shmread

shmread 
id
, 
var
, 
pos
, 
size

Reads from the shared memory segment id starting at position pos for size size (by attaching to it, copying out, and detaching from it). var must be a variable that will hold the data read. The function returns true if successful, or false if there is an error. On error, it puts the error code into $! . This function is available only on machines supporting System V IPC.