22 May
2003
22 May
'03
6:05 a.m.
Simon Marlow writes:
Even using a ProcessID doesn't guarnatee uniqueness [...]
Why not? If I use the file only temporarily (it is gone once the process terminates), something like /tmp/foo.<pid> will be unique, for all I can tell.
The right way to do this is to try to open it for writing, and try a different name if the open fails.
Unfortunately, this approach features a race condition because POSIX has no notion of mandatory file locking. I'd really rather avoid this, if I can. Is there no other way? And one that works across different compilers? Peter