MOPEN Function: UNIX
Opens a file by directory ID and member name, and
returns either the file identifier or a 0.
| Category: |
External Files |
| UNIX specifics: |
OPEN modes |
| See: |
MOPEN Function in SAS Functions and CALL Routines: Reference |
Syntax
MOPEN(directory-id,member-name<,open-mode<,record-length<,record-format>>>)
Required Argument
- open-mode
-
specifies the type
of access to the file:
| A |
APPEND mode allows writing new records after the
current end of the file.
|
| I |
INPUT mode allows reading only (default). |
| O |
OUTPUT mode defaults to the OPEN mode specified
in the host option in the FILENAME statement or function. If no host
option is specified, it allows writing new records at the beginning
of the file.
|
| S |
Sequential input mode is used for pipes and other
sequential devices such as hardware ports.
|
| U |
UPDATE mode allows both reading and writing. |
| W |
Sequential update mode is used for pipes and other
sequential devices such as ports.
|
Details
Note: This version is a simplified
version of the MOPEN function syntax. For the complete syntax and
its explanation, see the
MOPEN Function in SAS Functions and CALL Routines: Reference.
MOPEN returns the identifier
for the file, or 0 if the file could not be opened.