The D Programming Language's Unofficial Docs
beta
The D Programming Language's Unofficial Docs
beta
| Value | Meaning |
|---|---|
| F_OFD_GETLK36 | Queries the system if the lock could be placed |
| F_OFD_SETLK37 | Acquires or releases an open file description lock |
| F_OFD_SETLKW38 | Same as F_OFD_SETLK, but waits if a conflicting lock is held on the file |
Open File Description locks
Usually record locks held by a process are released on *any* close and are not inherited across a fork().
These cmd values will set locks that conflict with process-associated record locks, but are "owned" by the open file description, not the process. This means that they are inherited across fork() like BSD (flock) locks, and they are only released automatically when the last reference to the the open file against which they were acquired is put.