Using pfsctl (BPX1PCT) Physical File System Control for HFS
The following information describes the use of pfsctl, BPX1PCT callable service, for HFS.
The pfsctl callable service, BPX1PCT, conveys a command and an argument to a physical file system. The meaning of the command and argument are specific to the physical file system and are defined by the physical file system.
CALL BPX1PCT,(File_System_type,
Command,
Argument_length,
Argument,
Return_value,
Return_code,
Reason_code)
File_System_type: Type: Character string
Length: 8 bytes
Character string: HFS
Command: Type: Integer
Length: Fullword
X'40000001' DisplayBufferLimits
X'00000002' ChangeBufferLimits
X'40000003' DisplayGlobalStats
X'40000004' DisplayFSStats
X'00000005' ExtendFS
These HFS-defined commands and the data areas for each are defined in GFUMPCTL, located in SYS1.MODGEN.
Argument_Length: A 4-byte integer. See below for the valid values.
Argument: Structure as described below and in Table 2, Table 3, Table 4, or Table 5.
Return Value: Fullword
Return_Code: A 4-byte integer that BPX1PCT sets to one of the values described in Table 1.
Reason_Code: A 4-byte integer that BPX1PCT sets to one of the values described in Table 1.