provides the correct semantics for flock(2) style locks which are used by the
lockf(1) command line tool and the pidfile(3) library. It also implements
recovery from server restarts and ensures that dirty cache blocks are written
to the server before obtaining locks (allowing multiple clients to use file
locking to safely share data).
Sponsored by: Isilon Systems
PR: 94256
MFC after: 2 weeks
message and then dumps core because the subsequent code assumes that
mmap() succeeded. Since rpc.statd does not have fallback code to
implement the functionality needed to operate on the status file if
it is not memory mapped, rpc.statd should use err() to force the process
to exit if the mmap() call fails.
PR: bin/115430 (mmap() failure previously fixed in statd.c 1.15)
Approved by: re (kensmith)
MFC after: 1 week
SM_NOTIFY procedure.
Remove our hand-coded one as it was causing world breakage for
worlds compiled with NOSHARED=yes because the static linker is a
bit less forgiving (or not as broken as) our dynamic linker.
Add $FreeBSD$ while I'm here.
Pointed out by: bde
- Use MAP_FAILED instead of the constant -1 to indicate
failure (required by POSIX).
- Removed flag arguments of '0' (required by POSIX).
- Fixed code which expected an error return of 0.
- Fixed code which thought any address with the high bit set
was an error.
- Check for failure where no checks were present.
Discussed with: bde
