shmctl
- shmctl ID,CMD,ARG
Calls the System V IPC function shmctl. You'll probably have to say
use IPC::SysV;
first to get the correct constant definitions. If CMD is
IPC_STAT, then ARG must be a variable that will hold the returnedshmid_dsstructure. Returns like ioctl: the undefined value for error, "0but true" for zero, or the actual return value otherwise. See also "SysV IPC" in perlipc andIPC::SysVdocumentation.
