* Tom Lane <[EMAIL PROTECTED]> [010306 10:35] wrote: > Alfred Perlstein <[EMAIL PROTECTED]> writes: > > > What about encoding the shm id in the pidfile? Then one can just ask > > how many processes are attached to that segment? (if it doesn't > > exist, one can assume all backends have exited) > > Hmm ... that might actually be a pretty good idea. A small problem is > that the shm key isn't yet selected at the time we initially create the > lockfile, but I can't think of any reason that we could not go back and > append the key to the lockfile afterwards. > > > you want the field 'shm_nattch' > > Are there any portability problems with relying on shm_nattch to be > available? If not, I like this a lot... Well it's available on FreeBSD and Solaris, I'm sure Redhat has some deamon that resets the value to 0 periodically just for kicks so it might not be viable... :) Seriously, there's some dispute on the type that 'shm_nattch' is, under Solaris it's "shmatt_t" (unsigned long afaik), under FreeBSD it's 'short' (i should fix this. :)). But since you're really only testing for 0'ness then it shouldn't really be a problem. -- -Alfred Perlstein - [[EMAIL PROTECTED]|[EMAIL PROTECTED]] ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Lamar Owen
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Tom Lane
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Lamar Owen
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Tom Lane
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Lamar Owen
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... dom
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Alfred Perlstein
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Tom Lane
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Alfred Perlstein
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Tom Lane
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Alfred Perlstein
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Tom Lane
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Alfred Perlstein
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Tom Lane
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Alfred Perlstein
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Cyril VELTER
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Alfred Perlstein
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Peter Eisentraut
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Lamar Owen
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Alfred Perlstein
- Re: [HACKERS] How to shoot yourself in the foot: kill -9 ... Tom Lane