HP Fortran Programmer's Reference (September 2007)

HP Fortran statements
OPEN
Chapter 10410
OPEN
Connects file to a unit.
Syntax
OPEN ( io-specifier-list )
io-specifier-list
is a list of the following comma-separated I/O specifiers:
[UNIT=] unit
specifies the unit to connect to an external file. unit must be an integer
expression that evaluates to a number greater than 0. If the optional
keyword UNIT= is omitted, unit must be the first item in
io-specifier-list .
ACCESS= character-expression
specifies the method of file access. character-expression can be one of the
following arguments:
ACTION= character-expression
specifies the allowed data-transfer operations. character-expression can
be one of the following arguments:
Table 10-33
'DIRECT' Open file for direct access.
'SEQUENTIAL' Open file for sequential access
(default).
' POSITION=
APPEND'
To open a file for append (to
position the file just before the
end-of-file record)
Table 10-34
'READ' Do not allow WRITE and
ENDFILE statements.
'WRITE' Do not allow READ statements.