=over =item shmread ID,VAR,POS,SIZE X X =item shmwrite ID,STRING,POS,SIZE Reads or writes the System V shared memory segment ID starting at position POS for size SIZE by attaching to it, copying in/out, and detaching from it. When reading, VAR must be a variable that will hold the data read. When writing, if STRING is too long, only SIZE bytes are used; if STRING is too short, nulls are written to fill out SIZE bytes. Return true if successful, false on error. L|/shmread ID,VAR,POS,SIZE> taints the variable. See also L and the documentation for L|IPC::SysV> and the L|IPC::Shareable> module from CPAN. Portability issues: L and L. =back