FFILEINFO

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Itemnum Item Type Item Description

File designator (28 bytes): Returns the file designator of the file being referenced in the format:

filename.groupname.accountname

Must be >=28 bytes in length. Unused bytes are filled with right-justified blanks and a nameless file returns an empty string.

The fully qualified name of the file referenced by filenum is returned as the value of this itemnum. Only names which can be expressed using MPE-only semantics are returned by this itemnum. If the name of the object referenced by filenum can not be expressed using MPE-name semantics a CCL condition code is returned. Calling FCHECK for filenum after this error occurs will result in error.

U16

File options: Returns file characteristics (refer to the FFfoption figure).

The record format extension bit is returned as the foption (1:1) bit. Byte stream record format is represented as a record format extension of one with a variable record format foption (8:2) bits equal to 01.

Directories, symbolic links, device links, pipes and FIFO's can not be represented by foptions. If the object referenced by filenum is one of these objects, a CCL condition code is returned. Calling FCHECK for filenum after this error occurs will result in error.

3 U16 Access options: Returns file access information (refer to the FFaoption figure).

I16

(CM) Record size: Returns the logical record size associated with the file:

If the file was created as a binary file, this value is positive and is in halfwords.
If the file was created as an ASCII file, this value is negative and is in bytes.

For message files, when there is call to FCONTROL with controlcode=46, the value returned is the size of the data records, including the 4 byte header.

Maintained for compatibility with MPE V/E-based systems only. CM record sizes are imposed when FGETINFO returns record size information on all file types. If the record size exceeds the limits, a zero is returned.

NOTE: If a zero is returned, use item 67.

I16

Device type/subtype: Returns the type and subtype of the device being used for a KSAM, RIO, circular, or message file, or devices such as a tape drive, printer, or terminal where bits (0:8) indicate the device subtype, and bits (8:8) indicate the device type.

If the file is not spooled or is opened as a spoolfile through the logical device, the actual value is returned. If an output file is spooled and was opened by device class name, the type and subtype of the first device in its class is returned. (This may be different from the device actually used.)

U16

Logical device number: Returns the logical device number of the device where the disk file label resides.

If the file is a disk file, the LDEV is the location of the file label. (File data can reside on the same device as the file label.)
If the file is spooled, the LDEV is a virtual device number that does not correspond to the system configuration I/O device list.
If the file is located on a remote computer, linked by a DS point-to-point or X.25 link, the left eight bits (0:8) are the LDEV of the distributed system (DS) device.
If the file is located on a remote computer, linked by NS 3000/XL, the left eight bits (0:8) are the remote environment of the connection. The right eight bits (8:8) are the LDEV of the device on the remote computer where the file label resides.
If the DS device for the RFA or the LDEV is 0, then a zero is returned.

NOTE: If a zero is returned, use item 50.

7 U16 Hardware device address: Returns 2048. Maintained to provide backward compatibility with MPE V/E-based systems.

8 I16 File code: Returns the file code of a disk file (refer to FFILEINFO for file codes).

9 I32 Current logical record pointer: Returns the current logical record pointer setting. This value is the displacement in logical records from record number 0 in the file and identifies the record that would be accessed next by FREAD or FWRITE.

10 I32 EOF: Returns the pointer setting of the last logical record currently in the file (equivalent to EOF). If the file does not reside on disk, the value is zero. For message files, when a call is made to FCONTROL with itemnum=46, the number of records returned includes open, close, and data records.

11 I32 File limit: Returns a number representing the last logical record that can exist in the file (equivalent to the file limit). If the file does not reside on disk, the value is zero.

12 I32 Log count: Returns the logical records passed to and from the program during the current file access.

13 I32 Physical count: Returns the number of buffered physical I/O operations performed since the last FOPEN/HPFOPEN call (records).

I16

Block size: Returns the file block size:

If the file is binary, the value is positive and the size is in halfwords.
If the file is ASCII, the value is negative and the size is in bytes.

Maintained for compatibility with MPE V/E-based systems only. CM block size limits are used when FGETINFO returns block size information on all file types (STD, KSAM, RIO, CIR, MSG). If the block size of the specified file exceeds the limits, zero is returned.

NOTE: If a zero is returned, use item 68.

I16

Extent size: Returns the extent size; for compatibility with MPE V/E-based systems only.

NOTE: If a zero is returned, use item 69. If extent size is specified or the maximum number of extents is specified at file creation, the size and number of extents are determined by the operating system and the item values are not actual values; they are calculated using system defaults.

U16

Maximum number of extents:

If the extent size or maximum number of extents is specified as zero at file creation, then the size and number of extents are determined by the system. In that case, these item values are calculated using system defaults defaults and do not reflect actual values.

17 I16 User labels: Returns the number of user labels defined for the file during creation. If the file is not a disk file, this number is zero. When an old file is opened for overwrite output, the value is not reset and the old user label is not destroyed.

Creator: Returns the name of the file creator (at least 8 bytes). If the file does not reside on disk, blanks are returned.

An unqualified form of the file owner's name is returned as the value of this itemnum. The file owner is not neccessarily the file's creator. File ownership may be changed using (see engineer).

A symbolic zero (ASCII 48 in decimal) is returned as the file owner for root directories, accounts, and MPE groups created prior to the POSIX release.

If the file is not located in the account in which the file owner is a member, a blank file owner name is returned. Item number 85 should be used to obtain the full file owner name instead of item 18.

19 I32 Label address: Returns a zero. For compatibility with MPE V/E-based systems only.

20 I16 Blocking factor

21 I16 Physical block size; indicates halfwords

22 I16 Data block size; indicates halfwords

23 I16 Offset to data in blocks; indicates halfwords

24 I16 Offset of active record table for RIO files; indicates halfwords

25 I16 Size of active record table within the block; indicates halfwords

26 CA Volume ID (tape label)

27 CA Volume set ID (tape label)

28 U16 Expiration date (julian format)

29 I16 File sequence number

30 I16 Reel number

31 I16 Sequence type

32 U16 Creation date (julian format)

33 I16 Label type

34 I16 Current number of writers

35 I16 Current number of readers

36 U16 File allocation date, when the file was last restored (CALENDAR format)

37 I32 File allocation time, when the file was last restored (CLOCK format)

U16

Spoolfile device file number:

Bits (1:15) = Device file number
Bit (0:1) = 1 Output spoolfile
Bit (0:1) = 0 Input spoolfile

If the spoolfile device number is larger than 32767, itemnum 38 returns 0 (zero). Use itemnum 78 instead for spoolfile numbers larger than 32767.

40 I32 Disk device status: Returns a zero. For compatibility with MPE V/E-based systems only.

41 I16 Device type

42 I16 Device subtype: Always returns an 8. (Indicates a 7933 or 7935 disk drive)

43 CA Environment file name (>=36 bytes)

44 I16 Number of disk extents currently allocated to the file

45 CA File name from labeled tape header 1 record (>= 17 bytes)

46 I16 Tape density

47 I16 DRT number: Always returns an 8.

48 I16 Device unit number: Always returns a 0.

49 U16 Equivalent to a software interrupt PLABEL for message files

50 U16 Real device number of the file

I16

Remote environment number

NOTE: If using NS 3000/XL RFA (remote file access), specify DSDEVICE ldev# when you are using a DS (point-to-point or X.25) link.

52 I32 Last modification time (CLOCK format) Zero is returned as the modification time for root directories, accounts, and MPE groups created prior to the POSIX release.

53 U16 Last modification date (CALENDAR format) Zero is returned as the modification time for root directories, accounts, and MPE groups created prior to the POSIX release.

54 U16 File creation date (CALENDAR format) Zero is returned as the modification time for root directories, accounts, and MPE groups created prior to the POSIX release.

55 U16 Last access date (CALENDAR format) Zero is returned as the modification time for root directories, accounts, and MPE groups created prior to the POSIX release.

56 I32 Number of data blocks in a variable length file

57 I16 Number of user labels written to the file

58 I16 Number of accessors having output access (write) for a particular file

59 I16 Number of accessors having input access (read/update) for a particular file

I16

Terminal type:

0: File's associated device not a terminal
1: Standard hardwire or multipoint terminal
2: Terminal connected through phone-modem
3: DS pseudo-terminal
4: X.25 Packed Switching Network PAD (packet assembler/disassembler) terminal
5: NS virtual terminal

NS 3000/XL remote environment ID name

NOTE: If using NS 3000/XL RFA (remote file access), specify DSDEVICE ldev# when using a DS (point-to-point or X.25) link. A buffer must be provided for the node name (or envid) with the required space of 52 bytes; otherwise, data corruption may occur on variables following itemnum=61 or an FSERR 73, BOUNDS VIOLATION may be returned.

62 CA File lockword (8 bytes):

63 CA Unique file identifier (UFID) (20 bytes):

64 @64 Virtual address of the file: Applicable for standard disk files only. (Requesting itemnums 64, 74, or 75 for any other file type, RIO, MSG, CIR, causes an error and returns CCL (1).)

65 Reserved for the operating system.

66 @32 Virtual address of global unique file descriptor (GUFD):

67 U32 (NM) Record size (indicates bytes)

68 U32 Block size (indicates bytes)

69 U32 Extent size (indicates bytes)

74 @64 Virtual address of file label: Applicable for standard disk files only. (Requesting itemnums 64, 74, or 75 for any other file type (RIO, MSG, CIR) causes an error and returns CCL (1).)

75 CA Hardware path: Applicable for standard disk files only. (Requesting itemnums 64, 74, or 75 for any other file type (RIO, MSG, CIR) causes an error and returns CCL (1).)

Volume restriction (34 bytes): The last two characters indicate the type:

0: File placed on the specified volume at creation
1: File can be placed on any volume containing the specified class at creation
2: File can be placed on any volume within the specified volume set at creation (Default)

77 U32 Transaction management log set ID If itemnum 77 = 0 (zero), the file is not attached to the XM (Transaction Management) log.

U32

Spoolfile device file number:

Bits (1:31) = Device file number
Bit (0:1) = 1 Output spoolfile
Bit (0:1) = 0 Input spoolfile

I16

File's pending disposition

0 = No change, the disposition is the same as before the file was opened
1 = Permanent
2 = Temporary (tape files rewound)
3 = Temporary (same as 2 except tape files not rewound)
4 = Released (purged)
5 = Temporary (but the file was previously a permanent file)

HFS syntax filename:

This itemnum returns a null-terminated POSIX-syntax system absolute pathname for the file or directory referenced by filenum. On input the first four bytes of this buffer are interpreted as a 32-bit unsigned integer specifying the maximum buffer size in bytes. This maximum buffer size does not include the four bytes used to represent this size. On output the first four bytes of the buffer represent the pathname length excluding the null-terminator as an unsigned integer. The pathname is returned in the bytes following the pathname length. Bytes beyond the null-terminator should be considered undefined. If the maximum buffer length is incorrect on input, variables allocated near the buffer may be overwritten or a bounds violation may occur. A zero pathname length is returned for unnamed new files and when an error occurs. Zero is the mininum buffer length on input for this itemnum.

81 U32 32-bit unsigned integer by reference. The current number of hard links to the file.

I32

32-bit signed integer by reference. Time of last file access in clock format. The bit assignments are:

Bits 0: 7 hours
Bits 8: 15 minutes
Bits 16: 23 seconds
Bits 24: 31 tenths of seconds

83 I32 32-bit signed integer by reference. Time of last file status change. (Clock format - See item 82 for a description of the format).

U16

16-bit unsigned integer by reference. Date of last file status change in calendar format. The bit assignements are:

Bits 0 - 7: Year of the century
Bits 8 - 15: Day of the year

32-byte character array by reference. File Owner:

The full file owner name. Unused characters are blank filled. A symbolic zero (ASCII 48 in decimal) is returned as the file owner for root directories, accounts, and MPE groups created prior to the POSIX release.

I32

32-bit signed integer by reference. File owner identifier:

The file owner identifier (UID). Zero is returned as the file owner ID for root directories, accounts, and MPE groups created prior to the POSIX release.

32-byte character array by reference. File group:

The file group name. Unused characters are blank filled. A symbolic zero (ASCII 48 in decimal) is returned as the file group for root directories whose GID's have not been assigned.

I32

32-bit signed integer by reference. File group identifier:

The file group identifier (GID). Zero is returned as the file group ID for root directories whose GID's have not been assigned.

U32

32-bit unsigned integer by reference. File type:

The following valid file types may be returned:

0: Ordinary File
1: KSAM/3000
2: RIO
3: KSAM XL
4: CIR
5: Native Mode Spool File
6: MSG
7: KSAM64
8: Not Applicable
9: Directory
10-11: Not Applicable
12: Pipe
13: FIFO
14: Symbolic link
15: Device link

U32

32-bit unsigned integer by reference. Record type:

The following valid record types may be returned:

0: Fixed
1: Variable
2: Undefined
3: Spool block
4: Root directory
5: Not applicable
6: Account directory
7: Group directory
8: Not applicable
9: Byte stream
10: Hierarchical directory

91 I64 64-bit signed integer by reference. The current file size in bytes. The value returned represents the current position of the End-of-File (EOF) and may not reflect the number of bytes actually occupied by the file on disk if the file is sparsely allocated.

I32

32-bit signed integer by reference. KSAM file version:

This item returns a value indicating the version of a KSAM file. A value of 1 indicates an original type KSAM XL file, and a value of 2 indicates the next generation KSAM XL file. A value of 4 indicates that it is a KSAM64 file. A value of zero is returned if the file is not a KSAM file.

U32

32-bit unsigned integer by reference. NM Plabel:

This item returns a 32-bit NM Plabel of a message file interrupt handler. Interrupts may be enabled on message files by calling the FCONTROL intrinsic with item 48 and the Plabel address.

I32

32-bit signed integer by reference. MPE/iX device type:

This item returns the following values for the following types of devices:

0: Disk device
1: Tape device
2: Terminal device
3: Printer device
4: Remote device
5: Ports device
6: Reserved
7: Streams device
8: Sockets device

I32

32-bit signed integer by reference. Close-on-Exec:

This item returns a value indication whether or not this filenum is closed if one the POSIX.1 exec() family of functions if called. A value of 1 means that the file is closed on an exec() call, while a value of 0 indicates the file will survive across exec() calls.

I32

32-bit signed integer by reference. POSIX Append mode:

This item returns a value indicating whether or not this filenum has the POSIX.1 append mode flag set. When the append mode flag is set on files that support this feature, all writes occur at the end of the file, although reads may occur anywhere in the file. A value of 1 indicates that the POSIX.1 append mode is on, while a value of 0 indicates the append mode is off.

The only time that the POSIX.1 append mode is valid is when a file has been oepned for byte stream access (HPFOPEN option 77 with a value of 2).

I32

32-bit signed integer by reference. POSIX non-block mode:

This item returns a value indicating whether or not this filenum has the POSIX.1 non-block flag set. When the non-block flag is set, on files that support this feature, reads, writes, and opens can be affected in a file dependent manner. In general, operations that would otherwise have impeded the caller results in immediate return when this flag is set. A value of 1 indicates the non-block flag is set, while a value of zero indicates the flag is not set.

The only time the non-block flag is valid is for pipes and FIFO's.

FFILEINFO

MPE documents

Syntax

Parameters

Table 9-2 FFILEINFO Itemnum/Item Values

Table 9-3 FFILEINFO File Codes

Operation Notes

Condition Codes