pSOSystem System Calls - Read

pHILE+ System Calls annex_f
Notes
See Also
Hex Mnemonic Description
0x201A E_FIDBIG Invalid FID; exceeds maximum.
0x201B E_FIDOFF Invalid FID, file is closed.
0x201C E_ININFULL Index block is full.
0x201D E_VFULL Volume is full.
0x2026 E_BADMS MS-DOS volume; illegal operation.
0x2050 E_BADNFS NFS volume; illegal operation.
0x2060 E_BADCD CD-ROM volume; illegal operation.
1. annex_f() expands the physical size of a file but does not change its logical
size or the end-of-file position.
2. read_f() and lseek_f() calls into annexed blocks are not allowed until the
logical length of the file is extended by writing data into the annexed blocks.
3. A volume full error occurs if no blocks can be added to the file.
4. Unless the blocks are merged into the file's last extent, a new extent descriptor
is added to the file as a result of an annex_f() call.
5. On volumes with separate control and data regions, the pHILE+ file system
manager automatically determines the type of block to be annexed (based on
the file type.) Directory files receive control blocks, and ordinary files receive
data blocks.
6. Annexes to BITMAP.SYS and FLIST.SYS are not allowed.
write_f, open_f, read_f, lseek_f
pSOSystem System Calls 2-9
2