher."
$ Exit 44
$Version_OK: CR[0,8]=13
$ Pass_or_Failed="failed!,passed."
$ Goto Start
$Convert_File:
$ Read/Time_Out=0/Error=No_Error1/Prompt="creating ''File_is'" SYS$Command ddd
$No_Error1: Define/User_Mode SYS$Output NL:
$ Edit/TPU/NoSection/NoDisplay/Command=SYS$Input/Output='File_is' -
        VMS_SHAR_DUMMY.DUMMY
f:=Get_Info(Command_Line,"File_Name");b:=Create_Buffer("",f);
o:=Get_Info(Command_Line,"Output_File");Set(Output_File,b,o);
Position(Beginning_of(b));Loop x:=Erase_Character(1);Loop ExitIf x<>"V";
Move_Vertical(1);x:=Erase_Character(1);Append_Line;
Move_Horizontal(-Current_Offset);EndLoop;Move_Vertical(1);
ExitIf Mark(None)=End_of(b) EndLoop;Position(Beginning_of(b));Loop
x:=Search("`",Forward,Exact);ExitIf x=0;Position(x);Erase_Character(1);
If Current_Character='`' then Move_Horizontal(1);else
Copy_Text(ASCII(INT(Erase_Character(3))));EndIf;EndLoop;Exit;
$ Delete VMS_SHAR_DUMMY.DUMMY;*
$ Checksum 'File_is
$ Success=F$Element(Check_Sum_is.eq.CHECKSUM$CHECKSUM,",",Pass_or_Failed)+CR
$ Read/Time_Out=0/Error=No_Error2/Prompt=" CHECKSUM ''Success'" SYS$Command ddd
$No_Error2: Return
$Start:
$ File_is="PREFIX_SEARCHLIST.COM"
$ Check_Sum_is=2014673880
$ Copy SYS$Input VMS_SHAR_DUMMY.DUMMY
X$ old_verify = 'F$VERIFY(0)'
X$!.. PREFIX_SEARCHLIST.COM`009Add a prefix item to a logical name search list
X$ string = p2
X$ IF F$TRNLNM( p1) .EQS. "" THEN $ GOTO PSL_DEFINE
X$ max = F$TRNLNM( p1,,,,, "MAX_INDEX")
X$ n = 0
X$PSL_LOOP:
X$ string = string + "," + F$TRNLNM( p1,, n)
X$ n = n + 1
X$ IF n .LE. max THEN $ GOTO PSL_LOOP
X$PSL_DEFINE:
X$ DEFINE /NOLOG`009'p1'`009'string'
X$ EXIT`009F$VERIFY(old_verify).OR.1
X$!=============================================================================
X$!+ PREFIX_SEARCHLIST
X$! Add an item as the new first entry in the search list given by a logical
X$! name.  The new item *does not* replace the existing first item and instead
X$! pushes the existing items back one position in the last (the new item is
X$! added as a prefix to the list).
X$!
X$!`009@MY_COM:PREFIX_SEARCHLIST  logical-name  new-first-entry
X$!-
X$!=============================================================================
X$! Modification History:
X$!  23-Oct-87`009FJN`009Created from LOGIN.COM
$ GoSub Convert_File
$ Exit
