MPE/iX Commands Reference Manual (32650-90877)

94 Chapter3
Command List I
Commands ABORT to BYE
MPE Syntax
If the
filereference does not begin with a dot or a slash, it is parsed
according to the MPE Syntax and has the following format:
filename [/ lockword ][. groupname [. acctname ]]
MPE names must contain from one to eight alphanumeric characters,
beginning with an alphabetic character. If
acctname is specified, you must
have create directory (CD) access to the target group in the account. The
default
groupname and acctname are the logon group and account.
HFS Syntax
If the
filereference begins with a dot (.) or a slash (/), it is parsed
according to the HFS Syntax. In this case the
filereference can consist
of 1 to 253 characters for relative pathnames (for example, ./253chars),
and 254 characters for absolute names (for example, /254chars).
The following Syntax rules apply:
• File names are not upshifted.
• File names can be up to 254 characters in length for absolute
pathnames, and 253 characters for relative pathnames.
• File names can begin with, and contain, any of the following characters:
a-z, A-Z, 0-9, _, .
• File names can contain (but not begin with ) a dash (-).
File names are of the form
path/filename
where the path/filename combination may have a maximum of 255
characters.
recsize Record size. A positive number indicates words, while a negative number
indicates bytes for new files only. For fixed length files, this is the logical
record size. For undefined length files, this is the maximum record size.
For variable length files, this is the maximum logical record size if
blockfactor is 1. If not, this is used to calculate the maximum logical
record size and physical record size. For byte-stream files,
recsize is 1
byte.
Records always begin on word boundaries. Therefore, the record size is
rounded up to the nearest word boundary for block size calculations. For a
binary file or a variable length ASCII file, odd byte lengths are rounded up
and the extra byte is available for data.
However, if an odd byte length record size is specified for a fixed length or
undefined length record file, the extra byte is not available for data.
Default is the configured physical record width of the associated device. If
you do not use the DEV= parameter, the default is DISC with 1023 records.
For example, a fixed length ASCII file with a record size specified as 11