QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
Dosfsys support for synchronous write |
| Ref. No. |
QNX.000009706 |
| Category(ies) |
Filesystem |
| Issue |
Does Dosfsys supports synchronous write?
|
| Solution |
No, Dosfsys (QNX 4.24) does not support a synchronous write. The block device hosting the DOS file system is just accessed through open (O_RDWR) and block_write() calls. Removable media does have a periodic fsync() done to it, but not a fixed disks. The behaviour is determined by the Fsys parameters (-d etc).
A useful extention would be to use the O_SYNC flag when opening the DOS file and having Dosfsys call fsync() on the device that fd is written to. |
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