MDMLIB User's Guide December, 1991 This manual contains information about MDMLIB, a set of miscellaneous utility routines. The library consists of routines for simple file I/O, interfacing to the $PARSE, $ASCTOID, and $TRNLNM system services, manipulating disk quota entries, and performing character conversions on strings. Revision/Update Information: This is a revised manual. Engineering Computing Services Rensselaer Polytechnic Institute Troy, New York ________________________ 05 December 1991 __________ Copyright ©1989, 1991 Rensselaer Polytechnic Institute. Permission is given to redistribute this software for non-commercial purposes provided that there is no charge for the distribution beyond handling and materials costs. Disclaimer: This software is provided "as is". Neither the author nor Rensselaer Polytechnic Institute makes any guarantee as to the suitability, usefulness, performance, or security of the software. _______________________________________________________ Contents _________________________________________________ PREFACE v _______________________________________________________ CHAPTER 1 INTRODUCTION 1-1 _________________________________________________ 1.1 USING MDMLIB 1-1 _________________________________________________ 1.2 CONTACTING THE AUTHOR 1-2 _______________________________________________________ Part I ROUTINE DESCRIPTIONS MDM_ASCTOID RTN-3 MDM_CLOSEF RTN-6 MDM_DQ_ADD RTN-8 MDM_DQ_CLOSE RTN-10 MDM_DQ_OPEN RTN-12 MDM_DQ_READ RTN-14 MDM_DQ_REMOVE RTN-17 MDM_DQ_SET RTN-19 MDM_MKDATE RTN-21 MDM_OPENF RTN-24 MDM_PARSE RTN-27 MDM_READF RTN-30 MDM_RWNDF RTN-32 MDM_STRANS RTN-34 MDM_SYS_TRNLNM RTN-36 MDM_WRITEF RTN-39 iii _______________________________________________________ Preface MDMLIB is a library of routines used by various ECS utilities. They were written mainly to simplify access to existing VMS system services. The_routines_can_be_grouped_as_follows:________________ ______________Sequential_File_I/O_Routines_____________ MDM_OPENF Open a file MDM_READF Read a record from file MDM_WRITEF Write a record to file MDM_RWNDF Rewind to beginning of file MDM_CLOSEF____________Clsoe_file_______________________ __________________Disk_Quota_Routines__________________ MDM_DQ_OPEN Begin disk quota operations MDM_DQ_ADD Add quota entry to quota file MDM_DQ_READ Read one or more quota entries MDM_DQ_SET Modify an existing quota entry MDM_DQ_REMOVE Remove a quota entry MDM_DQ_CLOSE__________End_disk_quota_operations________ _________________Miscellaneous_Routines________________ MDM_ASCTOID Convert UIC or identifier string to numeric value MDM_MKDATE Create an RFC822-compliant date/time string MDM_PARSE Simplified $PARSE interface MDM_STRANS ASCII/EBCDIC/negative-ASCII character translation MDM_SYS_TRNLNM Logical name translation á la LIB$SYS_TRNLOG v _______________________________________________________ 1 Introduction MDMLIB is a set of miscellaneous routines used in various ECS projects. The library includes a set of RMS interface routines for using simple sequential files, a routine to make date/time strings that are compliant with RFC 822, routines that interface with the $TRNLNM, $ASCTOID, and $PARSE system services, a routine for performing character conversions, and routines for manipulating disk quotas. Most of these routines are very similar to routines that already exist on VAX/VMS, or perform tasks that can be accomplished through high-level language constructs (such as the file I/O routines). The MDMLIB routines were developed generally because the extant routines and I/O constructs did not provide exactly the services required. __________________________________________________________________ 1.1 Using MDMLIB The MDMLIB routines be callable from any VAX language; just link with library MDMLIB.OLB. A library of PL/I inserts (PLIMDM.TLB) and a BLISS REQUIRE file (BLISSMDM.R32) accompany the library for use of the routines from those languages. The PL/I text library also includes some preprocessor declarations and procedures to assist in using VMS system services. 1-1 Introduction __________________________________________________________________ 1.2 Contacting the Author Comments, suggestions, and questions about MDMLIB can be directed to the author via electronic mail at one of the following addresses: Internet: madison@vms.ecs.rpi.edu BITNET: MADISON@RPIECSVX 1-2 _______________________________________________________ Part I Routine Descriptions This part describes the each of the MDMLIB routines. MDM_ASCTOID _______________________________________________________ MDM_ASCTOID-Translate Identifier Name or UIC to Identifier MDM_ASCTOID translates an ASCII identifier or UIC specification into an identifier value. _______________________________________________________ FORMAT MDM_ASCTOID ascid, ident _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS ascid VMS Usage: char_string type: character string access: read only mechanism: by descriptor ASCII representation of UIC or identifier. ident VMS Usage: uic_code type: longword (unsigned) access: write only mechanism: by value Identifier value of UIC or identifier name. RTN-3 MDM_ASCTOID _______________________________________________________ DESCRIPTION This routine uses LIB$TPARSE and $ASCTOID to parse and translate an identifier or UIC specification from ASCII into the appropriate identifier value. A UIC specification or identifier may take any of the following forms: [g,m] Group and member specified as octal numbers [alphag,m] Group as alphanumeric identifier; member in octal [alphag,alpham] Group and member as alphanumeric identifiers [alpham] Alphnumeric identifier for full UIC [octal,*] Wildcard for entire group [alphag,*] Wildcard for entire group [*,*] Wildcard for all users in all groups alphaid Plain, ordinary alphanumeric identifier %Xhexnum Identifier value in hexadecimal These are the forms generally recognized by DCL and its utilities. RTN-4 MDM_ASCTOID _______________________________________________________ CONDITION VALUES RETURNED SS$_NORMAL Normal successful completion. Other status values from LIB$TPARSE, LIB$ANALYZE_SDESC, and $ASCTOID are possible. RTN-5 MDM_CLOSEF _______________________________________________________ MDM_CLOSEF-Close a file MDM_CLOSEF closes a file that was opened with MDM_ OPENF. _______________________________________________________ FORMAT MDM_CLOSEF unit _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS handle VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by value Handle of open file, as returned by MDM_OPENF. _______________________________________________________ DESCRIPTION This routine closes a file that was opened with MDM_ OPENF. Warning about handle: Handles are for internal use by MDMLIB routines only, and should not be manipulated by a user program. RTN-6 MDM_CLOSEF _______________________________________________________ CONDITION VALUES RETURNED RMS$_NORMAL indicates normal successful completion. RTN-7 MDM_DQ_ADD _______________________________________________________ MDM_DQ_ADD-Add a disk quota entry MDM_DQ_ADD adds a disk quota entry to a disk volume. _______________________________________________________ FORMAT MDM_DQ_ADD dqhandle, ident, permq, overdr _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS dqhandle VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by reference Handle created with MDM_DQ_OPEN. ident VMS Usage: uic_code type: longword (unsigned) access: read only mechanism: by reference UIC code or identifier value for which the disk quota entry is to be added. permq VMS Usage: longword_unsigned type: longword (unsigned) access: read only RTN-8 MDM_DQ_ADD mechanism: by reference Permanent disk quota value to be entered. overdr VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by reference Overdraft disk quota value to be entered. _______________________________________________________ DESCRIPTION This routine adds a new entry in the disk quota file for the specified UIC or identifier value. _______________________________________________________ CONDITION VALUES RETURNED SS$_NORMAL Normal successful completion. Other status value from $QIO or I/O status returns from the ACP-QIO interface driver are possible. RTN-9 MDM_DQ_CLOSE _______________________________________________________ MDM_DQ_CLOSE-Close disk channel MDM_DQ_CLOSE closes a channel opened with MDM_DQ_OPEN. _______________________________________________________ FORMAT MDM_DQ_CLOSE dqhandle _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS dqhandle VMS Usage: longword_unsigned type: longword (unsigned) access: modify mechanism: by reference Handle created by MDM_DQ_OPEN identifying channel to be closed. _______________________________________________________ DESCRIPTION MDM_DQ_CLOSE closes the channel opened with MDM_DQ_ OPEN and deallocates the memory used for the disk quota structures. RTN-10 MDM_DQ_CLOSE _______________________________________________________ CONDITION VALUES RETURNED SS$_NORMAL Normal successful completion. RTN-11 MDM_DQ_OPEN _______________________________________________________ MDM_DQ_OPEN-Open channel to disk MDM_DQ_OPEN opens a channel to a disk volume for disk quota operations. _______________________________________________________ FORMAT MDM_DQ_OPEN devnam, dqhandle _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS devnam VMS Usage: device_name type: character string access: read only mechanism: by descriptor Device name of disk device to be opened. dqhandle VMS Usage: longword_unsigned type: longword (unsigned) access: write only mechanism: by reference Handle used to refer to disk for other MDM_DQ operations. RTN-12 MDM_DQ_OPEN _______________________________________________________ DESCRIPTION MDM_DQ_OPEN assigns a channel to the specified disk voolume and allocates the structures needed for subsequent disk quota operations. Note that this routine does not attempt to determine whether disk quotas are enabled on the volume. Note that you must be suitably privileged to perform disk quota manipulations on a volume. _______________________________________________________ CONDITION VALUES RETURNED SS$_NORMAL Normal successful completion. Other status values from LIB$GET_VM and $ASSIGN are possible. RTN-13 MDM_DQ_READ _______________________________________________________ MDM_DQ_READ-Read a disk quota entry MDM_DQ_READ reads a disk quota and usage entry from the quota file. _______________________________________________________ FORMAT MDM_DQ_READ dqhandle, ident, permq, overdr, usage [,context, actident] _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS dqhandle VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by reference Handle for disk channel, as returned by MDM_DQ_OPEN. ident VMS Usage: uic_code type: longword (unsigned) access: read only mechanism: by reference UIC or identifier value for the entry to be read. RTN-14 MDM_DQ_READ permq VMS Usage: longword_unsigned type: longword (unsigned) access: write only mechanism: by reference Permanent quota value from disk quota entry. overdr VMS Usage: longword_unsigned type: longword (unsigned) access: write only mechanism: by reference Overdraft value from disk quota entry. usage VMS Usage: longword_unsigned type: longword (unsigned) access: write only mechanism: by reference Disk usage value from disk quota entry. context VMS Usage: longword_unsigned type: longword (unsigned) access: modify mechanism: by reference Context information for wildcard searches of quota file. actident VMS Usage: uic_code type: longword (unsigned) access: write only mechanism: by reference UIC or identifier value read from disk quota entry during wildcard search. RTN-15 MDM_DQ_READ _______________________________________________________ DESCRIPTION This routine reads the current quota, overdraft, and usage values for the specified UIC or identifier value. With the use of the context and actident arguments, this routine can be called repeatedly for a wildcard search of the quota file. Two types of wildcard searching can be performed. The entries for all users in a particular UIC group can be obtained by specifying UIC$K_WILD_MEMBER for the member portion of the UIC. The entries for all users in all groups can be obtained by specifying UIC$K_ WILD_GROUP for the group portion of the UIC and UIC$K_ WILD_MEMBER for the member portion of the UIC. To perform a wildcard search, initialize the context variable to zero before the first call to MDM_DQ_READ. The actual UIC or identifier read from the quota file is returned in actident. Do not alter the context value after the initial read, and continue reading until an error code is returned indicating no further entries. _______________________________________________________ CONDITION VALUES RETURNED SS$_NORMAL Normal successful completion. SS$_BADPARAM Wildcard UIC specified without context and actident arguments. Other status values from $QIO and the QIO-ACP driver are also possible. RTN-16 MDM_DQ_REMOVE _______________________________________________________ MDM_DQ_REMOVE-Remove a disk quota entry MDM_DQ_REMOVE removes a disk quota entry from the quota file. _______________________________________________________ FORMAT MDM_DQ_REMOVE dqhandle, ident _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS dqhandle VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by reference Handle created with MDM_DQ_OPEN. ident VMS Usage: uic_code type: longword (unsigned) access: read only mechanism: by reference UIC code or identifier value for which the disk quota entry is to be removed. RTN-17 MDM_DQ_REMOVE _______________________________________________________ DESCRIPTION This routine removes disk quota entries. Note that the entry is removed regardless of whether the usage for the specified identifier is zero or not. _______________________________________________________ CONDITION VALUES RETURNED SS$_NORMAL Normal successful completion. Other status values from $QIO or the QIO-ACP driver are possible. RTN-18 MDM_DQ_SET _______________________________________________________ MDM_DQ_SET-Modify a disk quota entry MDM_DQ_SET sets a new quota and/or overdraft value for one UIC or identifier in the quota file. _______________________________________________________ FORMAT MDM_DQ_SET dqhandle, ident, [permq], [overdr] _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS dqhandle VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by reference Handle created with MDM_DQ_OPEN. ident VMS Usage: uic_code type: longword (unsigned) access: read only mechanism: by reference UIC code or identifier value for which the disk quota entry is to be modified. RTN-19 MDM_DQ_SET permq VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by reference Permanent disk quota value to be entered. If omitted, the permanent quota remains unchanged. overdr VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by reference Overdraft disk quota value to be entered. If omitted, the overdraft value remains unchanged. _______________________________________________________ DESCRIPTION This routine modifies a disk quota entry for a specific UIC or identifier value. You can change either the permanent quota or overdraft value or both; if you omit a value it remains unchanged. Use MDM_ DQ_REMOVE to remove a disk quota entry from the quota file. _______________________________________________________ CONDITION VALUES RETURNED SS$_NORMAL Normal successful completion. Other status values from $QIO or the ACP-QIO driver are possible. RTN-20 MDM_MKDATE _______________________________________________________ MDM_MKDATE-make RFC822 date string MDM_MKDATE constructs an RFC822-compliant date/time string from a VMS date/time stamp. _______________________________________________________ FORMAT MDM_MKDATE [fs-date], fmt-date [,fd-len] _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS fs-date VMS Usage: date_time type: quadword (unsigned) access: read only mechanism: by reference A VMS absolute date/time stamp. If omitted, the current system date/time is used. fmt-date VMS Usage: char_string type: character string access: write only mechanism: by descriptor Character string into which the formatted date is written. RTN-21 MDM_MKDATE fd-len VMS Usage: word_unsigned type: word (unsigned) access: write only mechanism: by reference Length of character string stored in fmt-date. _______________________________________________________ DESCRIPTION This routine constructs a date/time string that complies with the Internet RFC822 date/time specification. The format of the string is: Dow, dd Mmm yy hh:mm:ss zone Where Dow is a three-letter abbreviation of the day of the week, dd is the day of the month, Mmm is a three-letter abbreviation for the name of the month, yy is the year (last two digits only), hh:mm:ss is the time of day (using 24-hour notation), and zone is the time-zone specification. This routine assumes operation in the Eastern time zone under the current daylight savings time schedule. You can override this default by defining one of two logical names. For systems observing US standard daylight savings time, defining the logical MDM_ TZ_PREFIX to be one of E, C, M, or P (for Eastern, Central, Mountain, or Pacific) will cause that letter to be prepended to either ST or DT, as appropriate. To specify your own time zone string, define the logical name MDM_TIMEZONE to be the desired time zone specification (such as GMT or "-0500"); it will be used without modification. Those logical names must be defined in the system logical name table to have any effect. RTN-22 MDM_MKDATE _______________________________________________________ CONDITION VALUES RETURNED SS$_NORMAL indicates normal successful completion. Status values from LIB$DAY_OF_WEEK and LIB$SYS_FAO are also possible. RTN-23 MDM_OPENF _______________________________________________________ MDM_OPENF-Open a file MDM_OPENF opens a file for sequential access. _______________________________________________________ FORMAT MDM_OPENF key, fspec [,handle] [,defspec] [,resspec] _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS key VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by value Function code indicating operation to be performed. Key may have one of the following values: _______________________________________________________ Value_________________Meaning__________________________ MDM__EXISTS Test only for file's existence. MDM__READ Open file for reading. MDM__WRITE Open file for writing. MDM__APPEND___________Open_file_for_appending._________ RTN-24 MDM_OPENF If the key value may be ORed with the modifier MDM_ M_FID, which indicates that the fspec argument is a descriptor pointing to a VMS file ID. MDM_M_FID is not valid with the MDM__EXISTS key. fspec VMS Usage: char_string type: character string access: read only mechanism: by descriptor File specification of file to be opened. If MDM_M_ FID is specified, the descriptor should point to a 28-byte structure containing the 16-byte device name, 6-byte file ID, and 6-byte directory ID of the file to be opened (this is the 28 consecutive bytes of a NAM block starting with the NAM$T_DVI field). handle VMS Usage: longword_unsigned type: longword (unsigned) access: write only mechanism: by reference "Handle" assigned to opened file, used to identify the file for subsequent file operations. This argument is optional only when key has the value MDM__EXISTS. defspec VMS Usage: char_string type: character string access: read only mechanism: by descriptor Default file specification to be used when opening the file. If omitteed, a default file specification of .DAT is used. resspec VMS Usage: char_string type: character string access: write only mechanism: by descriptor RTN-25 MDM_OPENF If specified, the RMS resultant file specification is copied to this string. _______________________________________________________ DESCRIPTION MDM_OPENF provides simplified access to RMS for use with sequential disk files. Certain assumptions are made by this routine: o "Opening a file for writing" means creating a new file that is opened for writing. "Opening a file for appending" means opening an existing file for writing and positioning to the end of file before the first write operation. Both of these types of open operations use exclusive access to the file. o Read-only operations allow for multiple readers. o Files created by this routine have variable-length records and carriage-return carriage control (i.e. typical VMS sequential text file). The handle is actually the address of a control structure used internally by the file I/O routines that should not be manipulated by user programs. _______________________________________________________ CONDITION VALUES RETURNED RMS$_NORMAL Normal successful completion. MDM__INVFUNC Invalid value for key. MDM__INVFSPEC Invalid file specification given for fspec, defspec, or resspec. Error codes from $OPEN, $CREATE, $CONNECT, LIB$GET_VM, and LIB$ANALYZE_SDESC are also possible. RTN-26 MDM_PARSE _______________________________________________________ MDM_PARSE-Interface to $PARSE MDM_PARSE is a simplified interface to the RMS $PARSE service. _______________________________________________________ FORMAT MDM_PARSE keymask, fspec, [defspec,] result [,reslen] _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS keymask VMS Usage: mask_longword type: longword (unsigned) access: read only mechanism: by reference A mask indicating actions to be performed. Any combination of the following values may be used: _______________________________________________________ Value_________________Meaning__________________________ MDM_M_NODE Return node specification. MDM_M_DEV Return device specification. MDM_M_DIR Return directory specification. RTN-27 MDM_PARSE _______________________________________________________ Value_________________Meaning__________________________ MDM_M_NAME Return file name. MDM_M_TYPE Return file type. MDM_M_VER Return version number. MDM_M_ALL Return all parts of file specification. MDM_M_SYNCHK Perform syntax check only. MDM_M_PWD Leave password in DECnet access string unaltered. MDM_M_NOCONCEAL Fully expand concealed device ______________________and_root_specifications._________ fspec VMS Usage: char_string type: character string access: read only mechanism: by descriptor File specification to be parsed. defspec VMS Usage: char_string type: character string access: read only mechanism: by descriptor Default file specification to be used while parsing. result VMS Usage: char_string type: character string access: write only mechanism: by descriptor RTN-28 MDM_PARSE Result of the parsing operation. The result includes only those parts of the file specification specified by keymask. reslen VMS Usage: word_unsigned type: word (unsigned) access: write only mechanism: by reference Length of string written to result. _______________________________________________________ DESCRIPTION This routine provides a fairly simple interface to the $PARSE RMS service. Specify which parts of the file specification you want returned, and those parts, written in normal RMS order with appropriate punctuation, are returned in result. The SYNCHK, PWD, and NOCONCEAL options are passed along to $PARSE. Refer to the RMS manual for more information. _______________________________________________________ CONDITION VALUES RETURNED RMS$_NORMAL Normal successful completion. Other status values from $PARSE, LIB$GET_VM, LIB$SCOPY_DXDX, and LIB$ANALYZE_SDESC are possible. RTN-29 MDM_READF _______________________________________________________ MDM_READF-Read a record MDM_READF reads a record from a file opened by MDM_ OPENF. _______________________________________________________ FORMAT MDM_READF handle, recbuf [,len] _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS handle VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by value Handle of open file, as returned by MDM_OPENF. recbuf VMS Usage: char_string type: character string access: write only mechanism: by descriptor Character string into which the record read from the file is stored. RTN-30 MDM_READF len VMS Usage: word_unsigned type: word (unsigned) access: write only mechanism: by reference Length of record read from file. _______________________________________________________ DESCRIPTION MDM_READF reads in one record from a file opened by MDM_OPENF. The RTL character string routines are used to copy the record into recbuf, so any type of character string descriptor that the RTL handles can be used. _______________________________________________________ CONDITION VALUES RETURNED RMS$_NORMAL Normal successful completion. RMS$_EOF Attempt was made to read beyond end of file. Other status values from $GET are also possible. RTN-31 MDM_RWNDF _______________________________________________________ MDM_RWNDF-Rewind file MDM_RWNDF rewinds a file that was opened with MDM_ OPENF. _______________________________________________________ FORMAT MDM_RWNDF handle _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS handle VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by value _______________________________________________________ DESCRIPTION This routine simply issues a $REWIND RMS service on the file. RTN-32 MDM_RWNDF _______________________________________________________ CONDITION VALUES RETURNED RMS$_NORMAL Normal successful completion. Other status values from $REWIND are also possible. RTN-33 MDM_STRANS _______________________________________________________ MDM_STRANS-Interface to MOVTC instruction MDM_STRANS translates character strings using the MOVTC instruction. _______________________________________________________ FORMAT MDM_STRANS func, srcstr, dststr _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS func VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by value Selects the translation function to be performed. Func can have one of the following values: _______________________________________________________ Value_________________Meaning__________________________ MDM__ASCEBC ASCII to EBCDIC translation. MDM__EBCASC EBCDIC to ASCII translation. MDM__ASCPRI ASCII to Prime-ASCII translation. RTN-34 MDM_STRANS _______________________________________________________ Value_________________Meaning__________________________ MDM__PRIASC Prime-ASCII to ASCII ______________________translation._____________________ srcstr VMS Usage: char_string type: character string access: read only mechanism: by descriptor String to be translated. dststr VMS Usage: char_string type: character string access: write only mechanism: by descriptor Result of translation. _______________________________________________________ DESCRIPTION This routine translates between ASCII and EBCDIC as well as between ASCII and "Prime ASCII" (also called "negative ASCII"), which is 7-bit ASCII codes with the 8th bit set in each byte. _______________________________________________________ CONDITION VALUES RETURNED SS$_NORMAL Normal successful completion. Other status values from STR$GET1_DX, LIB$ANALYZE_SDESC, and LIB$SCOPY_DXDX are possible. RTN-35 MDM_SYS_TRNLNM _______________________________________________________ MDM_SYS_TRNLNM-Interface to $TRNLNM service MDM_SYS_TRNLNM translates logical names using $TRNLNM. _______________________________________________________ FORMAT MDM_SYS_TRNLNM lognam, [attr], [tblmask], [acmode], eqvnam [,eqvlen] _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS lognam VMS Usage: logical_name type: character string access: read only mechanism: by descriptor Logical name to be translated. attr VMS Usage: mask_longword type: longword (unsigned) access: read only mechanism: by reference Attributes controlling the logical name search, as used by $TRNLNM. RTN-36 MDM_SYS_TRNLNM tblmask VMS Usage: mask_longword type: longword (unsigned) access: read only mechanism: by reference Mask specifying which tables should be searched. _______________________________________________________ Bit Mask number___value_____Meaning_____________________________ 3 8 Process logical name table 2 4 Job logical name table 1 2 Group logical name table __0________1_______System_logical_name_table___________ If omitted, the logical name tables that defined by logical name LNM$FILE_DEV (which is either in table LNM$PROCESS_DIRECTORY or LNM$SYSTEM_DIRECTORY) are searched. acmode VMS Usage: access_mode type: byte (unsigned) access: read only mechanism: by reference Access mode to be used in the translation, as used by $TRNLNM. eqvnam VMS Usage: char_string type: character string access: write only mechanism: by descriptor String into which the equivalence name is written if found. RTN-37 MDM_SYS_TRNLNM eqvlen VMS Usage: word_unsigned type: word (unsigned) access: write only mechanism: by reference Length of equivalence name. _______________________________________________________ DESCRIPTION This routine uses the $TRNLNM system service to translate a logical name. Only the tables specified by the tblmask argument are searched. The tables are searched in the following order: process, job, group, system. Only the first equivalence name can be retrieved with this routine-search lists cannot. See the description of the $TRNLNM system service for an explanation of the attr and acmode arguments. _______________________________________________________ CONDITION VALUES RETURNED SS$_NORMAL Normal successful completion. Other status values from LIB$SCOPY_DXDX, LIB$SCOPY_R_ DX, and $TRNLNM are possible. RTN-38 MDM_WRITEF _______________________________________________________ MDM_WRITEF-Write a record to a file MDM_WRITEF writes a record to a file opened by MDM_ OPENF. _______________________________________________________ FORMAT MDM_WRITEF handle, recbuf _______________________________________________________ RETURNS VMS Usage: cond_value type: longword (unsigned) access: write only mechanism: by value _______________________________________________________ ARGUMENTS handle VMS Usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by value Handle of file, as returned by MDM_OPENF. recbuf VMS Usage: char_string type: character string access: read only mechanism: by descriptor Character string containing data to be written to the file. RTN-39 MDM_WRITEF _______________________________________________________ DESCRIPTION This routine uses the $PUT RMS service to write the record to the file. The file must have been opened for writing (or appending) with MDM_OPENF. _______________________________________________________ CONDITION VALUES RETURNED RMS$_NORMAL Normal successful completion. Other status values from LIB$ANALYZE_SDESC and $PUT are possible. RTN-40