Mem shize for a shared mem (shmget)

[vijesh]

Dear Monks, I use following program to get a shared mem location. How do I know how much size of shared mem is getting allocated? how possible is to release that mem size once I am done. -Thanks, Vijesh

my $id = shmget($key, $size, &IPC_CREAT | 0777 );

[Anonymous Monk]

Hmm, it either allocates how much you ask for, or it fails? What does man shmget say?

[vijesh]

it just returns the shared mem location. Does not say anything about the size. please find some perld

  DB<1> n
main::(shm.pl:10):      my $id = shmget( $key, $size, &IPC_CREAT | 077
+7 );
  DB<1> x shmget( $key, $size, &IPC_CREAT | 0777 );
0  9142327
  DB<2> p $key
90
  DB<4> p $size
100

  DB<5>

[vijesh]

hello Monks, any help will be appreciated. -Thanks