Difference between revisions of "SET FILE"
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* [https://.com//OpenVMS DCL Dictionary]
* [://vmssoftware.com/docs/.pdf OpenVMS Guide to System Security]
* [://.com//.I/O User's Reference Manual]
Revision as of 10:12, 29 September 2020
SET FILE is a DCL command that modifies file characteristics.
SET FILE filespec
- /ATTRIBUTE=(file-attribute[,...]) sets the attributes associated with a file. The following table lists possible keywords and the relationship to both ACP-QIO and OpenVMS RMS File attributes:
|Keyword||ACP_QIO File Attribute||OpenVMS RMS File Attribute||Description|
|ATTDATE=date||FAT$C_ATTDATE||XAB$Q_ATT||attribute modification date|
|ACCDATE=date||FAT$C_ACCDATE||XAB$Q_ACC||file access date|
|DEQ:value||FAT$W_DEFEXT=word||FAB$W_DEQ=word||default extend quantity|
|EBK:value||FAT$L_EFBLK=longword||XAB$L_EBK=longword||end of file VBN|
|FFB:value||FAT$W_FFBYTE=word||XAB$W_FFB=word||first free byte in FAT$L_EFBLK|
|FSZ:value||FAT$B_VFCSIZE=byte||FAB$B_FSZ=byte||size in bytes of fixed-length control for VFC records|
|GBC:value||FAT$W_GBC=word||FAB$W_GBC=word||global buffer count|
|HBK:value||FAT$L_HIBLK=longword||XAB$L_HBK=longword||highest allocated VBN|
|MODDATE=date||FAT$C_MODDATE||XAB$Q_MOD||last time data was modified|
|MRS:value||FAT$W_MAXREC=word||FAB$W_MRS=word||maximum record size|
|ORG:IDX||FAT$V_FILEORG=FAT$C_INDEXED||FAB$B_ORG=FAB$C_IDX||indicates that the file is indexed|
|ORG:REL||FAT$V_FILEORG=FAT$C_RELATIVE||FAB$B_ORG=FAB$C_REL||indicates that the file is relative|
|ORG:SEQ||FAT$V_FILEORG=FAT$C_SEQUENTIAL||FAB$B_ORG=FAB$C_SEQ||indicates that the file is sequential|
|RAT:BLK||FAT$B_RATTRIB=FAT$M_NOSPAN||FAB$B_RAT=FAB$M_BLK||indicates that the file does not have spanned records|
|RAT:CR||FAT$B_RATTRIB=FAT$M_IMPLIEDCC||FAB$B_RAT=FAB$M_CR||indicates that the file has implied carriage control|
|RAT:FTN||FAT$B_RATTRIB=FAT$M_FORTRANCC||FAB$B_RAT=FAB$M_FTN||indicates that the file has Fortran carriage control|
|RAT:NONE||FAT$B_RATTRIB=0||FAB$B_RAT=0||indicates that no record atributes are specified|
|RAT:PRN||FAT$B_RATTRIB=FAT$M_PRINTCC||FAB$B_RAT=FAB$M_PRN||indicates that the file has print file carriage control|
|REVDATE=date||FAT$C_REVDATE||XAB$Q_RDT||revision date and time|
|RFM:FIX||FAT$V_RTYPE=FAT$C_FIXED||FAB$B_RFM=FAB$C_FIX||indicates that record type is fixed-length|
|RFM:STM||FAT$V_RTYPE=FAT$C_STREAM||FAB$B_RFM=FAB$C_STM||indicates that the file is in RMS stream format|
|RFM:STMCR||FAT$V_RTYPE=FAT$C_STREAMCR||FAB$B_RFM=FAB$C_STMCR||indicates that the file is in RMS stream terminated by CR format|
|RFM:STMLF||FAT$V_RTYPE=FAT$C_STREAMLF||FAB$B_RFM=FAB$C_STMLF||indicates that the file is in RMS stream terminates by LF format|
|RFM:UDF||FAT$V_RTYPE=FAT$C_UNDEFINED||FAB$B_RFM=FAB$C_UDF||indicates that the file is in undefined record format (stream binary)|
|RFM:VAR||FAT$V_RTYPE=FAT$C_VARIABLE||FAB$B_RFM=FAB$C_VAR||indicates that the record type is variable-length|
|RFM:VFC||FAT$V_RTYPE=FAT$C_VFC||FAB$B_RFM=FAB$C_VFC||indicates that the record type is variable-length fixed control|
|VRS:value||FAT$W_VERSIONS=word||XAB$W_VERLIMIT=word||default version limit (valid only if the file is a directory)|
- /[NO]BACKUP specifies whether the BACKUP utility records the contents of the file. /NOBACKUP causes only the attributes of the file to be recorded, but not its contents; this is usually used for system files such as INDEXF.SYS or page and swap files. This qualifier is valid only for ODS-2 and ODS-5 files.
- /BEFORE[=time] selects only the files dated prior to the specified date. See the full description of this qualifier in the dedicated article.
- /BY_OWNER[=uic] selects only those files whole owner UIC matches the specified UIC. The default is the UIC of the current process.
- /CACHING_ATTRIBUTE=keyword controls the default caching option used by the Extended File Cache when an application accesses the file without specifying which caching option it wants to use on this file or, if the file is a directory file, which caching option will be inherited by new files and subdirectories created in this directory. The keywords are:
- WRITETHROUGH: the file should be cached
- NO_CACHING: the file should not be cached
- /[NO]CONFIRM controls whether a request is issued before each SET FILE operation to confirm whether the operation should be performed on each particular file. See CONFIRM Qualifier for a full description of this qualifier.
- /CREATED: see /BEFORE or /SINCE.
- /DATA_CHECK[=([NO]READ,[NO]WRITE)] specifies whether a read data check (rereading each record), a write data check (reading each record after it is written), or a combination of the two is performed on the file during transfers. By default, a write data check is performed.
- /END_OF_FILE resets the end-of-file (EOF) mark to the highest block allocated.
- /ENTER=new-filespec creates an alias or a hardlink for the file.
- /ERASE_ON_DELETE specifies that the specified files are explicitly erased from the disk when removed with the DELETE or PURGE command.
- /EXCLUDE=(filespec[,...]) excludes the specified file from the operation. See EXCLUDE Qualifier for a full description of this qualifier.
- /[NO]EXPIRATION_DATE[=date] controls whether an expiration date is assigned to specific files. Expiration date is used to protect files from overwriting: to overwrite an unexpired file, you will have to specify /OVERRIDE=EXPIRATION when you mount the volume. Requires Read, Write, and Control access to the file. Date should be specified as absolute time; absolute time keywords are allowed. If you specify 0 as the date, today's date is used.
- /EXTENSION[=n] sets the extend quantity default for the file, the number of blocks to extend a sequential file. The value of n can range from 0 to 65,535. If you omit the value specification or specify a value of 0, OpenVMS Record Management Services (OpenVMS RMS) calculates its own value for the /EXTENSION qualifier.
- /[NO]GLOBAL_BUFFER[=keyword[=n]] sets the RMS global buffer count (the number of buffers that can be shared by processes accessing the file) for the specified files. The keywords are:
- COUNT=n specifies the longword count of the number of global buffers
- PERCENT=p specifies the size of the global cache as percent of the total number of blocks currently used in the file.
- DEFAULT requests RMS at runtime to recalculate the global cache size based on an algorithm that makes use of two global buffer SYSGEN parameters, GB_CACHEALLMAX and GB_DEFPERCENT.
- /MODIFIED modifies the time value specified with /BEFORE or /SINCE. See BEFORE Qualifier or SINCE Qualifier for more information.
- /[NO]MOVE controls whether movefile operations are enabled on the specified volume. When you create a file, movefile operations are enabled on that file. You should disable movefile operations on specialized files that are accessed other than through the XQP (such as files accessed through logical I/O to a disk). Note that movefile operations are automatically disabled on critical system files. Do not enable movefile operations on these files.
- /NODIRECTORY removes the directory attributes of a file, which allows you to delete the file even if other files are contained in the directory. Requires SYSPRV.
- /REMOVE allows you to remove aliases and hardlinks.
- /SHARE allows you to enable or disable global buffers or statistics on a file currently being accessed by other users. Requires SYSPRV.
- /[NO]SHELVABLE controls whether the file is shelvable.
- /SINCE selects only those files dated on or after the specified time. See SINCE Qualifier for a full description of this qualifier.
- [NO]STATISTICS enables the gathering of RMS statistics on the specified file. These statistics can then be viewed by using the Monitor utility, which is invoked with the DCL command MONITOR. The SET FILE/STATISTICS command applies an application ACE to the specified file. The ACE does not affect access control and is only meaningful to the application assigning it.
- /STYLE=keyword spcifies the file name format for display purposes. The valid keywords are:
- CONDENSED (default) displays a file name representation of what is generated to fit into a 255-length characters string. The filename may contain a DID or FID abbreviation in the file specification.
- EXPANDED displays the file name representation of what is stored on the disk. This filename does not contain any DID or FID abbreviations.
- /[NO]SYMLINK indicates whether the symbolic link is set. If an input file is a symbolic link, the file referred to by the symbolic link is the file that is set.
- /TRUNCATE truncates the file at the end of the block containing the end-of-file (EOF) marker, that is, the qualifier releases allocated but unused blocks of the file.
- /UNLOCK clears a file marked as deaccess locked. Deaccess locking is required by and used by those few applications that maintain their own locking and consistency, typically without the use of the OpenVMS distributed lock manager, and potentially also without the use of RMS. When an application using deaccess locking does not correctly deaccess the file (often due to an application or system failure), the file is marked as locked, and is thus inaccessable until the integrity of the contents of the file are verified and the SET FILE/UNLOCK command is used. This command does not affect the state of files that are locked using RMS or the distributed lock manager.
- /VERSION_LIMIT[=n] specifies the maximum number of versions for the specified file. No value specified or 0 means that the version number is only limited by the [[Files-11] architectural limit of 32,767.