FWRITELABEL
MPE documents | |
 Complete PDF | |
| Table of Contents | |
| Index | |
| Edition 7 E0701 ♥ | |
| Edition 7 E0300 | |
| Edition 6 E0195 |
Syntax
I16V UDS I16V I16V
FWRITELABEL (filenum, buffer, length, labelid);
Parameters
- filenum
16-bit signed integer by value (required)
Passes the file number of the file to be labeled.
- buffer
user-defined structure (required)
Passes the label to be written. If the file is a labeled magnetic tape file, this label must be 40 half words in length.
- length
16-bit signed integer by value (optional)
Passes the number of half words or bytes passed by buffer. A positive value is in half words; a negative value is in bytes.
- labelid
16-bit signed integer by value (optional)
Passes the number of the label to be written. The first label is zero. This parameter is ignored for labeled tapes. The next sequential tape label is written. The default is zero.
Operation Notes
Once a disk file is opened, it is possible to read from or write to user-defined labels regardless of the access to the rest of the file. If the file is on labeled magnetic tape, the user-defined label must be 40 half words in length to conform to the length of the ANSI-standard or IBM-standard label.
Condition Codes
| CCE (2) | Request granted. |
| CCG (0) | Request denied. The calling process attempted to write a label beyond the limit specified in the FOPEN/HPFOPEN intrinsic when the file was created. |
| CCL (1) | Request denied. An error occurred. |
Related Information
| Intrinsics | FUPDATE, FWRITE, FWRITEDIR, FREADLABEL |
| Manuals |
Accessing Files Programmer's Guide Using KSAM XL KSAM/3000 Reference Manual |
|
FWRITEDIR |
GENMESSAGE |